The effects of co-utilizing green manure and rice straw on soil aggregates and soil carbon stability in a paddy soil in southern China

ZHANG, Zi-han; Nie, J.; Liang, Hai; Wei, Cuilan; Wang, Yun; Liao, Yulin; Lu, Yanhong; Zhou, Guopeng; Gao, Shuang; Cao, Weidong

doi:10.1016/j.jia.2022.09.025

Cited by 18 publications

(6 citation statements)

References 54 publications

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“…Soil aggregates of different particle sizes have different protective effects on organic carbon. Large aggregates contain more unstable organic matter, more available nutrients, and a higher fertilizer capacity, while the carbon combined with microaggregates has high biochemical stability, and they are the main components of the long-term storage of soil organic carbon [43]. Both SOC and soil aggregates interact with each other and are indispensable [44].…”

Section: Discussionmentioning

confidence: 99%

Biochar Addition with Water and Fertilization Reduction Increases Soil Aggregate Stability of 0–60 cm Soil Layer on Greenhouse Eggplant in Mollisols

Zhou

Chen

et al. 2023

Agronomy

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Biochar application affects the soil organic carbon (SOC) content and distribution, which is relevant to facility agriculture and soil aggregates. However, how the fertilization management of facility agriculture affects the SOC content and aggregate stability at different soil depths in Mollisols is unclear. Intended to provide a basis for developing a reasonable fertilizer amount when adding biochar, the facility vegetable eggplant in Northeast China was used to explore the effects of biochar addition on the distribution and SOC content of whole soils and the organic carbon (OC) content of aggregates of each size in the profile (0–100 cm) of Mollisols. Three treatments were set up: WF (conventional application amounts of water and fertilizer), WFB (conventional application amounts of water and fertilizer and added biochar), and 80%W80%FB (20% water reduction and 20% fertilizer reduction and added biochar). The results demonstrated that the 80%W80%FB treatment significantly increased the SOC content by 56.1% and 34.0% in whole soils at a 0–20 cm soil depth compared to WF and WFB treatments, respectively. Simultaneously, compared with WF and WFB treatments, the significant increase in the OC content of 1–0.25 mm sized aggregates of 81.4–130.2% and 4.3–10.1% and the enhanced proportion of >2 mm sized aggregates of 0.22–16.15- and 0.33–0.83-fold both improved aggregate stability in the 0–20 cm soil layer under the 80%W80%FB treatment, which was proven to result in 32.6% and 30.6% increments in the weight diameter (MWD) value. Therefore, biochar addition with water and fertilizer reductions increases surface soil aggregate stability for greenhouse eggplants in Mollisols.

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Section: Discussionmentioning

confidence: 99%

Biochar Addition with Water and Fertilization Reduction Increases Soil Aggregate Stability of 0–60 cm Soil Layer on Greenhouse Eggplant in Mollisols

Zhou

Chen

et al. 2023

Agronomy

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“…Planting green manure has been shown to improve soil particle structure and texture, increase organic matter content, promote nutrient cycling, increase biodiversity, and reduce the input of single inorganic fertilizers while increasing yield (Ablimit et al, 2022). Traditional green manure cultivars are mainly based on leguminous crops while intercropping leguminous green manure can significantly increase the nutrient content and enzymatic activities of soil (Tejada et al, 2008), enhance the stability of soil aggregates and SOC (Zhang, Nie, et al, 2023), and reduce the number of potential plant pathogenic fungi (LeBlanc, 2022). Planting leguminous green manure can improve crop yield and economic benefits while maintaining a green and sustainable soil ecosystem development.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of farmland soil health and optimization of evaluation system under different green manure applications in a semi‐arid irrigation area

