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近几年党和国家领导人,在视察西北地区时多次指出黄土高原要以林、牧为主,及种草,种树,发展畜牧,改造山河,治穷致富是解决北方干旱地区穷困面貌,改变生态环境的根本大计。根据我省实际情况,省科委组织省畜牧所、生物所、水保所共同协作,在石玉、石楼、兴县布设了三个牧草栽培试验点。通过三年试验对沙打旺、红豆草、洋槐、柠条等三十二种乔、灌、草种中初步选育出了一些适宜在黄土高原推广栽培的草种,并进行了光合生产力、水份利用效率,固氮酶活力,饲草品质、及抗逆性等五种生理指标的测定分析,为大面积种草提供了一些科学依据。
In recent years, when inspecting the northwestern region, the party and state leaders have pointed out many times that the main loess plateau should mainly rely on forests and grasses, and planting grass, planting trees, developing livestock husbandry, rebuilding mountains and rivers, and managing poverty and getting rich are the solutions to the poverty-stricken face in the northern arid region , Change the fundamental plan of ecological environment. According to the actual situation in our province, the provincial Science and Technology Commission organized the Provincial Animal Husbandry Office, Institute of Biology, Institute of Soil and Water Conservation to work together in Shiyu, Shilou, Xingxian layout of three pasture cultivation test points. Through three years’ experiment, some grass species suitable for popularization and cultivation in Loess Plateau were selected from thirty-two kinds of tree, shrub and grass species of Astragalus adsurgens, sainfoin, acacia, kusnezoffii and so on, and photosynthetic productivity, Water use efficiency, nitrogenase activity, forage quality, and stress resistance were measured and analyzed, which provided some scientific evidences for large area of grass.