土壤颗粒组成及土壤容重对土地利用变化的响应

发布时间：2018-10-31 09:34

【摘要】：通过野外考察、典型剖面采样及室内实验,研究了黄土高原洛川塬典型耕地转变为苹果园后土壤颗粒组成和土壤容重等土壤物理属性的变异特征.研究结果表明:耕地改为苹果园地后,在0~20cm土层中,土壤粘粒含量显著增加(P0.01),其他土层没有显著变化;在0~60cm土层中,土壤容重显著降低(P0.01);在60~100cm土层中,没有显著性变化.在剖面垂直方向上,耕地颗粒含量从表层向下随着深度增加呈现先升高再降低的趋势,在20~40cm土层粘粒含量最高(17.18%),容重最大(P0.01),而苹果园0~60cm土层粘粒含量大于60~100cm土层,土壤容重则随着土层深度的增加有降低的趋势.可见,土壤容重和土壤颗粒中的粘粒含量均对土地利用变化表现出一定的敏感性.
[Abstract]:The variation characteristics of soil physical properties such as soil particle composition and soil bulk density after the transformation of typical cultivated land into apple orchard in Luochuan Plateau of the Loess Plateau were studied by field investigation typical section sampling and laboratory experiments. The results showed that when cultivated land was changed to apple orchard, the soil clay content increased significantly in 0~20cm soil layer (P0.01), but did not change in other soil layers, while in 0~60cm soil layer, soil bulk density decreased significantly (P0.01). There was no significant change in 60~100cm soil layer. In the vertical direction of the section, the grain content of cultivated land increased first and then decreased with the increase of depth from the surface to the bottom. In 20~40cm soil layer, the clay content was the highest (17.18%), and the bulk density was the largest (P0.01). The clay content of 0~60cm soil layer in apple orchard was higher than that of 60~100cm soil layer, and the soil bulk density decreased with the increase of soil depth. It can be seen that both soil bulk density and clay content in soil particles are sensitive to land use change.
【作者单位】：内蒙古师范大学地理科学学院;陕西师范大学旅游与环境学院;
【基金】：国家自然科学基金资助项目(41561050 40471119) 内蒙古自然科学基金资助项目(2013MS0614) 内蒙古教育厅自然科学基金项目(NJSY13049)
【分类号】：S152

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