super absorbent resin is a kind of functional polymer material with particularly strong water absorption capacity. Non-toxic and harmless, it releases water and absorbs water repeatedly, so people in agriculture compare it to a "micro-reservoir". At the same time, it can also absorb fertilizers and pesticides and release them slowly, increasing fertilizer efficiency and drug effect. Super absorbent resin is widely used in agriculture, forestry, horticulture and building materials. In industry, it can be widely used in petrochemical industry, cable, paper making, sensors, fire extinguishers, fiber products, cosmetics, food preservation, expansion toys and so on. It can also be widely used in sanitary napkins, baby diapers, adult incontinence pads, health ice caps, ice mats, blood-sucking medicinal cloths and other fields in medical and health care. However, there are different products in various fields, such as industrial and medical products, which are not suitable for agriculture and forestry. When it is used in different fields, we should comprehensively consider its water absorption rate, water absorption time, water release ability, cycle action period and so on.
product features:
1. It is nontoxic, safe and environmentally friendly, nontoxic and tasteless, and does not pollute plants, soil and groundwater, fruit trees and flowers, afforestation, soilless culture, plant preservation and transportation, field crops, etc.
The final decomposition products of soil water retaining agent and soil erosion prevention agent are carbon dioxide, water, ammonia nitrogen and sodium or potassium ions without any residue.
2. Even under the condition of irrigation, it can still save more than 5% of water.
3. It can improve the soil structure, improve the sticky soil, leaky sandy soil and secondary saline-alkali soil, promote the development of soil microorganisms, and improve the recycling efficiency of soil organic matter.
4. It has a long service life. It integrates the characteristics of various polymers, can repeatedly absorb water to expand and release and contract, and can be used for more than 6 years in production. It is the longest-lived soil moisturizing product on the market at present.
5. It absorbs water quickly. Generally, the longest time for natural water to be saturated is about 15-4 minutes, and the fastest is .4 minutes.
6. The utilization rate of water and fertilizer is high. The "small reservoir" formed by land water-retaining agent in the soil is fertilized, and the trace elements lost by irrigation (or rainfall) are reduced by 1/3. When there is another drought, the water-retaining agent that absorbs enough water will keep the surrounding soil moist to supply water for plant roots. Even in desert areas and extreme drought climate, when the annual rainfall reaches 2mm, grass can be planted and trees planted.
7. The water-retaining agent that absorbs enough water will expand into hydrogel crystals, and even if it is close to plant roots, it will not rot.
8. Even in extreme drought, its performance is stable. It will not suck back the water of plants.
The main functions of water-retaining agent are:
1. Water-retaining agent is insoluble in water, but it can absorb hundreds of times its own weight. Water-retaining agent can effectively inhibit water evaporation. After water-retaining agent permeates into soil, it can greatly inhibit water evaporation, improve the saturated water content of soil and reduce the saturated hydraulic conductivity of soil, thus slowing down the speed of releasing water from soil and reducing the water content of soil.
2. Preserve fertilizer. Because the water-retaining agent has the function of absorbing and retaining water, it can fix the nutrients needed by crop growth, such as fertilizers and pesticides, which are dissolved in water, thus reducing the leaching loss of soluble nutrients to a certain extent, achieving the effects of saving water and fertilizer and improving the utilization rate of water and fertilizer.
3. Keep warm. The water-retaining agent has good heat preservation performance. After applying the water-retaining agent, The temperature at night can be adjusted by using the heat energy generated by the absorbed moisture to keep part of the daytime illumination, so that the temperature difference between day and night can be reduced. When .1% ~ .2% water-retaining agent is mixed in sandy loam, the temperature monitoring of 1 cm soil layer shows that it can buffer the rise and fall of soil temperature, reducing the temperature difference between day and night to 11 ~ 13.5℃, while the soil without water-retaining agent is 11 ~ 19.5℃. < P > 4, which is an improvement. With the regular changes of water absorption expansion and water loss contraction, the surrounding soil can be changed from compact to loose, and the pores are enlarged, thus improving the permeability of soil to a certain extent.
The application scope of water-retaining agent in agriculture:
1. Grass industry.
(1) Lawn: it is widely used in newly-built lawns: high emergence rate, fast turf formation, long moisturizing time and simple construction.
