Coupling Rice with Fish for Sustainable Yields and Soil Fertility in China

Guo, Liang; Hu, Liangliang; Zhao, Lufeng; Shi, Xiaoyu; Ji, Zijun; Ding, Lu; Ren, Weizheng; Zhang, Jian; Tang, Jianjun; Chen, Xin

doi:10.1016/j.rsci.2020.04.001

Cited by 18 publications

(6 citation statements)

References 21 publications

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“…Our results ( Table 1 ) reveal that the rice–fish co-culture system significantly increased SOC stock and TN similarly to other studies [ 41 , 42 , 43 , 44 ], which found that the rice–fish co-culture system can potentially increase the content of organic carbon and nitrogen in the soil through its mineralization of organic matter. This is due to the uneaten and excess feed as well as excreta produced during fish growth increasing SOC content and TN, which is consistent with the findings in the rice–crayfish–turtle co-culture by Li et al [ 45 ] and rice–crayfish farming system by Si et al [ 46 ].…”

Section: Discussionsupporting

confidence: 89%

Soil Microbial Diversity and Community Composition in Rice–Fish Co-Culture and Rice Monoculture Farming System

Arunrat

Sansupa

Kongsurakan

et al. 2022

Biology

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Soil microorganisms play an important role in determining nutrient cycling. The integration of fish into rice fields can influence the diversity and structural composition of soil microbial communities. However, regarding the rice–fish co-culture (RF) farming system in Thailand, the study of the diversity and composition of soil microbes is still limited. Here, we aim to compare the microbial diversity, community composition, and functional structure of the bacterial communities between RF and rice monoculture (MC) farming systems and identify the environmental factors shaping bacterial community composition. Bacterial taxonomy was observed using 16s rRNA gene amplicon sequencing, and the functional structures of the bacterial communities were predicted based on their taxonomy and sequences. The results showed that soil organic carbon, total nitrogen (TN), organic matter, available phosphorous, and clay content were significantly higher in RF than in MC. The most dominant taxa across both paddy rice fields belonged to Actinobacteria, Chloroflexi, Proteobacteria, Acidobacteria, and Planctomycetes. The taxa Nitrosporae, Rokubacteria, GAL15, and Elusimicrobia were significantly different between both rice fields. At the genus level, Bacillus, Anaeromyxobacter, and HSB OF53-F07 were the predominant genera in both rice fields. The most abundant genus in MC was Anaeromyxobacter, whereas RF belonged to Bacillus. The community composition in MC was positively correlated with magnesium and sand content, while in RF was positively correlated with pH, TN, and clay content. Nitrogen fixation, aromatic compound degradation, and hydrocarbon degradation were more abundant in RF, while cellulolysis, nitrification, ureolysis, and phototrophy functional groups were more abundant in MC. The enzymes involved in paddy soil ecosystems included phosphatase, β-glucosidase, cellulase, and urease. These results provide novel insights into integrated fish in the paddy field as an efficient agricultural development strategy for enhancing soil microorganisms that increase soil fertility.

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Section: Discussionsupporting

confidence: 89%

Soil Microbial Diversity and Community Composition in Rice–Fish Co-Culture and Rice Monoculture Farming System

Arunrat

Sansupa

Kongsurakan

et al. 2022

Biology

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“…Also, the cocultures both have lower embedded emissions largely because of their lower nitrogen fertilizer and pesticide input. 6,56 Between cocultures, the GHG intensity of rice crayfish is much higher than that of rice−fish (13,744 ± 1320 vs 9957 ± 1432 kg of CO 2 e ha −1 ; mean ± s.d., Figure 3a).…”

Section: ■ Resultsmentioning

confidence: 99%

“…Overall, we find that rice–fish and rice–crayfish have moderately lower GHG intensities (−12.1 and −18.2%, respectively) than monocultures on a per ha basis due in large part to their on-site CH 4 and N 2 O emission performances (Figure a). Also, the cocultures both have lower embedded emissions largely because of their lower nitrogen fertilizer and pesticide input. , Between cocultures, the GHG intensity of rice crayfish is much higher than that of rice–fish (13,744 ± 1320 vs 9957 ± 1432 kg of CO 2 e ha –1 ; mean ± s.d., Figure a).…”

Section: Resultsmentioning

confidence: 99%

Sustainable Blue Foods from Rice–Animal Coculture Systems

Wang,

Feng,

et al. 2024

Environ. Sci. Technol.

