当前位置：
X-MOL 学术
›
Field Crops Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Fertilization management and greenhouse gases emissions from paddy fields in China: A meta-analysis
Field Crops Research ( IF 5.6 ) Pub Date : 2024-07-05 , DOI: 10.1016/j.fcr.2024.109490 Yanning Liang , Lihua Xue , Pingping Jia , Sheng Zhang , Yi Hu , Kazem Zamanian , Xiaoning Zhao
Field Crops Research ( IF 5.6 ) Pub Date : 2024-07-05 , DOI: 10.1016/j.fcr.2024.109490 Yanning Liang , Lihua Xue , Pingping Jia , Sheng Zhang , Yi Hu , Kazem Zamanian , Xiaoning Zhao
The contribution of rice paddy soils to greenhouse gases (GHGs) emissions and global warming has attracted widespread attention. There are studies on the local effects of fertilizers on soil GHGs emissions, but few have looked at the comprehensive and comparative effects of fertilization management, considering soil and environmental characteristics. Our meta-analysis used data from 83 Chinese paddy fields to investigate the effects of NPK (nitrogen, phosphorus and potassium), NPKS (NPK with straw return), NPKM (NPK with manure), and NPKB (NPK with biochar) on CO, CH and NO emissions compared to the unfertilized fields (control) under single rice in the south (SRS), single rice in the north (SRN) and double rice (DR). The order of increased global warming potential (GWP) was NPKB (10 %) < NPK (20 %) < NPKM (70 %) < NPKS (140 %). The highest GHG increases were 60 % for CO and 270 % for NO under NPKM, and 180 % for CH under NPKS, while the lowest were 25 % for CO, 2 % for CH, and 5 % for NO under NPKB compared to control. The NPKB positively increased CH by 38 % in SRN, while NPK resulted in a 285 % increase in NO emission in SRS. The CO, CH, and NO reached the highest increased values of 18×10, 500, and 2 kg ha, respectively when the N input under NPKM and NPKS was 200–300 kg ha. Such a relatively high N input only increased the yield by 1–4 t ha. In contrast, a 30 %-50 % reduction in N input (equivalent to 130–260 kg C kg), with a yield increase of about 4–5 t ha, decreased CO, CH, and NO emissions by 86 %, 66 %, 75 % respectively (GWP by 12 %) under NPK and NPKB. The soil properties are also the main controllers of GHGs from paddy soils, where the highest GHGs were associated with soils with clay loam, pH=5–6, and C/N=10. The estimated cumulative emissions of CO, CH, and NO under NPK in China in 2021 were 430, 7.5, and 0.038 Tg, respectively, while the addition of NPKB led to a reduction of the mentioned GHGs by 23 %, 43 %, and 47 % (GWP by 30 %), respectively. Reducing inorganic nitrogen inputs and incorporating biochar, but cautiously applying manure and straw in fertilization management are win-win strategies in paddy fields to reduce GHGs and ensure rice yield. Our study highlights the importance of proper fertilization management according to rice zones and soil properties, which could decrease the GHGs emissions and bring yield and environmental benefits.
更新日期：2024-07-05
京公网安备 11010802027423号