沙打旺在西藏林芝的生长适应性试验

Growth adaptability of Astragalus adsurgensin Nyingchi of Tibet

摘要:

本文对沙打旺在西藏林芝地区的生长适应性进行研究,试验设置温室内及室外两种不同的生长环境,观察和测定沙打旺在西藏林芝地区的播种期、出苗率、越冬率、分枝数、株高生长、株高—地径函数关系等内容。结果表明:沙打旺在林芝地区的适宜播种时间为4月下旬至5月上旬,出苗率为50%~70%,出苗所需时间10~20 d,越冬率良好,分枝数较多,株高较高,沙打旺在该地区具有良好的生长适应性。沙打旺的株高—地径函数均为多项式函数,拟合精度较高。沙打旺地上生物量第一年较少,第二年返青后植株生长迅速,此时地上生物量较高。研究为沙打旺在高原地区的引种及推广提供了基础信息。

Abstract:

The growth adaptability of Astragalus adsurgens was studied in Nyingchi County of Tibet Autonomous Region by investigating the sowing date,seedling emergence rate,winter surviving rate,number of branches and plant height.The results showed that the suitable sowing date was from late April to early May.The seedling emergence rate was between 50% and 70%,the time required for seedling emergence was 10~20 days.The performance in terms of overwintering rate,branch number and plant height was good.The plant height and ground diameter showed a polynomial function relationship.The aboveground biomass was low in first year,and it rapidly increased in the second year.This study provides basic information for the introduction and production of A.adsurgens in plateau area.