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辽宁西部及西北部均为低山丘陵和风沙丘陵区,分布着牧业天然草地近百万公顷。该区是国家及省的牛羊生产基地。长期以来,由于滥垦滥牧,随意破坏草原植被十分严重,水土流失惨重,流失面积占总土地面积的80％以上,平均侵蚀模数4000～6000吨/km~2年,最高达8000～10000吨/km~2年,侵蚀沟壑纵横。造成气候旱化,草地植被稀疏,有50％以上草场植被仅为20％～40％,需2～3公顷草地养一只羊。亟待更新、改良、补播,提高其生产力。为此,我省自1981年至1996年,运用飞机播种牧草5万公顷,成草4.6万公顷。基
The western and northwestern Liaoning are hilly and windy hilly areas, distributing nearly one million hectares of pasture natural grassland. This area is a national and provincial cattle and sheep production base. For a long time, due to the indiscriminate cultivation of pasture, grassland destruction is very serious and soil erosion is very heavy. The loss area accounts for more than 80% of the total land area. The average erosion modulus is 4000-6000 tons / km ~ 2 years, up to 8000 ~ 10000 Tons / km ~ 2 years, eroded gully aspect. As a result, the weather is dry and the grassland is sparsely populated. More than 50% of the grassland vegetation is only 20% -40%, and a sheep needs 2 ~ 3 hectares of grassland. Urgent need to update, improve, supplement broadcast, improve their productivity. To this end, our province from 1981 to 1996, the use of aircraft seeding 50,000 hectares of grass, grass 46,000 hectares. base