严重侵蚀退化马尾松林地植被恢复土壤养分的制约性因子  

Soil Nutrient Restriction Factors in Serious Eroded and Degraded Pinus Massoniana Woodland

作　　者：刘根华[1,2] 查轩[1,2] 周文芳[1,2] 白永会[1,2] 康佩佩[1,2] 王庚[1,2] 黄少燕[1,2] 

机构地区：[1]福建省亚热带资源与环境重点实验室,福建福州350007 [2]福建师范大学地理研究所,福建福州350007

出　　处：《水土保持通报》2016年第5期34-39,共6页Bulletin of Soil and Water Conservation

基　　金：国家科技支撑计划项目"强度侵蚀区退化系统修复关键技术的集成与示范"(2014BAD15B02);国家重点基础研究发展计划973项目"南方红壤区水土流失综合治理范式及调控机理研究"(2007CB407207)

摘　　要：[目的]揭示马尾松(Pinus massoniana)林地植被恢复的土壤养分制约性因子,为严重侵蚀退化马尾松林地植被恢复提供理论依据。[方法]通过在福建省长汀县河田镇花岗岩风化红壤区,植被恢复差异较大的4种马尾松样地的0—5,5—20,20—40cm的土壤养分试验分析。[结果](1)恢复较差的马尾松林地的有机质、全氮、全磷、速效磷、全钾、速效钾含量均较低,土壤保肥能力差,养分易随土壤侵蚀而流失。(2)所有样地的有机质、全氮、全磷、速效磷,速效钾含量变化规律基本上为:恢复较差<恢复中等<恢复较好<恢复好。(3)有机质、全氮、全磷、速效磷,速效钾极显著正相关(p<0.01),且在第1主成分上的载荷分别为0.921,0.931,0.974,0.906,0.874。(4)4种恢复样地土壤表层全钾差异不显著,其他层土壤规律不明显,植被恢复好的样地的pH值最小,但是马尾松林下植被生长良好。[结论]有机质、全氮、全磷、速效磷、速效钾植是马尾松林地植被恢复主要制约因子,全钾、pH值不是马尾松林地植被恢复制约性因子。[Objective] We aim to reveal soil nutrient limiting factors of vegetation restoration in Pinus massoniana forests, in order to provide a theoretical basis for the restoration of the degraded P. massoniana forests.[Methods] The experimental analysis of chemical properties was conducted in four completely different forest vegetation plots at 0-5, 5-20 and 20-40 cm depths of soil layers in the granite weathered red soil region of Hetian Town, Changting County, Fujian Province.[Results] （1） The organic matter, total nitrogen, total phosphorus, available phosphorus, total potassium, available potassium were lower in the degraded P. massoniana forest soil. The ability of soil keeping fertilizer was poor, and fertility was lost easily with soil erosion. （2） In all plots, the variation of organic matter, total nitrogen, total phosphorus, available phosphorus, potassium showed as：poor recovery 〈 moderate recovery 〈 relative good recovery 〈 good recovery. （3） Organic matter, total nitrogen, total phosphorus, available phosphorus, available potassium showed significant positive correlations（p〈0.01）, and the load on the first principal component were 0.921,0.931,0.974,0.906 and 0.874, respectively. （4） The variation of total K in four restored plots was not significant in surface soil, and there was not obvious rule in the other soil layer. The pH value of good restored plot was minimum, and vegetation under P. massoniana could grow well.[Conclusion] Organic, total nitrogen, total phosphorus, available phosphorus, available potassium are the main limiting factors in vegetation restoration, and the total potassium, pH value are not the main limiting factors in vegetation restoration.

关 键 词：马尾松林地 土壤养分 植被恢复 制约性因子 

分 类 号：S157.1[农业科学—土壤学] S714.6[农业科学—农业基础科学]