毛竹林土壤有机碳及微生物量碳特征研究  

A Study on the Characteristics of Soil Organic Carbon and Microbial Biomass Carbon in Phyllostachy edulis Plantation

作　　者：肖复明[1] 范少辉[2] 汪思龙[3] 于小军[3] 刘广路[2] 邓旺华[2] 

机构地区：[1]江西省林业科学院,江苏南昌330032 [2]国际竹藤网络中心,北京100102 [3]中国科学院会同森林生态实验站,湖南会同森林生态系统国家野外观测研究站,湖南会同418307

出　　处：《水土保持学报》2008年第6期128-131,共4页Journal of Soil and Water Conservation

基　　金：国家“十一五”科技支撑计划(2006BAD19B0104);江西省青年科学家(井冈之星)培养对象计划

摘　　要：通过对湖南会同林区集约经营毛竹林地土壤有机碳和微生物量碳进行测定,结果表明,毛竹林地土壤(0-60 cm)有机碳和微生物量碳含量平均值分别为1.727%和551.84 mg/kg,不同土壤层次有机碳和微生物量碳含量差异极显著,其中,0-20 cm土层有机碳含量平均值为2.607%,分别是20-40 cm和40-60 cm土层有机碳含量的1.67倍和2.57倍;0-20 cm土层的微生物量碳占土壤总微生物量碳的58.9%,分别是20-40 cm和40-60 cm土层的2.69倍和3.08倍。不同季节间土壤微生物量碳有明显变化规律,即土壤微生物量碳含量1-7月份呈上升的趋势,7月达到最大值,8-12月份呈逐渐下降趋势;不同季节间有机碳含量差异不显著。毛竹林地土壤表层土壤微生物量熵为1.118 6%,与40-60 cm土壤层相当,略高于20-40 cm土壤层,说明毛竹林不同土壤层次有机碳积累强度相当。The soil organic carbon（SOC） and microbial biomass carbon （MBC） content of intensive management Moso bamboo （Phyllostachy edulis） plantation in Huitong forest region, Hu＇nan Province were analyzed in this paper. The results showed that the Moso bamboo plantation（0-60 cm layer）soil organic carbon and microbial biomass carbon content averaged were 1. 727% and 551.84 mg/kg, respectively. There were very significant differences in different soil layer of soil organic carbon（SOC） and microbial biomass carbon. The soil organic carbon content in 0-20 cm layer were 2. 607%, which is 1.67 times and 2.57 times than that in 20-40 cm and 40-60 cm layer, respectively. The microbial biomass carbon content in 0-20 cm layer account for 58.9% of the total microbial biomass carbon, which is 2.69 times and 3.08 times than that in 20-40 cm and 40--60 cm layer, respectively. There were not significant differences in different season of soil organic carbon, however, there were very significant differences of microbial biomass carbon. The microbial biomass carbon content showed an increasing tendency from January to July and showed the downtrend from August to December. Soil microbial quotient in Moso bamboo plantation was 1. 118 6%, as same as 40--60 cm soil layer, slightly higher than the 20--40 cm soil layer. That is to say, different Moso bamboo soil layer had similar abilities to accumulated soil organic carbon.

关 键 词：毛竹林 土壤有机碳 微生物量碳 

分 类 号：S154.3[农业科学—土壤学] S153.621[农业科学—农业基础科学]