大伙房水库是辽宁省的水利生命线。本文论述了保护和经营好水库周围水源涵养防护林的迫切性和重要性 ,指出了目前库区防护林水源涵养性能降低的原因 :林相一般 ,郁闭度较低 ;针叶纯林比例过大 ;林龄进入成熟期。提出了提高防护林水源涵养性能需采取的措施 :加速宜林荒山造林 ;分期分批择伐更新 ;多营造阔叶林或针阔混交林 ;采用穴状幼林抚育等。 Dahuofang Reservoir is the lifeline of water resources in Liaoning Province. This paper discusses the urgency and importance of conservation and management of water conservation shelter around reservoirs and points out the reasons for the decrease of water conservation performance of shelterbelts in the reservoir area at present: generally in the forest facies, low canopy density, excessive proportion of pure coniferous forest, Mature period. Proposed measures to improve the conservation performance of shelterbelts include: accelerating the afforestation of barren hills in Yi Lin; choosing and cutting-off in phases and updating; building more broad-leaved forests or mixed coniferous and broad-leaved forests;