Skillful application of aphid fertilizer is one of the most important technical measures for increasing production of mulch corn: First, from the point of view of corn fertility and demand, according to experiments, the absorption of nitrogen in maize seedling stage accounts for only 2.1% of total nitrogen uptake; At the booting stage, the absorption amount was 32.2% of the total; the male flowering absorption accounted for 18.9% of the total; the grain filling stage accounted for 46.7% of the total. It shows that the amount of fertilizer needed in the middle and late growth of corn accounts for more than 60% of the total amount. Second, judging from the fertility and physiological characteristics of maize, from the big bellmouth to the milk ripening stage, the photosynthesis efficiency is the highest during the lifetime of corn. At this time, the photosynthetic products are mainly used to produce grain and 80-90% of the grain yield per spike. It is formed after flowering of corn. If nitrogen is insufficient at this time, it will affect the synthesis and transfer of carbohydrates, and it will not be able to pollinate normally. At the same time, the functional period of the leaves will be shortened, leading to premature aging, marked increase in pods, balding, and lack of grain. Low, and mulching corn cultivation generally put most of the fertilizer as a basal fertilizer, corn growth in the middle and late period when the soil has no more nutrients left, must be used to make up the nutrient requirements of corn growth and development. Therefore, it is an effective technical measure to obtain stable production and high yield of corn.
The application method of attacking manure fertilizer should be carried out 7-10 days before tasseling. The quick-acting nitrogen fertilizer is the main method. Generally, the urea 8-10 kilograms or ammonium bicarbonate 20-25 kilograms can be applied in the mussels, which can be 10 cm away from the roots of the plants in the maize plants. Deepen the cave by about 10 centimeters. Apply the fertilizer to the hole and cover the soil. At the same time, we must also do a good job in preventing and controlling diseases and pests to ensure a bumper yield.
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