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Global interest grows in blue foods as part of sustainable diets, but little is known about the potential and environmental performance of blue foods from rice−animal coculture systems. Here, we compiled a large experimental database and conducted a comprehensive life cycle assessment to estimate the impacts of scaling up rice−fish and rice−crayfish systems in China. We find that a large amount of protein can be produced from the coculture systems, equivalent to ∼20% of freshwater aquaculture and ∼70% of marine wild capture projected in 2030. Because of the ecological benefits created by the symbiotic relationships, cocultured fish and crayfish are estimated to be carbon-negative (−9.8 and −4.7 kg of CO 2 e per 100 g of protein, respectively). When promoted at scale to displace red meat, they can save up to ∼98 million tons of greenhouse gases and up to ∼13 million hectares of farmland, equivalent to ∼44% of China's total rice acreage. These results suggest that rice−animal coculture systems can be an important source of blue foods and contribute to a sustainable dietary shift, while reducing the environmental footprints of rice production. To harvest these benefits, robust policy supports are required to guide the sustainable development of coculture systems and promote healthy and sustainable dietary change.

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“…Soil organic matter and available nitrogen, phosphorus and potassium content are important indicators for evaluating soil quality. Previous studies have shown that rice–fish integrated farming could improve the content of soil organic matter and available nutrients, especially the content of soil total nitrogen and alkali-hydrolyzable nitrogen 14 , 15 . In this study, the AN, AP and OM contents of RT9 treatment were 25.40%, 51.11% and 23.33% higher than CK, respectively.…”

Section: Discussionmentioning

confidence: 99%

Soil bacterial community composition in rice-turtle coculture systems with different planting years

Wang,

Ma,

et al. 2023

Sci Rep

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The rice-turtle coculture system is the most special rice-fish integrated farming system. In this study, we selected four paddy fields, including a rice monoculture paddy and three rice-turtle paddies with different planting years, to investigate the soil bacterial community composition with Illumina MiSeq sequencing technology. The results indicated that the contents of soil available nitrogen (AN), soil available phosphorus (AP) and soil organic matter (OM) in 9th year of rice-turtle paddy (RT9) were increased by 5.40%, 51.11% and 23.33% compared with rice monoculture paddy (CK), respectively. Significant differences of Acidobacteria, Desulfobacteria, Crenarchaeota were observed among the different rice farming systems. The relative abundance of Methylomonadaceae, Methylococcaceae and Methylophilaceae in RT9 was significantly higher than that in other treatments. RT9 had significantly lower relative abundance of Acidobacteria, but significantly higher relative abundance of Proteobacteria than other treatments. Redundancy analysis showed that soil AN and AP contents were the major factors influencing the abundance of the dominant microbes, wherein Methylomonadaceae, Methylococcaceae and Methylophilaceae were positively correlated with OM. The findings revealed the rice-turtle coculture system in the 9th year had higher soil nutrients and soil bacterial diversity, but there was also a risk of increasing methane emissions.

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Coupling Rice with Fish for Sustainable Yields and Soil Fertility in China

Cited by 18 publications

References 21 publications

Soil Microbial Diversity and Community Composition in Rice–Fish Co-Culture and Rice Monoculture Farming System

Soil Microbial Diversity and Community Composition in Rice–Fish Co-Culture and Rice Monoculture Farming System

Sustainable Blue Foods from Rice–Animal Coculture Systems

Soil bacterial community composition in rice-turtle coculture systems with different planting years

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