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Effects of Dietary Incorporation of Neem (Azadirachta indica), Moringa (Moringa oleifera), and Jute (Corchorus olitorius) Leaf Powder on Production Performance and Blood Indices of Broiler Chickens as a Substitute of Antibiotic 膳食中添加印度楝(Azadirachta indica)、辣木(Moringa oleifera)和黄麻(Corchorus olitorius)叶粉替代抗生素对肉鸡生产性能和血液指标的影响
Pub Date : 2024-04-18 DOI: 10.24018/ejfood.2024.6.2.416
Rabiul Islam, M. A. H. Beg, M. Begum, M. Z. U. Rubel, Mst. Mayeeda Parvin
The study was planned to determine the effects of dietary incorporation of Neem (Azadirachta indica), Moringa (Moringa oleifera), and Jute (Corchorus olitorius) leaf powder on production performance, carcass traits, and blood indices of broiler chickens as a substitute for the antibiotic. A total of 200-day-old Cobb 500 broiler chicks were divided randomly into 5 experimental groups. Whereas groups T1, T2, T3, and T4 were offered basal feed supplemented with 2% Neem Leaf Powder (NLP), 2% Moringa Leaf Powder (MLP), 2% Jute Leaf Powder (JLP), and antibiotics, respectively. In this research, the total feed consumption of birds was significantly (P < 0.05) lower in the T1 and T2 group than in the T3 and T4 group. Final live weight was significantly (P < 0.05) higher in 2% MLP treated group T2 followed by T1, T3, and T0 group. Significantly (P < 0.05) better feed conversion ratio (FCR) was found in the T2 group compared to T0, T3, and T4 groups. There found no significant (P > 0.05) effect of treatments on the survivability percentage of birds. All the treatment groups showed an insignificant (P > 0.05) effect on dressing percentage and organs (liver, heart, and gizzard) weight of broiler chicken. Weight of immune organs (spleen and bursa) and blood parameters (concentration of hemoglobin, glucose, and cholesterol) were not influenced (P > 0.05) by dietary addition. Birds fed the lower amount of feed, higher body weight, and improved FCR were found in the 2% MLP treated group. In overall aspects, the effectiveness of 2% MLP addition was better than 2% NLP and 2% JLP as an antibiotic alternative.
本研究旨在确定肉鸡日粮中添加印度楝(Azadirachta indica)、辣木(Moringa oleifera)和黄麻(Corchorus olitorius)叶粉作为抗生素替代品对其生产性能、胴体特征和血液指标的影响。将 200 日龄的 Cobb 500 肉用仔鸡随机分为 5 个实验组。其中,T1、T2、T3 和 T4 组分别在基础饲料中添加 2% 印楝叶粉 (NLP)、2% 辣木叶粉 (MLP)、2% 黄麻叶粉 (JLP) 和抗生素;T1、T2、T3 和 T4 组分别在基础饲料中添加 2% 印楝叶粉 (NLP)、2% 辣木叶粉 (MLP)、2% 黄麻叶粉 (JLP) 和抗生素。在这项研究中,T1 和 T2 组的鸟类总饲料消耗量明显低于 T3 和 T4 组(P < 0.05)。经 2% MLP 处理的 T2 组最终活重明显高于 T1、T3 和 T0 组(P < 0.05)。与 T0、T3 和 T4 组相比,T2 组的饲料转化率(FCR)明显更高(P < 0.05)。处理对家禽存活率的影响不明显(P > 0.05)。所有处理组对肉鸡换羽率和器官(肝脏、心脏和胗)重量的影响均不显著(P > 0.05)。免疫器官(脾脏和法氏囊)的重量和血液参数(血红蛋白、葡萄糖和胆固醇的浓度)不受日粮添加量的影响(P > 0.05)。经 2% MLP 处理的组别中,喂食饲料量较少的鸟类体重较高,FCR 也有所改善。总体而言,添加 2% MLP 作为抗生素替代品的效果优于 2% NLP 和 2% JLP。
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引用次数: 0
