旱作条件下紫花苜蓿主要性状对产草量的影响

Effect of principal traits on yield of alfalfa under dry-farming condition

研究了31个国内外优良紫花苜蓿品种在旱作条件下8个农艺性状与产草量的关系。结果表明:8个农艺性状与产草量呈显著或极显著的正相关;多元回归分析得出茎粗对产草量的效应最大,其次为叶片数。因此,茎粗、叶片数可作为紫花苜蓿选种、育种、产草量估测和确定刈割适期的两个主要选择指标。

Effect of eight agronomic traits on yield of thirtyone improved alfalfa varieties under dryfarming condition was studied in this paper. The results indicated that eight traits had significantly positive correlation with per stem weight. Multiple regression indicated that stem diameter had the largest effect on per stem weight, leaf number was secondary. Therefore, stem diameter and leaf number could be considered as two principal selection indexs for breeding new varieties, evaluating yield and selecting proper harvesting period of alfalfa.\;