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首页> 外文期刊>Plant and Soil >Shifting cultivation maintains but its conversion to mono-cropping decreases soil carbon and nitrogen stocks compared to natural forest in Western Ethiopia
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Shifting cultivation maintains but its conversion to mono-cropping decreases soil carbon and nitrogen stocks compared to natural forest in Western Ethiopia

机译：换档维持，但与西埃塞俄比亚西部的自然森林相比，它对单次种植的转化降低了土壤碳和氮素股

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Aims This study was conducted to assess the effects of shifting cultivation and its conversion to mono-cropping on soil organic carbon (SOC) and total nitrogen (STN). Methods We compared soil pH, texture, bulk density and SOC and STN contents and stocks (0-100 cm) in natural forest (NF), adjacent shifting cultivation (SC) areas (> 100 years old) having three (SC-3Y), five (SC-5Y) and seven (SC-7Y)-year-old fallowing, and 10 year-old mono-cropping field (MCF) converted from shifting cultivation in Western Ethiopia. Results There was no significant difference in soil pH in NF and all shifting cultivation areas. However, MCF had lower soil pH compared to SC-3Y and SC-5Y. There was no or very little difference in soil texture and bulk density across the study sites. Shifting cultivation did not affect SOC and STN stocks. However, conversion of shifting cultivation to mono-cropping decreased SOC (45-50% over 10 years; loss of 11.6 +/- 0.2 Mg C ha(-1) yr.(-1)) and STN stocks (18-45% over 10 years; loss of 0.6 +/- 0.1 Mg N ha(-1) yr.(-1)). Conclusions While shifting cultivation maintained SOC and STN, its conversion to mono-cropping decreased them, potentially contributing to global warming and decreasing soil fertility.
机译：目的本研究旨在评估栽培栽培及其转化对土壤有机碳（SOC）和总氮（STN）的单次种植的影响。方法对天然森林（NF）的土壤pH，质地，批量密度和SOC和STN含量（0-100厘米）进行比较，邻近换档栽培（SC）区域（> 100岁）（SC-3Y） ，五（SC-5Y）和七（SC-7Y） - 旧的堕落和10岁的单次种植领域（MCF）转换在西埃塞俄比亚的转移栽培。结果NF和所有移位栽培区土壤pH没有显着差异。然而，与SC-3Y和SC-5Y相比，MCF具有较低的土壤pH pH。研究地点的土壤纹理和批量密度没有或很小。移位栽培不影响SOC和STN股票。然而，将栽培转化为单次种植减少SOC（超过10年的45-50％;损失11.6 +/- 0.2 mg C ha（-1）yr。（ - 1））和STN股（18-45％）超过10年;损失为0.6 +/- 0.1 mg n（-1）yr。（ - 1））。结论在换档栽培的同时维持SOC和STN，它对单次种植的转换减少了它们，可能导致全球变暖和降低土壤肥力。

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