桂西北干热河谷区马尾松人工林土壤理化特性  

Study on Soil Physical and Chemical Characteristics of Pinus massoniana Plantations in Dry-hot Valley of the Northwest of Guangxi

作　　者：何广琼 黄承标[2] 曹继钊[3] 马承彪 黄新荣 李保平[2] 

机构地区：[1]广西田林县乐里林场,广西乐里533500 [2]广西大学林学院,广西南宁530005 [3]广西林科院,广西南宁530001

出　　处：《安徽农业科学》2010年第3期1610-1613,1649,共5页Journal of Anhui Agricultural Sciences

基　　金：广西百科计字[2007-19]"桂西北干热河谷区马尾松大径材培育技术研究"项目

摘　　要：[目的]为桂西北地区营造马尾松林提供参考价值。[方法]在南盘江南缘河谷地带，选择6、10、14年生马尾松人工林设置土壤剖面，按国家颁布标准测定其土壤理化性质。[结果]0～100cm土层密度为0．997～1．606g/cm3，总孔隙度为42．56％～61．03％，通气度为4．36％-39．45％；0～40cm土层pH值为4．33～5．33，有机质含量为9．02～49．99∥kg，全N含量为0．54～1．58g/kg，全P为0．35—0．86g／kg，全K为6．69～20．68g／kg。[结论]桂西北干热河谷区马尾松人工林土壤容重较大、通气性一般，土壤有机质以及N,P、K养分含量偏低。[ Objective ] The aim of the study was to provide important reference value for afforcsting Pinus massoniana plantations. [ Method ] In the Nanpan river valley margin area, 6,10,14 years-old Pinus massoniana plantation soil profile were selected, by the state standards the soil physical and chemical properties were determined. [ Result ] The results showed that ： The soil bulk density of 0 - 100 cm soil layer were 0. 997 - 1. 606 g/cm3 ; total porosity were 42.56% - 61.03% ; ventilation rate were 4.36% - 39.45%. The pH value of 0 - 40 cm soil layer were 4.33 - 5.33, organic matter content were 9.02 - 49.99 g/kg, full N were 0.54 - 1.58 g/kg, full P were 0.35 - 0.86 g/kg, full K were 6.69 -20.68g/kg. [ Conclusion]The research demonstrated that the soil bulk density were larger,aeration were common, soil organic matter and N, P, K nutrient content were lower in Pinus rnassoniana plantations in dry-hot valley of the northwest of Guangxi.

关 键 词：马尾松人工林 土壤理化性质 桂西北干热河谷区 

分 类 号：S714.2[农业科学—林学]