2021, Vol. 8 Issue 3, Part A
Evaluation of selected multipurpose tree species and moisture conservation structures for degraded dryland rehabilitation in Dugda Dawa district, Southern Ethiopia
Author(s): Siraj Kelil, Sisay Taye, Desta Negeyo, Feyisa Seboka, Hayleyesus Agonafer, Tadesa Negash and Bultu Kusa
Abstract: Land degradation is widespread and a serious threat affecting the livelihoods of people living in dryland areas of worldwide, particularly the countries in Sub-Saharan Africa like Ethiopia. Degraded land rehabilitation in dryland regions is a challenging task due to moisture limitation, recurred drought. This study was conducted to evaluate the effects of soil and water conservation structures on survival and growth of planted trees/shrubs species and rehabilitation of indigenous plant species in West Guji Zone, Dugda Dawa District from June 2014 to June 2017. Four multipurpose tree/shrub species namely Faidherbia albida, Melia azadiricta, Moringa stenopitala, and Sesbania sesban were planted in four experimental soil and moisture conservation structures namely soil level bund, half-moon, trench and normal pit. The study combined the survival rate, height and diameter growth of planted multipurpose tree species; diversity and species richness of indigenous plant species before and after the intervention. The study was carried out for four consecutive years. The survival rate of all planted MPTs species in all treatments showed a declining trend along the study years and, under control treatments, all planted MPTs died at the end of the study period. The survival rate of the planted MPTs species at the end of the study period under soil level bund, half-moon and trench were statistically not significantly different except that of Melia azadiricta (p < 0.01). However, the survival rate of all species was better under soil level bund and half-moon. The height and diameter growth of Faidherbia albida, and Moringa stenopitala were best in soil level bund and half-moon and lowest in the trench. Whereas, the diameter and height growth of Melia azadiricta was best in soil level bund followed by half-moon and trench. The growth performance of Sesbania sesban was not significantly different among the three moisture conservation structures. Thus, the new planting techniques using soil moisture conservation structures improve the survival rate and growth performance of the species. Furthermore, degraded land rehabilitation using soil moisture conservation structures increased the regenerations of indigenous plant species. The indigenous plant species diversity, richness and number of individual plants per plot were significantly increased after the intervention. The mean indigenous plant species diversity, richness and number of individual plants per plot were significantly highest in half-moon and soil level bund followed by trench and, lowest in Control (normal pit). This suggests that the new planting technique is more suitable than the conventional method of tree planting and habilitation of indigenous plant species. Thus, the results of this study represent a potentially valuable alternative for forest restoration and soil conservation in arid areas.
Pages: 11-20 | 13 Views 6 Downloads
How to cite this article:
Siraj Kelil, Sisay Taye, Desta Negeyo, Feyisa Seboka, Hayleyesus Agonafer, Tadesa Negash, Bultu Kusa. Evaluation of selected multipurpose tree species and moisture conservation structures for degraded dryland rehabilitation in Dugda Dawa district, Southern Ethiopia. Int J Fauna Biol Stud 2021;8(3):11-20.