Breadfruit (Artocarpus altilis) Pulp Flour as a Non-Conventional Filler in Comminuted Pork: Effect on Physicochemical, Sensory Attributes and Cost of Meatloaves 面包果(阿尔托卡普斯)果肉粉作为非常规填料在碎猪肉中的应用:对肉饼理化、感官属性和成本的影响
Pub Date : 2024-04-16 DOI: 10.24018/ejfood.2024.6.2.778
Obed Adjei, P. Sasu, Jessica Kukua Baidoo, B. Adjei-Mensah, Gifty Amoakoah Bredu, Theophilus Owusu Ansah, V. ATTOH-KOTOKU, Francis Appiah, Armstrong Donkoh
This study explored the use of breadfruit (Artocarpus altilis) pulp flour (BFPF) as a filler in meatloaves, partially substituting comminuted pork. Four experimental treatments were formulated: T1 (control) with 0% BFPF, T2 with 5% BFPF, T3 with 10% BFPF, and T4 with 15% BFPF, baking them at 175 °C for 55 minutes. Data on chemical composition, cooking yield, pH, and sensory evaluation were collected. Increasing BFPF levels reduced protein and fat but increased moisture and ash in the meatloaves. Cooking yield significantly improved (p < 0.001), ranging from 751.7 g/kg DM (T1) to 835.3 g/kg DM (T5). The pH remained stable (p = 0.350), and taste preferences showed no significant differences (p = 0.283). The cost of meatloaf decreased linearly with higher BFPF inclusion. Replacing comminuted pork with up to 15% BFPF in meatloaf can improve cooking yield and reduce fat and cost without compromising on pH and sensory attributes.
本研究探索了面包果(阿尔托卡普树)果肉粉(BFPF)作为肉卷填充物的使用,部分替代了粉碎的猪肉。共制定了四种实验处理方法:T1(对照组)添加 0% BFPF,T2 添加 5% BFPF,T3 添加 10% BFPF,T4 添加 15% BFPF,在 175 °C 下烘烤 55 分钟。收集的数据包括化学成分、蒸煮率、pH 值和感官评价。增加全氟辛基磺酰氟含量会降低肉饼中的蛋白质和脂肪含量,但会增加水分和灰分。烹饪产量明显提高(p < 0.001),从 751.7 克/千克 DM(T1)提高到 835.3 克/千克 DM(T5)。pH 值保持稳定(p = 0.350),口味偏好无明显差异(p = 0.283)。肉饼的成本随着 BFPF 含量的增加而呈线性下降。在肉卷中用最高 15%的 BFPF 替代粉碎猪肉可提高烹饪产量、减少脂肪和降低成本,同时不会影响 pH 值和感官特性。
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引用次数: 0
Effect of Pickling Methods on the Quality and Flavor of Umeboshi 腌制方法对梅子质量和风味的影响
Pub Date : 2024-04-02 DOI: 10.24018/ejfood.2024.6.2.771
Kana Fukuma, Hiroko Seki
Umeboshi is made by pickling plums in salt. The quality of umeboshi varies depending on the pickling method and additives used. In the present study, we compared the quality of plums pickled in salt, brine, and Ca-supplemented brine. Quality determinants of the pickled plums included hardness, moisture content, pH, Brix value, fruit color, and malic acid, citric acid, and salt concentrations. We also performed a microbiological evaluation of the umeboshi. Additionally, using a questionnaire, we surveyed consumer preferences for umeboshi pickled using different additives. Salt-pickled umeboshi had a high pH and low citric acid content, resulting in a mild flavor, whereas umeboshi pickled in brine had a high malic acid content. After soaking in various salts, the acidity of pickled plums increased. Moreover, umeboshi pickled in Ca-supplemented brine exhibited high L-and a-values. Our results suggest that malic acid contributes to the flavor and appeal of umeboshi and that Ca supplementation in the brine results in bright-colored umeboshi.
