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THE PERFORMANCE OF SEVEN ELITE MAIZE ACCESSIONS FROM DIFFERENT AFRICAN ORIGINS UNDER RAIN-FED CONDITIONS IN SOUTH-EASTERN NIGERIA 在尼日利亚东南部的雨水灌溉条件下,来自不同非洲原产地的 7 个精英玉米品种的表现
Pub Date : 2024-07-19 DOI: 10.33003/jaat.2024.1001.07
Efretuei Arit, Udoh Lovina, Ekwere Okon
Maize is an important cereal crop, and millions of Africans rely on it as a major source of carbohydrates in their diet.  Grain yield from local maize varieties is generally low. Evaluation of different maize genotypes within a specific region is one way to identify and introduce varieties with high yield potential. This study assessed the yield and agronomic traits of 6 exotic maize accessions and a local variety to compare the performance of the exotic accessions with the local variety. The experiment was laid out as a randomized complete block design with four replications. The treatments included six exotic maize accessions, TZM386, TZM85, TZM16, TZM109, TZM392, and TZM1330, and a local variety ‘Uwep’ the result indicated that there were no significant differences in plant height and plant population at anthesis.  Grain yiel among all accessions was not greater than 0.5 t/ha in 2020 but ranged between 1-3 t/ha in 2021.  There were no significant differences in grain yield and components between the exotic and local accessions in 2021. In 2020, TZM 386 outperformed the local variety (uwep) in grain yield, ear weight, and number of ears/ha. Multiple linear regression showed a high dependence of grain yield on the growth parameter-plant height and the yield component ear no/ha in 2020 and 2021. This study has revealed differences in yield traits between the local and exotic accessions. The maize accession TZM 386 showed potential for higher grain yield and yield components and appears to be a promising candidate for further research.  
玉米是一种重要的谷类作物,数百万非洲人依靠它作为饮食中碳水化合物的主要来源。 当地玉米品种的谷物产量普遍较低。对特定地区的不同玉米基因型进行评估,是识别和引进高产潜力品种的一种方法。本研究评估了 6 个外来玉米品种和一个本地品种的产量和农艺性状,以比较外来品种和本地品种的表现。试验采用随机完全区组设计,四次重复。处理包括六个外来玉米品种:TZM386、TZM85、TZM16、TZM109、TZM392 和 TZM1330,以及一个本地品种 "Uwep"。 2020 年,所有品种的粮食产量均不超过 0.5 吨/公顷,但 2021 年的粮食产量在 1-3 吨/公顷之间。 2021 年,外来品种和本地品种的谷物产量和成分没有明显差异。2020 年,TZM 386 的谷物产量、穗重和穗数/公顷均优于本地品种(uwep)。多元线性回归结果表明,2020 年和 2021 年的谷物产量高度依赖于生长参数--株高和产量成分--穗数/公顷。这项研究揭示了本地品种和外来品种在产量性状上的差异。玉米品种 TZM 386 显示出了提高谷物产量和产量成分的潜力,似乎是一个有希望进一步研究的候选品种。
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引用次数: 0
IN SILICO STUDIES OF IDENTIFIED COMPOUNDS FROM ETHANOLIC EXTRACT OF CELOSIA TRIGYNA AGAINST NEMATODE (Meloidogyne incognita) 从三叶芹的乙醇提取物中识别出的化合物对线虫(Meloidogyne incognita)的蚕食研究
Pub Date : 2024-07-19 DOI: 10.33003/jaat.2023.0904.18
M. BelloOluwasesan, Hussaini Abdullahi, Dangani., Bello Jaafaru, Bello Oluwasesan
Plant-parasitic nematodes (PPNs) have been found to be a major cause of considerable economic burden on the horticultural crops industry. Celosia genus have been renown to purpose antimicrobial activity. This study tends to swing the antimicrobial activity of one species of this genus i.e. Celosia trigyna against root-knot nematodes employing molecular docking methods. The identification of compounds in the leaf extract with the potential to inhibit Meloidogyne incognita was carried out in silico. Liquid Chromatography Mass Spectrometry (LCMS) was employed for analysis of the ethanolic leaf extract of this plant, it revealed the presence of cis-9-tetradecanoic acid, vitexin-glucoside, 6”-O-deoxyhexoside, gallic acid, malic acid, sinapic acid, 3-feruloylquinic acid in the extract. Site-directed multiligand docking of the identified compounds was performed on protein 2MIF of Meloidogyne incognita and employing Bifenazate and Boscalid as positive controls. The binding affinity of 3-feruloylquinic (– 4.2 kcal/mol) was significantly higher than the positive control compounds i.e. Bifenazate and Boscalid (– 4.0 kcal/mol and – 3.9 kcal/mol). The interactions of this molecule with the amino acids of the protein showed that the mechanism of its inhibitory action is similar to that of the cocrystallized ligand. This result validates that the antimicrobial activity of the ethanolic extract of the leaves of C. trigyna could be employed against root-knot nematodes for sustainable agriculture.
