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一、试验目的我们于一九七四年开始由江苏省洪泽湖地区引种沙打旺(Astragalus adsurgens Pall.)。经多年观察,证明该草具有耐寒、耐旱、生长繁茂、产草量高、适口性好等特点,是适于风沙、干旱、低温地区种植的一种优良豆科牧草。但因播种后出苗不佳,缺苗断垄严重(尤其是春、夏播者表现更为突出),因此给大面积推广利用造成了困难。为了探索沙打旺在风沙、干旱、低温地区良好出苗的栽培条件,并为大面积推广种植提供科学依据,我们进行了沙打旺出苗的正交试验,现将试验结果报告如下。
I. PURPOSE OF THE TEST We started to introduce Astragalus adsurgens Pall. From Hongze Lake in Jiangsu Province in 1974. After years of observation, it has been proved that the grass has the characteristics of cold hardiness, drought tolerance, lush growth, high yield of grass and good palatability, and is an excellent leguminous forage suitable for planting in the wind, drought and low temperature areas. However, due to poor seedling after sowing, lack of seedlings severely severed ridge (especially in spring and summer sowing more prominent), so to promote the use of large areas caused difficulties. In order to explore the sand Astragalus sand in the wind, drought, low temperature areas of good germination culture conditions, and provide a scientific basis for large-scale popularization of planting, we conducted an orthogonal test of seedlings of Astragalus, the test results are reported as follows.