梅子是用盐腌制而成的。梅子的质量因腌制方法和使用的添加剂而异。在本研究中,我们比较了用盐、盐水和添加 Ca 的盐水腌制梅子的质量。决定腌制李子质量的因素包括硬度、水分含量、pH 值、Brix 值、果实颜色以及苹果酸、柠檬酸和盐的浓度。我们还对乌梅进行了微生物评估。此外,我们还通过问卷调查消费者对使用不同添加剂腌制的乌梅的偏好。用盐腌制的乌梅 pH 值高、柠檬酸含量低,因此味道清淡,而用盐水腌制的乌梅苹果酸含量高。在各种盐中浸泡后,腌制梅子的酸度增加。此外,用添加 Ca 的盐水腌制的乌梅显示出较高的 L 值和 a 值。我们的研究结果表明,苹果酸有助于提升梅子的风味和吸引力,而在盐水中添加钙则可使梅子颜色鲜艳。
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引用次数: 0
Analogous Charging Effect of Surfactant-Pesticide Spray Jet on Droplet Characteristics and Deposition on Hydrophobic Leaf Surfaces 表面活性剂-杀虫剂喷雾射流对液滴特性和在疏水性叶片表面沉积的类比充电效应
Pub Date : 2024-02-17 DOI: 10.24018/ejfood.2024.6.1.757
S. Appah, Eric Amoah Asante, Christopher Amigangre Ayambire
An induction charging principle had been applied to enhance spray droplet characteristics and quantity deposition on hydrophobic abaxial-adaxial leaf surfaces from pesticide EC Glyphosate [C3H8NO5P] and surfactant Silwet L-77 [C13H34O4Si3] formulations. A nozzle cap containing two electrodes (spacing at 9 mm apart) was used to superpose charges to spray droplets under applied voltages of 2–12 kV in an electric field (E) of 8.9 × 105 V/m. From a tee-jet flat fan (TP11004VS) nozzle tip fitted into the electrode cap and positioned at 60 cm high above targeted Brassica campestris leave surfaces, the spray droplets were directed onto the leaves at a liquid flow pressure of 4 bar and travelling speed of 2 m/s. The measurements were done using Keithsley picoammeter to quantify spray chargeability (CMR), droplet sizes by lesser particle size analyzer (LPSA) and deposition on leaf surfaces by high-speed camera. In effect, droplet sizes of EC, L-77 and EC + L-77 decreased with an increasing applied voltage. The CMR of L-77 was lower than EC and highest for EC + L-77 composite solution. Based on Image analysis of droplets density per leaf area, maximum exposure of adaxial leaf surfaces intercepted many charged spray droplets than abaxial surfaces. As regressed, the quantity of charged spray deposition from EC + L-77 formulation was highest at both adaxial (approx. 27.44 Qd/cm2) and abaxial (approx. 5.57 Qd/cm2) hydrophobic leaf surfaces than EC of 26.12: 3.19 Qd/cm2 and L-77 of 24.80: 2.53 Qd/cm2, respectively. Also, contact angle, Theta E, of charged spray droplets was smaller than Theta C on adaxial than abaxial leave surfaces, a phenomenon attributed to high chemo-electrical properties of formulations that aided the direct flight, coiling and deposition of droplets in order of EC > EC + L-77 > L-77. Generally, there was no observable droplet rebound; hence, surfactant-pesticide composite spraying is considered suitable for electrostatic application in plant protection technology. Therefore, for effective application, charged droplets from glyphosate EC in silwet L-77 solution should be recommended, as it provides optimum droplet sizes, chargeability, contact angle and deposition on hydrophobic leave surfaces.
