Chinese name:
seed
English name:
seed
Definition:
The structure of ovule growth in seed plants after fertilization.
Applied disciplines:
Chinese medicine (first-class discipline); Chinese medicine (two disciplines); Introduction to traditional Chinese medicine (third-level discipline)
The above contents have been approved and published by the National Committee for the Examination and Approval of Scientific and Technical Terminology, and are used to help edit encyclopedia business cards.
Seeds are unique propagules of gymnosperms and angiosperms, which are formed by ovule pollination and fertilization. Seeds are generally composed of seed coat, embryo and endosperm, and some mature seeds only have seed coat and embryo. The formation of seeds makes the young sporozoite jujube embryo protected by the mother and get adequate nutrition like the fetus of mammals. Seeds also have various structures suitable for spreading or resisting adverse conditions, which create good conditions for the racial continuation of plants. Therefore, seed plants can replace ferns in the process of plant system development. There are many different interpretations of the same word.
catalogue
People's education press primary school Chinese -Seed
Words and seeds
Basic explanation
detailed description
Brief introduction of plant seeds
Seed morphology
Seed structure
seed coat
embryo
endosperm
Life span of seeds
Different interpretations of the same word
Classification of seeds
Endosperm seed
Endosperm-free seed
mode of transmission
self propagation
wind dispersal
Water transport
Bird transmission
Ant spread
Mammalian transmission
Storage skills of medicinal seeds
People's education press primary school Chinese -Seed
Words and seeds
Basic explanation
detailed description
Brief introduction of plant seeds
Seed morphology
Seed structure
seed coat
embryo
endosperm
Life span of seeds
Different interpretations of the same word
Classification of seeds
Endosperm seed
Endosperm-free seed
mode of transmission
self propagation
wind dispersal
Water transport
Bird transmission
Ant spread
Mammalian transmission
Storage skills of medicinal seeds
launch
I'm a little unhappy to edit this paragraph of primary school Chinese-seeds by People's Education Publishing House. The lecture table is piled with acacia seeds, some of which are light yellow or even bean green. Seeds are mixed with pods and horns. But fortunately, everyone has handed in a lot of tree species. I glanced at the whole class and wanted to say something, but said nothing. I have just been assigned to this school as the head teacher of this class. I am new here, so I can't say anything. At this moment, a little girl came over. Dressed in elegant autumn clothes, she looks natural and graceful and slightly shy. She came up to me, smiled at me, lowered her head and reached into her trouser pocket. "Why, didn't you pick it?" I asked. "No, but not as much as them." Her face turned red, raised her upper eyelids and looked at me, standing there in shame. "So, what did you choose?" I asked again. She took out a small gourd from her pocket, took out a piece of paper from her pocket and spread it on the table. Then she stared at the mouth of the small gourd and shook it carefully. One, two, three ... I looked at the tree she poured out and my heart moved. The seeds are about the same size, like a full black bean, and each one is shining with raven luster. I think she must have picked and picked, picked and picked with those little hands to make the tree species so ordinary and shiny! I was infected by a pious childlike innocence, and my heart was full of warmth. Looking at her delicate cheeks and attentive expression, I seem to see that acacia tree thrives in the vast mountains and rivers of Yuan Ye, supporting a big green umbrella for the vast land. "Just a little." She shook the gourd and looked up. Our eyes just met. I smiled and nodded. She smiled shyly, brushed her short black hair away from her forehead and returned to her seat with a gourd. I glanced at the whole class and found dozens of pairs of eyes staring at the locust seeds on the white paper. I wrapped these locust tree seeds carefully, for fear of missing one. I stood on the platform and started my first speech as a teacher. Excerpt from People's Education Press, Primary School Language Room 1995, pp. 40-43. Edit this paragraph. Seed name: seed.
seed
Pinyin: zhǒng ziㄓㄨㄙˇㄗㄧ: Athena Chu's basic explanation ◎ Seed zhǒngzi (1) [seed] (2) Granular substances developed from plant embryos can germinate into new plant and vegetable seeds (3). Under certain conditions, it can germinate and become a new plant. Source: Jia Sixie Northern Wei Dynasty's "Qi Yao Min Shu Harvest Seeds": "In spring, wait for other plants to prepare for the seeds of the coming year." "Chen Shu Shi Zu Ji": "Very poor, give the seeds." Example: Scent I of Hong Shen fragrant rice: "There are only four or five loads of millet left at home, which should be eaten in winter and planted in the next spring. Most importantly.
