摘要
本文通过对不同产量水平的生姜取样调查，测量了产量及有关的９个农艺性状，采用逐步回归分析方法，剔除了对产量无显著线性效应的性状，得到了生姜单株分枝数、叶面积、根鲜重、姜球数对产量的最优多元线性回归方程。通过对入选因素的通径分析，明确了各农艺性状对产量构成的直接与间接效应，结果表明，叶面积对产量的直接效应最大，其次为分枝数，再次为根鲜重，姜球数对产量的直接效应为负值。
The yield and its 9 agrcultural charactors involving plant height,diameter of stem, num- ber of branch, number of leaf,leaf area,fresh weigh of leaf,fresh weight of stem,freshWeight of root and numher of divided-ginger were investigated and measured respectively in 32 pieces of different ginger yield fields.The unremarkable indepent variables were eliminat- ed by Stepwise regerssion,and the optimally linear equation of multiple regression involving number of branch ,leaf,fresh weight of root and number of divided-ginger was ab-)tained. Then the direct and indirect effects of each agricultural parameter selected on the for-mation of yield were determined with path analysis.The results showed that the direct effect on the yield was first to leaf aera,secondlly the number of branch,thirdly the fresh weight ofroot.The effect of number of divided-ginger on yield was minus.
关键词
生姜
产量
农艺性状
通径分析
ginger yield
agricultural charactor
stepwise regression
path analysis
