Optimized technique of fertilization of lagging nitrogen fertilizer for paddy rice in cold farmland

Abstract

An optimized fertilizer application technique for paddy rice in cold region features that the N fertilizer applied in early phase is decreased and the N fertilizer applied in later phase is increased for increasing yield and improving quality. The percentages of the N fertilizer applied in different stages are 45% for base fertilizer, 20% in early tiller stage, 15% for young ear differentiating stage and 20% for reduction division stage.

Description

(1) Technical field [0001] The invention relates to a method for fertilizing crops, in particular to a method for fertilizing rice in cold regions. (2) Background technology [0002] Rice is a major food crop. In 2005, the rice planting area in Heilongjiang Province reached 28 million mu, and there is a trend of further development. Rice production is closely related to my country's food security issues. Continuous improvement of rice fertilization technology is the main way to protect the fertility of black soil and increase and stabilize rice production. It is a key issue for sustainable agricultural development and an important guarantee for food security. [0003] Northeast my country is located in a cold region. Although the total nutrient content of the soil is high, due to the low temperature in the early stage, the traditional rice fertilization technology emphasizes the early growth and rapid development of tillers, and pays attention to early fertilization, especia...

AI Technical Summary

Problems solved by technology

In addition, agricultural technicians and rice farmers are worried that fertilization at the later stage will lead to greedy greens and late maturation, so they dare not apply fertilizer in the later stage of rice growth. This will cause insufficient nutrients in the later stage of rice growth, resulting in premature root senescence, reduced seed setting rate, lower thousand-grain weight, low yield, and poor rice quality. decline