Straw incorporation plus biochar addition improved the soil quality index focused on enhancing crop yield and alleviating global warming potential

Li, Na; Wen, Shuyue; Wei, Shikun; Li, Hongyang; Feng, Yongzhong; Ren, Guangxin; Han, Xinhui; Wang, Xiaojiao; Ren, Chao

doi:10.1016/j.eti.2020.101316

Cited by 13 publications

(5 citation statements)

References 39 publications

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“…This result revealed that continuous vegetable cultivation increased the risk of soil quality degradation. This finding seemed contradictory to the reports of previous studies [39,62,66,67], which reported that biochar generally improved overall soil quality. However, lower SFI values were observed in two contrasting soils [68], related to the soil's weathered condition and lower levels of measured indicators.…”

Section: Lasting Effect Of Biochar On Vegetable Quality and Soil Fert...contrasting

confidence: 99%

Biochar Mitigated Yield-Scaled N2O and NO Emissions and Ensured Vegetable Quality and Soil Fertility: A 3-Year Greenhouse Field Observation

Zhang

et al. 2022

Agronomy

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Biochar amendments have been widely used in agricultural soil for lowering N2O and NO emissions while improving soil fertility and crop performance. However, a thorough understanding of the longevity of the favorable effects would be a prerequisite for large-scale biochar application in agriculture. We conducted a three-year greenhouse vegetable trial in Southeast China to systematically investigate the impacts of biochar mixed with nitrogen (N) on soil N2O and NO emissions, vegetable performance, and soil fertility at an interannual scale. The field experiment was established in November 2016 with biochar (0, 20 and 40 t ha−1; C0, C1, and C2, respectively), applied once without/with 240 kg N ha−1 urea (N0 or N1, respectively). Soil N2O and NO emissions were monitored during the spring vegetable cultivation period, and vegetable yield, quality, and soil properties were measured after harvests in 2018, 2019, and 2020. Results indicated that N application significantly increased N2O and NO emissions and vegetable yield throughout the trial period. Biochar combined with N generally reduced N2O and NO emissions and emission factors while increasing the vegetable yield, leading to lower yield-scaled N2O and NO emissions in 2018 and 2019. Biochar markedly enhanced soil pH and organic carbon and persisted, but generally had no significant effect on N use efficiency (NUE), vegetable quality, and soil fertility index (SFI) among treatments in over-fertilized vegetable fields. Based on our results, biochar application at 20 t ha−1 combined with N seemed to achieve the highest agronomic and environmental benefits for intensive vegetable production in Southeast China.

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Section: Lasting Effect Of Biochar On Vegetable Quality and Soil Fert...contrasting

confidence: 99%

Biochar Mitigated Yield-Scaled N2O and NO Emissions and Ensured Vegetable Quality and Soil Fertility: A 3-Year Greenhouse Field Observation

Zhang

et al. 2022

Agronomy

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“…This reduction in microbial entropy may be an important factor contributing to higher SOC and SOCSR in the organic N fertilizer treatments. Lower microbial entropy indicates higher SOC stability and a lower potential for organic matter mineralization, as microbial entropy reflects the microbial C demand for respiration (Cao et al, 2021; Deng et al, 2016; Li, Wen, et al, 2021). As discussed earlier, the organic fertilizer treatments did not result in higher MBC due to N limitation, which hampers the support for an adequate nitrifying population to transform soil NH 4 + into NO 3 − , leading to the higher soil NH 4 + to NO 3 − ratios in O1 (0.32) and O3 (0.45) than N1 (0.22) (data not presented) (Srivastava, Singh, Bhadouria, et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Linking microbial carbon‐degrading potential to organic carbon sequestration in fertilized soils: Insights from metagenomics

