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沙打旺(Astragalus adsurgens Pall.)又名直立黄芪,是一种多年生豆科黄芪属草本植物,是饲草、绿肥、防凤、固沙等多种用途的牧草.它还具有耐沙、耐瘠薄、抗旱、抗寒等特性.根系结有根瘤能固氮改土.是黄土高原水土流失地区建立农业生态系统的重要草种之一,也是发展畜牧业的饲料资源.为了阐明沙打旺氮素营养的特性,我们对不同生长年限主要生育期的植株作了氮素营养成份分析和根瘤固氮活性的测定,现将初步结果简述于后.
Astragalus adsurgens Pall., Also known as upright Astragalus, is a perennial legume Astragalus herb, forage, green manure, anti-phoenix, sand fixation and other purposes forage it also has the ability of resistance to sand, barren infertility , Drought resistance, cold resistance and other characteristics.Root root nodules can fix nitrogen and soil.It is one of the important grass species to establish agricultural ecosystem in the soil erosion area of the Loess Plateau and is also the feed resource for the development of animal husbandry.In order to elucidate the effects of sand nitrogen Of the characteristics of the main growth stages of different growth stages of our plant nitrogen nutrient composition analysis and nodulation of nitrogen activity determination, the initial results are summarized in the post.