Paddy-upland rotation with Chinese milk vetch incorporation reduced the global warming potential and greenhouse gas emissions intensity of double rice cropping system

Zhong, Chuan; Liu, Ying; Xu, Xintong; Yang, Biao; Aamer, Muhammad; Zhang, Peng; Guo-qin, Huang

doi:10.1016/j.envpol.2021.116696

Cited by 37 publications

(23 citation statements)

References 56 publications

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“…Paddy-upland multiple cropping rotation can accelerate the soil carbon cycle and the decomposition rate of soil organic matter in the farmland and, therefore, improve soil fertility (Zheng et al, 2016 ). A previous study has shown that under the condition of planting green manure in the winter fallow period, compared with the double rice cropping system, the paddy-upland multiple cropping rotation significantly increased the soil pH, SOC content, and nitrate nitrogen content and decreased the ammonium nitrogen content (Zhong et al, 2021 ). Although soil ammonium nitrogen and nitrate nitrogen are the two main forms of nitrogen that can be absorbed by crops, different crops have different preferences for ammonium nitrogen and nitrate nitrogen (Alpha et al, 2009 ; Wang et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Soil Bacterial Community in the Multiple Cropping System Increased Grain Yield Within 40 Cultivation Years

Chen

Zheng

et al. 2021

Front. Plant Sci.

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The shortage of land resources restricts the sustainable development of agricultural production. Multiple cropping has been widely used in Southern China, but whether the continuous planting will cause a decline in soil quality and crop yield is unclear. To test whether multiple cropping could increase grain yield, we investigated the farmlands with different cultivation years (10–20 years, 20–40 years, and >40 years). Results showed that tobacco-rice multiple cropping rotation significantly increased soil pH, nitrogen nutrient content, and grain yield, and it increased the richness of the bacterial community. The farmland with 20–40 years of cultivation has the highest soil organic carbon (SOC), ammonium nitrogen, and grain yield, but there is no significant difference in the diversity and structure of the bacterial community in farmlands with different cultivation years. The molecular ecological network indicated that the stability of the bacterial community decreased across the cultivation years, which may result in a decline of farmland yields in multiple cropping system> 40 years. The Acidobacteria members as the keystone taxa (Zi ≥ 2.5 or Pi ≥ 0.62) appeared in the tobacco-rice multiple cropping rotation farmlands, and the highest abundance of Acidobacteria was found in the farmland with the highest SOC and ammonium nitrogen content, suggesting Acidobacteria Gp4, GP7, GP12, and GP17 are important taxa involved in the soil carbon and nitrogen cycle. Therefore, in this study, the multiple cropping systems for 20 years will not reduce the crop production potential, but they cannot last for more than 40 years. This study provides insights for ensuring soil quality and enhancing sustainable agricultural production capacity.

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Section: Discussionmentioning

confidence: 99%

Soil Bacterial Community in the Multiple Cropping System Increased Grain Yield Within 40 Cultivation Years

Chen

Zheng

et al. 2021

Front. Plant Sci.

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“…Local acidification of the soil may increase the ratio of fungi/bacteria, which in turn increases N 2 O release [84]. Zhong et al [77] verified this hypothesis and showed that Chinese milk vetch and rice rotation increased the cumulative emission of N 2 O (17-870%), mainly due to the reduction in soil pH and nosZ gene abundance, and increase in nirK and nirS gene abundance and NO 3 --N concentration.…”

Section: N 2 O Emissionsmentioning

confidence: 94%

“…The combined application of ryegrass with a high C/N ratio and chemical fertilizer caused a significantly higher CH 4 flux than the combined application of Chinese milk vetch with a low C/N ratio and chemical fertilizer [76]. However, Zhong et al [77] found through two-year field experiments that Chinese milk vetch and rice rotation significantly reduced the annual cumulative emissions of CH 4 (33-63%). The main reason was that milk vetch reduced the soil C/N ratio, thereby reducing the abundance of methanogens and increasing AOA abundance and soil permeability.…”

