【作者】 沈艳； 谢应忠； 马红彬；

【Author】 SHEN Yan~(1,2) XIE Yingzhong~(1,2) MA Hongbin~(1,2) (1 Grassland Institute,Ningxia University,Yinchuan 750021)(2 Key Laboratory of Degraded Ecosystem Restoration and Rehabilitation in Northwest China Ministry of Education,Ningxia University,Yinchuan 750021)

【机构】 宁夏大学草业科学研究所； 宁夏大学"西北退化生态系统恢复与重建"教育部重点实验室；

【摘要】 以宁夏盐池县四墩子行政村荒漠草原为研究对象,采用野外定位试验和室内分析的方法分别研究了禁牧(CK)、自由放牧(A)、2区轮牧(B)、4区轮牧(C)和6区轮牧(D)条件下的0-5cm、5-15cm和15-25cm土层的土壤理化性质的变化,并对各处理的土壤理化性质用ANOVA法进行差异性分析。结果表明:放牧强度相同时,增加轮牧分区数有利于土壤有机质、全氮、可溶性总盐、速效磷的保持(P<0.05),影响较大的土层为0-5cm和5-15cm;轮牧对速效钾含量和pH值的影响不大(P>0.05),但使水解氮含量降低((P<0.05);轮牧分区的增加有利于土壤表层(0-5cm)粘粒的形成。更多还原

【Abstract】 The research object was the desert sttepe of Sidunzi administrative village in Yanchi county,Ningxia. Using locating field experiment and indoor process analyzed effects on properties of different depth of soil (0-5cm,5-15cm and 15-25cm) under different rotation grazing modes in desert steppe including no grazing (CK),freely herd(B ),two areas rotational grazing(B ),four areas rotational grazing(C ) and six areas rotational grazing(D).The results showed that under the same grazing intensity,increasing the numbers of rotation grazing areas was advantageous to keep the content of the soil organic matter,total N,soluble salt and quickly available P(P<0.05).The effects of rotation grazing on quickly available K content and pH were not notable(P>0.05 ),but the content of hydrolysable nitrogen decreased.Increasing the numbers of rotation grazing areas increased the Clay Particles content of soil surface layer(0-5cm).更多还原