摘要
采用二因素饱和D最优设计，进行粮食作物玉米Zea mays与牧草菊苣Cichorium intybus cv．Puna不同密度间作试验。将试验数据建立玉米籽粒产量与玉米密度、菊苣密度的回归模型和菊苣鲜草产量与玉米密度、菊苣密度的回归模型。解析回归模型得知，当玉米密度为22966株／hm^2。菊苣密度为111851株／hm^2时，玉米籽粒产量为5993．69kg／hm^2；菊苣密度为258834．3株／hm^2时．菊苣鲜草产量为106014．51kg／hm^2，玉米密度对菊苣鲜草产量的影响呈负增长效应。以玉米籽粒产量和菊苣鲜草产量同步增长为目标，对回归模型进行模拟寻优，提出实现玉米、菊苣共同增产技术方案．即玉米籽粒产量≥5475kg／hm^2、菊苣鲜草产量≥82500kg／hm^2时的玉米、菊苣间作密度为玉米43446～50499株／hm^2、菊苣105713～204158株／hm^2。
By using quadratic saturation D optimum design, the test on the intercropping of corn with chicory at different densities was carried out. The regression models for predicting the corn grain yield and chicory fresh yield with corn and chicory densities were set up. Based on analyze of the models, the corn grain yield could reach 599 3. 69 kg/hm^2 when corn and chicory densities were 229 66 planls/hm^2 and 111 851 plants/hm^2 respectively. The chicory fresh yield could reach 106 014. 51 kg/hm^2 while chicory density was 258 834.3 plants/hm^2 and the corn density negatively affected the chicory fresh yield. Take corn grain yield growing in step with chicory fresh production as target ,we optimality selected Regression models,we put forward 8 sets of corn, chicory co-production technical proposal：corn grain yield is 5 475 kg/hm^2,chicory fresh produclion is 82 500 kg/hm^2,corn density is 43 446-50 499 stems/hm^2,chicory 105 713-204 158 stems/hm^2.
出处
《草业科学》
CAS
CSCD
北大核心
2009年第8期137-140,共4页
Pratacultural Science
基金
贵州省农业科技攻关计划课题"粮食
饲草作物间套栽培研究"(黔科合NY字[2005]3010)
"喀斯特山草畜高效生产配套技术研究"(黔科合NY字[2007]3009号)
关键词
间作
玉米
菊苣
密度
产量
eorn intercropping with chicory
density
yield
