Optimized fertilization method for winter rape

Abstract

The invention discloses an optimized fertilization method for winter rape. The optimized fertilization method comprises the following steps: 1) determining the target yield of the winter rape in a target area according to the recent three-year output in the target area; 2) determining the soil nutrient supply grade and the winter rape fertilization yield response as well as the agronomic efficiency; 3) calculating in combination with the target yield, the yield response, the agronomic efficiency and the soil nutrient supply grade to obtain the recommended fertilization amount of nitrogen, phosphorus and potassium required by the winter rape to obtain the target yield; 4) fertilizing soil according to the recommended fertilization amount of the nitrogen, the phosphorus and the potassium. The fertilization method is suitable for a winter rape rotation planting area in the Yangtze River Basin of China; the recommended fertilization method obtained by calculation has the characteristic ofbeing highly-targeted, and can effectively improve the yield of the winter rape and improve the fertilizer utilization rate and the economic efficiency.

Description

technical field [0001] The invention relates to a method for optimizing fertilization of winter rapeseed. Background technique [0002] Winter rapeseed is the most common crop planted in the Yangtze River Basin, and it is also the only oil crop in my country that does not compete with food crops for land. At present, the annual planting area is 7 to 8 million hectares, and about 60% of the domestically produced edible vegetable oil comes from rapeseed. Therefore, Increasing the yield of rapeseed is an important measure to ensure the safety of edible oil in our country and meet the living needs of the people. [0003] In rapeseed planting and production, fertilization is the most important production measure in cultivation. According to research, if no fertilization is applied, the yield of rapeseed will be reduced by 50-60% or even more, and the contribution rate of fertilization in high-yield rapeseed planting has exceeded 50%. , significantly higher than that of other crop...

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Problems solved by technology

At the same time, according to the survey, in the cultivation of rapeseed, the cost of fertilization has accounted for about 60% of the total direct investment in rapeseed planting. The high cost of fertilizer input has become an important factor restricting farmers' income from planting rapeseed.

The research also shows that the fertilizer utilization rate of winter rape in my country is low, and the average utilization rate of nitrogen, phosphorus, and potassium fertilizers that farmers are used to fertilizing is only 27.4%, 20.3% and 38.1%, which is caused by excessive fertilization and high fertilizer input costs. major factor, with low fertilizer use efficiency and possible environmental risks

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