Section: Ch 4 Emissionsmentioning

confidence: 99%

Ecological and Environmental Benefits of Planting Green Manure in Paddy Fields

2022

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Soil fertility management is one of the most important factors affecting crop production. The use of organic manures, including green manure, is an important strategy to maintain and/or improve soil fertility for sustainable crop production. Green manure generally refers to crops that can provide fertilizer sources for agricultural cash crops and improve soil productivity. The application of green manure is a traditional and valuable practice for agroecosystem management, particularly in paddy systems where green manure is rotated with rice. This paper systematically reviews the effects of green manure on soil microenvironments and greenhouse gas emissions, and the role of green manure in the phytoremediation of paddy fields. The paper concludes that green manure can not only affect soil nutrients and the microbial community, but also reduce greenhouse gas emissions and enhance soil remediation to some extent. Moreover, this review provides theoretical guidance on the selection of green manure germplasm and tillage methods for paddy fields of different climates and textures. However, this review only provides a macro-overview of the effects of green manure on soil nutrients, greenhouse gas emissions, and soil remediation in rice paddies based on a large number of previous studies, and does not provide a comprehensive quantitative assessment due to differences in green manure varieties and soil texture. The prospects for quantitative analysis of the ecological and economic effects of the sustainable development of green manure cultivation are discussed.

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“…Therefore, CH4 emissions from RW paddy soil (He et al, 2022;Zhang et al, 2017) were often observed to be much lower than those from DR soil (Wang et al, 2018;Zhong et al, 2021).…”

Section: Effect On Mppmentioning

confidence: 99%

Differences in methanogenic pathways and methanogenic communities in paddy soils under three typical cropping modes

Shen

Huang

et al. 2022

Preprint

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Microbial methane (CH4) production and emission are various in different paddy fields. However, little is known about values of anaerobically produced δ13CH4, methanogenic pathways, and their dominant communities in different paddy soils. Through anaerobic incubation experiments and the stable carbon isotope with fluoromethane inhibitor method, CH4 production potential (MPP), the relative contribution of acetoclastic methanogenesis (fac), and the abundance and community composition of methanogens in paddy soils were measured under three typical cropping modes (Rice-Wheat, RW; Rice-Fallow, RF; Double-Rice, DR) in China. The results showed that MPP was 13.4 μg CH4 g–1 d–1 in DR soil, 23% and 46% higher than that in RW and RF soils, respectively. Moreover, RF soil had the highest produced δ13CH4 value (–43.9‰) and the lowest produced δ13CO2 value (–26.3‰). Based on the isotope fractionations associated with H2/CO2-dependent methanogenesis (1.049–1.062), fac values in RF soil (80–98%) were much higher than that in RW (39–60%) and DR (52–75%) soils. Compared to RF soil, mcrA gene abundance in RW and DR soils increased by 29% and 40%, respectively. Furthermore, the dominant methanogens in RF soil were Methanosarcina (acetoclastic methanogens) while Methanosarcina and Methanobacterium (hydrogenotrophic methanogens) were in RW and DR soils. Redundancy analysis revealed that soil pH and soil texture affected the community structure of methanogens. These findings suggest that differences in paddy MPP and methanogenic pathways under the three typical cropping modes might be caused by the changes in methanogenic abundance and community composition driven by soil pH.

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Paddy-upland rotation with Chinese milk vetch incorporation reduced the global warming potential and greenhouse gas emissions intensity of double rice cropping system

Cited by 37 publications

References 56 publications

Soil Bacterial Community in the Multiple Cropping System Increased Grain Yield Within 40 Cultivation Years

Soil Bacterial Community in the Multiple Cropping System Increased Grain Yield Within 40 Cultivation Years

Ecological and Environmental Benefits of Planting Green Manure in Paddy Fields

Differences in methanogenic pathways and methanogenic communities in paddy soils under three typical cropping modes

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