黔南马尾松人工林土壤水稳性团聚体的特征及养分效应  

Characteristics and Nutrient Effect of Water-stable Aggregates in Soil of Pinus massoniana Plantation in Qiannan Prefecture

作　　者：许丰伟[1] 丁访军 戴全厚[1] 朱军 杨通泽[1] 

机构地区：[1]贵州大学林学院,贵州贵阳550025 [2]贵州省林业科学研究院,贵州贵阳550005

出　　处：《贵州农业科学》2011年第4期106-109,113,共5页Guizhou Agricultural Sciences

基　　金：国家林业局公益专项子项目"西南地区森林净生产力多尺度长期观测与评价研究"(200704005/WB03)

摘　　要：为了加强对人工林的经营、管理,进一步改善生态环境,以黔南马尾松人工林土壤为研究对象,对不同层次土壤水稳性团聚体和土壤养分指标变化进行了分析,并研究了水稳性团聚体及各养分之间的关系。结果表明:不同龄林地土壤,>0.25 mm水稳性团聚体含量变化为近熟林地>幼龄林地>中龄林地>成熟林地。不同龄林地不同土壤层次的水稳性团聚体呈现出下降趋势。马尾松林地不同土壤层次全氮、速效氮、全磷、速效磷、速效钾和有机质的含量都随着土层深度增大而呈下降趋势。幼龄林地、中龄林地的土壤>0.25 mm的水稳性团聚体与土壤养分的相关性不显著,而近熟林地、成熟林地的土壤>0.25 mm的水稳性团聚体与土壤养分之间的相关性较显著。The water-stable aggregate and nutrient index in soils with different depths of Pinus massoniana plantation in Qiannan prefecture and the relation between water-stable aggregate and different nutrients were studied to improve plantation management and biological environment further.The results showed that change of 0.25mm water-stable aggregate content in plantation soils with different age was nearly mature forest land young forest land immature forest land mature forest land,the water-stable aggregate content in different soil layers of forest land with different ages presented a declining trend,total N,rapid available P,rapid available K and organic matter content in different soil layers of Pinus massoniana plantation reduced with the increase of soil depth,there was no significant relation between 0.25mm water-stable aggregate content and soil nutrient in young forest land and immature forest land,and there was a significant relation between 0.25mm water-stable aggregate content and soil nutrient in nearly mature forest land and mature forest land.

关 键 词：马尾松人工林 水稳性团聚体 土壤养分 耦合关系 

分 类 号：S791.248[农业科学—林木遗传育种]