植物寄生线虫(PPNs)已被发现是给园艺作物产业造成巨大经济负担的主要原因。天人菊属植物具有抗菌活性。本研究采用分子对接方法,对该属的一个物种(即三叶青)的根结线虫抗菌活性进行了研究。对叶提取物中具有抑制根结线虫潜力的化合物进行了硅学鉴定。采用液相色谱质谱法(LCMS)对该植物的乙醇叶提取物进行分析,发现提取物中含有顺式-9-十四烷酸、牡荆素-葡萄糖苷、6"-O-脱氧己苷、没食子酸、苹果酸、山奈酸、3-阿魏酰奎宁酸。采用联苯苄唑和苄嘧啶作为阳性对照,对已鉴定化合物与黑僵菌蛋白 2MIF 进行了多配体定点对接。3-feruloylquinic 的结合亲和力(- 4.2 kcal/mol)明显高于阳性对照化合物 Bifenazate 和 Boscalid(- 4.0 kcal/mol 和 - 3.9 kcal/mol)。该分子与蛋白质氨基酸的相互作用表明,其抑制作用机制与共晶体配体相似。这一结果证明,三尖杉叶乙醇提取物的抗菌活性可用于根结线虫的防治,从而实现农业的可持续发展。
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引用次数: 0
HAEMATOLOGICAL PARAMETERS AND ORGAN INDICES OF THE NILE TILAPIA (Oreochromis niloticus) FED WITH ROSELLE (Hibiscus Sabdariffa) SEED MEAL AT VARIOUS INCLUSION LEVELS 不同营养成分含量下的鲤鱼(Oreochromis niloticus)肉质参数和器官指标(ROSELLE (Hibiscus Sabdariffa) SEED MEALED WITH ROSELLE (Hibiscus Sabdariffa)
Pub Date : 2024-07-18 DOI: 10.33003/jaat.2023.0904.17
A. Yunusa, A. Dasuki, W. Buba, M. M. Onimisi, A. Yusuf
Oreochromis niloticus, we­ighing an average of 0.60g, were­ reared in a plastic aquarium measuring 60cm x 50cm x 30cm with a water holding capacity of 120 litres for a period of 28 wee­ks. To examine the impact of diffe­rent inclusion levels (0%, 25%, 50%, 75%, and 100%) of (Roselle) Hibiscus sabdariffa se­ed meal on the hae­matological properties of O. niloticus, five experimental diets were used in this study. At the end of the fee­ding trial, fish from each treatme­nt group were randomly selected for hae­matological analysis. The blood of each fish was collected using a syringe and needle and stored in ethylenediamine­ tetra acetic acid (EDTA) bottles. This was used to determine various parameters: packed cell volume (PCV), red blood cell (RBC) count, white blood cell (WBC) count, haemoglobin (Hb) level, mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC), and mean corpuscular volume (MCV). The obtained results indicated that the fish fed with a 50% inclusion level of Roselle had the highest packed cell volume of 40.00%. The control group with 0% inclusion level 38.50%, followed by levels of 25%, 75%and 100 % (37.50%; 34.00%; 32.00%) respectively. There­ were significant differe­nces (P < 0.05%) observed in all the­ PCV values. The RBC values e­xhibited a similar pattern with readings of 4.70 (50%), 4.35 (0%), 4.19 (25%), 3.37 (75%), and 3.10 (100%). The­ Hb values also followed a consistent tre­nd, measuring at 7.70, 7.15, 8.20, 7.43, and 7.20 for inclusion levels of 0%, 25%, 50%, 75%, and 100% re­spectively. Howeve­r, it is worth noting that lymphocytes and white blood cell counts we­re lower at the inclusion le­vel of 50% (81.00) when compared to the­ levels of 83.50 (0%),84.45 (25%), and 89.70 (100%). Based on the­se findings, it can be concluded that proce­ssed Hibiscus sabdariffa se­ed meal can effe­ctively replace fish me­al in practical diet for O.niloticus at 50% inclusion level without any detrimental e­ffects on the fish's haematological parame­ters.