seed
It is Zhou Taigong who has not paid the rice rent! Interpretation: (2). Extension is the root or root of things. Source: Song Sushi's "Ye Taoyuanguan's Two Poems Regard Their Rhyme": "Trouble has no roots at first, and love is the seed." Interpretation: (3). Refers to the heir. Often derogatory. Source: The third thorn in Jin Ping Mei: "Since he raised this seed, it is like giving birth to a prince." Example: The sixth and ninth chapters of A Dream of Red Mansions: "When Mrs. Xing heard this, she scolded Xi-feng and called Jia Lian" ungrateful! " ! ""Xiao Hong's Life Field "I:" Shit, who stole the sheep ... fucking seeds! " Interpretation: (4). Buddhist language. Yoga school and Faxiangzong, etc. Using the energy of plant seeds to produce corresponding results, that is to say, there are spiritual factors that produce various phenomena in the world in Araille's knowledge. Source: On the Establishment of Religion by Zhang: "Lai Ye only thinks that the seeds in his self-knowledge are separated, so his heart doesn't have to see action, but his environment can always be there." Interpretation: (5) The title of the pre-selected strong athlete when the elimination system or the group circulation system is adopted in the sports competition. Arrange the seeds in different parts or groups according to a certain position to ensure that the strong players can meet in the next few rounds, which will not only make the competition closer to the final more exciting, but also produce a more correct ranking. Interpretation: (6). Planting. Source: Tang Jiadao's poem "Taoist in the Mountain": "Cultivate the chicks into big cranes and make the seeds loose." Example: Song Mei Yao Chen's poem "Shi Jing sells plum blossoms" (V): "Who works hard to pick seeds and how much does it cost to steal the garden?" Edit this passage about plant seeds. Seeds are closely related to human life. In addition to the daily necessities of grain, oil and cotton, some medicines (such as almonds), seasonings (such as pepper) and drinks (such as coffee and cocoa) come from seeds. Edit the shape of the seed in this paragraph. The size and shape of seeds vary from species to species. Coconut seeds are big, rape and sesame seeds are small, and tobacco, purslane and orchid are even smaller. Broad beans and kidney beans are kidney-shaped, while peas and longan are spherical; Peanuts are oval; Melon has many seeds.
seed
It is oblate. There are many colors such as brown and black, but there are also other colors. For example, bean seeds are black, red, green, yellow and white. Some seeds are smooth and shiny, others are dull or rough. The reason for the roughness of the surface is that there are holes, grooves, reticulate patterns, stripes, protrusions, ridges and other carvings on the surface. Some can also see the spots left by the seeds falling off from the suspensor after maturity, such as navel and micropyle. Some seeds also have appendages such as wings, crowns, thorns, awns and hairs, which are helpful for the spread of seeds. The size of seeds varies greatly. A coconut seed with endocarp can weigh several kilograms, while the 1000-grain weight of medicinal plant Portulaca oleracea seed is only 0./kloc-0. 3g, and the parasitic higher plant Portulaca oleracea seed is even smaller, with a 1000-grain weight of only 0.0029-0.0049g. The seed sizes vary greatly, each with its own biological significance. For example, coconut seeds are very large, and the number of seeds per plant is limited. Because seeds germinate easily and are rich in liquid endosperm and nutrition, they can get "key protection". And those small seeds are more likely to succeed. Although only a few seeds can germinate, they can still produce a large number of offspring. Many annual weed plants reproduce in this way. Edit the structure of this seed. Generally speaking, the seeds of plants consist of seed coat, embryo and endosperm. The seed coat is the "armor" of the seed and plays a role in protecting the seed. Embryo is the most important part of seeds, which can develop into roots, stems and leaves of plants. Endosperm is the place where seeds concentrate nutrients, and the endosperm of different plants contains different nutrients.
