Abstract:The northern Songnen Plain in China is one of the most important areas for grain production in China, which has been increasingly affected by wind erosion in recent years. This study analyzed the dynamic spatiotemporal distribution of wind erosion in the northern Songnen Plain from 2010 to 2018 using the Revised Wind Erosion Equation model. The ecological service function of the study area was evaluated by constructing a spatial visualization map of windbreak and sand-fixation service flow. Wind erosion worsen… Show more
“…Previous studies showed that the soil nutrient in wind erosion farmland significantly decreased 13 , and the lost SOC would accumulate in sand accumulation areas 21 . However, this study suggested that SOC did not increase with sand deposition.…”
Section: Discussionmentioning
confidence: 97%
“…The annual potential evapotranspiration (PET) exceeds 1000 mm, and the ratio of yearly precipitation to PET is as low as 0.2–0.5 25 . This area is a typical wind erosion area 13 , with a soil layer thickness of about 30–45 cm in farmland, mainly planted with corn. Figure 1 Location map of the study site in the Songnen Plain, China ( e ).…”
Section: Methodsmentioning
confidence: 99%
“…Its western region is semi-arid, with an annual precipitation of 350–450 mm, making it susceptible to wind erosion 6 . In recent decades, wind erosion has rapidly expanded from Horqin Sandy Land and Hulunbeier Sandy Land to the Black Soil Belt 13 . Desertification caused by sand deposition has become the leading cause of soil degradation in farmland.…”
The effects of wind erosion, one of the crucial causes of soil desertification in the world, on the terrestrial ecosystem are well known. However, ecosystem responses regarding soil microbial carbon metabolism to sand deposition caused by wind erosion, a crucial driver of biogeochemical cycles, remain largely unclear. In this study, we collected soil samples from typical aeolian deposition farmland in the Songnen Plain of China to evaluate the effects of sand deposition on soil properties, microbial communities, and carbon metabolism function. We also determined the reads number of carbon metabolism-related genes by high-throughput sequencing technologies and evaluated the association between sand deposition and them. The results showed that long-term sand deposition resulted in soil infertile, roughness, and dryness. The impacts of sand deposition on topsoil were more severe than on deep soil. The diversity of soil microbial communities was significantly reduced due to sand deposition. The relative abundances of Nitrobacteraceae, Burkholderiaceae, and Rhodanobacteraceae belonging to α-Proteobacteria significantly decreased, while the relative abundances of Streptomycetaceae and Geodermatophilaceae belonging to Actinobacteria increased. The results of the metagenomic analysis showed that the gene abundances of carbohydrate metabolism and carbohydrate-activity enzyme (GH and CBM) significantly decreased with the increase of sand deposition amount. The changes in soil microbial community structure and carbon metabolism decreased soil carbon emissions and carbon cycling in aeolian deposition farmland, which may be the essential reasons for land degradation in aeolian deposition farmland.
“…Previous studies showed that the soil nutrient in wind erosion farmland significantly decreased 13 , and the lost SOC would accumulate in sand accumulation areas 21 . However, this study suggested that SOC did not increase with sand deposition.…”
Section: Discussionmentioning
confidence: 97%
“…The annual potential evapotranspiration (PET) exceeds 1000 mm, and the ratio of yearly precipitation to PET is as low as 0.2–0.5 25 . This area is a typical wind erosion area 13 , with a soil layer thickness of about 30–45 cm in farmland, mainly planted with corn. Figure 1 Location map of the study site in the Songnen Plain, China ( e ).…”
Section: Methodsmentioning
confidence: 99%
“…Its western region is semi-arid, with an annual precipitation of 350–450 mm, making it susceptible to wind erosion 6 . In recent decades, wind erosion has rapidly expanded from Horqin Sandy Land and Hulunbeier Sandy Land to the Black Soil Belt 13 . Desertification caused by sand deposition has become the leading cause of soil degradation in farmland.…”
The effects of wind erosion, one of the crucial causes of soil desertification in the world, on the terrestrial ecosystem are well known. However, ecosystem responses regarding soil microbial carbon metabolism to sand deposition caused by wind erosion, a crucial driver of biogeochemical cycles, remain largely unclear. In this study, we collected soil samples from typical aeolian deposition farmland in the Songnen Plain of China to evaluate the effects of sand deposition on soil properties, microbial communities, and carbon metabolism function. We also determined the reads number of carbon metabolism-related genes by high-throughput sequencing technologies and evaluated the association between sand deposition and them. The results showed that long-term sand deposition resulted in soil infertile, roughness, and dryness. The impacts of sand deposition on topsoil were more severe than on deep soil. The diversity of soil microbial communities was significantly reduced due to sand deposition. The relative abundances of Nitrobacteraceae, Burkholderiaceae, and Rhodanobacteraceae belonging to α-Proteobacteria significantly decreased, while the relative abundances of Streptomycetaceae and Geodermatophilaceae belonging to Actinobacteria increased. The results of the metagenomic analysis showed that the gene abundances of carbohydrate metabolism and carbohydrate-activity enzyme (GH and CBM) significantly decreased with the increase of sand deposition amount. The changes in soil microbial community structure and carbon metabolism decreased soil carbon emissions and carbon cycling in aeolian deposition farmland, which may be the essential reasons for land degradation in aeolian deposition farmland.
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