生态位适宜度理论及其在作物生长系统中的应用

生态位适宜度是对经典生态位理论的深化和方法的发展。本文建立了半干旱区作物生态位适宜度的理论模式和计测公式，并依据大田试验结果，对不同环境资源条件下作物各生长期中的生态位适宜度值进行了定量分析，建立了它与作物产量间的理论公式，分析了限制因子及诸种人工调节措施的效果，为农田作物生长系统的资源因子匹配和作物生境优化提供了依据。

The Niche-fitness Theory and Its Application to the Systems of Crop Growth

The Niche-fitness theory is a further deveiopment of the classical niche the-ory and an extension of the related methods.This paper establishes the theoreticalmodel and measurment formula of niche-fitness of crops in semiarid regions.On the ba-sis of field experiments,a quantitative analysis is performed on the niche-fitness valuseof different growth stages of crops under different enviromental resource conditions andthe theoretical formula of its relationship with crop yields is constructed.Limiting fac-tors and the effects of artifieal regulation measures aer analyzed.Our work provides abasis for resource factor coordination of farmland crop growth systems and the optimiza-tion of crop communities.