2. Phosphorus: Wheat is sensitive to phosphorus. Early phosphorus nutrition is very important for the growth of plants and roots, and it is the key period of phosphorus nutrition in wheat. Phosphorus fertilizer can significantly increase the number of tillers and secondary roots and improve the cold resistance at seedling stage.
3. Potassium: The absorption peak of potassium is at the jointing and booting stages of wheat. Topdressing potassium fertilizer at jointing and booting stage can increase root quantity, make stems stout, prevent premature senescence of leaves at later stage, and increase grain weight and protein content.
4. Others: The normal growth of wheat also needs trace elements such as calcium, magnesium, sulfur, boron and manganese. When the soil supply is insufficient, the effect of applying corresponding fertilizer is obvious. Applying sulfur-containing fertilizer to sulfur-deficient soil can improve flour quality. When the soil is short of boron, the development of male organs of wheat is blocked, but it blooms and bears fruit normally after boron application.
Extended data:
growing environment
Deep soil layer, good structure and deep tillage layer are beneficial to water storage and fertilizer conservation and promote root system development. Soil structure refers to the proportion of solid (organic and inorganic), liquid and gas, which is closely related to soil moisture, air, temperature and nutrients. For example, sandy soil and heavy clay have poor structure and are difficult to form high yield.
The average daily temperature of winter varieties is 16 ~ 18℃, semi-winter varieties are 14 ~ 16℃, and the elasticity is 12 ~ 14℃. Temperature and air are affected by geographical latitude and altitude, that is, the higher latitude and altitude, the lower temperature and the earlier sowing date.
Wheat crops with long sunshine time (8 to 12 hours per day), if the sunshine conditions are insufficient. Can't pass the light stage, can't knot, can't bear fruit. The photoperiod of wheat is after vernalization.
References:
Baidu encyclopedia-wheat