Zong Qin, Lamusa A, Luo Yong-Ming, Niu Cun-Yang, Chen Xue-Feng, Wang Hai-Yang
lnstitute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
Ying Yong Sheng Tai Xue Bao. 2012 Apr;23(4):875-80.
An observation was conducted on the thickness of dry sand layer on the windward slope of mobile and fixed dunes in west Horqin Sand Land, with the spatial distribution of the dry sand layer analyzed. Most of the dry sand layer had a thickness of 5-15 cm, and 92.0% and 98.6% of the mobile and fixed dunes had the dry sand layer with this thickness, respectively. Sand-fixing plants affected the thickness and the spatial distribution of the dry sand layer. There was an obvious spatial difference in the thickness of the dry sand layer on mobile dunes, being much thicker in the upper west areas while much thinner in the lower east areas. The thickness of the dry sand layer varied from 0 to 40 cm, with an average of 9.58 +/- 3.95 cm, and the CV was 41%. The variogram of the spatial distribution of dry sand layer on mobile dunes was expressed as spherical model, with a moderate spatial correlation. In contrast, the thickness of dry sand layer on fixed dunes showed obvious homogeneity, and had less spatial difference. The thickness of the dry sand layer ranged from 0 to 20 cm, with an average of 10.91 +/- 1.70 cm, and the CV was only 16%.
对科尔沁沙地西部流动沙丘和固定沙丘迎风坡干沙层厚度进行了观测，并分析了干沙层的空间分布。大部分干沙层厚度为5 - 15厘米，流动沙丘和固定沙丘分别有92.0%和98.6%的干沙层厚度在此范围内。固沙植物影响干沙层的厚度和空间分布。流动沙丘干沙层厚度存在明显的空间差异，西部上部较厚，东部下部较薄。干沙层厚度在0至40厘米之间变化，平均为9.58±3.95厘米，变异系数为41%。流动沙丘干沙层空间分布的变异函数呈球状模型，具有中等空间相关性。相比之下，固定沙丘干沙层厚度表现出明显的均匀性，空间差异较小。干沙层厚度在0至20厘米之间，平均为10.91±1.70厘米，变异系数仅为16%。
