不同放牧方式对中蒙典型草原土壤理化特性的影响

Effect of Grazing on Physical and Chemical Characteristics in Stipa Steppe between China and Mongolia

基于中蒙典型草原不同放牧方式,研究了不同放牧方式下中蒙典型草原土壤理化特性。研究结果显示,蒙古四季游牧样地和内蒙古两季轮牧样地除砂土、pH和全钾含量低于内蒙古四季轮牧和定居样地外,其他性状均高于内蒙古四季轮牧和定居样地。土壤理化特性间相关分析表明,土壤水分与砂土间呈显著负相关(P<0.05),与有机质、C/N、碱解氮、全磷、速效磷和速效钾间呈极显著正相关(P<0.01);土壤其他理化特性间也存在一定相关性。群落多样性指数与土壤特性间相关分析表明,群落多样性指数与砂土、pH及全钾间呈负相关,与其他土壤特性间存在正相关关系。

Based on a different grazing method in Mongolian typical steppe, soil physical and chemical characteristics were investigated. The result showed that soil characteristics at FSNG, TSRG were higher than FSRG and SG except for arenaceous land, pH and kalium. Correlation of soil characteristics showed that between the soil moisture and arenaceous land was a significant negative correlation （P 〈 0. 05 ）, and organic matter, C / N, alkaline hydrolysis nitrogen, total phosphorus, available phosphorus, available kalium was highly significant positive correla- tion （P 〈0. 01 ）. There was a correlation among the soil other characteristics. Correlative analysis between Shannon-wiener index and soil characteristics showed that there was negative correlation between Shannon-wiener index and arenaceous land, pH, kalium, while it positive correlation between Shannon-wiener and other soil characteristics.