Abstract:

At present, some farmers use the “one bombardment” fertilization method in the early stage of maize, resulting in insufficient nutrient supply in the later stage of maize growth and premature aging, and affecting yield. Most farmers are used to sprinkling urea-based fertilizers as topdressing ear fertilizer one time at the big flare stage of maize. This practice requires good field moisture or irrigation conditions or rainy days, which are difficult to unify. In recent years, maize slow-release fertilizer has been popularized to solve this problem, but it needs to increase the amount of base fertilizer, so studying the techniques of topdressing ear fertilizer application for yield increase is particularly important. Therefore, in the middle and later stages of maize growth and development, an experimental study on ear topdressing fertilizer application was carried out at the same time with pest control. UAV spray plant regulators, new foliar fertilizers, pest agents and other new scientific and technological product combinations were applied to replace urea topdressing ear fertilizer at the same growth and development stage, to reduce the amount of chemical fertilizer, save labor and reduce labor intensity, increase chlorophyll content, prolong the duration of green leaves, enhance plant dry matter accumulation, thereby increasing maize yield and efficiency.

Key words: maize, ear fertilizer, substitutions, combination of fungicide and fertilizer, spray test, increase yield and efficiency