Soil and water conservation measures reduce erosion but result in carbon and nitrogen accumulation of red soil in Southern China

Zhang, Yan; Qin, Xin; Qiu, Quan; Yu, Ronggang; Yao, Yufei; Li, Haiqiang; Shao, Mingan; Wei, Xiaorong

doi:10.1016/j.agee.2023.108346

Cited by 14 publications

(3 citation statements)

References 47 publications

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“…Figures 5b and 6 indicate that the lack of a significant response of Rh to N fertilizer can be ascribed to the corrective effects of the enhanced MBC on the Rh. The enhanced MBC with N treatment was consistent with earlier investigations [64] because MBC and MBN restrictions have been relieved due to an improved aboveground C substrate supply. According to the N mining theory [65], when N is sufficient to suit the needs of soil microorganisms, labile C should be preferentially degraded over recalcitrant C, which reduces soil labile C, which suppresses microbial activity.…”

Section: Controlling Factors and Pathways For The Ra And Rhsupporting

confidence: 90%

Nitrogen Addition Decreased Respiration and Heterotrophic Respiration but Increased Autotrophic Respiration in a Cabbage (Brassica pekinensis Rupr) Experiment in the Northeast Plains

Jiang,

Yan,

Liu

et al. 2024

Agriculture

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Farmland soil respiration (Rs) significantly impacts the global carbon (C) cycle. Although nitrogen (N) can promote crop growth and increase yields, its relationship with Rs and its constituents, including autotrophic respiration (Ra) and heterotrophic respiration (Rh), remains unclear. Therefore, a field study was carried out in a cabbage (Brassica pekinensis Rupr) system to probe the impact of N addition on Rs, Ra, and Rh. Five levels of N addition, including 0 kg N hm−2·yr−1 (N0), 50 kg N hm−2·yr−1 (N50), 100 kg N hm−2·yr−1 (N100), 150 kg N hm−2·yr−1 (N150), and 200 kg N hm−2·yr−1 (N200), started in March 2022. The Rs (Ra and Rh) and soil samples were measured and collected twice a month. The findings revealed the following: (1) N fertilizer enhanced Ra while reducing Rs and Rh; (2) soil temperature (ST), belowground net primary productivity (BNPP), soil inorganic N (SIN), and soil total C/total N (C/N) were the significant elements influencing Ra, and microbial biomass carbon (MBC), SIN, and microbial diversity (MD) were the primary factors influencing Rh; (3) partial least squares-path models (PLS-PM) showed that ST and SIN directly impacted Rh, while ST and BNPP tangentially influenced Ra; (4) 150 kg N hm−2·yr−1 was the ideal N addition rate for the cabbage in the region. In summary, the reactions of Ra and Rh to N fertilizer in the Northeast Plains are distinct. To comprehend the underlying processes of Rs, Ra, and Rh, further long-term trials involving various amounts of N addition are required, particularly concerning worsening N deposition.

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Section: Controlling Factors and Pathways For The Ra And Rhsupporting

confidence: 90%

Nitrogen Addition Decreased Respiration and Heterotrophic Respiration but Increased Autotrophic Respiration in a Cabbage (Brassica pekinensis Rupr) Experiment in the Northeast Plains

Jiang,

Yan,

Liu

et al. 2024

Agriculture

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“…Zhang Y et al [33] found that soil and water conservation measures increased the soil organic carbon, total nitrogen, microbial biomass carbon, and microbial biomass nitrogen by 8-57%, 1-14%, 25-68%, and 17-35%, respectively, with greater increases in the contour ridge cultivation tillage and straw mulching treatments and a smaller increase in the downslope ridge cultivation treatment. Furthermore, the mineral N content (NO3 and NH4 + ) in the soil tends to be elevated due to the mineralization of organic N over time, thereby increasing the availability of soil nitrogen.…”

