【摘要】 对豫西低山丘陵区陡坡地5种土地利用方式(人工草地、自然荒草地、柏树林地、人工女贞林地和桃树林地)下土壤部分理化性状对土地利用变化的响应进行了比较研究。结果表明,人工干扰活动会加速陡坡地土壤质量退化。5种土地利用方式间土壤理化指标除速效磷含量外均呈显著性差异(P<0.05),近自然状态的柏树林土壤有机碳、全氮、碱解氮、C/N、全磷、速效磷、速效钾含量和土壤电导率均最高,全钾含量也较高,仅次于人工草地,pH值接近于7;人工草地、人工女贞林地有机碳、全氮、碱解氮、全磷含量和土壤电导率较低,与其他用地方式间差异显著(P<0.05)。陡坡地植被郁闭度和盖度对土壤全钾含量的影响较大,林地速效钾含量高于草地。因此,在豫西低山丘陵区35°以上陡坡地不宜作为人工草地和人工景观林地,建议将柏树作为生态恢复的优先选择树种。更多还原

【Abstract】 Some soil properties of steep slope under five typical land use types(nature wild grassland, cypress forest, peach trees, artificial forest of privet and cultivated grassland) in low hilly areas of western Henan were studied. And the response of soil properties to land use was also discussed. The results showed that the artificial disturbance would accelerate soil quality degradation of steep slope, and the ecological restoriation with the suitable tree species is important for steep slope. Except the available P, all soil properties indexes of five land use types have the significant difference(P<0.05). Among the five land use type, the nature-approximate cypress forest is best on soil qualities index, its soil qualities index including organic C, total N, hydrolyzale N, C/N, total P, available K content and electrical conductivity were highest of all, and its total K content only rank second to that of cultivated grassland, and its pH value was close to 7 as well. The artificial forest of privet and the cultivated grassland were better on organic C, total N, hydrolyzale N, total P content and soil conductivity, and it also showed the significant difference with other land use types(P<0.05). The vegetation’s canopy and the coverage density on the steep slope would greatly affect the total K content of soil, and the total K content of forest land is higher than that of grassland. Therefore, this research suggests the cultivated grassland or landscape forest was not the suitable land use type for the steep slope land above 35° in low hilly areas of western Henan, and cypress is the first selection tree species for the ecological restoration.更多还原