seed coat
seed
Developed from integument, it has the function of protecting embryo and endosperm. The seed coat of gymnosperms consists of three different layers. The outer layer and the inner layer are fleshy layers, and the middle layer is stony layers. There is no pericarp outside the seeds of gymnosperms. The seed coat structure of angiosperms is varied, such as peanuts, peaches, apricots and other hard-skinned seeds, so the seed coat structure is simple and as thin as paper; In the seeds of wheat, corn, rice and lettuce, the pericarp and seed coat are healed, and the seed coat is squeezed close to the inner layer of the pericarp when the seeds mature; The seeds of some leguminous plants and cotton have a hard seed coat, a palisade thick-walled tissue cell layer under the epidermis, and a thick horny membrane on the epidermis. Some beans are difficult to germinate because the horny membrane is too thick. There is a lot of hair on the epidermis of cottonseed, which is cotton fiber. The seed coat, peripheral tissue or epidermal cells of tomato and pomegranate seeds are fleshy. The epidermal cells of tomato seed coat are soft, transparent, gelatinous and prickly. The epidermal cells of pomegranate peel stretch very long and become thin lines. Cell sap contains edible sugar; The edible parts of litchi and longan seed are different from pomegranate, which is composed of fleshy aril, and the aril is formed by the protrusion of funicle tissue around the seed. Seed coat structure is closely related to seed dormancy. Some plant seed coats contain germination inhibitors, so removing such plant seed coats will stimulate seed germination. Embryo includes cotyledon, embryo, hypocotyl and radicle. Developed from fertilized eggs. A fully developed embryo consists of germ, hypocotyl, cotyledon and radicle. The embryos of gymnosperms are all in the middle of the seeds.
seed
The only difference between embryos of different kinds of seeds is the number of cotyledons, ranging from 1 to 18. But there are two common cotyledons, such as cycad, ginkgo, yew, torreya grandis, sequoia, maize and ephedra. The shapes of angiosperm embryos are extremely diverse, such as oval, long column or arc, horseshoe, spiral and so on. Although the shape of the embryo is so different, its position in the seed is always fixed, and generally the radicle faces the micropyle. The cotyledons of embryos are also varied, some are slender and flat, some contain a lot of storage materials and are fleshy, such as peanuts and kidney beans, and some are thin slices such as castor. Some cotyledons are similar to real leaves, with serrated edges, and some are folded many times inside the seeds. For example, cotton embryos will develop into new plants in the future, embryos will develop into stems and leaves of plants, radicles will develop into roots of plants, and hypocotyls will develop into parts connecting roots and stems of plants. Cotyledons provide nutrition for the development of seeds. Endosperm develops from fertilized polar nuclei. The endosperm of gymnosperms is a haploid female gametophyte, which is generally developed and stores more starch or fat, and some contain aleurone particles. The endosperm is generally light yellow, a few are white, and the endosperm in the mature seeds of Ginkgo biloba is green. Most angiosperms have endosperm formation during seed development, but some species in mature seeds have no endosperm or only a small amount of endosperm, because their endosperm is decomposed and absorbed by embryos during development. Generally, mature seeds are divided into two categories: endosperm seeds and endosperm seeds. In endosperm-free seeds, the embryo is very large, and there are a lot of nutrients in all parts of the embryo, especially cotyledons. The ratio of embryo to endosperm in endosperm seeds varies greatly among various plants. There are great differences in the life, quantity and types of endosperm storage substances in different plants. The most common storage substances in endosperm are starch, protein and fat. There are carbohydrates, such as mannose and hemicellulose, which can be deposited on the cell wall, such as coffee, persimmon and jujube, which are all stored in this way. Starch-containing endosperm is often inanimate, such as starch-containing endosperm cells of Juncaceae, Cyperaceae, Gramineae, Polygonaceae and Dianthus, and their nuclei degenerate after maturity; Starch-containing endosperm cells of Liliaceae, Amaryllidaceae, Hemerocallis, Ricinus and Carrots are alive. Generally speaking, during the development of embryo and endosperm, the volume of embryo sac expands continuously, which destroys nucellar tissue outside embryo sac and is finally absorbed by embryo and endosperm. So there is no nucellar tissue in mature seeds. However, some plants retain nucellar tissue during seed development and store nutrients to form exoendosperm. Mature seeds of spinach, beet and coffee have exoendosperm. The mature seeds of pepper and ginger have both endosperm and exoendosperm. Edit the life span of the seeds in this paragraph. Seeds are still alive after leaving the mother's body, but the life span of seeds of various plants varies greatly. Division of its life span and genetic characteristics
seed