Method A: When preparing the soil, sprinkle the water-retaining agent on the broken soil surface in proportion (2-5g per square meter according to the soil type and moisture conservation), comb it with an iron harrow, mix well and level it, and fill it with water to wait for sowing
;
in method b, the water-retaining agent and grass seeds are mixed in the above proportion, but after sowing, they need to be covered with topsoil before they can be watered thoroughly. For example, in arid areas where irrigation is inconvenient, they should be dried or sprayed (dosage: emulsion .2-.4kg/ mu, dry powder .8-.15kg) to reduce water evaporation.
In method c, the water-retaining agent is applied to the lawn that has become flat. Proportionally, it shall not exceed 6-1g per square meter (it can be mixed with lawn fertilizer), and then the soil shall be loosened with iron harrow so that it can be fully and evenly combined with soil, and then it can be irrigated.
Method D: Highway slope protection, rock greening usually adopts high-pressure tanker spraying (this method is limited to use), and the dosage or collocation ratio shall be increased or decreased according to the nature of spraying carrier. The mixed spraying dosage is small and the cost is low. For slope protection (neutral sandy loam soil, for example), dry powder 6 is used per square meter.
the carriers of rock greening (also known as vegetation concrete) are mostly artificial concrete skeletons, and due to the constraints of nutrients and water resources, the mixing ratio is slightly increased by using 9-15g dry powder per square meter.
(2) Forage: In desert or harsh areas with annual rainfall less than 2mm, generally, relatively drought-resistant legumes are selected, and there are many varieties of compositae forage, so MP35S can be used for seed "moisturizing afterbirth". Grass is planted in mountainous areas and plains, and water-retaining agent is mixed with seeds for sowing, and irrigation is not needed when the annual rainfall is over 2mm.
2. Planting trees.
(1) Dipping roots —— According to the number of seedlings that need to be dipped in roots, stir the water-retaining agent into 3 liters of water (depending on the hardness of water), fully stir and dissolve it, and then soak the roots for transplanting (diluted roots can be added in proportion according to the root conditions of seedlings) In order to promote the growth of roots). If long-distance transportation is needed, wrap the roots with plastic film or seal them for fresh-keeping transportation to prevent dryness and improve the survival rate.
(2) Sprinkle the roots-when transplanting seedlings (in sandy land and sandy loam), backfill the mature soil to the roots of seedlings, sprinkle 15-25g/ plant with water-retaining agent, mix well with broken soil, and fill the soil with water. If the soil has strong viscosity, it is necessary to dig a large pit in proportion, backfill the sand mixed soil to 1cm below the seedling root, fully mix the water-retaining agent with the soil (preferably add a small amount of sand), backfill and compact, and cover the surface with soil.
(3), dig ditches and mix the soil-for trees over three years, dig ditches around about 2/3 of the vertical projection of their crown (25cm in width and no more than 4 in depth) Mix water-retaining agent with broken soil (adding water-retaining agent at .3‰), backfill, leave a groove after covering the soil, and cover the soil with water (it can be used after absorbing enough water in mountainous areas or other areas that can't be irrigated).
(4) When planting trees in desert, use water-retaining agent to swaddle directly. The transplanting method of big trees is the same as "2", and the number is increased in proportion. < P > Models and so on are different. How to choose a product with low cost and good effect among many water-retaining agents makes every user very concerned. Recently, from the feedback of users, we should pay attention to the following points when choosing water-retaining agents: 1. The service life of water-retaining agents is about 2 years. 2. The water absorption rate of water-retaining agent is usually above 3, but it will decrease with the increase of use time. 3. The water-retaining agent with starch as the main raw material will degrade automatically and will not cause harm to the environment. If the chemical raw material is used, there is no guarantee.
Development prospect of water-retaining agent:
Agriculture is the basic industry of human life. As an essential resource for agricultural production, the application of water in agriculture has become particularly important. At present, China has implemented the strategy of agricultural ecological environment construction, agricultural structural adjustment and the development of the central and western regions, focusing on popularizing water-saving technology in dry farming, and drought-resistant and water-retaining technology is an important part of it. High-energy water-retaining agent is a new technology product supported and developed by the national demonstration construction project of dry farming.