检索结果-南通市图书馆

Sheep Production and Breeding Systems in North Western Lowlands of Amhara Region, Ethiopia: Implication for Conservation and Improvement of Gumz Sheep Breed

引用

Open Journal of Animal Sciences 2017年第2期7卷 179-197页

作者： Yohannes Dagnew mengistu Urge Yosef Tadesse Solomon Gizaw Department of Animal Science Bule Hora University Bule Hora Ethiopia School of Animal and Range Science Haramaya University Dire Dawa Ethiopia International Livestock Research Institute Addis Ababa Ethiopia

A questionnaire survey and focused group discussions were conducted to characterize sheep production systems and traditional breeding practices of Gumz sheep as an essential step for designing the Gumz sheep breed conservation and improvement programme. A total of 240 households were included in the study during the period of November 2016 to March 2016. Smallholder farmers kept sheep as a source of income, meat and wealth with an index value of 0.43, 0.19 and 0.15, respectively. Important purposes of large scale farmers for keeping sheep were source of cash income (0.57) and investment opportunity (0.22). Average sheep flock sizes were 17.25 ± 0.68 and 90.63 ± 5.38 at smallholder and large scale production systems, respectively. Smallholder sheep flocks’ composition was 7.47 ± 0.28 Gumz, 3.68 ± 0.25 Rutana and 4.52 ± 0.22 Rutana-Gumz crossbred sheep. The corresponding figures for large scale farms were 21.2 ± 1.4, 30.7 ± 1.69 and 24.7 ± 1.47 sheep. The average numbers of rams in the smallholder sheep flocks were 0.31 ± 0.04 Gumz, 0.39 ± 0.04 Rutana and 0.24 ± 0.03 crossbreds, respectively. The corresponding figures for large scale farms were 3.10 ± 0.13 Rutana and 0.90 ± 0.14 crossbreds. The Gumz sheep was large in number, but farmers prefer Rutana and its crosses than Gumz in both systems. Diseases, stock theft and labour shortage were reported as the main constraints of sheep production. Although the pure Gumz breed meets the multifaceted roles of sheep for the smallholder farmers, the Gumz sheep population was declining in number in the study area due to uncontrolled breeding with Rutana and high preference of farmers for crossbreds over Gumz sheep. It is observed that there is a risk of dilution and loss of genetic diversity of the Gumz sheep. Hence, we recommend designing of conservation-based breeding program to conserve the locally adapted Gumz breed as well as to improve sheep production and productivity in the area through rational utilization of all the t

关键词： Breeding Practices Conservation Gumz Production System

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparative Slaughter Performance and Meat Quality of Rutana, Gumuz and Washera Sheep of Ethiopia Supplemented with Different Levels of Concentrate

引用

Open Journal of Animal Sciences 2020年第1期10卷 48-63页

作者： Anteneh Worku mengistu Urge Getachew Animut Getnet Asefa Department of Animal Sciences Debre Markos University Debre Markos Ethiopia School of Animal and Range Sciences Haramaya University Dire Dawa Ethiopia Agriculture Transformation Agency Addis Ababa Ethiopia Ethiopian Institute of Agricultural Research Addis Ababa Ethiopia

A study was conducted to compare the carcass yield and meat quality of Rutana, Gumuz and Washera sheep of Ethiopia under two concentrate supplement levels (CSL), low (300 g/day) and high (450 g/day). The supplement contains 45% wheat bran, 26% maize grain and 29% Noug cake. A total of 36 sheep (12 from each genotype) were used in 3 × 2 factorial treatment arrangement (3 genotypes and 2 CSL) which was used in a completely randomized block design. Hay was fed ad libitum at a rate of 20% refusal. After the completion of 90 days fattening period, all sheep were slaughtered and meat sample from longissimus dorsi muscle of each animal was taken for sensory evaluation and instrumental measurement of tenderness and for color, pH, and chemical composition analysis. Slaughter body weight (SBW) (26.0 vs. 24.1 kg), hot carcass weight (HCW) (11.3 vs. 9.7 kg), dressing percentage (DP) on SBW (43.4% vs. 40.1%) and EBW basis (53.6% vs. 50.9%), and rib eye-muscle (REM) were higher for the high than low CSL. Rutana sheep had heavier HCW (11.9 kg) than Gumuz (10.1 kg) and Washera (9.4 kg) sheep. DP on EBW basis was higher for Rutana (54.7) than Washera sheep (48.1), while the value for Gumuz (50.9) was similar with both genotypes. Meat from high supplemented sheep had higher fat (9.7% vs. 8.8%), tenderness, juiciness, flavor and lower shear forces than the low level of supplementation. Most sensory parameters measured were in the order of Rutana > Gumuz > Washera sheep. It is concluded that Rutana sheep were relatively more suitable than Gumuz and Washera sheep for production of better carcass yield. The potential of Washera sheep to produce more carcass yield relative to their HCW, SBW and EBW was comparable with that of Gumuz sheep.

