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Productivity of Intercropping with Tomato and Basil under Different Planting Densities at Wondo Genet, Ethiopia 埃塞俄比亚Wondo Genet不同种植密度下番茄与罗勒间作的生产力
Pub Date : 2022-01-01 DOI: 10.7176/alst/91-03
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引用次数: 1
Evaluation of Vegetative Growth Parameters of Almond Varieties (Prunus Amygdalus L.) at Holleta, Central Highlands of Ethiopia 埃塞俄比亚中部高原Holleta地区扁桃品种营养生长参数评价
Pub Date : 2022-01-01 DOI: 10.7176/alst/91-01
Tajebe Mosie, Getaneh Seleshi, Habtam Setu
The study's goal was to evaluate almond cultivars' vegetative growth performance and adaptability under Holetta conditions. The trial was carried out at the Holetta Agricultural Research Center with four almond varieties arranged in RCBD and three times replicated. Ferraduel had the highest tree height of 129.58 cm in the first growing season of 2011, followed by Desmayo (108.75 cm), Ferragnes (96.17 cm), and Marcona (95.56 cm). The Ferraduel variety has the highest recorded height except in 2014 and 2015. Annual growth differed significantly between years, with 2015 recording the most (42.7 cm) and 2013 following closely after (32.8 cm). The cross-sectional area of a tree trunk increased in general as the growth season progressed. In 2011, Marcona had the lowest TCSA (2.04 cm 2 ), whereas Ferragnes (86.58 cm 2 ) had a much lower TCSA in 2016. The exponential canopy stretch was somewhat limited from 2012 to 2013. The growing season 2016 has the most main branches, followed by the growing season 2013, with the values of 3.44 and 3.14, respectively. While the 2014 growing season had the fewest major branches, followed by the 2015 growing season with values of 2.19 and 2.58, respectively. Across all growing seasons, the Desmayo variety exhibited the highest branching height. With increasing tree height, TCSA and canopy stretch grow linearly. It also shows non-linear positive correlations of 0.43 and 0.35 with yearly growth rate and branching height, respectively.
本研究的目的是评价杏仁品种在Holetta条件下的营养生长性能和适应性。该试验在Holetta农业研究中心进行,四个杏仁品种被安排在RCBD中,并重复了三次。2011年第一生长期,菲拉多尔树高最高,达129.58 cm,其次是德斯马约(108.75 cm)、费拉格内(96.17 cm)和马尔科纳(95.56 cm)。除2014年和2015年外,Ferraduel品种的高度最高。不同年份的年增长率差异很大,2015年最高(42.7厘米),2013年紧随其后(32.8厘米)。随着生长季节的进行,树干的横截面积一般会增加。2011年,Marcona的TCSA最低(2.04 cm 2),而2016年Ferragnes的TCSA要低得多(86.58 cm 2)。2012 ~ 2013年,林冠指数扩张有所限制。以2016年生长季为主枝最多,其次为2013年生长季,分别为3.44和3.14。2014生长季主要枝数最少,2015生长季次之,分别为2.19和2.58。在所有生长季节中,Desmayo品种的分枝高度最高。随着树高的增加,TCSA和冠层拉伸呈线性增长。与年生长率和分枝高分别呈0.43和0.35的非线性正相关。
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引用次数: 0
Water, Nutrients, Radiation and CO2 Use Efficiency of Bulb Crops: A Review 球茎作物水分、养分、辐射和CO2利用效率研究进展
Pub Date : 2021-11-01 DOI: 10.7176/alst/90-02
Merkebu Ayalew
World’s natural resource will be pressured by population increment that is to achieve high food production through intensive farming. Bulb crops are among largely produced which are characterized by a shallow root system and underground vertical shoots. They are also cool season crops, and their growth and production are influenced by water, nutrients, radiation and carbon-dioxide. Factors that determine their water use efficiency are tillage, stage of the crop, evapotranspiration, irrigation, soil types and elevated co 2 . Nutrient use efficiency of bulbs also influenced by factors like soil factors, fertilizer factors, plant factors, agronomic consideration, biological consideration and climate factors. Nitrogen, phosphorus and potassium are the major consumed nutrients of bulbs. Radiation use efficiency of the bulbs also the key determinant of photosynthesis, photorespiration and respiration. Indicators of radiation use efficiency of bulbs are dry matter production, leaf area index and specific leaf area, ground cover, radiation interception and absorption, maintenance respiration of bulbs and dry matter partitioning. Another essential substrate for photosynthesis of bulb crops is co 2 and the main factors that determine co 2 use efficiency of bulbs are temperature and light. So as different studies indicated that for best production of bulb crops water, nutrient, radiation and co 2 use efficiency of them and the respective determinant factors should be considered and optimized.
