Increase Spring Maize Yield and Grasp Fertilization Methods Scientifically

Spring maize has high yield per plant, strong plant and strong lodging resistance, but it grows slowly at seedling stage. If it encounters high temperature and rainy weather, it is easy to infect diseases and affect yield. To make spring maize high and stable yield, scientific fertilization methods must be mastered.

corn

Organic fertilizer should be widely applied. The yield of spring maize is closely related to soil fertility. In the fertilization measures of high and stable yield of spring maize, it is necessary to widely apply organic fertilizer, which can improve soil fertility. Generally, the input amount of organic fertilizer per mu should be higher than 4000 kg.

Nitrogen fertilizer should be applied steadily. Spring corn yield good base fertilizer should be applied well, adjust topdressing dosage. In high-yield fields with a corn yield of more than 500 kg, nitrogen fertilizer application per mu should be stabilized at 9~12 kg; in middle-yield fields with a corn yield of 300~500 kg, nitrogen fertilizer application per mu should be stabilized at 7~10 kg; in low-yield fields with a corn yield of less than 300 kg, nitrogen fertilizer application per mu should be stabilized at 6~8 kg. At the same time, the application period and method of nitrogen fertilizer should be adjusted reasonably to improve the utilization effect of nitrogen fertilizer.

Phosphorus fertilizer should be controlled. At present, the utility of phosphorus fertilizer has been generally recognized by people, but the application amount of phosphorus fertilizer should be reasonably determined and controlled according to the available phosphorus content of soil. In the fields with low, medium and high maize yields, the appropriate amount of phosphorus fertilizer applied per mu should be controlled in the range of 5 kg, 6 kg and 7 kg respectively. Phosphorus fertilizer is generally used as base fertilizer for planting spring maize.

Potassium fertilizer should be added. With the decrease of available potassium content in soil year by year, the area of potassium-deficient soil is expanding continuously, and potassium is essential for corn growth, so potassium fertilizer must be increased comprehensively. The suitable application rates of K fertilizer in high yield field, middle yield field and low yield field are about 8kg, 7kg and 6kg per mu respectively. The ratio of N, P and K fertilizer should be 1∶0.5∶0.6.

Microelement fertilizer should be applied. The deficiency of trace elements in soil leads to zinc deficiency in maize. Supplementary zinc fertilizer for corn can be applied in the aspects of seed soaking and coating of corn, 1~2 kg zinc sulfate can also be applied generally when corn is seeded or top dressing at seedling stage, zinc fertilizer can also be added to corn special fertilizer or foliar spray at seedling stage of corn.