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1、贵州农业科学2010,38(9):81~83GuizhouAgriculturalSciences[文章编号]100123601(2010)092058420081203杉木人工林土壤理化性质及酶活性的变化规律舒洪岚(江西财经大学,江西南昌330032)[摘要]为揭示杉木人工林土壤肥力变化规律,研究了江西省景德镇市枫树山林场不同连栽代数、不同林龄的杉木人工林土壤理化性质和酶活性的变化。结果表明:随着林龄的增长,除土壤容重趋于增加外,土壤pH、阳离子交换量、全氮、速效钾及酸性磷酸酶、过氧化氢酶、尿酶和蛋白酶的活性均有所降低;随着土壤深度增加,土壤pH、阳离子交换量、氮磷钾养分以及酶活性均呈下
2、降趋势。二代杉木林的土壤容重、pH、阳离子交换量和速效磷的含量高于一代杉木林,但土壤全氮、速效钾的含量和酶活性低于一代杉木林;土壤酸性磷酸酶、过氧化氢酶、脲酶、蛋白酶与土壤pH、有机质、全氮、速效钾呈极显著或显著正相关,土壤酸性磷酸酶、过氧化氢酶、脲酶与土壤速效磷呈极显著正相关。[关键词]杉木人工林;连栽;林龄;土壤肥力;理化性质;酶活性[中图分类号]S158.1[文献标识码]ASoilPhysicochemicalPropertyandEnzymaticActivityofChineseFirPlantationSHUHong2lan(JiangxiUniversityofFinance
3、andEconomics,Nanchang,Jiangxi330032,China)Abstract:ThesoilphysicochemicalpropertyandenzymaticactivityofChinesefirplantationswithdifferentcontinuousplantinggenerationsanddifferentforestageinFengshushanforestfarmofJiangxiprovincewerestudiedtorevealthechangeregulationofsoilfertilityofChinesefirplanta
4、tion.TheresultsshowedthatpH,CEC,totalNcontent,availableKcontentandactivityofacidphosphatase,catalase,ureaseandproteasedecreasedwiththeincreaseofforestageexceptforsoilbulkdensity,thepH,CEC,N,PandKnutrientsandenzymaticactivitydecreasedwiththeincreaseofsoildepth.Thesoilbulkdensity,pH,CECandavailableP
5、contentofthesecondgenerationofChinesefirplantationwerehigherthanthatofthefirst,butthetotalNandavailableKcontentandenzymaticactivitywaslowerthanthatofthefirstgenerationofChinesefirplantation.Thereweresignificantorverysignificantpositivecorrelationsbetweenactivityofsoilacidphosphatase,catalase,ureas
6、eandproteaseandpH,organicmattercontent,totalnitrogencontent,availableKcontent.Therewereverysignificantpositivecorrelationsbetweenactivityofsoilacidphosphatase,catalaseandureaseandavailablePcontent.Keywords:Chinesefirplantation;continuousplanting;forestage;soilfertility;physicochemicalproperty;enzy
7、maticactivity杉木是我国南方重要的用材树种。近年来,由1材料与方法于高度的集约经营、并伴随着某些不合理的营林和栽培措施,如树种单纯、全垦整地、大面积皆伐、在同1.1试验地概况一林地上连续栽杉等,加上杉木自身生物学特性等试验地为江西省景德镇市枫树山林场浮东分原因,致使杉木人工林生产力下降和地力退化现象场,位于景德镇市东北端(E117b33c~117b33c,普遍存在[123]。如何维护和提高杉木林地土壤肥力,N
