The combined effects of nitrogen fertilizer and biochar on soil aggregation, N2O emission, and yield from a vegetable field in southeastern China

被引:0
|
作者
Han, Ying [1 ,2 ]
Ma, Jing [1 ]
Xu, Xianghua [1 ]
Lu, Xinyu [1 ]
Wang, Ziyao [1 ]
Sun, Liying [1 ]
机构
[1] Nanjing Univ Informat Sci & Technol, Sch Appl Meteorol, Key Lab Ecosyst Carbon Source & Sink, China Meteorol Adm ECSS CMA, Nanjing, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Joint Int Res Lab Climate & Environm Change ILCEC, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Key Lab Meteorol Disaster,Minist Educ KLME, Nanjing, Peoples R China
基金
中国国家自然科学基金;
关键词
Biochar; Nitrous oxide emission; Global warming potential; Greenhouse gas intensity; Soil water-stable aggregate; GREENHOUSE-GAS EMISSIONS; OXIDE EMISSIONS; SIZE DISTRIBUTION; BOVINE-URINE; IMPACT; CARBON; STRAW; PADDY; INTENSITY; AMENDMENT;
D O I
10.1007/s11356-023-29819-5
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Biochar amendment is a recently promoted agricultural management strategy that can exert distinct impacts on reducing greenhouse gas (GHG) emissions and improving soil fertility and crop productivity. This study aims to evaluate the combined effects of biochar and nitrogen (N) fertilizer on soil aggregation, nitrous oxide (N2O) emission, global warming potential (GWP), vegetable yield, and greenhouse gas intensity (GHGI). The experiments were conducted in a vegetable field with two consecutive vegetable crops in 2019 and 2020 in southeastern China. There were four treatments: control (CK), conventional N fertilizer (U), biochar applied at 15 t ha(-1) with N fertilizer (UB1), and biochar applied at 30 t ha(-1) with N fertilizer (UB2). The results indicate that while N application significantly increased N2O emission of the vegetable field, both UB1 and UB2 led to significant reductions of the total N2O emission, GWP, and yield-scaled GHGI as well as significant growth of the total vegetable crop yield compared with U. However, no significant differences have been found in N2O emission, GWP, crop yield, and yield-scaled GHGI between UB1 and UB2. Meanwhile, biochar application in addition to N fertilizer did not result in any significant change in the soil water-stable aggregate size distribution and stability compared with U. Soil water-stable aggregates smaller than 0.25 mm and those larger than 5 mm have been found to significantly impact N2O emission and vegetable yield.
引用
收藏
页码:105944 / 105953
页数:10
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