夏玉米高产栽培规范化模式研究

A Study on the Model of the Cultivation Standar Dization of High Yield Summer Maize

本文采用多元二次正交旋转组合设计,通过田间试验测得的参数,建立了以亩穗数、穗粒数、千粒重及产量的目标模型,根据亩产量目标函数模型,进行数学模拟及因素取值的频率分析,找出竖叶型品种郑单8号亩产高于550公斤的农艺决策为:5月18—26日播种,每亩密度4941—5499株,追纯氮23.9—27.8公斤。最佳产量结构为:4899—5307穗,每穗446.1—464.2粒,千粒重342.0—359.4克。

This paper reported on the goal model of the output including the ear number of ears per mu, grain number per ear and weight PCI thousand grains, 'which was established through the obtained parameters on titc basjs of comprehensive design of multi-element quadratic regression equation and field experiment. According to the outputgoa! function mode] and based on the mathematical Simulation and. frequency analysis of factor value, the technical formula for the vertical-leaf variety'Zhengdan No. 8' , the output of which reached above 550 kg per mu, has been designed as = sowing during May 18-23, 4941-5499 plants per mu, and 23.9-27.8kg of topdressing pure Nper mu. The best output would be : 4899-5307 ears per plant, 446.1-464.2 grains per ear and 342.0 -359.4 gper thousand grains.