【摘要】 以密度、氮肥、磷肥、氮肥施用期及灌水五项措施为决策变量。采用五因素二次回归旋转设计方案,经田间试验后进行计算机处理,建立了相应的数学模型。本文对因素效应和不同产量等级筛选出的优化农艺方案进行了总结分析。结果表明,本生态区以灌水及密度对产量的影响最为显著。≥300公斤/亩产量的优化方案有2274套出现频率为72.8％。相应的优化农艺组合为27～28万苗/亩,20.8公斤/亩尿素,21.0公斤/亩三料磷肥,氮肥底施和枝节期追施,灌水130米~3/亩。更多还原

【Abstract】 Taking five measures such as density, nitrogenous fertilizer, phosphate fertilizer, peried of applying nitrogenous fertilizer and irrigation as variable, adopting ouadratie regression votation design for five factors, after fields testing, and computer treatment, we established apporpriate mathematic mock-up. The authors summarized and analysed the factor effect and the promoted agronomy design screened out of different grades of yield. The result showed that the affect of irrigation and desity in the eeoares for yield is remarkable. 2274 sets of promoted plans which could produce≥300kg/mu whose appearing frequence was 72.8％, propriate promotel agronomy combination 270, 000-280, 000seedlings/mu, carbamide 20.8kg/mu, three materials of phosphate fertilizer 21.0kg/mu, nitrogenous to the subsoil and top application in jointing stage, irrigation 130m~3/mu.更多还原