在 60 厘米 x 50 厘米 x 30 厘米、容水量为 120 升的塑料水族箱中饲养黑线鲈,平均体重 0.60 克,为期 28 周。为了研究不同添加量(0%、25%、50%、75% 和 100%)的(洛神花)芙蓉种子粉对尼罗河鲶鱼血液学特性的影响,本研究使用了五种实验日粮。喂养试验结束后,从每个处理组中随机挑选鱼类进行血液学分析。使用注射器和针头采集每条鱼的血液,并储存在乙二胺四乙酸(EDTA)瓶中。这些血液用于测定各种参数:充盈细胞体积(PCV)、红细胞(RBC)计数、白细胞(WBC)计数、血红蛋白(Hb)水平、平均血红蛋白(MCH)、平均血红蛋白浓度(MCHC)和平均血容量(MCV)。结果表明,添加 50%洛神花素的鱼类包装细胞容积最高,达到 40.00%。添加量为 0% 的对照组为 38.50%,其次是添加量为 25%、75% 和 100% 的对照组(分别为 37.50%、34.00% 和 32.00%)。所有 PCV 值均有明显差异(P < 0.05%)。红细胞值也呈现出类似的模式,读数分别为 4.70(50%)、4.35(0%)、4.19(25%)、3.37(75%)和 3.10(100%)。血红蛋白值也呈现出一致的趋势,在 0%、25%、50%、75% 和 100% 的纳入水平下,血红蛋白值分别为 7.70、7.15、8.20、7.43 和 7.20。然而,值得注意的是,与 83.50(0%)、84.45(25%)和 89.70(100%)的水平相比,淋巴细胞和白细胞计数在 50%(81.00)的纳入水平较低。根据这些研究结果,可以得出结论,加工后的芙蓉籽粉可以有效地替代鱼粉,用于尼罗河鲶鱼的实际日粮中,添加量为 50%,不会对鱼类的血液学参数产生任何不利影响。
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引用次数: 0
PERCEIVED EFFECTS OF CLIMATE CHANGE ON AGRICULTURAL PRODUCTIVITY IN IGBO-ETITI LOCAL GOVERNMENT AREA OF ENUGU STATE, NIGERIA 气候变化对尼日利亚埃努古州伊博-埃蒂蒂地方政府地区农业生产率的预期影响
Pub Date : 2024-07-18 DOI: 10.33003/jaat.2024.1001.06
T. Akukwe, Iheoma, Mba, Chinedu Lilian, Ginikachi Ruth
Climate change has been adduced to negatively affect agricultural productivity in agrarian communities. This study examined the effects of climate change on agricultural productivity in agrarian communities of Igbo-Etiti Local Government Area of Enugu State, Nigeria. Data were collected through the use of mixed and complementary methods such as observation, questionnaire survey and key informant interviews. The data generated were analyzed using descriptive statistics. Results reveal that majority (54.4%) of the respondents were female with farming the primary source of livelihood for majority (56.5%).  Majority (59.1%) of the farmers were aged between 35 and 54 years, and majority (53%) had more than years farming experience. The results also revealed climate change as the major factor affecting agricultural productivity in the study area. The findings show that farmers in the study were highly vulnerable to the adverse effects of climate change largely because they depend on rain-fed agriculture. Agricultural productivity was found to have decreased due to the influence of climate change as manifested in rainfall decline, delayed onset of rain, increased temperature, dryness of soil and prolonged dry season. However, the reduced agricultural productivity had led to farmers engaging in other secondary occupation such as trading. Farmers empowerment through loans and grants, Climate Smart Agriculture, subsidies in the areas of improved climate change-resistant plants, among others were recommended to improve agricultural productivity, food security and cushion the effects of climate change, thereby enhancing resilience.
