苎麻产量构成因素与产量的关系

对３１个苎麻品种或组合的产量构成因素与产量的相关，回归，通径关系和头，二，三麻的估产差异进行了分析，茎高，茎粗，皮厚和有效茎与单蔸产量呈正相关，除茎粗外，其余三因素与产量的偏相关系数为显著正相关，偏回归系数达极显著水平，直接通过效应为较高正值，若想得到产量较高的苎麻品种，固定其余因素选单蔸有效茎，增产效果较佳，固定其余因素选皮厚和茎高，要在有效式较少的单蔸系中进行，增产效果亦较好，在测产回归方程，

Relations between Yield-related Traits and Yield in Ramie

Correlation, regression and path between yield-related traits and yields on 31 ramie varieties and variations of forecasting yield in different season were analyzed. Correlations between yield per hill and the traits such as stem height, stem diameter, bark thickness and pro ductive stem are positive. Partial correlation coefficients between yield and other three traits ex cept stem diameter are significant positive correlation, their partial regression coefficients reach high significant level, and their direct path effects are higher positive value. Selecting productive stem per hill can get better results on the condition of fixing other traits in order to develop a high yield ramie variety. Selecting bark thickness and stem height can get better results from hills that have less productive stem on the condition of fixing other traits. The regression equations for forecasting yield have a common regression coefficient, but have different regression height in first, second and third reapings.