遇旱灌水和施肥对大豆产量及农艺性状的影响

Influence of Irrigation and Fertilization on Soybean Yield and Agronomic Characters under Drought Stress

于2008～2009年研究了遇旱灌水和不同施肥方式对大豆农艺性状和产量的影响。结果表明:遇旱灌水能显著提高大豆叶面积指数、生物产量、单株荚数、单株粒重和产量的不同施肥方式对大豆叶面积指数、生物产量、单株荚数、单株粒重和产量的影响表现为优化施肥>常规施肥>不施肥,并且灌溉条件下,不同施肥方式产量和产量相关性状差异更显著,表明灌溉在保证水份供应的同时,促进了肥料的吸收,起到了以水调肥的作用。

Water and fertilization are key factors affecting soybean yield. The present study was carried out to evaluate the influence of irrigation and fertilization on soybean yield under drought stress from 2008 to 2009. The results showed that irriga- tion significantly increased leaf area index, biomass, pod number, grain weight and seed yield under drought and arid years; effects of different fertilization patterns on soybean leaf area index, biomass, pod number per plant, grain weight per plant and yield showed that optimized fertilization 〉 conventional fertilization 〉 no fertilizer. Moreover, under irrigation condition, the effects of different fertilizer application methods to yield and yield characters were much more remarkable, which indicate that irrigation could promote the absorption of fertilizer when water supply was enough and it played a role in regulating fertilizer absorption.