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砾石是各种水文和侵蚀等过程综合作用的产物,是土壤退化和生态系统恶化的一个标志,反过来土壤中的砾石和地表砾石也影响到各种各样的侵蚀过程。研究基于北京山区3块农用地地表砾石覆盖度和分层(0-2,2-5,5-10,10-15,15-20 cm)砾石重量百分含量数据,对地表砾石覆盖度和砾石重量百分含量的关系进行了研究。结果表明:地表砾石覆盖度和砾石重量百分含量之间的相关系数随采样深度的增加而减小,相关系数和采样深度存在负相关,表层砾石百分含量和地表砾石覆盖度之间的相关性较底层好;梯田和自然坡两种不同状态下,砾石覆盖度同表层砾石重量百分含量都存在一定的相关性,砾石覆盖度与大粒径(6～20,20～60 mm)砾石百分含量的相关系数较小粒径(2～6 mm)好,砾石覆盖度与粒径>2 mm的砾石重量百分含量显著正相关。
Gravel is a product of the combined effects of various hydrological and erosion processes and is a hallmark of soil degradation and ecosystem degradation. In turn, gravel and surface gravels in soils also affect a wide range of erosion processes. Based on the data of surface gravel coverage and gravel weight percentage (0-2, 2-5, 5-10, 10-15, 15-20 cm) of three agricultural land in Beijing mountainous area, the effects of surface gravel coverage and Gravel weight percentage of the relationship was studied. The results show that the correlation coefficient between surface gravel coverage and gravel weight percentage decreases with the increase of sampling depth. There is a negative correlation between the correlation coefficient and sampling depth. The correlation between surface gravel percentage and surface gravel coverage The results showed that there was a certain correlation between the gravel coverage and gravel weight percentage in both terraced and natural slopes. The gravel coverage and gravel with large grain size (6-20, 20-60 mm) The correlation coefficient of the percentage is smaller (2 ~ 6 mm), and the gravel coverage is significantly and positively correlated with the gravel weight percentage of> 2 mm.