气候变化被认为会对农业社区的农业生产率产生负面影响。本研究探讨了气候变化对尼日利亚埃努古州伊格博-埃蒂蒂地方政府辖区农业社区农业生产率的影响。数据收集采用了混合和互补的方法,如观察、问卷调查和关键信息提供者访谈。所得数据采用描述性统计方法进行分析。结果显示,大部分受访者(54.4%)为女性,大部分受访者(56.5%)的主要生活来源为农业。 大多数(59.1%)农民的年龄在 35 至 54 岁之间,大多数(53%)农民有多年以上的务农经验。研究结果还显示,气候变化是影响研究地区农业生产力的主要因素。研究结果表明,研究地区的农民非常容易受到气候变化的不利影响,这主要是因为他们依赖雨水灌溉农业。研究发现,由于气候变化的影响,农业生产率有所下降,具体表现为降雨量减少、降雨开始时间推迟、气温升高、土壤干燥和旱季延长。然而,农业生产率的下降导致农民从事其他副业,如贸易。建议通过贷款和赠款、气候智能型农业、改良抗气候变化植物领域的补贴等方式增强农民的能力,以提高农业生产率和粮食安全,缓解气候变化的影响,从而增强复原力。
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引用次数: 0
EFFECTS OF PROCESSING METHODS ON QUALITY CHARACTERISTICS OF KILISHI JERKIES 加工方法对千石牛肉干质量特性的影响
Pub Date : 2024-03-23 DOI: 10.33003/jaat.2023.0904.09
V. O. Iyiola, N. Aladi
The effects of processing methods (sun drying and oven drying) on quality characteristics of kilishi like jerkies were compared. The beef samples were processed into kilishi by sun drying or oven drying and then analysed for proximate composition, microbiology and sensory qualities after 1st and 12th weeks of storage. The data generated except sensory scores were analysed in a 2x2 factorial arrangement using a completely randomized design (CRD). The results of proximate analysis showed significant effects of the processing methods and period of storage in all the parameters analysed. Although microorganisms such as Fungi, Salmonella, E-coli, Staphylococcus and total coliform were isolated from the treatments, kilishi that was produced through sun drying had higher values of isolated microbes than counterparts produced by oven drying. Sundried kilishi had higher scores in all the sensory parameters analysed than the oven dried kilishi. The study indicated that production of safer and more wholesome kilishi snacks can be achieved through the use of oven drying, nonetheless, the sensory quality characteristics of sundried kilishi had higher scores and were preferred to the oven dried kilishi. Therefore, recommendation is made to increase the ingredient composition of the oven dried kilishi in order to meet the sensory qualities required by the consumers
比较了各种加工方法(日晒和烘干)对牛肉干质量特性的影响。牛肉样品通过太阳晒干或烘箱烘干加工成牛肉干,然后在贮存第 1 周和第 12 周后分析其近似成分、微生物学和感官质量。除感官评分外,其他数据均采用完全随机设计(CRD)的 2x2 因式排列进行分析。近似物分析结果表明,加工方法和储存时间对所有分析参数都有显著影响。虽然从处理中分离出了真菌、沙门氏菌、大肠杆菌、葡萄球菌和总大肠菌群等微生物,但晒干的千层糕比烘干的千层糕分离出的微生物值更高。在所有感官参数分析中,晒干千层糕的得分均高于烘干千层糕。研究表明,使用烘箱烘干可以生产出更安全、更卫生的千层糕点,但日晒千层糕的感官质量特性得分更高,比烘箱烘干的千层糕更受欢迎。因此,建议增加烘干千层饼的配料成分,以满足消费者对感官质量的要求。
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引用次数: 0
EFFECTS OF DIETARY INCLUSION OF VARIED LEVELS OF BUTYRIC ACID AS ANTIBIOTIC ON THE PERFORMANCE OF TURKEY POULTS 日粮中添加不同含量的丁酸作为抗生素对火鸡生长性能的影响
Pub Date : 2024-03-23 DOI: 10.33003/jaat.2023.0904.08
C. Mbakwe, A. Agboola, B.R.O. Omidiwura
The effects of butyric acid supplemented diets on growth performance of turkey poults were examined in a 49-day experiment using one hundred and sixty (160) (one-day old) Nicholas turkey poults. The experimental design was a Completely Randomized Design. Poults were brooded for 7 days, after which they were allotted to 4 dietary treatments with 5 replicates of 8 birds per replicate. Treatment 1(T1) was the basal diet with no supplement while treatments 2 (T2), 3 (T3), and 4(T4) were supplemented with antibiotics, 0.2% butyric acid and 0.4% butyric acid respectively. Feed was offered ad-libitum. Final weight and weight gain of poults fed control, antibiotics and 0.2% butyric acid supplemented diets were similar but significantly (p<0.05) higher than birds fed 0.4% butyric acid diet. Significant higher feed intake was observed in birds fed control and antibiotics diets while the least was recorded in birds fed 0.4% butyric acid diet. It was observed that 0.2% butyric acid appears to be a viable alternative to antibiotics growth promoter in turkey diets without any detrimental effect on the productive performances.