关键词： Dressing Percentage Carcass and Non-Caracara Parameters Meat Color Proximate Compositions Sensory Evaluation Shear Force Supplement Sheep

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Correlation study of some physico-chemical parameters and benthic macroinvertebrates metrics on the ecological impacts of floriculture industries along Wedecha River, Debrezeit, Ethiopia

引用

Journal of Coastal Life Medicine 2017年第10期5卷 433-440页

作者： Sisay Misganaw Tamiru Seyoum Leta Asfaw Seyoum mengistu Yilma Department of Development and Environmental Management Studies University of GondarPoBox 196GondarEthiopia College of Natural Science Environmental Science ProgramAddis Ababa UniversityP.O.Box 1176Addis AbabaEthiopia College of Natural Science Department of Zoological SciencesAddis Ababa UniversityP.O.Box 1176Addis AbabaEthiopia

Objective: To assess the quality of water using biological and chemical information correlation study. Methods: A total of 6 sites, one reference site less impaired to represent natural conditions from upstream, and 5 impaired sites in the downstream were sampled for macroinvertebrates and physicochemical parameters. Results: In the polluted sites with high nutrient enrichment and organic loading, only organisms with special physiological and morphological adaptations were found, such as Hydrobiidae, Physidae and Viviparidae snails. Physicochemical parameters: electrical conductivity, chemical oxygen demand, biological oxygen demand, sulphate, orthophosphate and nitrate-nitrogen and metrics: percent of Mollusca, percent of Physidae and percent of dominant taxa were used for monitoring, and expected to have strong positive relation with increasing disturbance. Conclusions: Therefore, floriculture industries wastewater discharged to the nearby rivers has enormous effect on the degradation of the ecosystem. To sustain the ecological conditions of the nearby rivers, wastewater treatment and environmental audit were suggested. Environmental assessment and environmental audit enable the floriculturist to keep humans and the environment safe. Taking care of workers, soil, water and the environment has to be seen with great care and caution because it is difficult to maintain a healthy community and carry out development in a degraded environment.

关键词： Macroinvertebrates Physicochemical Water quality Floriculture Wastewater

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Evaluation of land suitability for Moringa oleifera tree cultivation by using Geospatial technology:The case of Dhidhessa Catchment,Abay Basin,Ethiopia

引用

Oil Crop Science 2023年第1期8卷 45-55页

作者： Mitiku Badasa Moisa Muleta Ebissa Feyissa Indale Niguse Dejene Firdissa Sadeta Tiye Kiros Tsegay Deribew Zenebe Reta Roba mengistu Muleta Gurmessa Dessalegn Obsi Gemeda Department of Agricultural Engineering Faculty of TechnologyWollega University Shambu CampusEthiopia Department of Earth Sciences College of Natural and Computational SciencesWollega University Nekemte CampusNekemteEthiopia Department of Geography and Environmental Studies Wollega UniversityGimbi CampusGimbiEthiopia Department of Geography and Environmental Studies Raya UniversityMaichewEthiopia Department of Forestry College of Natural Resource and Agricultural EconomicsMettu University Bedele CampusEthiopia Department of Fisheries and Aquatic Sciences Faculty of AgricultureWollega University Shambu CampusShambuEthiopia Department of Natural Resource Management College of Agriculture and Veterinary MedicineJimma UniversityEthiopia

