摘要
采用四元二次回归正交最优混合设计,探讨种植密度和氮、磷、钾肥施用量与杂交玉米玉美头168产量形成、产量利润及产投比的关系,并建立多元回归模型及利用计算机模拟,分析各试验因子对产量形成的影响及相互间的作用效应。结果表明,各试验因子处于低、高水平条件下对玉米产量的作用效应分别为种植密度>N>P2O5>K2O、N>种植密度>K2O>P2O5,说明种植密度和氮肥施用量是制约玉米产量的主导因素。在一定的施肥水平条件下,适当调节种植密度可以获得较高的产量与产投比。玉美头168以每公顷施纯N 97.5～187.5kg、P2O5 52.5～97.5kg、K2O 112.5～150.0kg,配套48000～57000株的种植密度,可获得7500kg以上产量及较高的收益和产投比。
The muhi-quadric regressive orthogonal optimum compound design was used to study the relationship among planting density, application of N, P, K and the yield contribution, yield profit and the ratio of output to input for hybrid maize Yumeitou 168. Further, the impact of these parameters on each other was also analyzed by establishing mathematical regression model and computer simulation. The results of different parameters on yield of maize are as follows： planting density〉N〉P2O5〉K2O; N〉planting density〉K20〉P2O5, for low and high levels, respectively. Results indicated that planting density and nitrogen fertilizer application were the main factors on restraining the yield of maize. Under certain fertilizer application conditions, regulating planting density may result in higher yield and ratio of output to input. When applying N @ 97.5-187.5kg/ha, K2O @112.5-150.0 kg/ha, P2O5 @52.5-97.5kg/ha and planting 48000-57000 plants, the yield of Yumeitou 168 was found to be over 7500 kg/ha and it resulted in higher profits and output to input ratio.
出处
《广西农业科学》
CSCD
2010年第2期122-125,共4页
Guangxi Agricultural Sciences
基金
广西成果转化基金项目(桂科转0896002-12)
新世纪十百千人才工程项目(桂人函[2009]1092号)
关键词
杂交玉米
玉美头168
优化栽培
回归模型
hybrid maize
Yumeitou 168
optimizing cultivation
regressive model