应用感应充电原理提高了农药草甘膦[C3H8NO5P]和表面活性剂Silwet L-77 [C13H34O4Si3]制剂在疏水性叶片背面的喷雾液滴特性和沉积量。在 8.9 × 105 V/m 的电场 (E) 中,使用包含两个电极(间距为 9 mm)的喷嘴帽在 2-12 kV 的外加电压下对喷雾液滴叠加电荷。喷雾液滴从安装在电极帽上的三叶扁平风扇(TP11004VS)喷嘴喷出,喷嘴位于目标甘蓝叶片表面上方 60 厘米处,液流压力为 4 巴,流速为 2 米/秒。测量使用 Keithsley 微微安培计量化喷雾电荷率(CMR),使用较小粒度分析仪(LPSA)量化液滴大小,并使用高速照相机测量叶片表面的沉积情况。实际上,随着施加电压的增加,EC、L-77 和 EC + L-77 的液滴尺寸都有所减小。L-77 的 CMR 低于 EC,而 EC + L-77 复合溶液的 CMR 最高。根据每叶面积液滴密度的图像分析,叶片正面最大暴露量比背面截获的带电喷雾液滴多。回归结果表明,EC + L-77 配方在疏水性叶片正面(约 27.44 Qd/cm2)和背面(约 5.57 Qd/cm2)的带电喷雾沉积量最高,分别为 EC 26.12:3.19 Qd/cm2,L-77 24.80:2.53 Qd/cm2。此外,带电喷雾液滴在叶片正面的接触角 Theta E 小于叶片背面的 Theta C,这种现象归因于制剂的高化学电特性,有助于液滴的直接飞行、卷绕和沉积,其顺序为 EC > EC + L-77 > L-77。一般来说,没有观察到液滴反弹现象;因此,表面活性剂-杀虫剂复合喷洒被认为适用于植物保护技术中的静电应用。因此,为了有效施药,应推荐使用硅湿 L-77 溶液中的草甘膦乳油带电液滴,因为它能提供最佳的液滴大小、带电性、接触角和在疏水性叶片表面的沉积。
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引用次数: 0
Organic Agriculture in Tunisia, Africa 非洲突尼斯的有机农业
Pub Date : 2024-02-16 DOI: 10.24018/ejfood.2024.6.1.774
John Paull
Tunisia reports 279,389 hectares of certified organic agriculture, accounting for 2.87% of the country’s farmland. Most of Tunisia’s organic production is exported. Organic olive oil accounts for 74% of organic exports, and organic dates for 22%. In 2021, Tunisia bid and won the right to host the Organic World Congress (OWC) 2024. After almost half a century of OWCs, the prospective OWS Tunis 2024 was to be the first such event to be held in Africa. It would be an opportunity to showcase Tunisian and African organics, and to provide a welcome impetus to grow the organics sectors of the country and the continent. In 2023, OWS Tunis 2024 was cancelled in the wake of the Covid-19 pandemic, the loss-making OWC Rennes 2021, and changed economic, political and social circumstances. The African continent is an under-performer in organics; 15 countries report no organics, 28 countries report less than 1% organics and only a single country reports greater than 5% (viz. São Tomé and Principe, 21.2%). Tunisia is an organics leader in Africa. The present paper tracks the stop-start growth of the organics sector of Tunisia over the past two decades.
突尼斯报告的有机农业认证面积为 279 389 公顷,占全国耕地面积的 2.87%。突尼斯的大部分有机产品用于出口。有机橄榄油占有机出口的 74%,有机椰枣占 22%。2021 年,突尼斯申办并赢得了 2024 年世界有机大会(OWC)的主办权。在举办了近半个世纪的世界有机大会之后,2024 年突尼斯世界有机大会将是首次在非洲举办的此类活动。这将是一次展示突尼斯和非洲有机产品的机会,为突尼斯和非洲大陆有机产品行业的发展提供可喜的动力。2023 年,由于科维德-19 大流行病、2021 年雷恩有机世界大会的亏损以及经济、政治和社会环境的变化,2024 年突尼斯有机世界大会被取消。非洲大陆在有机产品方面表现不佳;15 个国家报告称没有有机产品,28 个国家报告称有机产品占比不足 1%,只有一个国家报告称有机产品占比超过 5%(即圣多美和普林西比,21.2%)。突尼斯是非洲有机食品的领头羊。本文件追踪了突尼斯有机食品行业在过去二十年中停滞不前的发展历程。
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引用次数: 0
Organic Agriculture in Europe: EU Sets Goal of Growing Organic Farmland from 10% to 25% by 2030 欧洲的有机农业:欧盟设定到 2030 年将有机农田从 10%增至 25%的目标
Pub Date : 2024-02-13 DOI: 10.24018/ejfood.2024.6.1.769
John Paull
