摘要
金沙县从1999年起实施天然林资源保护工程,完成封山育林面积5455.8 hm2。封育方法包括纯封、人工促进封育等;封育类型包括乔木型、乔灌型、灌木型、灌草型、乔灌草型等.通过调查数据与分析得出,封山育林是生态修复和重建的首选工程措施;生态脆弱的地块封育年限还应该延长到七年或七年以上。通过5年金沙县项目区封育成效分析,灌丛地在5年后覆盖度可提高20%以上;疏林地目的树种马尾松年均高生长可达70 cm以上,年均径生长可达0.7 cm左右。
The natural forest protection project （NFPP） in Jinsha County was launched in 1999, and the region closed for afforestation covered an area of 5455. 8hm2. According to the recent investigation and analysis on this closed region, it was showed that closing hill for afforestation is the first choice of approach to ecological restoration and reconstruction, and the ideal closed years for ecological fragile areas is 7 years or longer. In a period of 5 years of close, the coverage of the shrub increased by 20% , and in open forest lands, the height of the shrub could have an average annual height growth of 70cm and annual diameter of 0. 7cm.
出处
《贵州林业科技》
2008年第2期49-51,共3页
Guizhou Forestry Science and Technology
关键词
天保工程
效果分析
金沙县
Natural forest protection project （NFPP）
Effect analysis
Jinsha County