Whether the development is steady or not is related to environmental factors. Some plant seeds have a short life span, for example, the life span of Brazilian rubber seeds is only about one week, while that of lotus seeds is very long, ranging from hundreds to thousands of years. The extension of seed life is of great significance to the seed preservation of excellent crops, that is, the seed life can be extended by using storage conditions. The experiment shows that low temperature, low humidity, avoiding light and reducing oxygen content in the air are ideal storage conditions. For example, wheat seeds can only be stored for 2-3 years at room temperature, but at-10℃, the relative humidity is 30%, and the seed water content is 4-7%, which can be stored for 13 years, while at-10℃, the relative humidity is 30% and the seed water content is 4-3 years. Many countries use low temperature, drying and air conditioning technology to store excellent seeds, which makes the preservation of improved seeds change from planting to storage, greatly saving manpower and material resources and ensuring the quality of improved seeds. Edit this paragraph and explain the same words. 1. Seed of obstetrics and gynecology terms, TCM obstetrics and gynecology terms. See Ming Wanquan's "Women's Secret Branch Seeds" for details. Also known as planting jade, it refers to conception. 2. The term of experimental microbiology refers to the process of inoculating dormant production strains stored in sand tubes and freeze-drying tubes into test tubes for activation, and then gradually expanding the culture through flat bottles or shake bottles and seed tanks to obtain a certain number and quality of pure species. These purebred cultures are called seeds. 3. Sports vocabulary In order to prevent talented players from being discovered for various reasons, a special system has been established, that is, some powerful players do not participate in the first few games, and then participate in the next few games. These players are called seed players. 4. The seed of new network vocabulary, BT(BitTorrent) download term, the seed is an image metaphor. In a sense, the principle of BT download is like planting a seed in spring and snowballing like a million grains of rice in autumn. So people call the person who sends out the downloaded file a seed. The seed file is an index file, which records the storage location, size, download server address, publisher address and other data of the downloaded file. This seed file is not downloadable, but to download the target file, you must download the seed file first. The format of the seed file is *.torrent, and the seed is for users who provide you with downloads. The number of seeds in this file is how many users upload while downloading. BT refers to the person who provides the complete file as the seed and the person who downloads it as the client. How many seeds a file has can now be seen by many customers. As long as there are seeds, you can download them with confidence, and you must seize them. Of course, the more seeds there are, the more customers there are, and the faster you can grasp the documents. To use seeds, you must have BT software before you can download it! BT first divides a file into z parts in the uploader. A downloads the N part randomly on the server side, and B downloads the M part randomly on the server side, so that A's BT will go to B's computer to get the M part downloaded by B, and B's BT will go to A's computer to get the N part downloaded by A according to the situation, which not only reduces the load on the server side, but also accelerates the download speed of users (A and B) and improves the efficiency. For example, if C wants to connect to the server to download, it may be only a few K, but it will be much faster if it goes to A and B's computers. So the more people use it, the more people download it, and the faster everyone will be. This is the advantage of BT. Edit the classification of seeds in this paragraph: endosperm seeds, which are composed of seed coat, embryo and endosperm. Seeds of castor, tobacco, tomato and persimmon in dicotyledonous plants and wheat, rice, corn, sorghum and onion in monocotyledonous plants all belong to this type. (1) Dicotyledonous seeds with endosperm Taking castor seeds as an example, the structure of these seeds was illustrated. The seed coat of castor seeds is hard, smooth and patterned. One end of the seed has a spongy protuberance, called a seed mound, which is formed by the extension of the seed coat and has absorption effect, which is beneficial to seed germination. The embryo is covered by mound, and the hilum is not obvious. In the center of the ventral surface of the seed, there is a long ridge, almost as long as the seed. Peel off the seed coat and you can see the white endosperm. Endosperm accounts for most of the seed volume. Contains a lot of fat. The embryo is surrounded by endosperm, and its two cotyledons are large and thin, with obvious veins on them. At the base of the two cotyledons, there is a short hypocotyl, which connects the embryo, radicle and cotyledon. The embryo is above the hypocotyl and the radicle is below. The seeds of tomato also belong to dicotyledonous plants and have endosperm seeds. (2) Taking wheat seeds as an example, the structure of endosperm seeds of monocotyledonous plants was explained. On the outside of wheat seeds or brown rice, in addition to the seed coat, there is also a peel combined with it. The pericarp is thicker and the seed coat is thinner, which is not easy to separate. Botanically, it