Compound fertilizer for double-season early rice in south-central China and application of compound fertilizer

Abstract

The invention discloses a compound fertilizer for double-season early rice in south-central China and the application of the compound fertilizer. The compound fertilizer comprises a nitrogen fertilizer, a phosphate fertilizer, a potassium fertilizer and an NAM combination inhibitor, wherein the mass fraction A of the nitrogen fertilizer in the compound fertilizer is 20 to 30 percent based on a nitrogen element; the mass fraction B of the phosphate fertilizer in the compound fertilizer is 9 to 15 percent based on phosphorus pentoxide; the mass fraction C of the potassium fertilizer in the compound fertilizer is 7.5 to 12.5 percent based on potassium oxide; and the mass fraction D of the NAM combination inhibitor in the compound fertilizer accords with an equation of (A+B+C):D=40:(0.5-0.7). An application method for the compound fertilizer comprises the following steps of: basically applying the compound fertilizer according to the fertilizing amount of 24 to 30kg / mu; cultivating with water after the fertilizer is applied to ensure that the compound fertilizer is fully mixed with soil; and dressing urea according to the fertilizing amount of 2.5 to 7.5kg / mu in a seedling establishment period of the rice. The compound fertilizer has a scientific formula, high fertilizer efficiency and a high nutrient utilization rate, is safe and environment-friendly and is convenient to apply.

Description

technical field [0001] The invention relates to the field of agricultural fertilizers, in particular to a compound fertilizer for early rice and its preparation method and application. Background technique [0002] my country is a big rice producing country. Rice in my country is mainly distributed in subtropical regions, with Hunan and Jiangxi having the largest total rice area and double-cropping rice area. Based on national food security requirements and high grain production goals, the amount of organic fertilizers has decreased sharply, while the amount of chemical fertilizers has continued to increase. Blind fertilization leads to a decrease in fertilizer efficiency, an increase in food costs, and an increase in the loss of fertilizers to the environment, leading to serious agricultural non-point source pollution. Many economically developed regions in my country, such as Taihu Lake, Chaohu Lake, and Dianchi Lake, have caused serious eutrophication problems. The Bull...

AI Technical Summary

Problems solved by technology

Although the inhibitor has a certain effect of prolonging the efficiency of nitrogen fertilizers, how to compound it with existing nitrogen, phosphorus and potassium fertilizers in agricultural production has always puzzled those skilled in the art.

In addition, although the inhibitor can prolong the nitrogen fertilizer effect, the release time of the nitrogen fertilizer effect is not uniform, and the growth time of the double-cropping early rice field in the central and southern regions is generally 60-70 days, and its demand for nitrogen is 45-50 days, so It is not that the longer the release time of nitrogen fertilizer effect is, the better. In order to develop a compound fertilizer suitable for the growth of double-cropping early rice fields in the central and southern regions, it is necessary to recombine the inhibitor with the existing nitrogen, phosphorus and potassium fertilizers. Optimal selection of NPK fertilizer raw materials has always been a long-term and arduous task for those skilled in the art

In addition, after transplanting double-cropping early rice in the central and southern regions, the temperature is low and the release of soil nutrients is slow. After the release of nitrogen in the compound fertilizer is inhibited, a certain amount of other special fertilizers must be considered to better meet the needs of early rice seedlings. Growth needs, and these problems have not been effectively solved in the existing technology

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