世界自然资源将受到人口增长的压力,即通过集约化农业实现高粮食产量。鳞茎作物是大量生产的作物之一,其特点是根系浅,地下垂直。它们也是凉季作物,它们的生长和生产受水、养分、辐射和二氧化碳的影响。决定其水分利用效率的因素是耕作方式、作物生长阶段、蒸散、灌溉、土壤类型和二氧化碳浓度升高。鳞茎养分利用效率还受土壤因素、肥料因素、植物因素、农艺因素、生物因素和气候因素的影响。氮、磷、钾是球茎消耗的主要营养物质。球茎的辐射利用效率也是决定光合作用、光呼吸和呼吸作用的关键因素。球茎辐射利用效率的指标有干物质产量、叶面积指数和比叶面积、地被覆盖、辐射拦截和吸收、球茎维持呼吸和干物质分配。球茎作物光合作用的另一个重要基质是二氧化碳,而决定球茎对二氧化碳利用效率的主要因素是温度和光照。因此,不同的研究表明,为了球茎作物的最佳生产,应考虑和优化球茎作物的水分、养分、辐射和co2利用效率及其各自的决定因素。
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引用次数: 0
Performance Evaluation of Onion Varieties at Biyo Awale Cluster in Diredawa Administration Diredawa县Biyo Awale集群洋葱品种性能评价
Pub Date : 2021-11-01 DOI: 10.7176/alst/90-01
Fikadu Tadesse, F. Yemane, M. Jafar
Onion (Allium cepa L.) is an important crop worldwide. It is important in the daily Ethiopian diet. It is widely produced by small farmers and commercial growers throughout the year for local use and export market. No strong study has been conducted to evaluate the suitability of onion cultivation in Biyo Awale district of Diredawa. Hence, the present experiment was conducted to study the performance of improved varieties of onion for their suitability for cultivation in Biyo Awale district of Diredawa. The study was carried out during 20182019 cropping season to test the performance of onion varieties. Five high yielding onion varieties were planted in complete randomized block design experiment with three replications including local check at farmer’s field. The quantitative data on bulb yield, plant height, bulb size and number of leaves of onion varieties were collected. Harvesting was done and weighed when all onion varieties reach maturity (90% tops down). The results revealed that the tested onion varieties differ significantly for leaf length, leaf number, neck diameter, bulb diameter, average bulb weight and bulb yield. Among the varieties Bombay red and Melkam produced higher bulb yield (25.56 and 21.13 t ha) and gave 140.68% and 98.96% yield advantage over local check varieties, respectively. Therefore, Bombay Red and Melkam varieties were recommended to the study area and similar agro-ecology.
洋葱(Allium cepa L.)是世界范围内的重要作物。它在埃塞俄比亚人的日常饮食中很重要。小农和商业种植者全年广泛生产,供当地使用和出口市场。对Diredawa Biyo Awale地区洋葱种植的适宜性尚未进行强有力的研究。因此,本试验旨在研究洋葱改良品种在Diredawa Biyo Awale地区的适宜性。该研究在2018 - 2019种植季节进行,以测试洋葱品种的性能。采用完全随机区组设计试验,在农户田间种植5个高产洋葱品种。收集了洋葱品种的鳞茎产量、株高、鳞茎大小和叶片数的定量数据。当所有洋葱品种达到成熟期(90%自上而下)时进行收获和称重。结果表明,不同洋葱品种在叶长、叶数、颈径、鳞茎直径、平均鳞茎重和鳞茎产量上存在显著差异。其中Bombay red和Melkam的鳞茎产量较高(25.56 t hm2和21.13 t hm2),产量优势分别为140.68%和98.96%。因此,推荐Bombay Red和Melkam品种用于研究区和类似的农业生态。
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引用次数: 1
Production Performance, Consequence and Constraints of Small Ruminants in Ethiopia: A Review 埃塞俄比亚小反刍动物的生产性能、后果和制约因素综述
Pub Date : 2021-11-01 DOI: 10.7176/alst/90-03
Abera Geleta Sime
Livestock are an integral part of agriculture that contribute to 35 to 49% of the agricultural GDP, 37 to 87% of the household incomes, and 15 to 17% of the foreign exchange earnings of the country. There are about 33.02 million heads of sheep and 38.96 million heads of goats’ population in Ethiopia. They are important components of the livestock subsector and are sources of cash income, milk, meat, wool, manure, and saving or risk mitigation during crop failures, property security, monetary saving and investment in addition to many other socioeconomic and cultural functions. Despite their large number, the reproductive, as well as productive traits of small ruminant are affected by several factors including breed, a season of conception, interval between parturitions, age, sex and health and nutritional status of the individual animal. Therefore, this paper is to review of concerned issue on reproductive and productive performances, consequence and constraints of small ruminants in Ethiopia.
