紧凑型杂交玉米高产高效栽培模式研究

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

为探索在黔西北山区种植紧凑型杂交玉米高产高效的栽培模式 ,促进山区玉米产品结构的调整 ,采用多元二次回归正交旋转组合设计方法 ,通过试验建立了每公顷产量、纯效益和产投比与玉米种植密度 ,氮、磷、钾施用量间关系的优化数学模型 ,并对模型进行模拟和Fuzzy聚类寻优 ,提出了不同产量水平和纯收益目标的优化方案 11套 ,其中 ,最优方案 2套 ,即 :(1)每公顷种植密度为 58799～ 6 52 74株 ,氮肥用量为 2 56 0～ 313 6kg ,P2 O5用量为 2 4 4 3～ 2 77 5kg ,K2 O用量为199 1～ 2 70 5kg ;(2 )每公顷种植密度为6 1170～ 6 6 6 30株 ,氮肥用量为 378 4～ 4 4 2 4kg ,P2 O5用量为 2 6 3 1～ 2 96 9kg ,K2 O用量为 2 11 0～ 2 74 0kg。

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.