A method of topdressing nitrogen fertilizer according to soil water potential and rice variety type

Abstract

A method for topdressing nitrogen fertilizer based on soil water potential and rice variety type, which belongs to the field of agricultural technology, uses the interaction effect of soil moisture and nitrogen, and has different responses to soil moisture and nitrogen according to different rice genotypes or variety types. Fertilization is carried out according to the soil moisture status and rice variety type to achieve a synergistic increase in crop yield, water and nitrogen use efficiency. The method is scientific and reasonable. Compared with the conventional nitrogen fertilization method, the present invention determines the nitrogen fertilization at the tillering stage, the initial stage of ear differentiation and the flower differentiation stage according to the different growth stages of rice, different soil water potentials and the types of japonica rice varieties, indica rice varieties and hybrid rice varieties. volume ratio. It solves the problems of unfavorable impact on rice yield and low water and nitrogen use efficiency caused by the mismatch between topdressing nitrogen fertilizer and soil moisture and variety types, effectively improves rice yield and water and nitrogen use efficiency, and makes rice yield and irrigation Water productivity increased by 6.36% to 12.05%, nitrogen fertilizer productivity increased by 9.21% to 21.46%.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and relates to a method for topdressing nitrogen fertilizer after transplanting rice, in particular to a topdressing method for realizing synergistic improvement of rice yield and nitrogen fertilizer use efficiency according to soil water potential and rice variety type. method of nitrogen fertilization. Background technique [0002] Moisture and nitrogen are the two most important factors that determine crop yield, and they are also the most frequently regulated and most influential crop growth environmental factors. There is a significant interaction effect between the two on crop yield and water and nitrogen use efficiency. Under the condition of unrestricted water and nitrogen supply, the effects of water and nitrogen on crop yield and quality are optimally matched or coupled in terms of quantity and time. Under the condition of water deficit, nitrogen is the activator to develop the ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is in order to overcome the deficiencies in the prior art, propose a kind of method according to soil water potential and rice variety type topdressing nitrogen fertilizer, by according to different growth period of rice, different soil water potential and japonica rice variety, indica rice variety and hybrid rice variety type Determining the proportion of nitrogen application at the tillering stage, initial panicle differentiation stage, and spikelet differentiation stage can solve the adverse effects on rice yield and low water and nitrogen use efficiency caused by the mismatch between topdressing nitrogen fertilizer, soil moisture and variety types. question

Images