在一项为期 49 天的实验中,使用 160 只(一天龄)尼古拉斯火鸡,研究了添加丁酸的日粮对火鸡生长性能的影响。实验设计为完全随机设计。小火鸡育雏 7 天后被分配到 4 个日粮处理中,每个处理有 5 个重复,每个重复有 8 只小火鸡。处理 1(T1)为基础日粮,不添加任何添加剂;处理 2(T2)、处理 3(T3)和处理 4(T4)分别添加抗生素、0.2% 丁酸和 0.4%丁酸。饲料为全价饲料。饲喂对照组、抗生素和添加 0.2%丁酸的日粮的家禽的最终体重和增重相似,但显著高于饲喂 0.4%丁酸日粮的家禽(p<0.05)。饲喂对照组和抗生素日粮的鸡采食量明显较高,而饲喂 0.4% 丁酸日粮的鸡采食量最低。据观察,在火鸡日粮中,0.2% 丁酸似乎是抗生素生长促进剂的一种可行替代品,不会对火鸡的生产性能产生任何不利影响。
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引用次数: 0
INFLUENCED OF SEED WEIGHT ON EARLY GROWTH OF Acacia senegal (Linn) Willd (Gum Arabic) SEEDLINGS 种子重量对阿拉伯胶幼苗早期生长的影响
Pub Date : 2024-03-19 DOI: 10.33003/jaat.2023.0904.06
V. Adesanmi, A. A. Ogunbela, D. S. Muritala, O. Ajayi, M. O. Apenah, G. O. Elumalero, A. Jibo, K. D. Salami
Seed weight has enormous influence on the germination rate and growth performance of many species which necessary is for productivity and sustainability. Study was carried out to examine the effects of seed weight on germination and early growth of Acacia senegal (Linn) Willd (Gum Arabic) seedlings. The work was conducted in the Forestry nursery of Department of Forestry and Wildlife, Federal University Dutse, Jigawa state. Complete Randomized Design (CRD) was employed with three (3) treatments of twenty replications (20) making sixty samplings. The seed weights used were classified into three groups: Heavy seeds (1g and above), Medium seeds (0.5-0.9 g) and Light seeds (0.1- 0.4g). Germination counts and early growth parameters were assessed. Data were subjected to Analysis of Variance (ANOVA) at 0.05 probability level and descriptive statistics such as bar chart was used. It is interesting to note that the study found that heavy seeds (1g) had an earlier germination rate and better early growth performance compared to intermediate-weight (0.5 - 0.9g) and light-weight (0.4 - 0.1g) seeds. The heavy seeds showed the best overall performance, according to the results. Heavy seeds showed the best performance. Therefore, heavy weight seeds were recommended for planting, plantation establishment and nursery studies.
