玉米新杂交种成单13号高产栽培综合农艺措施研究

A STUDY ON COMPREHENSIVE AGRONOMIC PRACTICES. FOR HIGH YIELD OF THE NEW HYBRID CHENGDAN 13 OF MAIZE

采用二次回归正交旋转组合设计研究了不同生态区玉米新杂交种成单13号籽粒产量与密度、氮肥、磷肥的定量关系,建立了产量形成的密度、肥料反应模型,并通过对模型的解析,求出了各因素对产量影响的主次关系及相互作用,寻出定量生产水平下的最佳农艺措施。本文得出的玉米高产栽培综合农艺措施为:盆中及盆周东南亩植3500—4000株,亩施有效氮10公斤左右.有效磷7.0公斤左右;盆周西北亩植2922—3324株,亩施有效氮6.9—8.6公斤,有效磷3.4—6.0公斤。

The relationships on grain yield of the new maize hyhrid CHENGDAN 13 of maize with density, nitrogen and phosphorus were studied, and a mathematical model involving the three factors which effect yield was established by using the orthogonal rotation design of quadratic regression in the different ecological regions. The effects of individual factor and its interaction on yield were determined and the optimum agronomic practices in certian conditions were found by analysing the model. The optimum comprehensive practices for high yield of the hybrid were, density of 3500—4000 plants, about 10.0 KG N available and about 7.0 KG P_2O_5 available per mu in the centre and to the south—east of the Sichuan Basin, and density of 2922—3324 plants, 6.9—8.6 KG N available and 3.4—6.0 KG P_2O_5 available to the north—west.