Four years of free-air CO2 enrichment enhance soil C concentrations in a
Chinese wheat field |
| |
Authors: | ZHONG Shuang LIANG Wenju LOU Yilai LI Qi and ZHU Jianguo |
| |
Institution: | 1. Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China 2. Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China 3. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
| |
Abstract: | Elevated atmospheric CO2 can influence soil C dynamics in agroecosystems. The e ects of free-air CO2 enrichment (FACE) and N
fertilization on soil organic C (Corg), dissolved organic C (DOC), microbial biomass C (Cmic) and soil basal respiration (SBR) were
investigated in a Chinese wheat field after expose to elevated CO2 for four full years. The results indicated that elevated CO2 has
stimulative e ects on soil C concentrations regardless of N fertilization. Following the elevated CO2, the concentrations of Corg and
SBR were increased at wheat jointing stage, and those of DOC and Cmic were enhanced obviously across the wheat jointing stage and
the fallow period after wheat harvest. On the other hand, N fertilization did not significantly a ect the content of soil C. Significant
correlations were found among DOC, Cmic, and SBR in this study. |
| |
Keywords: | dissolved organic C free air CO2 enrichment microbial biomass C N fertilization soil basal respiration soil organic C |
本文献已被 维普 万方数据 ScienceDirect 等数据库收录! |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|