Arid
DOI10.1186/s13717-019-0190-8
Dispersed trees on smallholder farms enhance soil fertility in semi-arid Ethiopia
Gebrewahid, Yikunoamlak1; Teka, Kassa2; Gebre-Egziabhier, Tewolde-Berhan3; Tewolde-Berhan, Sara2; Birhane, Emiru2,4; Eyasu, Gebru5; Meresa, Esayas5
通讯作者Gebrewahid, Yikunoamlak
来源期刊ECOLOGICAL PROCESSES
EISSN2192-1709
出版年2019
卷号8期号:1
英文摘要Introduction Dispersed trees such as Oxytenanthera abyssinica (A. Rich.) and Dalbergia melanoxylon (Guill. & Perr.) which are objectively maintained or planted on farmland provide a significant contribution to soil fertility improvement. However, there was no quantitative information on the level of soil nutrient additions of these trees to the soil system. Methods This study was conducted on the farmers' fields in Kafta Humera district, Tigray region (northern Ethiopia), where mature stands of O. abyssinica and D. melanoxylon trees exist. Radial distance-based soil sampling (under the canopy, near to canopy, and far from canopy) was adopted to quantify the role of these trees on soil fertility improvement. Soil parameters tested were soil reaction (pH), total nitrogen (TN), available phosphorus (AvP), electrical conductivity (EC), cation exchange capacity (CEC), and organic carbon (OC). Results There was a negative linear relationship between the radial distance of the O. abyssinica tree trunk and soil TN, OC, CEC, and AvP contents but not for pH. Similarly, negative linear relationship between distance from D. melanoxylon and TN, OC, and AvP was obtained. The average total nitrogen (0.26% and 0.13%), available phosphorus (7.21 ppm and 6.37 ppm), and organic carbon (1.73% and 1.02%) contents were respectively higher under the tree canopies of O. abyssinica and D. melanoxylon compared with the adjacent open canopies. The amount of soil OC, TN, AvP, and CEC under O. abyssinica tree species was also significantly higher by 69%, 100%, 13%, and 42% compared to that of D. melanoxylon tree species. However, the amount of EC and soil pH was significantly lower by 57% and 19%, respectively. Conclusion In general, O. abyssinica and D. melanoxylon added a significant amount of nutrients to the soil. Thus, retaining these important tree species on farmland played a positive role in replenishing soil fertility for resource-constrained households so as to reduce chemical fertilizer amendments.
英文关键词Scattered tree Oxytenanthera abyssinica Dalbergia melanoxylon Soil properties
类型Article
语种英语
国家Ethiopia ; Norway
开放获取类型gold
收录类别SCI-E
WOS记录号WOS:000484440400001
WOS关键词AGROFORESTRY SYSTEM ; FOREST ; SAVANNA ; IMPACTS
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/215229
作者单位1.Tigray Agr Res Inst, Humera Agr Res Ctr HuARC, POB 62, Humera, Ethiopia;
2.Mekelle Univ, Dept Land Resources Management & Environm Protect, POB 231, Mekelle, Ethiopia;
3.Minist Environm Forest & Climate Change Ethiopia, Addis Ababa, Ethiopia;
4.Norwegian Univ Life Sci, Fac Environm Sci & Nat Resource Management, POB 5003, NO-1432 As, Norway;
5.Tigray Agr Res Inst, Mekelle Agr Res Ctr, POB 258, Mekelle, Ethiopia
推荐引用方式
GB/T 7714
Gebrewahid, Yikunoamlak,Teka, Kassa,Gebre-Egziabhier, Tewolde-Berhan,et al. Dispersed trees on smallholder farms enhance soil fertility in semi-arid Ethiopia[J],2019,8(1).
APA Gebrewahid, Yikunoamlak.,Teka, Kassa.,Gebre-Egziabhier, Tewolde-Berhan.,Tewolde-Berhan, Sara.,Birhane, Emiru.,...&Meresa, Esayas.(2019).Dispersed trees on smallholder farms enhance soil fertility in semi-arid Ethiopia.ECOLOGICAL PROCESSES,8(1).
MLA Gebrewahid, Yikunoamlak,et al."Dispersed trees on smallholder farms enhance soil fertility in semi-arid Ethiopia".ECOLOGICAL PROCESSES 8.1(2019).
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