论文部分内容阅读
干旱半干旱地区，气候干燥、环境恶化、生态失调，山地森林生态系统具较好的自调能力，在不断调节过程中就发挥着涵养水源的生态功能。镶嵌于荒漠草原、绿洲边缘的祁连山（北坡）天然林，具显著的蓄水、调节河川流量、增加降水量的作用。本文分析了祁连山水源林树种单纯、植物群落结构简单、森林覆被率低、林木生长缓慢以及森林与草原复合分布林牧矛盾突出等特点，提出了封育、造林及林牧结合等营林措施，论证了发展无性系林业、改良传统育苗技术、应用菌根及稀土育苗造林、推广径流林业等科学技术问题。
In arid and semi-arid regions, the climate is dry, the environment is deteriorating, the ecological imbalance and the mountain forest ecosystem have better self-regulating ability. During the process of constant regulation, the ecological function of water conservation is exerted. Inlaid in the desert steppe, oasis edge of the Qilian Mountains (North Slope) natural forest, with significant water storage, regulating river flow, increase precipitation. This paper analyzes the characteristics of pure water source tree species in Qilian Mountains, simple plant community structure, low forest cover rate, slow forest growth and the prominent contradiction between forest and pasture in forest and grassland. , Demonstrated the development of clonal forestry, improvement of traditional breeding techniques, application of mycorrhizal and rare earth nursery afforestation, promotion of runoff forestry and other scientific and technological issues.