热带作物学报2017，Vol.38Issue(3)：450-455,6.DOI:10.3969/j.issn.1000-2561.2017.03.011
不同林龄桉树人工林的土壤理化性质及脲酶活性
Soil Physical and Chemical Properties and Soil Urease Activity in Eucalyptus Plantation of Different Planting Age
摘要
Abstract
In order to explore the dynamic change regularity of eucalyptus forest soil physical,chemical factors and urease activity along with forest age,and the deep relationship between urease activity,soil physical and chemical factors,spatial-temporal substitution method and path analysis were applied to eucalyptus trees of different ages in Danzhou.Results showed that soil physical,chemical factors and soil urease activity varied significantly,but all decreased with the increase of stand age.The highest urease activity was appeared 0.901 mg/g in 2-year-old forest land,0.533 mg/g,0.499 mg/g in 4-year and 6-year-old forestland respectively.Considering correlation and path analysis,effects of soil factors on urease activity (in absolute value) was in the order of total phosphorus (0.719) ＞ water-soluble organic nitrogen (0.519) ＞ total nitrogen (0.508) ＞ Water content (0.463) ＞ Total organic carbon (0.170) ＞ Bulk density (0.154) ＞ water-soluble organic carbon (0.143).By integrating the direct and indirect effects of each factor we could get the conclusions that total nitrogen and water-soluble organic nitrogen were the direct correlators that constrain urease activity,WSOC was a strong indirect correlators that exerted significant influence on urease activity also.关键词
桉树林土壤/脲酶活性/相关分析/通径分析Key words
eucalyptus forest soil/urease activity/correlation analysis/path analysis分类
农业科技引用本文复制引用
梁卿雅,王旭,刘文杰,邹耀进,王鑫瑶,李超,唐鹏,程毅康..不同林龄桉树人工林的土壤理化性质及脲酶活性[J].热带作物学报,2017,38(3):450-455,6.基金项目
中国科学院战略性先导科技专项子课题(No.XDA05050208-5,XDA05050206,XDA05050302-2). （No.XDA05050208-5,XDA05050206,XDA05050302-2）
