【作者】 李治国；

【导师】 王建光；

【作者基本信息】 内蒙古农业大学 ， 草业科学， 2005， 硕士

【摘要】 混播是一种良好的植物群落建植方式。混播草地牧草的质量优、产量高,群落稳定性好,是今后集约化畜牧业发展的重要内容。本试验以紫花苜蓿(Empor)与无芒雀麦 (Careton)为供试材料,于 2003~2004 年对 6 个不同混播处理的群落稳定性、牧草产量及质量性状进行了系统的研究,并运用因子分析法、主成分分析法和多元线性回归的方法,建立了产量预测预报模型,结合经济效益评价和提高土壤肥力的因素,确立最佳混播处理。 试验结果表明:混播处理对于提高土壤肥力有明显作用;牧草株高的生长不受单、混播的影响,也不受混播方式的影响,其生长曲线均符合二次方程 y=ax2+bx+c;苜蓿是影响牧草混播总产量的主要草种;各个混播群落均为稳定群落;运用因子分析及主成分分析法,确定了影响产量的因子主要有分枝数、侧枝重、叶片数、侧枝长和单叶重,并通过多元线性回归产量预测模型,得出对各处理产量影响较为一致的是遗传因素,其次是栽培管理措施。各混播处理年均经济效益及产投比结果一致,均为:处理 B>处理 a>处理 A>处理 C>处理 b>处理 c>对照 CK1>对照 CK2。更多还原

【Abstract】 Mixed sowing is a good way for communities planting. Mixed pasture has a lot of advantages in respect of quality, yield and communities stability, so that it is an essential part of intensivism stockbreeding. In this paper, we studied community stability, forage quality and yield character about the mixed-sowing of Medicago sativa and Bromus intermis from 2003 to 2004 and using Factor Analysis, Principal Components Analysis methods and getting the yield forecast model with linear regress multianalysis method. The study provided theoretical foundation for establishing high yield and good quality artifical pasture. The results show:Mixed treatment can obviously improve soil fertility; he way of mixed-sowing has no influence in plant height and its growth conforms to quadratic equation Y=ax2+bx+c;Medicago sativa influences the total forage yield in every mixed treatment;All the communities are stable and there is no disturbing or little disturbing between the two population in different treatments;By using Factor Analysis and Principal Components Analysis methods, we decide several factors that influence forage yield, such as branch number, sub-branch weight, leaf number, sub-branch length and single leaf weight. And then getting the yield forecast model with linear regress multianalysis method. From the medol we can learn that descendiblity is the main factor that influences forage yield for every treatment;The proportion of output and input of every treatment has the same result with the economic profit, that is: B>a>A> C>b>c>CK1>CK2.更多还原