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攀枝花市位于四川西南部,是我国重要的钢铁工业生产基地.该区因生境条件的变迁,导致植被稀少,水土流失严重,生态环境恶化,危及农牧业生产及社会经济的发展,影响三峡水库工程效能的发挥.为贯彻执行江总书记在“十五”大报告中提出的“植树种草,搞好水土保持,防治荒漠化,改善生态环境”的指示,加快干热河谷造林绿化的步伐,促进社会经济的发展,笔者对影响干热河谷飞播造林成效因素作一简析,以求为干热河谷飞播造林提供借鉴.1 飞播造林情况和成效概况1991年和1992年,在攀枝花市干热河谷进行了以云南松、密油枝和山毛豆等树种的不同类型的飞播造林,造林总面积为11860hm~2.其中,云南松1300hm~2,占11.0%;山毛豆213.3hm~2,占1.8%;云南松、密油枝混播10346.7hm~2,占87.2%,详见表1.
Panzhihua City, located in the southwest of Sichuan Province, is an important iron and steel industry production base in our country. Due to the change of habitat conditions, Panzhihua City has led to the scarcity of vegetation, severe soil erosion and deterioration of the ecological environment, endangering the development of agriculture and animal husbandry as well as social and economic development, affecting the Three Gorges Reservoir To carry out the instructions given by General Secretary Jiang in the “Tenth Five-year” large-scale report on “planting trees and grass, improving soil and water conservation, combating desertification and improving the ecological environment”, we should speed up the pace of afforestation and afforestation in dry and hot valleys, Promote socio-economic development, the author analyzes the factors that affect the effectiveness of aerial seeding afforestation in dry-hot valley in order to provide reference for aerial seeding afforestation in dry-hot valley .1 Situation and effectiveness of aerial seeding afforestation In 1991 and 1992, In the valley, different types of aerial sowing afforestation, such as Pinus yunnanensis, Balsam pear and Soybean, were carried out with the total afforestation area being 11860 hm ~ 2, of which 1300 m ~ 2 occurred in Pinus yunnanensis, accounting for 11.0%; 213.3 hm ~ 2 1.8%. Pinus yunnanensis and shrubs were mixed with 10346.7 hm ~ 2, accounting for 87.2%. See Table 1 for details.