Land suitability analysis of Moringa oleifera tree cultivation is important to enhance its product,as the demand forthis tree for medicinal values and food sources is increasing ***,this study aimed to assess suitableland for Moringa oleifera tree cultivation by using the integration of multi-criteria evaluation with geospatialtechnologies in the Dhidhessa catchment,western *** parameters,namely:slope,land use and landcover(LULC),soil texture,land surface temperature,and rainfall data,were used in this *** land suitabilityevaluation of Moringa oleifera is classified into three classes as highly suitable,moderately suitable,and *** results revealed that,about 344.4 km2(12.2%)of the area is categorized into highly suitable,and2343.7 km2(83%)is moderately suitable for Moringa tree,whereas,137.2 km2(4.9%)is categorized as notsuitable for Moringa oleifera tree ***,based on the finding of the study,we suggested that farmers andother stakeholders can cultivate Moringa oleifera trees in the Dhidhessa catchment.

关键词： Moringa tree Medicinal plant Overlay analysis AHP MCE

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of the Sensitivity of Streamflow Simulations to Changes in Patch Resolution Using GIS Based Hydro-Ecologic Model

引用

Open Journal of Modern Hydrology 2016年第2期6卷 66-78页

作者： Samson G. mengistu Melkamu A. Ali Fuad A. Yassin National Hydrology Research Center Environment Canada Saskatoon Canada Global Institute for Water Security University of Saskatchewan Saskatoon Canada

Eight different patch configurations were investigated to analyze the effect of patch characterization/formation in streamflow simulation, using the Regional Hydro-Ecologic Simulation Systems (RHESSys) model. It is investigated for eight different patch configurations of a subcatchment of the Turkey Lakes Watershed, Ontario. The model’s hydrological parameters are calibrated for each of these patch configurations and the performance of the simulations is evaluated. Results indicate that both the nature of the flow simulation and the calibrated parameter values are sensitive to patch configuration. The best simulation results were obtained for the patch configuration with the highest spatial variation of climate, stream network and hillslope conditions across the subcatchment. Different patch configurations also lead to markedly different calibrations of the model’s hydrological parameters (54.26 < k < 119.13;and 1.02 < m < 2.28), which has implications for the physical interpretation and transferability of the calibrated parameter values.

关键词： RHESSys Patch Model Calibration Flow Simulation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Seroprevalence of Helicobacter pylori in dyspeptic patients and its relationship with HIV infection,ABO blood groups and life style in a university hospital,Northwest Ethiopia

引用

World Journal of Gastroenterology 2006年第12期12卷 1957-1961页

作者： Feleke Moges Afework Kassu Getahun mengistu Solomon Adugna Berhanu Andualem Takeshi Nishikawa Fusao Ota Department of Microbiology and Parasitology Gondar College of Medicine and Health SciencesUniversity of GondarEthiopia Department of Preventive Environment and Nutrition Institute of Health BiosciencesThe University of TokushimaJapan Department of Internal Medicine Faculty of MedicineAddis Ababa UniversityEthiopia Department of Biochemistry Gondar College of Medicine and Health SciencesUniversity of GondarEthiopia Department of Biology Faculty of Applied Science.University of Gondar.Ethiopia Hokkaido University of Education Sapporo CampusDivision of Medicine and NursingJapan

AIM： To determine the prevalence of Helicobacter pylori （H pylori） among dyspeptic patients and to assess the relationship between Hpylori infection, blood group, HIV infection and life style of the patients. METHODS： In a hospital-based cross-sectional study, patients attending Outpatient Department of University of Gondar Hospital were enrolled. Socio-demographic information was collected using questionnaires. Serum was analyzed for anti-H pylori IgG antibodies using a commercial kit. HIV serostatus was determined by enzyme-linked immunosorbent assay （ELISA）. Blood grouping was performed by slide agglutination tests. RESULTS： A total of 215 dyspeptic patients were included in the study. One hundred and sixteen patients （54%） were females and 99 （46%） were males. Anti-H pylori IgG antibodies were detected in sera of 184 （85.6%） patients. The prevalence was significantly higher in patients aged 50 years and above. Twenty point five percent of the patients were found to be seropositive for HIV. No significant association was found between sex, ABO blood groups, consumption of spicy diets, socioeconomic status and seropositivity for Hpylori. However,alcohol consumption was significantly associated with H pylori serology. CONCLUSION： The prevalence of H pylori infection is associated with a history of alcohol intake and older age. The effect of different diet, alcohol and socioeconomic status as risk factors for H pylori infection needs further study.

