Soil organic matter fractions and carbon distribution under different management in Lesotho, southern Africa
نویسندگان
چکیده
Soil organic matter (SOM) is a complex mixture of multiple fractions soil C (SOC) that can be influenced by management decisions. This study evaluate the effects tillage (moldboard plow [MP] and no-tillage [NT]) commercial fertilizer as limestone ammonium nitrate (28–0–0) at three rates (0 [0-N], 100 [100-N], 200 [200-N] kg N ha–1) on SOC, total (STN), SOM (total particulate matter-C [POM-C] mineral-associated [MAOM-C]). The was established in 2008 National University Lesotho Campus Farm, Roma Valley Maseru District Lesotho, southern Africa. classified Berea series. samples were collected from 0-to-5-, 5-to-10-, 10-to-15-, 15-to-30-cm depths. Under NT, STN, POM 0-to-15-cm 54, 47, 40% higher than depth, respectively. Differently, MP had 17, 35% depth. SOC increased 27% with 36% NT 200-N compared 100-N rate. highest N-rate (200-N) 28.8% for 22.6% the100-N greater increase under high rate probably related to low initial POM, where small changes will pronounced, whereas could mask effect addition. coarse fine accounted 39 61%, respectively, both MP. percentage observed within fraction (48.4%) MP, which makes it susceptible wind erosion, MAOM (48.9%) practice. C/N ratio (C/N ≈ 25) lowest 7.2) practices. made MAOMC vulnerable microbial decomposition. These findings suggest need conservation efforts used reduce losses contribute improve land sustainability conservation.
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ژورنال
عنوان ژورنال: Soil Science Society of America Journal
سال: 2022
ISSN: ['0361-5995', '1435-0661']
DOI: https://doi.org/10.1002/saj2.20471