期刊论文

Yuan, H.-Z.

中文

应用生态学报

1001-9332

2014

25

6

1708-1714

10.13287/j.1001-9332.20140409.006

国家自然科学基金项目（41271279,41301275）； 中国科学院仪器功能开发项目（Y323018010）； 湖南省国际与区域科技合作重点项目（2013WK4009）资助；

本校为第一机构

选择亚热带地区3种典型稻田和旱地土壤,应用碳同位素 ~(14)C-CO_2标记示踪技术结合室内模拟培养试验,研究自养微生物同化碳(“新碳”)在土壤碳库中的矿化和转化特征. 结果表明: 在100 d 的培养期内,“新碳”的矿化经历了先上升、10 d 后缓慢下降、最后渐趋稳定的3个阶段.“新碳”的矿化比例为8. 0% ~ 26. 9%,矿化速率为0. 01 ~ 0. 22 μg ~(14)C·g ~(-1)·d ~(-1), 其中,稻田土壤为0. 01 ~ 0. 22 μg ~(14)C·g~(-1)·d~(-1),旱地土壤为0. 01 ~ 0. 08 μg ~(14)C·g~(-1)·d~(-1), 而原有有机碳的矿化比例为1. 6% ~ 5. 7%,矿化速率为1. 3 ~ 25. 66 μg C·g~(-1)·d~(-1). 土壤活性碳库[可溶性...

In this study, the mineralization and decomposition of autotrophic microbe assimilated carbon (new carbon) and native organic carbon in three upland and three paddy soils in subtropical China were measured using the 14C-labelled tracer technique. The results showed that, during the 100-d incubation, the mineralization of the 'new carbon' displayed three stages: a rise in the first 10 days, a slowdown from 11-d to 50-d, and a stabilization stage after 50 d. The mineralization ratio of the 'new carbon' ranged between 8.0% and 26.9% and the mineralization rate ranged from 0.01 to 0.22 microg 14C ...