Weak seedlings and few seedlings of wheat should be fertilized to promote tillering.

After wheat tillers began, the tiller number increased with the growth and development of plants, and reached the maximum before and after jointing. After that, the tillers which occurred later died one after another due to lack of nutrients, and the number of tillers was basically stable after heading. Generally, tillers first rely on main stems and large tillers to supply nutrients after germination, and begin to produce nutrients after the first green leaves appear. At the same time, they also rely on large tillers and main stems to supply nutrients, and finally absorb and produce nutrients themselves. Usually, the tillers with more than 3 functional leaves and independent roots at the beginning of jointing stage of wheat are likely to form ears. When the field density is too high, the large tillers with more than 3 leaves at jointing stage often fail to form ears. Tillers that eventually fail to form ears are ineffective tillers.

Tillering of coleoptile node occurred when the main stem had 3 leaves, tiller of the first leaf node occurred when the main stem had 4 leaves, tiller of coleoptile node and tiller of the second leaf node occurred when the main stem had 5 leaves. The emphases of management in tillering stage of wheat were to promote roots and increase tillers, cultivate early and strong seedlings, ensure wheat seedlings to overwinter safely, and lay the foundation for full ears and big ears. The wheat in the above field just begins to tiller, the growth of wheat seedlings is weak, and the number of seedlings is not many. At this time, providing sufficient fertilizer can promote early tillering and rapid development, improve tillering rate and promote young ear differentiation. If the fertilizer supply is insufficient at this time, the wheat seedling body may be thinner and the tiller is insufficient, resulting in more ineffective tillers after winter, less effective panicles and low yield.

Some time ago, the soil was dry, so attention should be paid to the management according to the fertilizer dosage and soil moisture change in the early stage. When soil moisture increases after recent rainfall, wheat seedlings can absorb more nutrients and do not have to be in a hurry to fertilize. Field with insufficient base fertilizer should be fertilized early. Generally, urea 10 kg or ammonium bicarbonate 20~25 kg and potassium chloride 5 kg are applied per mu. Pay attention to irrigation and drought resistance to promote wheat seedling growth. In combination with fertilization, furrow irrigation is adopted. Water is irrigated to two thirds of the ditch depth, so that water can penetrate into the soil to prevent flood irrigation and long-term ponding in the field.