is called caryopsis. The position of embryo and endosperm can be clearly seen from the longitudinal section of wheat grain (the middle section can be made through abdominal groove). In the pericarp and seed coat, most of them are endosperm, and the embryo is very small, only on one side of the seed base. Wheat endosperm can be divided into two parts, the outer layer is aleurone layer containing a lot of aleurone grains, and the inner layer is endosperm cells rich in starch. Embryo is very small and consists of embryo, hypocotyl, radicle and cotyledon. The germ is above, the radicle is below, and the middle is connected by a short hypocotyl, which is called shield. On the side near the endosperm, there is a layer of columnar epithelial cells arranged neatly. When seeds germinate, they can secrete enzymes, decompose nutrients stored in endosperm and transport them to embryos for utilization. The embryo is composed of several growing cones surrounded by young leaves, and the outer color of the embryo is covered with a complete sheath called coleoptile. The radicle located below the hypocotyl is covered by a sheath called radicle sheath, which plays a protective role. This kind of seed consists of seed coat and embryo. Seeds of dicotyledonous plants, such as peanuts, cotton, beans, melons and oranges; Seeds of monocotyledonous plants, such as arrowhead and Alisma orientalis. Monocotyledon seeds without endosperm are rare in crops. A seed that consists of a seed coat and an embryo and lacks endosperm. Seeds of dicotyledonous plants such as soybean, peanut, broad bean, cotton, rape and melon, and monocotyledonous plants such as arrowhead and Alisma orientalis all belong to this type. Take the seeds of Vicia faba and Sagittarius as examples to explain the structure of endosperm-free seeds of dicotyledonous plants and monocotyledonous plants. 1. structure of broad bean seeds: the seed coat of broad bean is green, hard when dry, and becomes soft after soaking in water. The hilum is black, eyebrow-shaped, located at the wide end of the seed, and the ridge is short and inconspicuous. Peeling off the seed coat, you can see two thick, flat and relatively superimposed white fleshy cotyledons, which occupy the whole volume of the seed. On the overlapping side of cotyledons, there is a small conical structure connected with two cotyledons, which is the radicle. Separate the overlapping cotyledons, and you can see another small structure connected with the radicle sandwiched between two leaflets, which looks like several young leaves. This is an embryo. There is also a short hypocotyl connection between radicle and embryo, and two cotyledons are directly connected with hypocotyl. 2. Sagittarius Sagittarius seed structure: Sagittarius Sagittarius seed is very small, wrapped in a flat triangular achene, and each fruit contains only one seed. Seeds consist of seed coat and embryo. The seed coat is extremely thin, with only one layer of cells. The embryo is curved, and the top of radicle is close to the end of cotyledon. Cotyledons are long and cylindrical, one piece is inserted on hypocotyl, and its base is covered by embryo. The germ has a growing point and forms a primary leaf. The radicle and hypocotyl are connected to form the short axis of the embryo. The so-called self-propagation of this paragraph is the self-propagation of plants, which does not depend on other media. The fruit or seed itself has weight, and when it matures, it will fall directly to the ground due to gravity, such as persimmons and olives. However, some capsules and pods will produce ejection force when the fruit is ripe and cracked, which will eject the seeds, such as five-core stone. The propagation distance of self-propagating seeds is limited, but some self-propagating seeds will spread twice after landing. Birds, ants and mammals are all possible secondary communicators. Wind propagation Some seeds grow wings or feather-shaped appendages and fly in the wind. Most of the seeds with pinnate appendages are herbs, such as yellow quail in Compositae, and woody plants are willow and kapok. In addition, the ratio of surface area to weight of some tiny seeds is relatively large, so seeds can be scattered with the wind, such as orchids. The achene of Taraxacum mongolicum, a compositae plant, opens its crown like a parachute when it matures, and flies with the wind, spreading its seeds to far places. Water-borne seeds (such as water lilies) whose surface wax is not in contact with water have air cells in their skin, whose specific gravity is lower than that of water, and can float on the water surface and spread through streams or ocean currents. The seed coat of such seeds is often rich in fiber, which can prevent the seeds from rotting or sinking due to soaking and water absorption. Coastal plants, such as chessboard feet, lotus leaves and olive seeds, have typical water-borne seeds. Birds spread the seeds spread by birds, most of which are fleshy fruits, such as berries, drupes, hidden flowers and fruits. Birds peck at the seeds of Lauraceae and spit them out. After the fruit is eaten, the seeds pass through the digestive tract and are excreted at will. Plants that spread seeds by birds are a relatively advanced group, because birds spread seeds farthest in all ways. Ants spread ants usually play the role of secondary disseminators in seed spread. Some birds eat and spread seeds, but they don't