（毕业设计论文）《不同载畜率下短花针茅生殖性状的变异与相关性分析》.docVIP

精品 精品 本科毕业论文 不同载畜率下短花针茅生殖性状的 变异与相关性分析 学 院：生态环境学院 专 业：草业科学 学 号： 姓 名： 指导教师： 职 称：教 授 论文提交日期：年六月 摘 要 短花针茅是短花针茅草原的建群植物，适于放牧，品质优良，对稳定此类型草地的生产力起着决定性作用 。放牧利用直接影响到短花针茅的单株产量在短花针茅草原采用随机区组试验设计方法进行了两年的绵羊围栏放牧,设定4个不同的载畜率水平,研究不同载畜率下短花针茅的单株产量对载畜率的响应, 重点探讨不同载畜率下短花针茅生殖性状变异及相关性分析，由此可以控制载畜量。本实验通过SPSS软件对可能影响产量的相关性状分别进行变异、因子、相关和回归分析。结果表明结实数和千粒重对单穗粒重影响最大，且呈正相关。载畜率与单穗粒重呈现负相关，即载畜率越高，单株产量越低。 关键词：载畜率；单株产量；短花针茅；性状变异  Abstract Stipa breviflora short flower Stipa is the dominant species, suitable for grazing, high quality and stability of this type on the productivity of grasslands play a decisive role. Grazing directly affects Stipa breviflora yield per plant flowers in the short Stipa randomized block experimental design was two years of sheep ranching, set four different levels of stocking rates, different stocking rate Stipa breviflora yield per plant stocking rate on the response, focusing on the different stocking rates Stipa breviflora character variation and correlation analysis, this can control the carrying capacity. This experiment may affect the output of spss software related traits variability respectively, factor, correlation and regression analysis. The results show that the seed number and grain weight of the single greatest impact on grain weight and positively correlated. Stocking rate and the single grain weight negatively correlated, that is, the higher stocking rate, the lower the yield per plant. Key words: Stocking rate; grain yield per plant; Stipa breviflora; character variation目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc264533523 1引言 PAGEREF _Toc264533523 \h 1 HYPERLINK \l _Toc264533524 1.1 研究目的及意义 PAGEREF _Toc264533524 \h 1 HYPERLINK \l _Toc264533525 1.2 工作原理 PAGEREF _Toc264533525 \h 1 HYPERLINK \l _Toc264533526 1.3 国内外研究进展 PAGEREF _Toc264533526 \h 1 HYPERLINK \l _Toc264533527 2 材料与方法 PAGEREF _Toc264533527 \h 2 HYPERLINK \l _Toc264533528 2.1 研究区域自然概况 PAGEREF _Toc264533528 \h 2 HYPERLINK \l _Toc264533529 2.2 试验区草原利用现况 PAGEREF _Toc2