摘要
本文对赣江源自然保护区低效湿地松和马尾松林地土壤状况进行分析,结果表明:湿地松林地土壤与马尾松林下土壤相比,有机质含量均值7.82 g·kg^(-1)(湿地松)>3.83 g·kg^(-1)(马尾松),碱解氮60.78 mg·kg^(-1)(湿地松)>41.61 mg·kg^(-1)(马尾松),速效磷0.78 mg·kg^(-1)(湿地松)>0.60 mg·kg^(-1)(马尾松)。总体而言湿地松样地土壤养分稍高于马尾松样地,但赣江源低效针叶林林地土壤肥力偏低,土壤养分匮乏。2种针叶林地土壤酶活性表现,脲酶和过氧化氢酶在湿地松林下土壤中活性高于马尾松林下,脲酶2.538 mg(NH3-N)·g^(-1)(湿地松)>2.158 mg(NH3-N)·g^(-1)(马尾松),过氧化氢酶2.604mL KMnO4·g^(-1),干土(湿地松)>2.239 mL KMnO4·g^(-1)干土(马尾松)。林地养分含量低酶活性差是林分质量低效的主要原因。
In this study,analysis the soil environmental quality of low effect Pinus elliottii and P.massoniana in Ganjiangyuan National Nature Reserve,results showed that,comparing the soil environmental quality of P.elliottii with that of P.massoniana,the mean value of Organic Matter 7.82 g·kg^-1(P.elliottii)>3.83 g·kg^-1(P.massoniana),Available Nitrogen 60.78 mg·kg^-1(P.elliottii)>41.61 mg·kg^-1(P.massoniana),Available Phosphorus 0.78 mg·kg^-1(P.elliottii)>0.60 mg·kg^-1(P.massoniana).Generally speaking,the soil nutrient of P.elliottii sample plot is slightly higher than that of P.massoniana,but the soil fertility of low-efficiency coniferous forest land in Ganjiang source is low and the soil nutrient is deficient.In comparison of soil enzyme activities in two coniferous forests.The activity of Urease and Catalase under soil of P.elliottii was higher than P.massoniana,Urease 2.538 mg(NH3-N)·g^-1(P.elliottii)>2.158 mg(NH3-N)·g^-1(P.massoniana),Catalase 2.604 mL KMnO4·g^-1,dry soil(P.elliottii)>2.239 mL KMnO4·g^-1 dry soil(P.massoniana).The main reasons for inefficient stand quality was low nutrient content and poor enzyme activity.
作者
王丽艳
刘光正
周晨
金洪平
余正良
Wang Liyan;Liu Guangzheng;Zhou Chen;Jin Hongping;Yu Zhengliang(Jiangxi Academy of Forestry,Nanchang Jiangxi 330013,China;Ganjiangyuan Nature Reserve Administration,Shicheng Jiangxi 342700,China)
出处
《南方林业科学》
2019年第2期1-7,共7页
South China Forestry Science
基金
国家科技支撑计划项目"长江中下游低山丘陵防护林空间结构优化与质量调控技术研究与示范"(项目编号:2015BAD07B40)
江西省林业科学院重点研发计划项目"赣江源针叶林生态化改造关键技术及效益评价研究"(项目编号:2016510801)
关键词
湿地松林
马尾松林
土壤养分
土壤酶活性
Pinus elliottii forest
P.massoniana forest
soil nutrient
soil enzyme activity
