大青山冲积平原区农田防护林体系的构建及效益研究

Research on the Construction and Ecological Benefit of Farmland Shelte Forest System in Alluvial Plains of Daqing Mountain

在内蒙古大青山山前冲积平原区构建农田防护林体系,根据立地条件类型选择新疆杨、北京杨、合作杨、群众杨、白柳、旱柳、垂柳等适应性强、生长快的优良品种,采用了适当的抗旱造林技术措施。经测定得出:造林成活率为95%-99%、保存率为95%以上;从2000—2003年营造的农田防护林带均已进入速生期,林带的平均高为9.1 m,平均林带树冠高7.6 m,平均冠幅2.6 m×2.5 m;同时防护林带均发挥出了明显的防风、降温及增加湿度的生态功能。

The shelter forest system was constructed in alluvial plains in front of the Daqing in Inner Mongolia. According to site type, the adapting and fast - growing variety of Populus. Alba. L. vat. pyramidalis Bge, P. × beijingensis W. Y Hsu, P. × xiaozhuanica, cv. Opera, P. × xiaozhuanica, cv. Popularis, Salix. alba, S. matsudana , S. babylonica were planted by measuring of against drought. The results showed that survival rate of trees planted are between 95.0% and 99. 0%. The survival rate reaches 95.0%. The farmland shelter that was planted from 2000 to 2003 has entered the fast - growing time. The average high was 9. 1 m, average crown high was 7.6 m, average crown was 2. 6 m × 2. 5 m. Meanwhile, the forest belt has had obviously ecological function on protecting against the wind, decreasing temperature and increasing the humidity.