旱泉沟流域封山育林育草成效研究

Study on the effect of sealing off mountainous areas for afforestation (grass) in the Hanquangou valley

根据天祝旱泉沟流域具有代表性的24块封山育林育草样地的不同试验与对照区进行植物种多样性、枯落物贮量及持水能力、天然更新、植被覆盖度、高生长量、多度、干扰强度、自然度等方面的研究表明,水源涵养林区以流域开展封山育林育草成效显著。并运用森林群落演替理论对研究结果进行论证得出,封山育林育草是祁连山林区流域单元恢复和建设林草植被效果最好、速度较快、费用经济、操作简便的最佳经营方式。

This study aimed to assess the effect of sealing of mountainous areas for afforestation. The effects were measured in terms of plant diversity, storage quantity of litter--full and its water holding capacity, natural regeneration, vegetation coverage, height increment, abundance, and intensity of disturbance. 24 representative areas were studied and compared to areas that had not been sealed off. Results obtained indicated that the effect of sealing off mountainous areas for afforestation （grass） is significant when based on the valley unit in water conservation forest areas. The study was reasoned by applying the forest community succession theory. The results indicated that sealing off mountainous areas for afforestation （grass）, in the Qilian mountainous forest areas, is a potential best management practice which has beneficial effects in terms of quick speed, economic cost and convenient operation virtues in valley unit restoration and vegetation construction.