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A study on the mathematical models in the high-yield culture of winter wheat in north of Guizhou

Journal of Mountain Agricultural and Bilogy, No: 1, 1~6, 1998,Tot.1Zhao Zhi (Department of Agronomy, Guizhou University, Guiyang. 550025, China)Yang Fangfu (Dept. of Science and Technology, Zunyi Prefecture of Guizhou, Zunyi, 563000, China )  
This article selected five important and facile controlling cultural factors-seed density (plantdensity), nitrogen rate applied before sowing, phosphorous fertilization rate before sowing, nitrogen supplying date and nitrogen supplying rate after the Beginning of Spring, and researched their unifactor effects and interactions in the grain yield of winter wheat by means of the multi-quadratic universal rotational compoSition design in North of Guizhou. Based on the data of field experiments conducted, a modelis developed by using mini-computer. According to the modeling acquired, by means of the analyses offrequency,the optimized schemes of agronomic combinations mr 5 625-6 375 kg/hm2 of yield wasscreened by simulation and optimization on computer.
【Fund】: 贵州省科委基金
【CateGory Index】: S512.104
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