Tang Guoyon, Huang Daoyou, Tong Chengli, Zhang Wenju, Xiao Heai, Su Yirong, Wu Jinshui
Key Laboratory of Subtropical Agro-Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China.
Ying Yong Sheng Tai Xue Bao. 2006 Mar;17(3):429-33.
In this paper, 535 soil samples (0 to approximately 20 cm) were taken from the woodland, orchard, upland, and paddy field in the hilly red soil region of south China, and the quantitative characteristics of soil organic carbon (SOC) and soil microbial biomass carbon (SMB-C) were studied. The results showed that SOC content was the highest (16.0 g x kg(-1)) in paddy field and the lowest (8.4 g x kg(-1)) in woodland, while SMB-C content was the highest in paddy field (830 mg x kg(-1)) and the lowest in orchard (200 mg x kg(-1)). There was a highly significant positive correlation (P < 0.01) between the contents of SOC and SMB-C in the four land-use types. It was suggested that the changes of SMB-C content could sensitively indicate the dynamics of SOC. The transition from woodland to orchard or cultivated land in hilly red soil region would not decrease the SOC content.
本文采集了中国南方丘陵红壤区林地、果园、旱地和水田0至约20厘米的535份土壤样本，研究了土壤有机碳（SOC）和土壤微生物生物量碳（SMB-C）的定量特征。结果表明，水田中SOC含量最高（16.0克/千克），林地中最低（8.4克/千克），而SMB-C含量在水田中最高（830毫克/千克），果园中最低（200毫克/千克）。四种土地利用类型中SOC和SMB-C含量之间存在极显著正相关（P<0.01）。研究表明，SMB-C含量的变化能敏感地指示SOC的动态变化。丘陵红壤区从林地向果园或耕地的转变不会降低SOC含量。
