Among the three factors of wheat yield (the number of ears per pan, the number of grains per panicle, and the 1000-grain weight), the most common factor affecting yield is the number of panicles per mu (because of the grain number per panicle and the 1000-grain weight of a wheat variety, it is relatively stable). Therefore, the main goal of wheat field management is to maximize the number of acres of panicles, that is, to strive for early tillering, multi-distribution, and cultivation of large salamanders, and to increase the tillering rate and increase the tillering rate. The supply of water and fertilizer in spring wheat fields has a great impact on tillering. It can be said that spring topdressing and watering is the most important measure to promote the transformation and upgrading of seedlings.
In the spring, after the soil is thawed, it is necessary to carry out topdressing and watering in time due to the seedlings, the ground, and the timely conditions, to meet the demand for nutrients and water for wheat growth and development, and to maximize the tillering into ears. The order of water and fertilizer management in wheat fields is: first pouring the dry wheat, then pouring the general second-class wheat, and finally pouring the high-yielding first-class wheat and three-type wheat weak seedlings. The second type of wheat is topdressed and watered during the rising period (the weaker the seedling, the earlier the topdressing and watering; the more the seedling is, the later it should be). A type of wheat is watered in the middle of the dialing period (when the first section of the base will be basically set). The average mu is about 15 kg of urea, and the water is 50 to 60 square meters. If the phosphorus fertilizer is applied to the base fertilizer, it can be traced 7 to 10 kg of diammonium phosphate and 7 kg of potassium fertilizer. De-fermenting wheat fields and late-wedding weak seedlings can be applied twice in the greening stage and jointing stage. The effect of purifying diamine in the regreening period is better than purging urea. After the spring rain and watering, it is necessary to timely plough and break the board to protect the raft.
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