酚酸对杨树人工林土壤养分有效性及酶活性的影响  

Effects of exogenous phenolic acid on soil nutrient availability and enzyme activities in a poplar plantation

作　　者：王延平[1,2] 王华田[1,2] 许坛[1] 倪桂萍[1] 姜岳忠[3] 

机构地区：[1]山东农业大学林学院,山东泰安271018 [2]国家林业局泰山森林生态系统定位研究站,山东泰安271018 [3]山东省林业科学研究院,济南250014

出　　处：《应用生态学报》2013年第3期667-674,共8页Chinese Journal of Applied Ecology

基　　金：国家基础研究发展计划项目(2012CB416904);国家自然科学基金项目(31070550;31270670);山东省优秀中青年科学家奖励基金项目(BS2012NY006)资助

摘　　要：采用离子交换树脂膜作为根系模拟器,研究杨树人工林土壤在酚酸环境中养分有效性及酶活性的变化.结果表明:酚酸能显著影响杨树人工林土壤养分有效性和土壤酶活性,且二者受酚酸的影响具有显著的浓度效应和时间效应.随酚酸浓度增大,土壤中NH4+-N、NO3--N的提取量均显著下降.在高浓度酚酸环境中,PO43-、Mn2+的有效性显著提高,而K+、Fe3+的有效性被显著抑制;脲酶和碱性磷酸酶活性显著降低,而过氧化氢酶和多酚氧化酶活性则呈显著升高的趋势.随培养时间的延长,土壤中NH4+-N、PO43-、Mn2+的有效性逐渐增加,而NO3--N、K+、Fe3+、Zn2+的有效性显著降低.相关分析表明,脲酶、多酚氧化酶、碱性磷酸酶活性与NO3--N、K+、Fe3+、Mn2+等的有效性相关性较高.By using ion exchange resin membrane as a plant root simulator, this paper studied the variations of soil nutrient availability and enzyme activities in a poplar plantation after applying phe- nolic acid. The exogenous phenolic acid had significant effects on the soil nutrient availability and enzyme activities, and the effects were concentration- and time dependent. With increasing phenolic acid concentration, the extraction mass of soil NH4＋-N and NO3--N decreased significantly. At high concentration phenolic acid, soil PO43- and Mn2＋ availability increased significantly while soil K＋ and Fe3＋ availability was in adverse, and soil urease and phosphatase activities had a significant de- crease while soil catalase and polyphenol oxidase activities increased significantly. With the elonga- tion of incubation time, the availability of soil NH4＋-N, PO43-, and Mn2＋ increased gradually, while that of soil NO3--N, K＋, Fe3＋, and Zn2＋ decreased significantly. The correlation analysis showed that the availability of soil NO3--N, K＋, Fe2＋, and Mn2＋ had close correlations with the ac- tivities of soil urease, polyphenol oxidase, and phosphatase.

关 键 词：杨树人工林 离子交换树脂膜 养分有效性 土壤酶活性 典型相关分析 

分 类 号：S714[农业科学—林学]