阿拉干地区灌丛植被截沙过程试验研究

Experimental Research on Sand Intercepting Process of Shrub Vegetation In Arakan Area

【目的】初步研究阿拉干地区灌丛植被截沙过程。【方法】通过4个多阶式标准集沙仪,野外条件下,于2010年5月19~22日,在既定的灌丛植被条件（一定的密度、盖度、高度）下,对灌丛植被的截沙过程进行了初步的研究。【结果】在垂直方向上,植被截沙量与高度拟合结果显示,1号多阶式标准集沙仪（裸沙地）幂函数拟合结果最优,拟合度为98.57%;2、3号多阶式标准集沙仪二次曲线拟合度最高,拟合度分别为96.77%和99.66%;4号多阶式标准集沙仪幂函数、渐近回归拟合函数、二次曲线拟合函数拟合度相等,为94.41%;沿程方向截沙量二次曲线拟合度最高,为99.67%。【结论】由于灌丛植被群的存在及影响,截沙量在垂向、沿程方向上呈现出不同的变化规律,为沙漠化的相关研究提供具有实践价值的参考。

【Objective】The processing of sand intercepting of shrub vegetation has been firstly studied in this paper.【Method】During this experiment,some preliminary research has been done about the processing of sand intercepting of shrub vegetation by using 4 standard and muti-stepped sand-gathering instruments,under given conditions（density,coverage,height） in May 19-22,2010.【Result】It showes that vertically,fitted results of the quantity of intercepted sand and height show that sand interceptor 1（naked sand） was ranked first in the test,and whose fitted degree was 98.75% fitted;fitted degree of quadric curve optimized of sand interceptor 2 and 3 was the maximum,whose fitted degree was 96.77%,99.66%;the degree of sand interceptor 4 was the same as that of quadric curve function.it reaches 94.41%.In distance,quadratic curve function optimizes with fitted degree 99.67%.【Conclusion】Different laws of sand interception rate with verticality and distance appear,because of the existance of shrub vegetation,which will provide some pratical reference for the research of desertification.