Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.geoderma.2016.03.022 |
Long-term assessment of soil and water conservation measures (Fanya-juu terraces) on soil organic matter in South Eastern Kenya | |
Saiz, Gustavo1; Wandera, Fredrick M.2; Pelster, David E.2; Ngetich, Wilson3; Okalebo, John R.3; Rufino, Mariana C.4; Butterbach-Bahl, Klaus1,2 | |
通讯作者 | Saiz, Gustavo |
来源期刊 | GEODERMA
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ISSN | 0016-7061 |
EISSN | 1872-6259 |
出版年 | 2016 |
卷号 | 274页码:1-9 |
英文摘要 | A comprehensive assessment of soil organic matter (SOM) dynamics in semi-arid agrosystems implementing soil and water conservation (SWC) measures is still lacking despite their extent, ecological and economic significance. Therefore, we assessed the long-term impact of a commonly used SWC technique (Fanya-juu terracing) on SOM-related properties in South Eastern Kenya. A soil sampling campaign was conducted in a replicated stratified random manner on three land uses that had been continuously managed for over 30 years. Samples were analyzed for organic carbon and nitrogen contents, delta C-13, delta N-15 pH and texture. Compared to sites implementing conventional agriculture, the establishment of SWC structures in this erosion-prone landscape resulted in the recovery of SOM levels comparable to those observed in neighboring semi-natural ecosystems. Sites under conventional agriculture practices contained 20 Mg C ha(-1) (0.85 m), while sites with SWC measures and those hosting semi-natural vegetation stored above a third more. There were significant differences in soil C/N ratios as well as in delta C-13 and delta N-15 values between SWC cultivation practices classified according to the presence or absence of trees. The presence of woody vegetation in sites with SWC structures had a strong impact on the spatial variability of SOM-related properties. There was also a significant negative relationship between delta N-15 values and C/N ratios across the different land uses. Our findings indicate the existence of contrasting SOM dynamics caused by vegetation-related effects, and provide suggestions for enhancing SOM storage in agricultural sites implementing SWC measures. (C) 2016 Elsevier B.V. All rights reserved. |
英文关键词 | Semi-arid ecosystems Soil water conservation Climate-smart agriculture Small household farms Soil organic carbon Stable isotopes |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Kenya |
收录类别 | SCI-E |
WOS记录号 | WOS:000376543600001 |
WOS关键词 | TREE-GRASS INTERACTIONS ; CARBON STOCKS ; PRECIPITATION GRADIENT ; SPATIAL VARIABILITY ; ECOSYSTEM SERVICES ; N2O EMISSIONS ; BULK-DENSITY ; NITROGEN ; PLANT ; VEGETATION |
WOS类目 | Soil Science |
WOS研究方向 | Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/193192 |
作者单位 | 1.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, D-82467 Garmisch Partenkirchen, Germany; 2.Int Livestock Res Inst, Livestock Syst & Environm, Nairobi 3070900100, Kenya; 3.Univ Eldoret, Dept Soil Sci, POB 1125, Eldoret, Kenya; 4.Ctr Int Forestry Res CIFOR, POB 30677, Nairobi, Kenya |
推荐引用方式 GB/T 7714 | Saiz, Gustavo,Wandera, Fredrick M.,Pelster, David E.,et al. Long-term assessment of soil and water conservation measures (Fanya-juu terraces) on soil organic matter in South Eastern Kenya[J],2016,274:1-9. |
APA | Saiz, Gustavo.,Wandera, Fredrick M..,Pelster, David E..,Ngetich, Wilson.,Okalebo, John R..,...&Butterbach-Bahl, Klaus.(2016).Long-term assessment of soil and water conservation measures (Fanya-juu terraces) on soil organic matter in South Eastern Kenya.GEODERMA,274,1-9. |
MLA | Saiz, Gustavo,et al."Long-term assessment of soil and water conservation measures (Fanya-juu terraces) on soil organic matter in South Eastern Kenya".GEODERMA 274(2016):1-9. |
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