Historically, Europe has been the locus of key developments in the founding and growth of organic agriculture. A century ago, in 1924, the Austrian New Age philosopher Dr. Rudolf Steiner called for an agriculture differentiated from the prevailing direction of agriculture and one reliant on natural biological processes rather than synthetic chemicals. The European Union (EU) has set the goal to be of 25% organic by 2030. Organic agriculture presently accounts for 9.6% of EU agriculture (cf. the world figure is 1.6%). For the past two decades, the tally of EU organic agriculture hectares has grown at 6.7% pa to reach 15,639,063 ha (cf. the world total of 76,403,777 ha). At this historic rate of growth (of 6.7% pa), organics will account for 17.5% by 2030 (c. 28.2 m ha), which is well short of the goal. To reach 25% by 2030, the growth rate needs to be ramped up to 10.7% pa growth (and reach a total of 40.6 m ha). About half (n = 15) of the 31 countries committed to the 25% goal, comprising the EU, EEA, and EFTA, have more than 10% organic agriculture. That offers a good foundation on which to build to the goal. The other half (n = 16) each have less than 10% organic agriculture; they offer opportunities for substantial uptake of organics. The EU has a ‘Farm to Fork’ strategy (F2F) with an ‘Action Plan’ comprising three ‘Axes’ and 54 ‘Actions’ to achieve the 25% organic goal by 2030; however, milestones and waypoints are lacking. The EU goal is bold, but not as bold as the 100% organic goals of Sikkim, which has achieved its 100% goal, and Bhutan, which has not and is stalled at 1% organic.
从历史上看,欧洲一直是有机农业创立和发展的关键地点。一个世纪前,即 1924 年,奥地利新时代哲学家鲁道夫-斯坦纳博士(Dr. Rudolf Steiner)呼吁建立一种有别于当前农业发展方向的农业,一种依赖于自然生物过程而非合成化学品的农业。欧盟(EU)设定了到 2030 年有机农业占比达到 25% 的目标。有机农业目前占欧盟农业的 9.6%(世界数字为 1.6%)。在过去二十年里,欧盟有机农业公顷数每年增长 6.7%,达到 15,639,063 公顷(世界总量为 76,403,777 公顷)。按照这一历史增长率(每年 6.7%),到 2030 年,有机农业将占 17.5%(约 2820 万公顷),这与目标相差甚远。要在 2030 年达到 25%,增长率需要提高到每年 10.7%(总面积达到 4 060 万公顷)。在承诺实现 25% 目标的 31 个国家中,约有一半(n = 15)(包括欧盟、欧洲经济区和欧洲自由贸易联盟)的有机农业比例超过 10%。这为实现目标奠定了良好的基础。另一半国家(n = 16)的有机农业比例均低于 10%;这些国家为有机产品的大量使用提供了机会。欧盟制定了 "从农场到餐桌 "战略 (F2F),其 "行动计划 "包括三个 "轴心 "和 54 项 "行动",旨在到 2030 年实现 25% 的有机农业目标;但是,缺乏里程碑和路标。欧盟的目标是大胆的,但不如锡金和不丹大胆,锡金已实现 100%有机目标,不丹尚未实现,有机比例仅为 1%。
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引用次数: 0
Performance Evaluation of Four Novel Cassava (Manihot esculenta Crantz) Accessions to Different Fertilizer Types in Awka, Anambra State, Nigeria 尼日利亚阿南布拉州阿卡市四种木薯(Manihot esculenta Crantz)新品种对不同肥料类型的表现评估
Pub Date : 2024-02-05 DOI: 10.24018/ejfood.2024.6.1.595
Chukwunenye Christian Iwuagwu, Agatha Chioma Nwankwegu, Basil Okwudili Ikenwa, D. E. Iheaturu, O. A. Apalowo, M. E. Ejiofor, D. C. Iwu
The investigation was carried out on the effects of fertilizer and cassava variety on agronomic characteristics, yield, and disease incidence of four improved cassava accessions. The experiment was carried out at the Teaching and Research farm of Crop Science and Horticulture, Nnamdi Azikiwe University Awka, Anambra State. It was a 4 × 3 factorial experiment with treatments laid out in a Randomized Complete Block Design (RCBD) with three replications. Fertilizer types were NPK 15:15:15 at a rate of 400 kg/ha, poultry manure (PM) at a rate of 50 tons/ha and no application as control. The cassava accessions were TMS539, TMS092, TMS371 and TMS412, obtained from the International Institute for Tropical Agriculture (IITA) in