种子重量对许多物种的萌芽率和生长性能有巨大影响,而萌芽率和生长性能是提高生产力和可持续性所必需的。本研究旨在考察种子重量对阿拉伯胶幼苗萌发和早期生长的影响。这项工作在吉加瓦州杜塞联邦大学林业和野生动物系的林业苗圃中进行。采用了完全随机设计(CRD),三(3)个处理,20 个重复,共 60 次取样。所用种子重量分为三组:重型种子(1 克及以上)、中型种子(0.5-0.9 克)和轻型种子(0.1-0.4 克)。对发芽率和早期生长参数进行了评估。对数据进行了概率为 0.05 的方差分析(ANOVA),并使用了条形图等描述性统计方法。值得注意的是,研究发现,与中等重量(0.5 - 0.9 克)和轻重量(0.4 - 0.1 克)的种子相比,重种子(1 克)的发芽率更高,早期生长表现更好。结果表明,重粒种子的总体表现最好。重粒种子表现最佳。因此,建议在种植、植树造林和苗圃研究中使用重量大的种子。
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引用次数: 0
PREVALENCE OF INDIGESTIBLE FOREIGN BODIES (IFBs) IN RUMINANTS SLAUGHTERED IN GOMBE METROPOLITAN ABATTOIR 在贡贝市镇拘留所被杀害的流亡者中可归化外国人体(IFB)的先例
Pub Date : 2024-03-19 DOI: 10.33003/jaat.2023.0904.07
Haruna Alkali, Yusuf Ahmad, Maaruf Bashir, Saidu Adamu, Ghude Musa
The study was conducted in Gombe Metropolitan abattoir to assess the prevalence of indigestible foreign bodies (IFBs) and to determine the association of prevalence with predisposing factors in slaughtered ruminants. The study was laid in a completely randomized design. Sampling of animals was carried out using systematic random sampling. The prevalence of indigestible foreign bodies was computed and analyzed using Chi Square (χ2) test. Results indicated that out of 1,157 animals examined, 538 (46.50 %) were found to be positive. The prevalence was found to be significantly higher in Sheep (39.54%) than in cattle (15.92) and goats (34.53%). The results further relvealed that the prevalence of foreign bodies in female is higher than male with 38.97% and 20.46% respectively. Among the different age groups, a significantly (p< 0.05) higher prevalence was recorded in older animals than in younger animals. The indigestible foreign bodies (IFBs) observed were polythene bags, ropes, sack threads, rag, Fruit seeds, solid mass and plastic with polythene having higher prevalence of 30.70%. The prevalence of indigestible foreign bodies in the study area is high and was influenced by several factors among which are specie, age and body condition score. The variation in IFB prevalence across species underscores the importance of species-specific management and prevention strategies.
这项研究在贡贝市屠宰场进行,目的是评估难以消化异物(IFB)的流行率,并确定流行率与屠宰反刍动物的易感因素之间的关系。研究采用完全随机设计。动物采样采用系统随机抽样法。采用Chi Square (χ2)检验法计算和分析了难以消化异物的发生率。结果表明,在 1,157 头接受检查的动物中,有 538 头(46.50 %)被发现呈阳性。绵羊(39.54%)的感染率明显高于牛(15.92%)和山羊(34.53%)。研究结果还显示,雌性动物的异物感染率高于雄性动物,分别为 38.97% 和 20.46%。在不同年龄组中,年长动物的异物发生率明显高于年轻动物(p< 0.05)。观察到的难以消化的异物包括聚乙烯袋、绳索、麻袋线、碎布、果实种子、固体块和塑料,其中聚乙烯的发病率较高,为 30.70%。研究区内难以消化异物的流行率很高,受多种因素的影响,其中包括品种、年龄和体况评分。不同物种的消化道异物流行率存在差异,这凸显了针对特定物种的管理和预防策略的重要性。
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引用次数: 0
SOURSOP (Annona muricata) LEAF MEAL FED TO Clarias gariepinus PARENT INFLUENCED THE GROWTH AND EARLY DEVELOPMENT OF THE F1 GONADS 喂食胭脂鱼叶片饲料影响 F1 生殖腺的生长和早期发育
Pub Date : 2024-03-19 DOI: 10.33003/jaat.2023.0904.03
I. J. Ochokwu, L. Onyia, Y. Hadiza
The study was carried out to determine the impact of Annona muricata on the growth of the F1 generations and the gonad development of C. gariepinus. 750 hatchlings of average initial weight (0.05g) and length (0.4cm) from the parent that consumed A. muricata were stocked in a 1.0x1.0x0.5m3 fiber ponds in a completely randomized design. The hatchlings were fed 0.2mm coppens as starter (endogenous) feed for two weeks and 0.3 to 0.5 for another four weeks. The hatchlings were weighed weekly to evaluate their growth in weight and length. The fingerlings were further restocked in an outdoor nursery pond 2.0x2.0x1.5m3 and reared for another three weeks for growth parameters, while the gonad development was evaluated at the tenth week. The result of the growth revealed that the hatchlings had continuous and exponential growth among the treatments; however, the fry that the parent consumed, A. muricata, recorded the highest growth and survival rate. While the gonad development of the hatchlings whose parents consumed A. muricata started at the eleventh week and the 0% inclusion started at 14th week. These revealed the potential of A. muricata in the diet of C. gariepinus for the sustainability of the aquaculture industry, the production of quality broodstock, improved growth, and gonad development. 