Section: Soil Fertility Improvementmentioning

confidence: 99%

Significance of Mulching on Soil Conservation

Bhargavi,

Anusha

2023

IJPSS

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The rapidly expanding global population, coupled with limited accessible freshwater resources and recurrent climatic fluctuations, have placed significant stress on humanity. This pressure has necessitated decisive actions to curb water wastage. Concurrently, water conservation initiatives have gained momentum, particularly within the world's largest water-intensive sector, agriculture. One notable advancement in enhancing water use efficiency in agronomy is the widespread adoption of drip irrigation. This method involves the precise delivery of water directly to the root zone of crops, minimizing water losses up to 70% attributed to evaporation and distribution inefficiencies. Furthermore, the synergistic application of mulching in conjunction with drip irrigation in arid crop cultivation has emerged as a robust strategy for alleviating water stress in agriculture. Mulch, comprising natural, synthetic, or blended materials, serves as a protective layer between the soil and the atmosphere. Its multifaceted benefits include efficient soil moisture retention, regulation of soil temperature, prevention of nutrient leaching, improved fertilizer utilization, erosion resistance, weed suppression, and aesthetic enhancement of landscapes. This review paper comprehensively explores various facets of mulching, underscoring its role as a dynamic tool for water and soil management in agriculture while preserving the intrinsic value of cultivated crops.

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“…Due to its soil characteristics and natural factors like rainfall and terrain, the red soil region of south China has emerged as the second-largest area affected by soil erosion behind the Loess Plateau [1,2]. Changting County, Fujian Province, is a representative soil erosion area in southern red soil.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Shifts in Soil Fungal Functional Group Characteristics across Distinct Vegetation Types during Ecological Restoration in Degraded Red Soil Regions

Hou,

Yu,

Han

et al. 2024

Forests

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The red soil region in southern China has become the second-largest soil erosion area after the Loess Plateau. The evolutionary trajectory of soil fungi during vegetation restoration in acidic red soil regions remains a subject of inquiry. The investigation focused on the restoration process of an ecosystem facing intense degradation in the southern regions of China by studying four distinctive vegetation types: barren land (BL), pure Pinus massoniana forest (CF), mixed coniferous (CBF), and broad-leaved forest (BF). The outcomes revealed considerable enhancements in soil properties’ attributes, evident through a gradual reduction in the bulk density of soil (SBD) and a corresponding increment in soil moisture content (MC), total nitrogen (TN), total carbon (TC), total potassium (TK), soil organic matter (SOM), and available potassium (AK) as vegetation restoration advanced. An intriguing trend emerged where the relative abundance of Ascomycota fungi displayed a declining trajectory, whereas Basidiomycota fungi exhibited an ascending trend with the progression of vegetation restoration. Specifically, broad-leaved forests exhibited a significantly greater relative abundance of Penicillium fungi compared to other stages of vegetation restoration. The diversity of soil fungal communities increased in tandem with vegetation restoration. A redundancy analysis illuminated a strong and positive relationship between the abundance of major soil fungi and soil pH, TN, and TC (key influencers of acidic red soil fungal populations). This study provided additional evidence of an elevation in ectomycorrhizal and saprophytic trophic fungi, signifying a transition that enhances the vegetation’s ability to capture water and nutrients. This, in turn, contributes to the overall enrichment and diversity of vegetation communities during the progression of restoration.

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Soil and water conservation measures reduce erosion but result in carbon and nitrogen accumulation of red soil in Southern China

Cited by 14 publications

References 47 publications

Nitrogen Addition Decreased Respiration and Heterotrophic Respiration but Increased Autotrophic Respiration in a Cabbage (Brassica pekinensis Rupr) Experiment in the Northeast Plains

Nitrogen Addition Decreased Respiration and Heterotrophic Respiration but Increased Autotrophic Respiration in a Cabbage (Brassica pekinensis Rupr) Experiment in the Northeast Plains

Significance of Mulching on Soil Conservation

Dynamic Shifts in Soil Fungal Functional Group Characteristics across Distinct Vegetation Types during Ecological Restoration in Degraded Red Soil Regions

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