Sustainable soil management for food security

Hou, Deyi

doi:10.1111/sum.12883

Cited by 15 publications

(8 citation statements)

References 69 publications

(72 reference statements)

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“…With regard to future research in soil health assessment of arable land, the selection of appropriate assessment indicators suitable for the specific study area is important. Bio‐indicators are attracting increasing interest (Hou, 2023). Further attention should be paid to the industrial production of biochar and the effects of its long‐term practical use.…”

Section: Resultsmentioning

confidence: 99%

“…The concept of soil health, as defined by (Doran et al., 1996), pertains to the capacity of soil to function as a living system within an ecosystem and land‐use boundaries, where healthy soils can sustain plant and animal productivity, maintain or improve water and air quality and promote plant and animal health. Globally, soils are affected by multiple soil health impairments, such as acidification and pollution (Hou, 2023), meaning that the importance of evaluating soil health for achieving sustainable food production and environmental goals is widely recognized.…”

Section: Introductionmentioning

confidence: 99%

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Soil health assessment of an acidic red soil agricultural area and its restoration with biochar soil conditioners

Li,

Jiang,

Lyu

2023

Soil Use and Management

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In light of growing concerns regarding food security and soil health, there is increasing emphasis on the assessment of soil health and efforts to improve or maintain the soil health of cultivated land. This case study Niutian Town in Jiangxi Province in southern China was selected as a typical red soil and a major grain‐producing area. This research involves an integrated evaluation model based on Entropy weight TOPSIS and emergy analysis to assess the soil health of cultivated land. An evaluation system was developed, comprising 31 indicators selected on the basis of resources and environments, with an emphasis on sensitive and promising microorganisms category indicators. Additionally, experiments were conducted to assess the ecological risk of soil pollution and develop novel soil conditioners. Our results indicate that Pb, Hg and Cd present a moderate ecological risk on 92.1% of the cultivated land. Furthermore, 56.8% of the cultivated land was ‘sub‐healthy’ or ‘unhealthy’. Biochar was found to be a soil conditioner with a good adsorption effect, with absorption rates reaching up to 99.9% and 88.3% for Pb and Cd, respectively. Additionally, g‐C3N4 was added to address pesticide contamination, which showed an adsorption rate of up to 75.2% for atrazine. This work develops a targeted remediation approach based on assessment results to address regional cropland soil health issues.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Soil health assessment of an acidic red soil agricultural area and its restoration with biochar soil conditioners

Li,

Jiang,

Lyu

2023

Soil Use and Management

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“…In recent years, environmental pressures have forced scientists and farmers to develop and adopt more sustainable agricultural practices (Hobbs et al, 2008). The recognition of soil's importance has accelerated in recent years due to the ongoing international effort on Agenda 2030, that is towards achieving the 17 sustainable development goals (SDGs) and that soil plays critical roles in many of these SDGs (Hou, 2023). Among the various countries, the US has produced the largest number of scientific papers relating to soil health, followed by India and China (see Figure 2).…”

Section: Indicators and Research Trendmentioning

confidence: 99%

Soil health and ecosystem services

Hou

2023

Soil Use and Management

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“…Soil contamination poses a significant threat to the achievement of the United Nations' Sustainable Development Goals (FAO and UNEP, 2021; Hou, 2023; Jin et al., 2021). Among the various contaminants that raise concerns for public health, the contamination of soil by heavy metals and metalloids, such as cadmium (Cd) and arsenic (As), presents a formidable environmental challenge (Hou, O'Connor, et al., 2020; Jia et al., 2021; Wang, Guo, et al., 2023).…”

Section: Introductionmentioning

confidence: 99%

Biochar amendment gradually immobilized soil As and Sb over 2 years

Hu,

Wang,

Mašek

et al. 2024

Soil Use and Management

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Biochar is a promising candidate for the sustainable remediation of soils, especially those contaminated with cationic heavy metals, because of its liming effect and tunable surface functionality. Despite its potential, prior studies have highlighted biochar's limitations in immobilizing soil oxyanions, such as arsenic (As) and antimony (Sb), particularly in the short term. This shotcoming is primarily attributed to an increase of soil pH following biochar amendment, and factors like competition with phosphate. In this study, biochar amendments were applied to three soils with varying levels of oxyanions including As and Sb, and cations including cadmium (Cd) and lead (Pb). These treatments generally resulted in short‐term failure of oxyanion immobilization. However, a noteworthy phenomenon unfolded over a 2‐year period, where biochars gradually transitioned from initial mobilization or poor immobilization to eventual successful immobilization of oxyanions (up to 87.0% for As and 100% for Sb). Temporal changes in Cd and Pb differed from As and Sb, exhibiting no improvement in immobilization rates over time. Potential mechanisms driving this process were investigated, suggesting a decline in soil pH, progressive oxidation of soil carbon fractions, and direct adsorption effects as contributing factors. This study sheds light on the temporal shift in biochar's immobilization performance, highlighting a gradual increase in the efficacy in oxyanion immobilization. The findings offer valuable insights into the dynamic nature of biochar's remediation capabilities.

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Sustainable soil management for food security

Cited by 15 publications

References 69 publications

Soil health assessment of an acidic red soil agricultural area and its restoration with biochar soil conditioners

Soil health assessment of an acidic red soil agricultural area and its restoration with biochar soil conditioners

Soil health and ecosystem services

Biochar amendment gradually immobilized soil As and Sb over 2 years

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