关键词： Hpylori Blood group HIV Life style

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Groundwater Resource in the Crystalline Rocks of the Johannesburg Area, South Africa

引用

Journal of Water Resource and Protection 2011年第4期3卷 199-212页

作者： Tamiru A. Abiye Haile mengistu Molla B. Demlie 不详

Understanding the groundwater dynamics is very important for strategic management of the water resource as urbanization and population growth put South Africa’s current water supply under tremendous stress. The groundwater resources potential and quality characteristics of the greater Johannesburg area, was thoroughly assessed using hydrogeochemical and environmental isotope techniques. The results of the geochemical and stable isotope investigations help understand the groundwater setting. Mixing process of fresh and polluted water is taking place at shallow zones within the weathered crystalline rocks and dissolution cavities in dolomites, where the rocks are characterized by the lithological and structural complexities. Furthermore, it was confirmed that the solute composition of the water results from two basic contributions: the reaction of meteoric water with weathered zones in the near surface area and direct infiltration through dolomite dissolution cavities. The results further indicate that the dominant movement mechanism of ions is through a diffusive process, which could be due to the limited availability of fractures with depth and its possible sealing by calcite precipitation. Consequently, the provenance of groundwater circulation is limited to shallow depths, however, dissolution cavities, fractured and sheared zones allow deeper circulation of groundwater. Moreover, the natural water quality is found to be highly impacted by acid mine drainage which is derived from the gold mines in the Witwatersrand basin as it has been observed in previous studies.

关键词： Crystalline Aquifer Diffusive Circulation Dissolution Cavities Johannesburg Water Supply

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comparative Laying Performance, Egg Quality, Fertility and Hatchability of Guinea Fowl with Tilili, Horro and Potchefstroom Koekoek Chicken Breeds

引用

Open Journal of Animal Sciences 2020年第4期10卷 665-682页

作者： Getnet Zeleke mengistu Urge Getachew Animut Wondmeneh Esatu Tadelle Dessie Amhara Agricultural Research Institute Bahir Dar Ethiopia School of Animal and Range Sciences Haramaya University Dire Dawa Ethiopia Ethiopian Agriculture Transformation Agency Addis Ababa Ethiopia International Livestock Research Institute Addis Ababa Ethiopia

A study was conducted to compare laying performance, fertility, hatchability, and egg quality of guinea fowl (GF) with Horro (HR) and Tilili (TL) local chicken and Potchefstroom Koekoek (PK) exotic chicken. Forty five layers from each genotype and 6 cocks from each chicken genotype and 9 cocks from GF were used in 3 replications in a completely randomized design. Commercial layer feed was used ad libitum for the study that lasted 29 weeks. Daily DM intake per hen was 85, 114, 103 and 137 g (SEM = 3.1) for GF, HR, TL and PK, respectively, and was in the order of GF HR > TL > GF. Average egg weight was higher for PK eggs (46.4 g), intermediate for HR (43.5 g) and TL (42.3 g), and lowest for GF (35.9 g). Eggshell weight and thickness were higher for GF than chicken genotypes. Haugh unit was similar among genotypes. Such differences among poultry genotypes could be reflection of previous selection and breeding interventions, which are apparently more in chicken genotypes than GF. A possible more stressful condition of the confined environment for GF versus chicken genotypes could have also contributed to such differences. This study highlighted the need of implementing future selection and breeding schemes to improve the performance of GF and TL birds to the level achieved by oth

关键词： Guinea Fowl Chicken Egg Number Fertility Hatchability Embryonic Mortality Egg Weight

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Linking Agriculture with Health through Genetic and Agronomic Biofortification

引用

Agricultural Sciences 2016年第5期7卷 295-307页

作者： Anteneh A. Melash Dejene K. mengistu Dereje A. Aberra Department of Dryland crop and Horticultural Sciences Mekelle University Mekelle Ethiopia

