title: [Effects of exogenous phenolic acid on soil nutrient availability and enzyme activities in a poplar plantation].
abstract: 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 phenolic 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 PO4(3-) and Mn2+ availability increased significantly while soil K+ and Fe3+ availability was in adverse, and soil urease and phosphatase activities had a significant decrease while soil catalase and polyphenol oxidase activities increased significantly. With the elongation of incubation time, the availability of soil NH4+-N, PO4(3-), 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 activities of soil urease, polyphenol oxidase, and phosphatase.
authors.affiliation: College of Forestry, Shandong Agricultural University, Tai' an 271018, Shandong, China. sdauwyp@hotmail.com
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Wang
authors.forename: Hua-Tian
authors.initials: HT
authors.lastname: Wang
authors.forename: Tan
authors.initials: T
authors.lastname: Xu
authors.forename: Gui-Ping
authors.initials: GP
authors.lastname: Ni
authors.forename: Yue-zhong
authors.initials: YZ
authors.lastname: Jiang
mesh_terms: D002374:Catalase / Q000378:metabolism; D017753:Ecosystem; D005296:Ferrous Compounds / Q000032:analysis; D062385:Hydroxybenzoates / Q000737:chemistry*; D009584:Nitrogen / Q000032:analysis*; D032107:Populus / Q000254:growth & development*; D011188:Potassium / Q000032:analysis; D012987:Soil / Q000737:chemistry*; D014510:Urease / Q000378:metabolism*
chemical_list: D005296:Ferrous Compounds; D062385:Hydroxybenzoates; D012987:Soil; D002374:Catalase; D014510:Urease; C017616:phenolic acid; D009584:Nitrogen; D011188:Potassium