论文部分内容阅读
黄土高原半干旱地区有大量的荒山草坡,其中甘肃中部的榆中县北部干旱山区就有百万亩,是耕地面积的二倍。该区大部分地区丘陵起伏,沟壑纵横,水土流失严重。由于对草山草坡的放牧过度和人为的铲草皮挖草根,很多地方的天然植被已经荡然无存,大部分荒山的植被复盖度只有14—30％。因此,改造利用荒山荒坡,提高单位面积的生物量,是发展畜牧,解决饲料、燃料的重要途径,也是改变黄土高原生态环境。保持水土和美化环境的必要步骤。为此,我们于1983年至1985年在榆中北部干草山区开展了利用荒山种草的科学试验。
In the semi-arid region of the Loess Plateau, there are a large number of barren hills and slopes, of which there are 1 million mu of arid mountainous area in the northern part of Yuzhong County in central Gansu, which is twice the area of cultivated land. In most parts of the region there are ups and downs, ravines and ravines, and soil erosion is serious. Due to overgrazing on grassy slopes and man-made shoveling grass roots, natural vegetation has disappeared in many places and most of the barren hills cover only 14-30% of the vegetation. Therefore, the transformation of the use of barren hills and slopes, to improve the biomass per unit area, is an important way to develop livestock husbandry, feed, fuel, but also to change the ecological environment of the Loess Plateau. The necessary steps to maintain soil and beautify the environment. To this end, we conducted scientific experiments using barren hills and grass in the hay mountain areas of northern Yuzhong from 1983 to 1985.