湿地松林分结构调整对土壤活性有机碳的影响  

Effects of stand structure regulation on soil labile organic carbon in Pinus elliottii plantation

作　　者：谭桂霞[1,2] 刘苑秋[2] 李莲莲[2] 刘武[2] 昝玉亭 霍炳南 何木姣 

机构地区：[1]江西农业大学理学院,南昌330045 [2]江西农业大学林学院,南昌330045

出　　处：《应用生态学报》2014年第5期1307-1312,共6页Chinese Journal of Applied Ecology

基　　金：中国科学院战略性先导科技专项(XDA05050205);国家公益性行业专项(200904015)资助

摘　　要：以21 a湿地松纯林为对照,研究了间伐后补植阔叶树(间伐补阔,补植枫香)对不同年限(3、6、9 a)湿地松林分和21 a湿地松×枫香混交林土壤活性有机碳的影响.结果表明:间伐补阔后,6和9 a湿地松林分的土壤可溶性有机碳(DOC)、易氧化有机碳(ROC)和微生物生物量碳(MBC)含量均比21 a湿地松纯林显著增高;21 a湿地松×枫香混交林的土壤各活性碳组分含量显著高于3、6、9 a湿地松林分,其DOC、ROC和MBC含量分别比21 a湿地松纯林增加113.1%、53.3%和54.6%.说明间伐补阔结构调整是改善人工湿地松纯林土壤生态功能的有效措施.Taking 21-year-old Pinus elliottii pure plantation as the control, effects of enrichmentplanting with broadleaf trees （Liquidambarfornosana） after thinning the conifer trees （P. elliottii）on soil labile organic carbon of different plantations, including 3-year-old, 6-year-old, 9-year-oldP. elliottii and 21-year-old P. elliottii-L, fornosana mixed plantations, were investigated. The resuits showed that the contents of soil dissolved organic carbon （ DOC）, readily oxidizable organic carbon （ROC）, and microbial biomass carbon （MBC） significantly increased in the 6-year-old and 9-year-old plantations compared with those in the 21-year-old P. elliottii pure plantation. Soil labile or-ganic carbon contents in the 21-year-old P. elliottii-L, fornosana mixed plantation increased significantly than those in 3-year-old, 6-year-old, 9-year-old stands, and the DOC, ROC and MBC contentsincreased by 113.1%, 53.3% and 54.6%, respectively, compared with those in the 21-year-oldP. elliottii pure plantation. The results suggested that replanting with broadleaf trees are an effectivemeasure to improve the soil ecological function in pure P. elliottii plantation.

关 键 词：土壤活性有机碳 湿地松人工林 林分结构调整 

分 类 号：S791.246[农业科学—林木遗传育种]