畜牧业是农业的一个组成部分,占农业国内生产总值的35%至49%,占家庭收入的37%至87%,占国家外汇收入的15%至17%。埃塞俄比亚大约有3302万头绵羊和3896万头山羊。它们是畜牧分部门的重要组成部分,是现金收入、牛奶、肉类、羊毛、粪肥的来源,除了许多其他社会经济和文化功能外,还具有作物歉收期间的储蓄或风险缓解、财产安全、货币储蓄和投资等功能。尽管数量众多,但小型反刍动物的繁殖和生产特性受到多种因素的影响,包括品种、受胎季节、分娩间隔、年龄、性别以及个体动物的健康和营养状况。因此,本文就埃塞俄比亚小反刍动物的繁殖和生产性能、后果和制约因素等相关问题进行综述。
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引用次数: 0
Information Technology Readiness and the Assessment and Adoption of Information Technology Innovativeness 信息技术准备与信息技术创新的评估与采用
Pub Date : 2021-11-01 DOI: 10.7176/alst/90-04
Anas
Government Information Technology Innovativeness defined as notion of openness to new information technology ideas in the government as an aspect of an organizational culture. In adopting the information technology innovativeness, information technology readiness plays a crucial effect. Misunderstood organizational characteristic within information technology innovativeness may generate unrealistic or inaccurate outcomes. Unfortunately, the effect of organizational context is nearly ignored in information technology innovativeness literature. In response, using the Resources based view (RBV) and Diffusion-Innovation-Theory (DIT), this paper argues on the interaction between the influence of organizational characteristic (information technology readiness), so as to explain information technology innovativeness. This proposition could improve understanding the information technology innovativeness and help to resolve inconsistency of findings in the literature. This study investigate the level of government information technology innovativeness in local through makers and managers by investigating the relationship between technology readiness and government information technology innovativeness. It further aims to assess governmental readiness by studying the information technology readiness effect on government information technology innovativeness.
政府信息技术创新被定义为政府对新信息技术理念的开放态度,是组织文化的一个方面。在采用信息技术创新的过程中,信息技术准备度起着至关重要的作用。误解信息技术创新中的组织特征可能会产生不现实或不准确的结果。不幸的是,在信息技术创新的文献中,组织情境的作用几乎被忽视了。为此,本文运用资源基础理论(resource based view, RBV)和扩散创新理论(diffusion - innovation theory, DIT),论证了组织特征(information technology readiness)对信息技术创新的交互影响,从而解释了信息技术创新。这一命题可以提高对信息技术创新的理解,并有助于解决文献研究结果的不一致。本研究通过研究技术准备度与政府信息技术创新的关系,通过决策者和管理者来考察地方政府信息技术创新水平。通过研究信息技术准备对政府信息技术创新的影响,进一步评估政府准备程度。
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引用次数: 0
Acute Toxicity and Antidiabetic Studies of Adansonia digitata Stem Bark Extracts on Streptozotocin Induced Diabetic Rats 苦参树皮提取物对链脲佐菌素诱导的糖尿病大鼠的急性毒性及降糖作用研究
Pub Date : 2021-08-01 DOI: 10.7176/alst/89-04
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引用次数: 0
Response of Onion (Allium Cepa L,) to Different Irrigation Levels Under Conventional Furrow Irrigation With and Without Mulch at Melkassa , Central Rift Valley of Ethiopia 埃塞俄比亚中部大裂谷Melkassa常规沟灌条件下洋葱(Allium Cepa L,)对不同灌溉水平的响应
Pub Date : 2021-08-01 DOI: 10.7176/alst/89-03
Gebeyehu Ashemi
