High-yield cultivation method based on corn carbon and nitrogen metabolism difference

Abstract

The invention relates to a high-yield cultivation method based on a corn carbon and nitrogen metabolism difference. The method comprises the following steps: 1, determining a carbon and nitrogen metabolism type from a nitrogen sensitive type, a carbon and nitrogen coordination type, a vigorous nitrogen metabolism type and a weak carbon metabolism type based on a genotype difference presented by coordination of corn variety carbon and nitrogen metabolism; 2, specific to different carbon and nitrogen metabolism types, adopting different fertilizer applying measures: (1) for the nitrogen sensitive type, dressing urea at a nutrient growth and reproduction growth stage of corn, wherein the total amount of applied pure nitrogen is less than or equal to 360kg / ha; (2) for the carbon and nitrogen coordination type, controlling the total amount of applied pure nitrogen at 200-240kg / ha; (3) for the vigorous nitrogen metabolism type, applying a pure fertilizer in an amount of 240-320kg / ha; (4) for the weak carbon metabolism type, dressing urea at the nutrient growth and reproduction growth stage, wherein the using amount of pure nitrogen needs to be controlled at 240-320kg / ha. By adopting the high-yield cultivation method, seeds are selected scientifically, fertilization is optimized, and corn physiological metabolism is coordinated in order to increase the nutrient utilization rate, lower environmental pollution and improve the yield and quality of the corn.

Description

Technical field [0001] The invention belongs to the technical field of crop cultivation, and specifically relates to a high-yield cultivation method based on the difference in corn carbon and nitrogen metabolism. Background technique [0002] Corn is China's largest food crop and a key crop related to the country's food security. China's corn production increased from 62.6 million tons in 1980 to 20.12 million tons in 2012, with an average annual output increase of 3.6%. For more than 30 years, China's corn production growth has contributed 50% of the planting area and unit yield. Among them, the average annual growth rate of corn yield is 1.7%, and the average annual growth rate of area is 1.9%. However, looking at the situation in the past 10 years, the growth of China's corn production depends more on the increase in area, and only 30% comes from the increase in yield. From 2003 to 2012, the average annual growth rate of corn production in China was 5.95%, the average annua...

AI Technical Summary

Problems solved by technology

This high-input, high-yield cultivation method has made a great contribution to the increase of my country's grain production. However, this cultivation method has caused a certain degree of damage to the ecosystem and the environment while obtaining high yield; In addition, excessive fertilization causes excessive accumulation of nitrate in crops, which will also cause a decline in crop quality and fertilization benefits, and even cause a decline in yield.

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