Method for regulating yield and growth shape of rice by virtue of water-fertilizer coupling

Abstract

The invention belongs to the technical field of rice growth and discloses a method for regulating yield and growth shape of rice by virtue of water-fertilizer coupling. The method comprises the following steps: analyzing influences of different water management modes and different fertilizer treatments on the water utilization rate and fertilizer utilization rate of the rice, and acquiring water and fertilizer saving mechanisms; analyzing the influences of the water-fertilizer coupling on growth and development of rice, yield and rice quality; analyzing the influences of different water treatments and fertilizer treatments on the plant height, tiller number and physiological indexes of the rice, as well as change mechanisms of the yield and quality, and obtaining correlation between the yield and the quality. When the nitrogen application rate reaches 180kg / ha and the irrigation amount reaches 1319.5m<3> / ha, an excellent water-fertilizer coupling mode is achieved. According to the method disclosed by the invention, high yield can be achieved, and high nitrogen agronomy efficiency, water utilization efficiency and irrigation water utilization efficiency are maintained.

Description

technical field [0001] The invention belongs to the technical field of rice growth, and in particular relates to a method for regulating rice output and growth shape by water and fertilizer coupling. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Rice is the food crop with the largest planting area and production volume in my country, and it is also the crop with the largest water consumption. At present, its water consumption accounts for about 54% of the country's total water consumption and more than 70% of the total agricultural water consumption. Water and fertilizer are the main limiting factors affecting its growth and development. The impact of nitrogen fertilizer on rice production is second only to water, and China has become the world's largest consumer of nitrogen fertilizer. In the traditional rice production, due to the water and fertilizer management mode of "big water and big fertil...

AI Technical Summary

Problems solved by technology

At the same time, a large number of seepage and runoff in the field not only cause the loss of nutrients in the farmland, but also cause water pollution.

[0009] (2) With the improvement of rice yield level, the amount of nitrogen fertilizer application is increasing, resulting in the decrease of nitrogen fertilizer use efficiency and a large amount of nitrogen loss, which directly and indirectly lead to a series of adverse environmental reactions

[0010] (3) In the prior art, the accuracy of rice growth information acquisition is poor

[0011] Difficulty in solving the above technical problems: Most of the previous studies focused on the single-factor effects of water or fertilizer, and there were few studies on the effects of water-fertilizer dual factors on rice.

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