纱网沙障对植被恢复的影响

Influence of PE Yarn Net Sand Barrier on Vegetation Restoration

既降低沙障成本又能有效控制风蚀过程是流动沙丘治理中急需解决的问题。本文利用PE抗老化纱网材料沙障并进行造林取得了预期效果。调查结果表明,纱网沙障设置区风蚀深度为6.52 cm,对照区为14.24 cm。不同规格的纱网沙障均在纱网两侧5.20~5.50 cm范围内积沙5.42 cm。沙障背风侧30 cm范围内栽植杨树平均成活率为95.35%、黄柳为96.62%,且没有风蚀危害。纱网沙障设置2年后,草本植被盖度平均提高到40%左右,风沙危害得到明显控制。

It is a problem urgent to be solved in combatting moving dunes to decrease the cost of sand barrier and control the wind erosion effectively. The expected effects have been achieved by use of PE yarn net sand barrier in afforestation. The results show that the wind erosion depth is 6. 52 cm in PE yarn net sand barrier district,the one is 14. 24 cm in control district. The depth of blown sand is 5. 42 cm at the range of 5. 20 ~ 5. 50 cm in two sides of PE yarn net sand barrier with different norms. The average survival rates of Populus L. and Salix gordejevii are95. 35% and 96. 62% separately at the range of 30 cm in leeward side of PE yarn net sand barrier,without the damage of wind erosion. After established PE yarn net sand barrier for two years,the coverage of herb has risen to40% meanly,the damage of wind erosion has been controlled obviously.