consume all the nutrients. Some nutrients will be left on the surface of seeds that fall to the ground for ants to eat. At this time, ants become second-hand communicators. The above phenomenon also occurs in seeds spread by themselves or mammals. Most of the spread of mammals belongs to some medium and large fleshy fruits or dried fruits. Generally speaking, mammals are relatively large and need a lot of food, so they will choose some big fruits. For example, macaques like to eat the fruits of persimmons and bananas and help these plants spread. After the seeds mature, most of them will automatically fall near the plants, and their growth space will be affected to some extent. So they will spread their seeds far away in various ways, which can be roughly divided into the following ways: 1. Spread by the wind: some seeds or fruits will grow hair, and when the wind blows, they will float to far places, such as dandelion, blackboard tree and Showa grass. 2. Using animals to spread: If you walk in the grass, the seeds or fruits of many plants will stick to clothes or trousers, or to other animals, or to animal foods such as Bidens bipinnata, Ficus, and Plantago. 3. Spread by elasticity: Mature fruits will crack when touched lightly, and seeds will be ejected by the elasticity of pericarp, such as impatiens, Bauhinia, Bauhinia and so on. 4. Spreading by water: Plants growing near the water usually spread their seeds by water, such as water lilies. Storage and preservation of medicinal seeds is a key measure to ensure a bumper harvest in the coming year. Years of experience show that drug farmers and other seed managers should master the following storage techniques in addition to conventional storage methods to ensure the germination rate of medicinal seeds and prepare for the production of medicinal materials in the next season. First, turn off the water. Before storage, it should be dried repeatedly in sunny days to control the water content of oil-rich medicinal materials at 8% ~ 9% and that of common medicinal materials at 12% ~ 13%. The second is to control the purity. Fine varieties of medicinal materials should be collected, single, dried and stored separately. When drying, it should be dried in a single field, not in the same field with other varieties to prevent mixing. Combined with air drying, thoroughly remove stems, leaves, weeds, silt, scraped seeds, broken seeds of insects, moldy seeds and other sundries. Storage rooms should be disinfected regularly to prevent drugs from being contaminated. The label on the storage time scale indicates the seed name, weight, purity, storage time, etc. The third is to keep it safe. When storing a large number of drugs, we should choose a special warehouse with clean, dry, heat insulation, ventilation and moisture-proof conditions. Before medicinal seeds are put into storage, other seeds, garbage and other sundries in the warehouse should be cleaned, disinfected with 10% limewater, and pesticides should be used to kill pests and rats in the warehouse. Medicinal seeds should be stored far away from the stove, not in flour mills, oil plants and other places, but in the warehouse where other grain varieties, cotton seeds, agricultural tools and other things are stored, special places can be set up for storage. The seeds are packed in sacks. Do not mix seeds with ammonia nitrogen fertilizers or pesticides such as ammonium carbonate and urea in a room. The fourth is to turn off the temperature. Drugs should not be overexposed, and seeds should not be dried on cement floor and iron plate. The dried seeds are cooled at night and put into storage. The temperature of the warehouse for storing medicinal seeds should be kept below 20℃, and the bulk seeds should be inserted with ventilated straw handles. The fifth is to turn off the humidity. Drugs should be stored in a dry and ventilated place. On the ground, bricks or logs are used to cushion the height of more than 50 cm, and containers of Chinese medicine seeds are placed in turn. The seed bag can't be placed directly on the ground, 30 cm away from the wall to avoid getting wet. Seeds should be often aired and ventilated in time during storage. The sixth is to prevent rats and insects. If the number of seeds stored is small, you can choose cement pots and porcelain pots for storage. During storage, check regularly. If pests are found, use 1 tablet of aluminum phosphide every 200 kg, wrap it with cloth, put it in a seed bag and seal it for 7 days. You can also spray pyrethroid insecticides, or put 1 ~ 2 aluminum phosphide particles in each bag when the seeds are bagged. Seventh, control management. Check the temperature and humidity during storage. Check 1 time every week in the initial stage of warehousing, 1 time every day in the middle stage and 1 time every 20 days in the later stage. When it is found that the seeds absorb moisture or the temperature is too high, they should be ventilated in time to prevent dampness and disperse dampness. If the problem cannot be solved, it must be dried and put into storage when the water content reaches the standard. Pay attention to fire prevention during the whole storage period. If there is no warehouse condition, the seeds should be stored outdoors, the ground should be surrounded by plastic sheets, tied with ropes, and the four corners should be pressed to prevent rain and snow from getting wet and strong winds from blowing.