Ibadan, Nigeria. Stems were cut to about 15cm and planted at a spacing of 0.5m apart. The parameters measured were the number of root tubers, total number of rot tubers, weight of tuber (kg), stem girth (cm), node per stand, branching interval, internode spacing (cm), number of branching, plant height (cm), age at branching, disease incidence. Normal agronomic practices were carried out. Results showed that all varieties responded to the application of inorganic and organic fertilizers. Cassava plants that did not receive any fertilizer application (no application) gave the highest number of root tubers (29.7) from TMS412, and the least was from TMS092. The result also showed that there was no significant difference in the effects of fertilizer type on diseases. Results also showed that there was a significant interactive effect of cassava varieties and fertilizer type on branching interval (7.009), Internode spacing (0.6195), number of branching (0.2822), and plant height (17.02) at six months after planting. From the investigation, it could be recommended that for farmers to obtain greater yields with little or no fertilizer application, these cassava accessions should be used, which are characterized by high yield and resistance to disease and pests, as shown from this research.
本研究调查了肥料和木薯品种对四个改良木薯品种的农艺特性、产量和病害发生率的影响。实验在阿南布拉州阿卡市纳姆迪-阿齐基韦大学作物科学与园艺教研农场进行。这是一项 4 × 3 的因子试验,处理采用随机完全区组设计(RCBD),有三次重复。肥料类型为 NPK 15:15:15(每公顷 400 公斤)、家禽粪便(PM)(每公顷 50 吨)和不施用肥料作为对照。木薯品种为 TMS539、TMS092、TMS371 和 TMS412,来自尼日利亚伊巴丹的国际热带农业研究所(IITA)。茎被切成约 15 厘米长,以 0.5 米的间距种植。测量的参数包括块根数、腐烂块茎总数、块茎重量(千克)、茎围(厘米)、每立节数、分枝间隔、节间间距(厘米)、分枝数、株高(厘米)、分枝年龄、病害发生率。此外,还采用了正常的农艺措施。结果表明,所有品种对施用无机肥料和有机肥料都有反应。未施用任何肥料(不施肥)的木薯植株块根数量最多(29.7 个),来自 TMS412,最少的来自 TMS092。结果还显示,肥料类型对病害的影响没有显著差异。结果还显示,木薯品种和肥料类型对种植后 6 个月的分枝间隔(7.009)、节间距(0.6195)、分枝数(0.2822)和株高(17.02)有显著的交互影响。调查结果表明,要想在少施肥或不施肥的情况下获得更高的产量,建议农民使用这些木薯品种,因为这些品种具有高产和抗病虫害的特点。
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引用次数: 0
Performance Evaluation of Four Novel Cassava (Manihot esculenta Crantz) Accessions to Different Fertilizer Types in Awka, Anambra State, Nigeria 尼日利亚阿南布拉州阿卡市四种木薯(Manihot esculenta Crantz)新品种对不同肥料类型的表现评估
Pub Date : 2024-02-05 DOI: 10.24018/ejfood.2024.6.1.595
Chukwunenye Christian Iwuagwu, Agatha Chioma Nwankwegu, Basil Okwudili Ikenwa, D. E. Iheaturu, O. A. Apalowo, M. E. Ejiofor, D. C. Iwu
The investigation was carried out on the effects of fertilizer and cassava variety on agronomic characteristics, yield, and disease incidence of four improved cassava accessions. The experiment was carried out at the Teaching and Research farm of Crop Science and Horticulture, Nnamdi Azikiwe University Awka, Anambra State. It was a 4 × 3 factorial experiment with treatments laid out in a Randomized Complete Block Design (RCBD) with three replications. Fertilizer types were NPK 15:15:15 at a rate of 400 kg/ha, poultry manure (PM) at a rate of 50 tons/ha and no application as control. The cassava accessions were TMS539, TMS092, TMS371 and TMS412, obtained from the International Institute for Tropical Agriculture (IITA) in Ibadan, Nigeria. Stems were cut