【摘要】 阿拉善左旗１５年飞播牧草累计面积为６．８６２万ｈｍ２，实播面积为６．５２９万ｈｍ２，１９９５年１０月调查，保存面积为４．８１９万ｈｍ２，保存面积率为７３．８１％。１５年来飞播区植被盖度提高了１６．３２倍，有苗面积率提高了２４．４７倍，牧草产量提高了２８．０７倍。第一性生产产值和第二性生产产值分别是飞播总投资的５．４５倍和５．５倍，飞播牧草表现出明显的经济效益、生态效益和社会效益更多还原

【Abstract】 In the past fifteen years, the totol area of aerial seeding was 6.8620hm 2, effective area was 6.5290hm 2 and preserved area was 4.8190hm 2, Based on an investigation in October, 1995. The density of vegetalive coverage, seeding rate and herbage yield increasedby 16.32, 24.47 and 28.07 times, respectively. The primary and secondary output value was 545% and 550% per cent of all investment. Aerial seeding showed notable economical, ecoligical and social benefit and played a very important rolc to improve the animal husbandry development of Alashan.更多还原