Methods of Nitrogen Regulation and Weight Loss Enhancement in Double Cropping Rice

A technology for nitrogen regulation and double cropping rice is applied in the agricultural field, which can solve the problems of low nitrogen utilization rate and difficult regulation, and achieve the effects of high fertilizer utilization rate, improved fertilizer utilization rate, and reduction of chemical fertilizer application amount.

Inactive Publication Date: 2011-12-21
INST OF SOIL FERTILIZER & RESOURCE ENVIRONMENT JIANGXI ACAD OF AGRI SCI +1
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Problems solved by technology

Nitrogen is one of the most active and difficult to regulate factors in rice production, and China adopts traditional Chine

Method used

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Embodiment Construction

[0025] The invention uses a hand-held chlorophyll meter (SPAD-502 type) to measure the SPAD value of the most sensitive leaf chlorophyll in the period when rice leaf color is most sensitive to nitrogen. The nitrogen nutrient status of rice is understood through the leaf SPAD value, and then the actual SPAD value of rice is classified into the threshold range of rice leaf color. According to the amount of application required for each leaf color threshold, the corresponding nitrogen fertilizer is applied within the required fertilization range, so that the nitrogen nutrient of rice returns to the high-yield leaf color threshold range. By this method, the rice leaf color is adjusted to be within the high-yield leaf color threshold range, and the rice yield will reach the local high-yield level when the rice is harvested.

[0026] The hand-held chlorophyll meter of the present invention must be produced in Japan (SPAD-502 type), if different types of chlorophyll meters are used, ...

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Abstract

The invention discloses a method for nitrogen regulation, weight loss and efficiency enhancement of double-cropping rice, which uses a hand-held chlorophyll meter (SPAD-502 type) to measure the SPAD value of the most sensitive leaf chlorophyll in the period when the rice leaf color is most sensitive to nitrogen . The nitrogen nutrient status of rice is understood through the leaf SPAD value, and then the actual SPAD value of rice is classified into the threshold range of rice leaf color. According to the amount of application required for each leaf color threshold, the corresponding nitrogen fertilizer is applied within the required fertilization range, so that the nitrogen nutrient of rice returns to the high-yield leaf color threshold range. Through this method, the determination of soil nutrient content in the early stage can be avoided, and the rice leaf color can be directly adjusted to make it within the high-yield leaf color threshold range. When rice is harvested, the rice yield will reach the local high-yield level, and the nitrogen use efficiency will increase by about 15%.

Description

technical field [0001] The invention relates to a method for nitrogen regulation and weight loss and efficiency enhancement of double-cropping rice, which belongs to the field of agricultural technology. Background technique [0002] Various nutrients needed by plants, nitrogen is particularly important. Nitrogen is a component of many important organic compounds in crops, such as proteins, nucleic acids, chlorophyll, enzymes, vitamins, alkaloids and some hormones all contain nitrogen. [0003] well known. Green plants depend on chlorophyll for photosynthesis, and both chlorophyll a and chlorophyll b contain nitrogen. Practice has proved that the nitrogen content of crops often has a significant positive correlation with the chlorophyll content of leaves, and the chlorophyll content often directly affects the rate of photosynthesis and the formation of photosynthetic products. When plants are deficient in nitrogen, the chlorophyll content in the body decreases, the leaves...

Claims

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Application Information

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IPC IPC(8): A01G16/00A01C21/00A01G22/22
Inventor 孙刚仇少君何萍周卫张文学刘光荣梁国庆
Owner INST OF SOIL FERTILIZER & RESOURCE ENVIRONMENT JIANGXI ACAD OF AGRI SCI
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