Water is a scarce resource in Central Rift Valley of Ethiopia and is a major limiting factor for crop production. Onion is one of the major economically important vegetable crops grown under irrigation in central rift valley. The field experiment was conducted at Melkasa agricultural research center during the dry season to identify conventional furrow irrigation and irrigation application level with and without mulch that maximizes productivity of onion per unit of water consumed and enhanced onion crop production. The experiment was carried out using RCB design having six treatments with three replications. The FAO’s recommended allowable Manageable depletion level of onion is 100%. In this study 75%, 100% recommended and 125% were tested. The analysis of variance for the result of the study indicated highly significant (P ≤ 0.05) differences for yield, yield components and WUE’s. The highest yield of 320.7 ton/ha was obtained from the 75% MAD with mulch which was not significantly (P≤0.05) different to the 100% MAD irrigation level. In terms of irrigation and water use efficiency, 75% MAD irrigation level application gave the highest IWUE which was significantly different from all other treatment combinations. Yield and water use efficiency based comparison had shown that there was significant difference between the yield, CWUE, and IWUE obtained in the treatment. Therefore, it can be concluded that increased water saving and associated water productivity through the use of 75% MAD with Conventional furrow irrigation and mulch, can solve problem of water shortage which improve WUE without significant reduction of yield. 75% MAD irrigation level water applied system and mulch appears to be a promising alternative for water conservation and labor saving with negligible trade-off in yield.
在埃塞俄比亚中部大裂谷,水是一种稀缺资源,是作物生产的主要限制因素。洋葱是中部大裂谷灌溉栽培的主要经济蔬菜作物之一。旱季在Melkasa农业研究中心进行了田间试验,以确定常规沟灌和有地膜和无地膜的灌溉施用水平,以最大限度地提高洋葱单位耗水量的生产力,提高洋葱作物产量。试验采用RCB设计,6个处理,3个重复。粮农组织建议允许的洋葱可管理损耗水平为100%。在这项研究中,75%,100%被推荐,125%被测试。方差分析表明,产量、产量成分和水分利用效率差异极显著(P≤0.05)。覆盖75% MAD的最高产量为320.7 t /ha,与100% MAD灌溉水平差异不显著(P≤0.05)。在灌溉和水分利用效率方面,75% MAD灌溉水平施用的IWUE最高,与其他处理组合差异显著。基于产量和水分利用效率的比较表明,处理的产量、CWUE和IWUE之间存在显著差异。综上所述,在常规沟灌加地膜的基础上,利用75%的MAD增加节水和相应的水生产力,可以在不显著降低产量的情况下解决水资源短缺问题,提高水分利用效率。75% MAD灌溉水平的施水系统和地膜似乎是一种有希望的节水和节约劳动力的替代方案,而产量的损失可以忽略不计。
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引用次数: 1
The Quality of Tomato (Solanum Lycopersicum L.) After Pre Storage CaCl2 and Edible Coating Treatment 番茄品质的研究贮藏前CaCl2和可食用涂层处理后
Pub Date : 2021-08-01 DOI: 10.7176/alst/89-02
Zebider Shite
Tomatoes are a high-value crop all over the world, including Ethiopia. Tomato ripening is highly dependent on ethylene action as a climacteric fruit, making this fruit highly perishable in a short period of time. Pre-storage treatments such as CaCl 2 and edible coatings are essential for preserving fruit quality after harvest and extending shelf life. The purpose of this study was to determine the effect of CaCl 2 and edible coatings on tomato postharvest quality and shelf life. The experiment was set up in the form of a Complete Randomized Design with three replications. The results revealed that both CaCl 2 and edible coatings had a highly significant (p˂0.01) effect on tomato shelf life and quality. Fruits treated with 6% CaCl 2 and coated with aloe Vera gel and beeswax significantly reduced physiological weight loss (PLW), percentage decay, TSS, pH of tomato juice, and ascorbic acid loss during storage, and increased the shelf life of the fruits by 15 days when compared to the control. The combination of treatments (6 percent CaCl 2 with AG and BW coating) resulted in the highest fruit marketability, firmness, and ascorbic acid levels over the storage period. According to the findings of the study, the combination of treatments 6 percent CaCl 2 with aloe Vera gel or bees wax can be recommended for Shanty tomato in terms of shelf life and quality. Keywords: fruit marketability, pre storage, shelf life, tomato, quality DOI: 10.7176/ALST/89-02 Publication date: August 31 st 2021
