Park Ki-hyung,Ding Guo-dong,Wang Wei-wei,et al.Windbreak Effect of Forest Belt of Caragana korshinskili Kom According to the Row Spacing Distance[J].Research of Soil and Water Conservation,2008,15(03):207-210.
柠条林带不同行距的防护效果比较研究
- Title:
- Windbreak Effect of Forest Belt of Caragana korshinskili Kom According to the Row Spacing Distance
- 分类号:
- X171.1;S793.3
- 摘要:
- 以毛乌素沙地常见的柠条作为研究对象，分析其不同行距防风和防沙效应的变化。0.5 m处测风速的结果表明：不同行距在1H处防风效应相同，但是3H以后防风效应行距1.5 m是3.0 m的2倍。通过回归分析可知行距1.5 m和3.0 m的理论防风距离分别是44.3H和30.5H。经观测得知在1.0 m高处风速基本没有变化。行距1.5 m的1H处的沙量是旷野处的13.94%，即防沙率为86.06%；行距3.0 m的防沙效应为10.06%。行距1.5 m的防沙率是行距3.0 m的8.55倍。
- Abstract:
- The wind speed reduction capability of forest belt of Caragana korshinskili Kom in Yanchi,Ningxia Hui Autonomous Region in China is as follows.At the height of 0.5 m,the windbreak effect is row spacing 1.5 m (29.17%),3.0 m (28.67%).It is very similar in windbreak.But after 3H,row spacing 1.5 m better than row spacing 3.0 m about 2 times.At the point of 20H,the windbreak effect of row spacing 1.5 m is 16.36%.The windbreak effect of row spacing 3.0 m is 9.76%.Further analysis of row spacing 1.5 m and 3.0 m revealed that the wind reduction effect of 2-strip spread to 44.3H (H=1.0 m) and row spacing 3.0 m spread to 30.5H.This result implies that row spacing 1.5 m is most effective for windbreak.At the height of 1.0 m,the wind speed was relatively constant and the reduction rate of wind speed had a minimal variation,with the coefficient of determination of row spacing 1.5 m (8.95 m/s) and 3.0 m (6.70 m/s).The sandbreak effect of row spacing 1.5 m is the wilds (110.08 g)>3H(67.36 g)>7H(64.98 g)>5H(44.65 g)>1H(15.35 g).The sandbreak effect of row spacing 3.0 m is 3H (62.65 g)>the wilds(50.20 g)>1H(45.15 g)>5H(36.28 g)>7H(29.15 g).Especially,the rate of sandbreak of 1H (86.06%) of row spacing 1.5 m is most effective value in whole data.It is better than row spacing 3.0 m (10.06%) about 8.55 times.
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备注/Memo
收稿日期:2007-9-14。
基金项目:国家自然科学基金项目（30471422）；国家科技支撑计划课题（2006BAD26B03）
作者简介:朴起亨（1980- ），男，韩国人，在读硕士，主要从事荒漠化防治研究。E-mail：bear801127@yahoo.com.cn
通讯作者:丁国栋（1963- ），男，教授，主要从事水土保持与荒漠化防治研究。E-mail：dch1999@263.net