摘要
在不同放牧强度下,对东北三江平原小叶章草甸的土壤理化性状变化进行了对比研究,结果表明:(1)随着放牧强度增加,土壤水分含量减少,容重增加,变化主要体现在0～10cm的土壤表层。(2)随着放牧强度的增加,0～10cm表土层的有机质、全氮、全磷、全钾、碱解氮和速效磷含量减少,速效钾含量增加;10～20cm土层的有机质、碱解氮和速效钾含量减少,但全氮、全磷、全钾和速效磷的含量变化趋势不明显;20～30cm土层的有机质、全氮、全钾和碱解氮的含量减少,全磷含量增加,速效磷和速效钾含量的变化无明显规律。(3)不同放牧强度对土壤pH值的影响主要表现在0～10cm土层,但无规律性变化。
The comparative study of the changes of soil physical and chemical properties of Deyeuxia angustifolia meadow in northeast Sanjiang Plain was conducted. The results showed that. （1） with the increasing of grazing intensity, the content of soil moisture was reduced, but bulk density was increased, and the change was mainly occurred in the 0-10cm soil layer. （2） With the increasing of grazing intensity, the content of organic matter, total nitrogen, total phosphorus, total potassium, nitrogen and available phosphorus were decreased, but available potassium was increased in the 0-10cm soil layer. The content of organic matter, nitrogen and available K were decreased, but the total nitrogen, total phosphorus, total potassium and available phosphorus were not significantly changed in the 10-20cm soil layer. The content of organic matter, total nitrogen, total K and available nitrogen were reduced, but the content of total phosphorus was increased. The changes of the content of phosphorus and potassium were not regular. （3） The impact of different grazing intensity on soil pH mainly occurred in the 0-10cm depth, but the changes was not regular.
出处
《中国草地学报》
CSCD
北大核心
2013年第2期83-88,共6页
Chinese Journal of Grassland
基金
公益性行业(农业)科研专项经费(200903060)资助
关键词
三江平原
小叶章草甸
放牧强度
土壤理化性状
Sanjiang Plain
Deyeuxia angustifolia
Grazing intensity
Soil physicochemical properties
