期刊论文

Properties of Mineralizable Carbon(MC)Pool during Re-vegetation on Sloping-land with Purple Soils in Hengyang,Hunan Province

中文

草地学报

1007-0435

2019

27

2

320-325

10.11733/j.issn.1007-0435.2019.02.007

湖南省科技厅项目(S2006N332) 湖南省教育厅科学研究项目(16C0559) 湖南环境生物职业技术学院南岳学者基金项目资助.

本校为其他机构

本研究采用空间序列代替时间序列方法,研究衡阳紫色土丘陵坡地植被恢复过程0~10、10~20与20~40cm土层土壤可矿化碳库特征。结果表明:恢复过程中土壤有机碳含量、可矿化碳含量和矿化速率随土层加深而减少,随恢复进程而增加;矿化率随恢复进程增加,随土层加深先减后增再分布均匀;累积矿化排放量及其速率随恢复进程增加,其速率随培养时间延长而减小;qCO2值随恢复进程和土层加深而递减;土壤可矿化碳含量与凋落物现存量、质量损失率的相关系数r分别为-0.698^*和0.915^**(*P

By using the spatial series to replace time series,a test was conducted to study the properties of mineralizable carbon (MC) pool in 0~10,10~20 and 20~40 cm soil layers during re-vegetation on sloping-land with purple soils in Hengyang,Hunan Province. It observed that the contents of soil organic carbon (SOC) and MC as well as the carbon mineralization rate (MR) decreased with increasing soil depth but increased with the process of re-vegetation;MC/SOC increased with the re-vegetation process but decreased then increased and finally distributed evenly with increasing soil depth;The amount of c...