水氮耦合对玉米生长及产量的影响研究进展

Research Progress on Effect of Water Nitrogen Coupling on Maize Growth and Yield

在农业生产中,水、肥是必不可少的元素,二者紧密相连但又彼此制约。水氮耦合可调节土壤对水分和养分的吸收,并实现水肥一体化管理模式,在保证水肥资源高效利用的同时提高作物产量。玉米是典型的需水量大、需氮量多的作物,在其关键生育期水氮供应不足会影响其光合作用,进而影响干物质积累,最终降低玉米产量,浪费农业资源。本文综述了水氮耦合对玉米干物质积累、光合作用、产量及构成因素、水肥利用效率的影响,以期为玉米合理灌溉及施肥提供指导。

In agricultural production,water and fertilizer are essential elements,which are closely connected but also mutually restrictive.The water nitrogen coupling can regulate the absorption of soil moisture and nutrients,and achieve an integrated management model of water and fertilizer,ensuring efficient utilization of water and fertilizer resources while increasing crop yield.Maize is a typical crop with high water and nitrogen requirements.Insufficient water and nitrogen supply during its critical growth period can affect its photosynthesis,thereby affecting dry matter accumulation and ultimately reducing its yield,wasting agricultural resources.This paper reviewed the effect of water nitrogen coupling on dry matter accumulation,photosynthesis,yield and composition factors and water fertilizer utilization efficiency in maize,so as to provide guidance for rational irrigation and fertilization of maize.