Vertical Distribution of the Soil Microbial Biomass Carbon in Rubber Plantations with Different Ages

Abstract

Abstract: The rubber plantations with the chronosequences of 4 a,12 a,19 a,24 a and 29 a were selected to investigate the vertical variations of the soil microbial biomass carbon(SMBC)and their relationships with the ratio of soil organic carbon(SOC)and soil nutrients.The results showed that SMBC in all the 5 different aged rubber plantations increased with soil depth and varied from 28.87 to 138.71(mg/kg).The ratios of SMBC :SOC in the rubber plantations were between 0.66%～2.10%,therefore the soil carbon was in accumulating state.In addition,markedly positive correlation was identified between SMBC and SOC,soil total nitrogen and soil total phosphorus,correlation coefficient R>72%.

Key words: rubber plantation, soil microbial biomass carbon, soil organic carbon

CLC Number:

WANG Chunyan, CHEN Qiubo, LI Guangming, AN Feng, YANG Lifu, WANG Zhenhui. Vertical Distribution of the Soil Microbial Biomass Carbon in Rubber Plantations with Different Ages[J]. FOREST RESOURCES WANAGEMENT, 2012, (2): 59-64.

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