@article{ZHU2026, 
author = {Qi ZHU and ZhenPeng JIA and SHAH Tahir and ChenSheng XU and ZhiQi LI and HuiShuai LÜ and PengChao ZHU and XiaoMin WEI and DongLin HUANG and YanNi SUN and WeiDong CAO and YaJun GAO and ZhaoHui WANG and DaBin ZHANG},
title = {Green Manure Crops Combined with Enhanced-Efficiency Products Reduced Greenhouse Gas Emissions and Carbon Footprints in Dryland Wheat Fields},
year = {2026},
journal = {Scientia Agricultura Sinica},
volume = {59},
number = {7},
pages = {1507-1522},
keywords = {black beans (Phaseolus vulgaris L.), rapeseed (Brassica napus L.), winter wheat, composite biological bacteria, sepiolite, absorbent polymer, greenhouse gas, carbon footprints},
url = {https://www.sciopen.com/article/10.3864/j.issn.0578-1752.2026.07.010},
doi = {10.3864/j.issn.0578-1752.2026.07.010},
abstract = {ObjectiveA field experiment was conducted to investigate the effects of green manure (GM) crops combined with enhanced-efficiency products on greenhouse gas emissions (GHGs) and carbon (C) footprints in the dryland summer GM-winter wheat rotation system on the Loess Plateau, so as to provide the theoretical basis and technical parameters for fully tapping the emission reduction and C fixation potential of GM crops, and evaluating its environmental benefits in this cropping system.MethodThe GHGs patterns and net balance of soil C pool in summer GM-winter wheat rotation system of black beans (Phaseolus vulgaris L.) and rapeseed (Brassica napus L.) combined with different enhanced-efficiency products were measured from 2023 to 2024. There were 9 treatments, including: fallow (control), black beans sown alone, black beans + composite biological bacteria (Zaoyijia No.1), black beans + bacterium (Bacillus beresii B22), black beans + sepiolite, rapeseed sown alone, rapeseed + absorbent polymer (Shouke), rapeseed + actinomycetes (Streptomycete rochei D74), and rapeseed + sepiolite, each with 3 replications. C footprints were quantified and evaluated comprehensively, and the suitable GM + product combinations for C sequestration and GHGs emission reduction in drylands were screened.Result(1) Compared with black beans sown alone, black beans + bacterium significantly reduced N2O and CO2 emissions, and global warming potential (GWP), with an average decrease of 29.3%, 17.5%, and 17.8%, respectively, reduced 21.6% GHGs intensity (P>0.05), and increased 7.8% wheat yield (P>0.05). (2) Black beans + bacterium showed the highest dry biomass(4 230 kg·hm-2) and C input(1 750 kg·hm-2) and decreased 43.6% (P<0.05) C footprints compared to fallow. (3) Compared with rapeseed sown alone, rapeseed + sepiolite significantly reduced N2O and CO2 emissions, and GWP, with an average decrease of 52.0%, 16.9%, and 17.6%, respectively. (4) Rapeseed + sepiolite showed the highest dry GM biomass(2 723 kg·hm-2) and reduced 27.0% (P<0.05) C footprints compared with fallow.ConclusionIntroducing the optimized mixture of black beans + bacterium and rapeseed + sepiolite into the summer GM-winter wheat system in the Loess Plateau effectively reduced the GHGs and GWP after incorporating the GM crops, boosted C input, and diminished the C footprints of the crop growth period. This study established a green and clean production model that promoted grain quality, fertilizer use efficiency, C sequestration, and emission reduction, and accelerated the high-quality development of "ecological priority, green and low-carbon" in drylands.}
}