Soil Use Legacy as Driving Factor for Soil Erosion under Conservation Agriculture
نویسندگان
چکیده
Water erosion can cause irreversible depletions in soil quality and crop productivity. The susceptibility of the to is affected by current historical management practices. Historical practices like ploughing or subsoil loosening may lead degradations soils, which turn increases risk. Six “Wischmeier” plots under conservation agriculture, but with different historic treatments regarding use management, were evaluated. These installed 1984 Colonia del Sacramento, Uruguay on a Vertic Argiudoll. objective this study was quantify how changes quality, generated over last 35 years, contribute runoff cropping system using no-till, residue retention cover crops. Considering differences legacy effects previous land use, grouped three contrasting index agricultural intensification (IAI). IAI developed combining duration production number intensity tillage activity resulting treatments: crop-pasture rotation (TIL_CP), no-tillage several rotations (NT_Mix) continuous (TIL_CROP) an increasing 3.5, 7.1 11.8, respectively. Rainfall events, water total, fixed volatile solids studied from 2017 2019. Soil physical (bulk density, penetration resistance, infiltration rate, aggregate stability), chemical (soil organic carbon (SOC), pH, phosphorous (P-Bray)) biological properties (particulate matter (POM), potentially mineralizable nitrogen (PMN)) assessed Yearly average amounted 209, 579 320 mm 2017, 2018 2019, losses 233, 805 139 kg/ha significant among years. lowest observed TIL_CP (231, 615 146 respectively) 3.5. Infiltration rate highest IAI. bulk density (1.3 g/cm 3 ) high SOC PMN TIL_CROP (3.0% 34 mg/kg PMN), holding 11.8. Conservation agriculture minimized all much lower than maximum tolerable threshold 7,000 for particular soil. However, historically intensively tilled cropped showed long-term adverse pointing towards reduced resilience system.
منابع مشابه
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ژورنال
عنوان ژورنال: Frontiers in Environmental Science
سال: 2022
ISSN: ['2296-665X']
DOI: https://doi.org/10.3389/fenvs.2022.822967