Nitrogen reduction with green manure roots return maintains spring wheat yield and alleviates soil N2O emission in saline-alkali agroecosystem

被引：0

作者：

Chang, Fangdi ^{[1
,2
]}

Zhang, Hongyuan ^{[1
]}

Zhao, Peiyi ^{[3
]}

Zhao, Na ^{[4
]}

Song, Jiashen ^{[1
]}

Yu, Ru ^{[1
]}

Wang, Jing ^{[1
]}

Wang, Xiquan ^{[5
]}

Han, Dongxun ^{[4
]}

Liu, Hanjiang ^{[4
]}

Zhou, Jie ^{[6
]}

Li, Yuyi ^{[1
]}

机构：

[1] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arable Land China, Beijing 100081, Peoples R China

[2] China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China

[3] Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot 010031, Peoples R China

[4] Bayannur Acad Agr & Anim Husb Sci, Linhe 015000, Peoples R China

[5] Inner Mongolia Agr Univ, Coll Agron, Hohhot 10010, Peoples R China

[6] Nanjing Agr Univ, Coll Agr, Nanjing 210095, Peoples R China

来源：

RESOURCES ENVIRONMENT AND SUSTAINABILITY | 2025年 / 20卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Spring wheat yield; N fertilizer; Green manure; Saline-alkali soil; Soil N2O; OXIDE EMISSIONS; ORGANIC AMENDMENTS; FERTILIZER; CARBON; CH4; DENITRIFICATION; METAANALYSIS; METHANE; RESIDUE; FLUXES;

D O I：

10.1016/j.resenv.2025.100202

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The growing global demand for grain drives a greater need for nitrogen (N) input. Yet, it contributes to nitrous oxide (N2O) emissions, aggravating global climate change. To tackle this dual challenge of fulfilling crop demands while maintaining or reducing N2O emissions, afield study was performed in wheat-green manure cropping system to assess the effects of varying fertilizer application (N100, N90 and N80: N fertilizer reduced by 0%, 10% and 20%) combined with green manure return strategy (GMR: green manure roots return, GMRS: green manure roots and shoots return), and wheat fallow after harvest (CK) on wheat yield and yield stability from 2020 to 2024, N2O emissions, as well as N2O emission intensity from 2022 to 2024. Results showed that, although N fertilizer combined with green manure return strategy increased spring wheat yield by 8%-22% by increasing soil mineral N contents, it decreased yield stability compared with CK. Soil N2O emissions were mainly negatively and positively regulated by pH and NO-3-N content in saline-alkali soil, respectively. N80 decreased cumulative soil N2O emission and N2O intensity by 20% and 10% compared with N100, respectively. Irrespective of the variations in N fertilizer levels, GMR decreased cumulative N2O emission and N2O intensity by 20%-34% and 22%-38% compared with GMRS, respectively. Overall, the findings highlighted N fertilizer reduced by 20% (160 kg N ha-1) with green manure roots returned in relative to normal rate (200 kg N ha-1) is a viable option to ensure spring wheat yield and alleviate soil N2O emission in saline-alkali agroecosystem.

引用

页数：12