Effects of biochar addition on the NEE and soil organic carbon content of paddy fields under water-saving irrigation.

作者: Shihong Yang , Xiao Sun , Jie Ding , Zewei Jiang , Junzeng Xu

DOI: 10.1007/S11356-019-04326-8

关键词:

摘要: The addition of biochar has been reported as a strategy for improving soil fertility, crop productivity, and carbon sequestration. However, information regarding the effects on cycle in paddy fields under water-saving irrigation remains limited. Thus, field experiment was conducted to investigate net ecosystem exchange (NEE) CO2 organic (SOC) content Taihu Lake region China. Four treatments were applied: controlled (CI) without control (CA), CI with at rate 20 t·ha−1 (CB), 40 t·ha−1 (CC), flooding (FI) (FC). Biochar increased rice yield water use efficiency (IWUE) by 24.0–36.3 33.4–42.5%, respectively, compared control. In addition, NEE fields. average CB CC 2.41 30.6% higher than that CA, respectively. increasing effect considerably better those other treatments. Apart from mode also identified an influencing factor. management 17.6% FI management. Compared total absorption 10.0%, whereas decreased 13.8%. SOC, dissolved carbon, microbial biomass contents. Therefore, joint regulation is good technique maintaining yield, IWUE, promoting fertility. Furthermore, when amended 20 t·ha−1, will be sequestering

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