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沙打旺(Astragalus adsurgens Pall)作为优良牧草在黄土高原进行飞机播种试验,是1976年由中国科学院西北水土保持研究所和延安地区林业局等单位在陕西省吴旗县首先开始的。试验区位于该县黄土丘陵沟壑半干旱地区,海拔1,400—1,650米,年平均降水量约400毫米,气温7.8℃。试验于1979年取得成功并通过鉴定后,中央领导同志和有关部委都很重视,认为这将为治理黄土高原开辟一条新的途径。因此,这一成果在生产上得到了迅速推广。与此同时,一些著名牧草专家,在充分肯定这一成就的同时,也提出了在低于400毫米降水量的干旱地区进行沙打旺飞播试验的问题,并认为这对于具有大面积干旱区的我国北方地区,将是一件很有必要和很
Astragalus adsurgens Pall as an excellent forage grass sowing test in the Loess Plateau was started in 1976 by the Northwest Institute of Soil and Water Conservation, Chinese Academy of Sciences and the Yan’an Bureau of Forestry and other units in Wuqi County, Shaanxi Province. Experimental area is located in the county loess hills gully semi-arid area, elevation 1,400-1,650 meters, the average annual rainfall of about 400 mm, temperature 7.8 ℃. After the experiment was successfully tested and passed the appraisal in 1979, the central leading comrades and relevant ministries attached great importance to it and believed that this would open a new avenue for governing the Loess Plateau. Therefore, this result has been rapidly promoted in production. In the meantime, some well-known pasture experts, while fully affirming this achievement, have also raised the issue of test-sow seeding test in arid areas of less than 400 millimeters of precipitation, believing that this is a problem for areas with large arid areas In the northern part of our country, it will be very necessary and very important