凉山不同产区光叶紫花苕植株植物学性状的分析研究

Botanic characters of shining leaf purple flower vetch plants in different productive areas in Liangshan prefecture

通过对6个不同产区凉山光叶紫花苕Vicia benghalensis综合性状分析,凉山光叶紫花苕存在明显的类型划分,盐源产区生育期最短,刈割后再生能力最差,平均每株分枝数最少,其以分枝长度长、叶量大、茎秆粗壮而获得较大生物量,而昭觉产区则相反;在植株植物学性状聚类分析中,盐源、昭觉产区独自各为一类,布拖、普格、小兴场、云南并为一类,可将盐源产区凉山光叶紫花苕划分为早熟类型,昭觉产区为晚熟类型,其他4个产区性状介于二者之间,属中熟类型。通过性状相关通径分析,影响凉山光叶紫花苕生物量的主要性状是叶量和分枝长度。

The comprehensive characters of Liangshan shining leaf purple flower vetch in 6 different productive areas were analyzed. There was apparent differentiation of types of Liangshan shining leaf purple flower vetch plants. The growth period in Yanyuan area was the shortest, regrowth ability after cutting being the worst, long branches, large leaf mass and strong stem so as to gain relatively higher biomass, the reverse was seen in Chaojue productive area; with cluster analysis on the botanic characters of plants, each of Yanyuan and Chaojue productive areas had one type, Bushi,Puge,Xiaoxinchang,Yunnan were merged into one type; Liangshan shining leaf purple flower vetch in Yanyuan area could be classified as early mature type, and in Chaojue area as late mature type. Characters of other 4 areas stood in the middle of above two, was mid mature type. Path analysis on relative characters showed that the main factors affecting the biomass of Liangshan shining leaf purple flower vetch were leaf mass and branch length.