西红柿在全世界都是高价值作物,包括埃塞俄比亚。番茄的成熟高度依赖于乙烯的作用,作为一种更年期水果,使这种水果在短时间内极易腐烂。贮藏前处理,如氯化钙和可食用涂层,对于保存果实收获后的品质和延长保质期至关重要。本研究的目的是确定氯化钙和食用涂层对番茄采后品质和保质期的影响。试验采用完全随机设计,3个重复。结果表明,cacl2和食用涂层对番茄的保质期和品质都有极显著的影响(p小于0.01)。与对照相比,6% cacl2处理后涂有芦荟凝胶和蜂蜡的果实在贮藏过程中显著降低了生理失重(PLW)、腐烂率、TSS、番茄汁pH值和抗坏血酸损失,并将果实的保质期延长了15天。在贮藏期间,6% cacl2加AG和BW包衣的组合处理使果实具有最高的适销性、硬度和抗坏血酸水平。根据研究结果,就保质期和质量而言,建议将6%氯化钙与芦荟凝胶或蜂蜡结合使用。关键词:水果适销性,预储存,保质期,番茄,质量DOI: 10.7176/ALST/89-02出版日期:2021年8月31日
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引用次数: 0
Genotype x Environment Interaction and Its Stability Measures; Major emphasis in Arabica Coffee: A Review 基因型x环境相互作用及其稳定性措施阿拉比卡咖啡的主要重点:综述
Pub Date : 2021-08-01 DOI: 10.7176/alst/89-01
Lemi Beksisa
Understanding the implication of genotype x environment interaction (GEI) structure is an important consideration in plant breeding programs. The phenotype of an individual is determined by both the genotype and the environment, these two effects are not always additive which indicates that genotype x environment interactions (GEI) are present. The presence of genotype x environment interaction contributes to the unreliability 'of crop yield over a wide range of environments. The occurrence of large genotype x environment interaction makes the selection of superior genotypes difficult and inhibits progress from selection. It prevents the full understanding of genetic control of variability. In the absence of GEI, the superior genotype in one environment may be regarded as the superior genotype in all, whereas the presence of the GEI confirms particular genotypes being superior in particular environments. Therefore, it is important to understand the nature of genotype x environment interaction to make testing and selection of genotypes more efficient. A variety of statistical procedures are available to analyze the results of multi-environment trials. Additive Main Effects and Multiplicative Interaction (AMMI) model which combines the conventional analyses of variance for additive main effects with the principal components analysis (PCA) for the non-additive residuals and Genotypic Main effect plus genotype by environment interaction (GGE) biplot are two popular graphical analysis systems for multi-environment trials. Other method like the regression of genotype means on the environment means is also worthwhile.
了解基因型x环境相互作用(GEI)结构的含义是植物育种计划中的一个重要考虑因素。个体的表型是由基因型和环境共同决定的,这两种影响并不总是加性的,这表明基因型和环境相互作用(GEI)是存在的。基因型x环境相互作用的存在导致作物产量在各种环境下的不可靠性。基因型与环境的大相互作用使得优良基因型的选择变得困难,并抑制了选择的进展。它阻碍了对变异的遗传控制的充分理解。在没有GEI的情况下,一种环境中的优越基因型可能被认为是所有环境中的优越基因型,而GEI的存在证实了特定基因型在特定环境中的优越。因此,了解基因型与环境相互作用的本质对提高基因型的检测和选择效率具有重要意义。多种统计程序可用于分析多环境试验的结果。可加性主效应和乘性相互作用(AMMI)模型结合了传统的可加性主效应方差分析和非可加性残差的主成分分析(PCA),以及基因型主效应加基因型环境相互作用(GGE)双图,是两种常用的多环境试验图形分析系统。其他方法,如基因型手段对环境手段的回归,也是值得研究的。
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引用次数: 0
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