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

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...

AI Technical Summary

Problems solved by technology

Nitrogen is one of the most active and difficult to regulate factors in rice production, and China adopts traditional Chinese fertilization methods, and its nitrogen use efficiency is significantly lower than that of foreign countries by 10%-30%.