Wang,

Zhang,

Zhao

et al. 2024

Land Degrad Dev

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Healthy soil is essential for maintaining food security and enhancing ecosystem functions. Green manure application improves soil fertility and is an alternative to chemical fertilizers; however, research on optimizing soil health assessment systems and providing comprehensive and accurate information for local farmland green manure management models remains limited. In this study, we used maize and potato intercropped with green manure farmland in the main crop production area of a semi‐arid irrigation area in Northwest China as the research object, integrated the regional soil environment characteristics, and used principal component analysis and other methods to establish a minimum index data set including physicochemical, biological, and yield indices. A soil health assessment system applicable to the study region was constructed and optimized by drawing the scoring curve. The results showed that green manure treatment exerted a positive effect on the soil bulk density, nutrient content, extracellular enzyme activity, and the yield of maize and potato fields. This evaluation method showed that both green manure treatments could improve the soil health index of two major crop fields, with scores of 6.9 (3.7–8.6) and 6.2 (4.5–7.0) for maize and potato farmland, respectively, with a greater positive effect caused on maize. This evaluation system can not only reflect the soil conditions of farmland accurately given the application of green manure in the semi‐arid irrigation areas of northwest China but also provide reference for the promotion of organic fertilizers such as green manure and the resolution of regional soil health differences.

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“…Remarkably, even a relatively low level of straw return (6250 kg hm -2 ) can significantly boost the soil POC and other active carbon fractions. Research by Zhang et al [11] in China's southern double-cropping rice fields indicated that straw return impacts organic carbon components in different soil aggregate fractions. It enhances the soil-free light organic carbon (fLOC) and intra-aggregate particulate organic carbon (iPOC) content in various aggregate classes, promotes organic carbon transfer from fLOC to iPOC, and reduces the MOC content.…”

Section: Introductionmentioning

confidence: 99%

Effects of Straw Return Duration on Soil Carbon Fractions and Wheat Yield in Rice–Wheat Cropping System

Cui,

Cao,

Zhu

2024

Sustainability

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In China’s subtropical rice–wheat cropping system, the changes in the soil organic carbon (SOC) pool due to long-term straw return and its connection with crop yield remain unclear. This study aims to provide insights into establishing a sensible straw return system by evaluating the differences in the distribution and variation rates of SOC, light fraction organic carbon (LFOC), heavy fraction organic carbon (HFOC), particulate organic carbon (POC), and mineral-associated organic carbon (MOC) in the 0–20 cm soil layer under different durations of straw return. Additionally, the study analyzes the relationship between the changes in SOC and its fractions and wheat yield. The experiment was conducted in 2019 in a rice–wheat rotation field with ten years of straw return treatments: no straw return (NR) or 1, 2, 3, 4, 5, 6, 7, 8, 9 year(s) of straw return (SR1–9), and an additional treatment in 2020 (10 years of straw return, SR10). The results revealed that with an increase in the duration of straw return, the contents of SOC, LFOC, HFOC, and POC gradually increased, showing the highest increments of 45.88%, 187.22%, 41.55%, 97.89%, and 28.21%, respectively, compared to the NR treatment. However, after eight years of straw return, the compound annual increase in soil organic carbon and its components was lower than in years 1–8, indicating a trend of diminishing increments. The SOC content and its variation were significantly correlated with the content and variation of LFOC, HFOC, POC, and MOC, with the highest sensitivity observed for the variation in LFOC, indicating the strong influence of the duration of straw return. The SOC and its fraction contents showed significant positive correlations with wheat yield, with the highest contribution to wheat yield increase attributed to an increase in LFOC content. In summary, straw return enhances the 0–20 cm deep soil carbon pool, with LFOC being the most sensitive indicator, reflecting the influence of the duration of straw return on soil carbon pools.

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The effects of co-utilizing green manure and rice straw on soil aggregates and soil carbon stability in a paddy soil in southern China

Cited by 18 publications

References 54 publications

Biochar Addition with Water and Fertilization Reduction Increases Soil Aggregate Stability of 0–60 cm Soil Layer on Greenhouse Eggplant in Mollisols

Biochar Addition with Water and Fertilization Reduction Increases Soil Aggregate Stability of 0–60 cm Soil Layer on Greenhouse Eggplant in Mollisols

Evaluation of farmland soil health and optimization of evaluation system under different green manure applications in a semi‐arid irrigation area

Effects of Straw Return Duration on Soil Carbon Fractions and Wheat Yield in Rice–Wheat Cropping System

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