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The modeling study of high yield and benefit on main cultural factors according to the compact hybird corn

HU Jian feng, ZHANG Rong da, WANG Song, HUANG Wen lin, XIAO Li (Bijie Agricultural Bureau Guizhou, Bijie 551700,China)  
In order to explore the planting models of high yield and benefit for the conpact hybrid corn grown in north and west in Guizhou that we can accelerate the adjustment of the product configuration, we have used the multi quadric regressive orthogonal rotary combination design applied at the experiment. We got the mathematical models on four main cultural factors such as density, application of N,P,K pure benefit, proportion of devotion and output. After making model simulation and fuzzy clustering by computer, we search and determine the 11 convention optimum compositions of modeled cultivation management of different yield level and neat benefit. The ultra optimum composition was 2 kmots. Namely,(1)density 58 799-65 274 indiuidual plants/hm 2 , N 256 0-313 6 kg/hm 2,P 2O 5 244 3-277 5 kg/hm 2,K 2O 199 1-270 5 kg/hm 2;(2)density 61 170-66 630 indiuidual plants/hm 2,N 378 4-442 4 kg/hm 2,P 2O 5 263 1-296 9 kg/hm 2, K 2O 221 0-274 0 kg/hm 2.
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