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Strategic Study of CAE >> 2002, Volume 4, Issue 9

The Model of Water and Nitrogen Coupling in Winter Wheat Yield

College of Resources and Environment Science, Northwestern Sci-Tech University of Agriculture and Forestry, Yangling Shanxi 712100, China

Funding project:国家自然科学基金重大项目(49890330)、国家自然科学基金农业倾斜项目(30070429)、国家重点基础研究专项经费资助项目(G1999011707)及国家自然科学基金面上项目39770425)资助。 Received: 2002-01-04 Revised: 2002-03-25 Available online: 2002-09-20

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Abstract

By using the quadratic general spinning design, pot experiments were conducted to study the comprehensive effect of the stage and rate of N fertilizer application under different status of soil moisture on winter wheat yield systematically. The results showed that the mathematical model established based on the result of experiments is significant. By analysing the mathematical model, the soil moisture, tillering and jointing stage were thought to be the remarkable factors, while the influencing sequence from large to small is: soil moisture > tillering stage > jointing stage > milking stage > seedling stage; The interaction effects exist between different factors.

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