TY - JOUR
T1 - Ammoniated straw incorporation increases maize grain yield while decreasing net greenhouse gas budgets on the Loess Plateau, China
AU - Li, Jinchao
AU - Li, Yue
AU - Yang, Zhipeng
AU - Fang, Yanxin
AU - Li, Cheng
AU - Shi, Yulong
AU - Lin, Nanping
AU - Dong, Qinge
AU - Siddique, Kadambot H.M.
AU - Feng, Hao
AU - Wang, Naijiang
N1 - Funding Information:
This study was jointly supported by the National Key R&D Program of China ( 2021YFD1900700 ), the Project funded by China Postdoctoral Science Foundation ( 2022M722611 ), the National Natural Science Foundation of China ( 51609237 and 51879224 ), and the 111 Project ( B12007 ). We thank editors and anonymous reviewers for their valuable comments and suggestions on the manuscript.
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/8/15
Y1 - 2023/8/15
N2 - Two major concerns of sustainable agriculture are safeguarding food security and attenuating climate warming. Straw incorporation is a widely used field management measure, but issues are associated with its high carbon:nitrogen (C:N) ratio. Ammoniated straw treatments aim to reduce straw C:N ratio; however, studies on the performances of long-term ammoniated straw incorporation on maize grain yield and net greenhouse gas (GHG) budgets are still scarce. We conducted a long-term in situ trial (2012–2021) to estimate the performance of different straw utilization methods (CK, straw removal; CSI, conventional straw incorporation; ASI, ammoniated straw incorporation) on grain yield, GHG emissions, net ecosystem carbon budget (NECB), net greenhouse gas budget (NGB), and net greenhouse gas intensity (NGHGI) in maize fields. Grain yield was 8.3% and 24.7% greater with ASI than that with CSI and CK, respectively. And ASI had the lowest coefficient of variation for grain yield and the highest sustainable yield index. However, in comparison with CK, both straw incorporation methods significantly aggravated CO2 and N2O emissions, on average, by 101.0% and 107.5% (CSI) and 59.4% and 80.8% (ASI), respectively. The CK, CSI, and ASI obtained average NECB values of 38, 841, and 1556 kg C ha−1, respectively. The amount of C in soil respiration, roots, extra-root material, and straw input significantly affected NECB. NGB and NGHGI were ranked ASI < CSI < CK, which was attributed primarily to significant changes in NECB, followed by N2O emissions. These results suggested that ASI can enhance maize yield and yield stability and reduce net GHG budgets on the Loess Plateau.
AB - Two major concerns of sustainable agriculture are safeguarding food security and attenuating climate warming. Straw incorporation is a widely used field management measure, but issues are associated with its high carbon:nitrogen (C:N) ratio. Ammoniated straw treatments aim to reduce straw C:N ratio; however, studies on the performances of long-term ammoniated straw incorporation on maize grain yield and net greenhouse gas (GHG) budgets are still scarce. We conducted a long-term in situ trial (2012–2021) to estimate the performance of different straw utilization methods (CK, straw removal; CSI, conventional straw incorporation; ASI, ammoniated straw incorporation) on grain yield, GHG emissions, net ecosystem carbon budget (NECB), net greenhouse gas budget (NGB), and net greenhouse gas intensity (NGHGI) in maize fields. Grain yield was 8.3% and 24.7% greater with ASI than that with CSI and CK, respectively. And ASI had the lowest coefficient of variation for grain yield and the highest sustainable yield index. However, in comparison with CK, both straw incorporation methods significantly aggravated CO2 and N2O emissions, on average, by 101.0% and 107.5% (CSI) and 59.4% and 80.8% (ASI), respectively. The CK, CSI, and ASI obtained average NECB values of 38, 841, and 1556 kg C ha−1, respectively. The amount of C in soil respiration, roots, extra-root material, and straw input significantly affected NECB. NGB and NGHGI were ranked ASI < CSI < CK, which was attributed primarily to significant changes in NECB, followed by N2O emissions. These results suggested that ASI can enhance maize yield and yield stability and reduce net GHG budgets on the Loess Plateau.
KW - Ammoniated straw incorporation
KW - Grain yield
KW - Greenhouse gas emissions
KW - Net ecosystem carbon budget
KW - Net greenhouse gas budget
UR - http://www.scopus.com/inward/record.url?scp=85151249260&partnerID=8YFLogxK
U2 - 10.1016/j.agee.2023.108503
DO - 10.1016/j.agee.2023.108503
M3 - Article
AN - SCOPUS:85151249260
SN - 0167-8809
VL - 352
JO - Agriculture, Ecosystems and Environment
JF - Agriculture, Ecosystems and Environment
M1 - 108503
ER -