Ma,

Niu,

et al. 2023

Land Degrad Dev

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The capacity of soils to store organic carbon (SOC) is vital for agricultural productivity. Soil microorganisms exert a critical role in carbon (C) flow and potentially influence C balance through the decomposition of plant and microbial dead biomass. However, the connection between the microbial degradation potential of plant‐derived and microbial‐derived C and soil organic carbon sequestration (SOCSR) under organic and inorganic nitrogen (N) fertilization treatments remains largely unexplored using metagenomics. In this study, metagenomics was used to investigate the effects of 4 years inorganic (N1: 250 kg N ha−1 yr−1 and N3: 450 kg N ha−1 yr−1) and organic N (O1: N1 + 11,250 kg ha−1 yr−1 sheep manure and O3: N1 + 18,750 kg ha−1 yr−1 sheep manure) fertilizer application on plant biomass decomposition genes, microbial biomass decomposition genes, and microbial properties related to different sources of C decomposition (species composition and diversity). Furthermore, the study explored the relationship between organic matter decomposition genes, microorganisms, and SOCSR. The results revealed that compared with N1 treatment, the increased application of inorganic N fertilizer (N3) significantly enhanced the abundance of genes related to plant and microbial biomass decomposition and microbial diversity involved in SOC decomposition, resulting in reduced SOC content. Conversely, the increased application of organic N fertilizer (O1 and O3) had a minor effect on the abundance of genes related to different sources of C decomposition and C decomposing microbial diversity, but reduced microbial entropy (the ratio of microbial biomass carbon to SOC) and increased SOC content. The random forest model highlighted that plant biomass decomposition genes and bacterial community composition were important factors affecting SOCSR. The Mantel test also indicated that the genes involved in the decomposition of lignin, cellulose, and hemicellulose were closely related to SOCSR. These findings highlighted that increased inorganic N fertilizers greatly enhanced the microbial capacity for SOC decomposition, resulting in reduced SOC accumulation. While the increased application of organic N fertilizer increased SOC stability and reduced the mineralization potential of SOC, contributing to SOCSR. Overall, these findings provide a greater understanding of the relationship between soil C turnover and microbial C‐degrading potential under short‐term fertilization. And in a long time, they may have important implications for global strategies aimed at increasing SOCSR to restore fertility and facilitate sustainable agricultural development.

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“…In another study, corn stalk (6 Mg ha −1 ) when applied in combination with biochar (10 Mg ha −1 ) reduced N 2 O emissions by −33% compared to corn stalk alone (12 Mg ha −1 ) (Hou et al., 2020). Wheat straw (5 Mg ha −1 ) plus N‐fertilizer (225 kg N ha −1 ) when applied in combination with biochar (8 Mg ha −1 ) reduced N 2 O emissions by −33% compared to only wheat straw plus N‐fertilizer (Li et al., 2021). Moreover, application of biochar in combination with compost significantly reduced N 2 O emissions by up to −87% (Figure 7c).…”

Section: Advances In the Effect Of Biochar Application To Agricultura...mentioning

confidence: 99%

Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

et al. 2023

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Biochar is one of the few nature‐based technologies with potential to help achieve net‐zero emissions agriculture. Such an outcome would involve the mitigation of greenhouse gas (GHG) emission from agroecosystems and optimization of soil organic carbon sequestration. Interest in biochar application is heightened by its several co‐benefits. Several reviews summarized past investigations on biochar, but these reviews mostly included laboratory, greenhouse, and mesocosm experiments. A synthesis of field studies is lacking, especially from a climate change mitigation standpoint. Our objectives are to (1) synthesize advances in field‐based studies that have examined the GHG mitigation capacity of soil application of biochar and (2) identify limitations of the technology and research priorities. Field studies, published before 2022, were reviewed. Biochar has variable effects on GHG emissions, ranging from decrease, increase, to no change. Across studies, biochar reduced emissions of nitrous oxide (N2O) by 18% and methane (CH4) by 3% but increased carbon dioxide (CO2) by 1.9%. When biochar was combined with N‐fertilizer, it reduced CO2, CH4, and N2O emissions in 61%, 64%, and 84% of the observations, and biochar plus other amendments reduced emissions in 78%, 92%, and 85% of the observations, respectively. Biochar has shown potential to reduce GHG emissions from soils, but long‐term studies are needed to address discrepancies in emissions and identify best practices (rate, depth, and frequency) of biochar application to agricultural soils.

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Straw incorporation plus biochar addition improved the soil quality index focused on enhancing crop yield and alleviating global warming potential

Cited by 13 publications

References 39 publications

Biochar Mitigated Yield-Scaled N2O and NO Emissions and Ensured Vegetable Quality and Soil Fertility: A 3-Year Greenhouse Field Observation

Biochar Mitigated Yield-Scaled N2O and NO Emissions and Ensured Vegetable Quality and Soil Fertility: A 3-Year Greenhouse Field Observation

Linking microbial carbon‐degrading potential to organic carbon sequestration in fertilized soils: Insights from metagenomics

Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

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