本研究旨在确定鼠尾草对加里潘鱼 F1 代生长和性腺发育的影响。以完全随机设计的方式,将 750 尾平均初始体重(0.05 克)和平均体长(0.4 厘米)的幼体放养在 1.0x1.0x0.5 立方米的纤维池塘中。孵出的幼体以 0.2 毫米的桡足类作为起始(内源)饲料喂养两周,然后以 0.3 至 0.5 毫米的桡足类作为起始(内源)饲料喂养四周。每周对幼体进行称重,以评估其体重和体长的增长情况。然后将幼体放养到 2.0x2.0x1.5m3 的室外育苗池中,再饲养三周以评估生长参数,并在第十周评估性腺发育情况。生长结果表明,各处理的幼体均呈指数式持续增长,但亲鱼(A. muricata)摄食的鱼苗的生长和存活率最高。亲鱼摄入水黄华鱼的幼体在第 11 周开始性腺发育,而摄入 0% 水黄华鱼的幼体在第 14 周开始性腺发育。这揭示了鼠李子(A. muricata)在加里鲈鱼饮食中的潜力,可促进水产养殖业的可持续发展、生产优质鱼苗、改善生长和性腺发育。
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引用次数: 0
EFFECT OF GLOBAL WARMING ON SUSTAINABLE LIVESTOCK PRODUCTION IN THE SUB-SAHARAN AFRICA 全球变暖对撒哈拉以南非洲可持续畜牧业生产的影响
Pub Date : 2024-03-19 DOI: 10.33003/jaat.2023.0903.22
S. Africa, M. A. Ayoola, T. R. Fayeye, O. A. Dada
The greenhouse gas emissions from Animal production related activities has turn out to be an important cause of global warming. This can be attributed to the continent-wide massive burdens arising from the switch in food consumption pattern. Anthropogenic activitiesrelated to livestock production contribute 37% of methane (CH4) emission, 9% of carbon dioxide (CO2) output and utilize 8% of the world water. An estimated aggregate of 7.1 billion tonnes of CO2 are generated by the feed and livestock industries. The effect of global warming is presently being experienced such as unstable rainfall pattern, drought, extended walk in search of pasture and water, coupled with significant impact on livestock productivity (rate of weight gainand milk production potentials).The potential of Sub-Saharan Africa to achieve sustainable animal production is being threatened by global warming, it is. therefore necessary to leverage on the use of livestock breed that combine the heat tolerance of the local stock with the high milk yield of the exotic breed (crossbreeding) to produce an improved breed of livestock. Ameliorative strategies such as strategic supplementation of diets, matching genetics to specific systems and management of manure with potential to improve productivity of livestock should be included into livestock production systems in the Sub-Sahara Africa. The use of Geographic Information System (GIS) techniques will also assist to acquire ideal results on susceptibility of smallholder farmers. Finally, there is the need for shift in policy to promote the livelihood of indigenous livestock farmers under favourable environmental conditions.
动物生产相关活动排放的温室气体已成为全球变暖的重要原因。这可归因于食品消费模式的转变给整个大陆带来的巨大负担。与畜牧生产相关的人为活动排放了 37% 的甲烷 (CH4)、9% 的二氧化碳 (CO2),并消耗了全球 8% 的水资源。据估计,饲料和畜牧业产生的二氧化碳总量达 71 亿吨。撒哈拉以南非洲地区实现可持续畜牧业生产的潜力正受到全球变暖的威胁,因此有必要充分利用牲畜品种,将本地牲畜的耐热性与外来牲畜的高产奶性结合起来(杂交),培育出改良牲畜品种。撒哈拉以南非洲地区的畜牧业生产系统中应包括改善战略,如战略性地补充日粮、使遗传学与特定系统相匹配,以及对粪便进行管理,以提高牲畜的生产率。地理信息系统(GIS)技术的使用也将有助于获得有关小农易感性的理想结果。最后,有必要改变政策,以促进当地畜牧业农民在有利环境条件下的生计。
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FUDMA Journal of Agriculture and Agricultural Technology
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