准东地区不同土地利用类型土壤粒度特征分析及风蚀量估算

发布时间：2018-04-29 12:12

本文选题：粒度特征 + 粒度对比分析法　；参考：《新疆大学学报(自然科学版)》2017年02期

【摘要】：文章对准东地区不同土地利用类型的土壤粒度特征进行分析并估算风蚀量,结果表明,准东地区土壤主要由细砂组成,粒径范围在0.046～0.158 mm,其中耕地分选很差,草地和裸地分选较差,半固定沙丘分选状况较其他土地利用类型表现中等,耕地、草地和裸地为极正偏,半固定沙丘为正偏,土壤粒度粗细分配的对称性极差,风蚀沉积物细偏,平均值向较细方向移动;与半固定沙丘相比,耕地、草地和裸地土壤粒度峰态值明显较小,高植被覆盖度对土壤粒度分布有明显的改良作用;利用粒度对比分析法得到准东地区2016年土壤风蚀量在1 700～4 160 g/(m~2·a)范围内,平均风蚀量为3 219.36 g/(m~2·a),土壤侵蚀强度为中度风力侵蚀区,其中半固定沙丘土壤风蚀量最大,相同土地利用类型由于植被覆盖度、地形等不同,风蚀量也有明显差异.
[Abstract]:The paper analyzes the soil granularity characteristics of different land use types and estimates wind erosion. The results show that the soil in the area is mainly composed of fine sand with a particle size range of 0.046 ~ 0.158 mm, in which the separation of cultivated land is very poor. The separation of grassland and bare land was poor, the sorting condition of semi-fixed sand dunes was medium than that of other land use types, the cultivated land, grassland and bare land were extremely positive deviation, semi-fixed sand dunes were positive deviation, and the symmetry of fine distribution of soil granularity was extremely poor. Compared with semi-fixed sand dunes, the peak value of soil granularity in cultivated land, grassland and bare land is obviously smaller, and high vegetation coverage has obvious improvement on soil granularity distribution. The results of particle size contrast analysis showed that the wind erosion amount in 2016 was 1 700 ~ 4 160 g/(m~2 / a, the average wind erosion was 3 219.36 g/(m~2 a ~ (-1), and the soil erosion intensity was moderate wind erosion area, in which semi-fixed sand dunes had the largest wind erosion. The same land use types have obvious differences in wind erosion due to different vegetation coverage, topography and so on.
【作者单位】：新疆大学资源与环境科学学院;教育部绿洲生态重点实验室;
【基金】：新疆维吾尔自治区自然科学基金(2014211A018)
【分类号】：S157.1

【相似文献】