A kind of high-efficiency secondary fertilization method for rice

Abstract

The invention discloses an efficient secondary rice fertilization method, comprising: determining rice nitrogen fertilizer usage according to practical soil fertility of a rice field, applying an application ratio of the nitrogen fertilizer, applying base fertilizer during deep plowing, and applying ear fertilizer; applying the base fertilizer twice, with first application after in after plowing, applying 70% of the base fertilizer into plowed furrows, carrying out rotary cultivation to mix the fertilizer with topsoil, irrigating with shallowly after rotary cultivation and raking flatly, applying the remaining 20% of the fertilizer to the rice field after first raking, and carrying out second raking; applying once or twice nitrogen ear fertilizer, 40% of urea and 60% of sustained release fertilizer.The high-yield efficient double-fertilization method of Indica rice and Japonica rice hybrids is innovatively provided herein, and the base fertilizer is distributed reasonably in the topsoil; the nitrogen fertilizer is applied fewer times, the base fertilizer and the ear fertilizer are applied twice separately, the usage of nitrogen fertilizer is reduced, 2-4 kg of nitrogen fertilizer is averagely applied per mu, nitrogen fertilizer utilization is increased by 15%, and the yield of Indica rice and Japonica rice hybrids is increased by about 5%.

Description

technical field [0001] The invention belongs to the technical field of crop fertilization, and in particular relates to a high-efficiency secondary fertilization method for rice. Background technique [0002] The contribution rate of chemical fertilizers to crop yield is between 40% and 60%, and the application of chemical fertilizers is the most important technical measure to increase rice production. However, unreasonable fertilization often results in low nutrient utilization efficiency, which not only affects the economic benefits of fertilization, but also causes excess nutrients to be lost with water, which may become a potential source of pollution. In agricultural production, traditional fertilization is applied by farmers or major grain growers according to the growth period of rice. Generally, nitrogen fertilizer is mainly divided into 3-4 phases, that is, the application of base fertilizer before transplanting, the application of tiller fertilizer after 5-7 days o...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method of high-efficiency secondary fertilization of rice, which aims to solve the problem of traditional fertilization with a large amount of fertilization, many times, short intervals between base fertilizer and ear fertilizer, resulting in increased ineffective tillers, a large amount of nitrogen fertilizer loss, serious pests and diseases, and easy problems such as lodging

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