Malnutrition and associated health problems are partly related to minerals and vitamins deficiencies where anemia and stunting are the major diseases affecting nearly half of pregnant women and about 20% children under age of five, respectively in developing countries. Despite the significant progress made in recent decades, prevalence of stunting in Ethiopia remains high (44%, among children) that necessitate the country yet to make significant investment in nutrition and health. Strategies designed to overcome the problem range from micronutrient rich foods supplement to complementing foods with vegetables and fruits. However, such strategies are expensive as well as not sustainable to reach the poor households of developing countries. The persistence of the problem calls for agriculture based alternative solutions such as agronomic biofortification and micronutrients biofortification through plant breeding. Utilization of crop wild relatives, local landraces and old cultivars are proved to contain sufficient grain micronutrients and their utilization in breeding programs can solve the deficiency of micronutrients such as zinc and iron. Similarly, agronomic biofortification could improve grain Zn and Fe contents in several folds. Application methods and crop developmental stages during which fortification applied significantly determine the efficiency of fortification. Foliar application at heading and milking stages could accumulate very high Zn and Fe in cereal grains. The synergistic effect of genetic and agronomic fortification could also be utilized to produce Zn and Fe rich food crops. Hence, linking agriculture with nutrition and health could offer equitable, effective, sustainable and cheap solutions to micronutrients malnutrition and their deficiency related health problems.

关键词： Agriculture Linkage Micronutrients Malnutrition Biofortification

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sensory Characteristics, Nutritional Composition, and Quality of Eggs from Different Chickens

引用

Open Journal of Animal Sciences 2022年第4期12卷 591-615页

作者： Atsbaha Hailemariam Wondmeneh Esatu Solomon Abegaz mengistu Urge Getnet Assefa Tadelle Dessie Ethiopia Agricultural Research Institute Mekhoni Agricultural Research Center Mekhoni Ethiopia International Livestock Research Institute Addis Ababa Ethiopia Ethiopia Agricultural Research Institute Debrezeit Agricultural Research Center Bishoftu Ethiopia Haramaya University School of Animal and Range Sciences Dire Dawa Ethiopia Ethiopian Institute of Agricultural Research Addis Ababa Ethiopia

The present study evaluated the sensory, composition, and quality of eggs from Cosmopolitan (C), Improved Horro (H), ♂ Improved Horro * Cosmopolitan ♀ (HC), ♂ Cosmopolitan * Improved Horro ♀ (CH), Indigenous(L), and Koekoek (KK) genotypes. A completely randomized design was used in the study. A total of 108 (18/genotype), 180 (30/genotype), and 90 (15/genotype) eggs were used for the sensory, composition, and egg quality tests, respectively. All data were analyzed following the GLM model using SAS software. The boiled and scrambled eggs from L, H, and C were (P ≤ 0.001) preferred followed by CH, HC, and KK. Results showed that KK, HC, CH, and C eggs were higher in moisture, crude fat, crude ash, and crude fiber, but these traits were found lower in H and L genotypes. A significantly highest crude protein was observed in L (21.19 ± 0.19) genotype, with higher in H (20.62 ± 0.26), intermediate in HC (19.96 ± 0.29), C (19.85 ± 0.10), and CH (19.40 ± 0.37), whereas the eggs from KK genotype had the lowest crude protein content (18.69 ± 0.20). The egg quality was (P = 0.001 - 0.01) affected across traits except for eggshell indices (P > 0.05). The genotypes with a negative significant correlation with crude protein had a positive significant correlation with almost all composition and egg external quality traits. The genotypes with positive significant correlations of egg weight had positive significant correlations with most internal egg quality traits except that of yolk weight ratio, yolk albumen ratio, and yolk color. Conclusively: the eggs of L, H, and C genotypes were best favored followed by CH and C, but the KK genotype was the least favored, and these differences were deemed due to genetic variations, and interventions. Furthermore, the eggs laid from genotypes with deep yellow yolk color might be the most nutritious. It could also necessitate future breeding and dietary studies.

关键词： Chicken Sensory Characteristics Nutritional Composition Egg Quality Correlation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：