to about 15cm and planted at a spacing of 0.5m apart. The parameters measured were the number of root tubers, total number of rot tubers, weight of tuber (kg), stem girth (cm), node per stand, branching interval, internode spacing (cm), number of branching, plant height (cm), age at branching, disease incidence. Normal agronomic practices were carried out. Results showed that all varieties responded to the application of inorganic and organic fertilizers. Cassava plants that did not receive any fertilizer application (no application) gave the highest number of root tubers (29.7) from TMS412, and the least was from TMS092. The result also showed that there was no significant difference in the effects of fertilizer type on diseases. Results also showed that there was a significant interactive effect of cassava varieties and fertilizer type on branching interval (7.009), Internode spacing (0.6195), number of branching (0.2822), and plant height (17.02) at six months after planting. From the investigation, it could be recommended that for farmers to obtain greater yields with little or no fertilizer application, these cassava accessions should be used, which are characterized by high yield and resistance to disease and pests, as shown from this research.
本研究调查了肥料和木薯品种对四个改良木薯品种的农艺特性、产量和病害发生率的影响。实验在阿南布拉州阿卡市纳姆迪-阿齐基韦大学作物科学与园艺教研农场进行。这是一项 4 × 3 的因子试验,处理采用随机完全区组设计(RCBD),有三次重复。肥料类型为 NPK 15:15:15(每公顷 400 公斤)、家禽粪便(PM)(每公顷 50 吨)和不施用肥料作为对照。木薯品种为 TMS539、TMS092、TMS371 和 TMS412,来自尼日利亚伊巴丹的国际热带农业研究所(IITA)。茎被切成约 15 厘米长,以 0.5 米的间距种植。测量的参数包括块根数、腐烂块茎总数、块茎重量(千克)、茎围(厘米)、每立节数、分枝间隔、节间间距(厘米)、分枝数、株高(厘米)、分枝年龄、病害发生率。此外,还采用了正常的农艺措施。结果表明,所有品种对施用无机肥料和有机肥料都有反应。未施用任何肥料(不施肥)的木薯植株块根数量最多(29.7 个),来自 TMS412,最少的来自 TMS092。结果还显示,肥料类型对病害的影响没有显著差异。结果还显示,木薯品种和肥料类型对种植后 6 个月的分枝间隔(7.009)、节间距(0.6195)、分枝数(0.2822)和株高(17.02)有显著的交互影响。调查结果表明,要想在少施肥或不施肥的情况下获得更高的产量,建议农民使用这些木薯品种,因为这些品种具有高产和抗病虫害的特点。
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引用次数: 0
Assessment and Mitigation of Bacterial and Fungal Contamination in Refrigerator Waterlines 评估和减轻冰箱水管中的细菌和真菌污染
Pub Date : 2024-01-23 DOI: 10.24018/ejfood.2024.6.1.747
Paul Dawson, Julie Northcutt, A. Buyukyavuz, Belinda Cochran, Thomas McCollough
Three experiments were conducted on the recovery of microorganisms associated with refrigerator water lines. In the first experiment, between 2 and 3 logs CFU/ml were recovered from 100 different refrigerators’ residential water and ice lines. In a second experiment, plastic tubing segments cut from commercial refrigerator waterline systems were inoculated with the bacterium Pseudomonas aeruginosa and a fungal strain of Aspergillus flavus. Either 0.02% peracetic acid (PAA) exposure for 2 min or 0.03% PAA exposure for 1 min resulted in no recoverable bacteria cells, however, 0.25% PAA contact for 2 min was needed to eliminate detection of fungal cells. The third experiment tested sanitation of a water system inoculated with a mixed culture of P. aeruginosa and A flavus with a water filter cartridge filled with 3.5% PAA. The 3.5% concentration was determined using a computer simulation for mixing during a cleaning cycle that would yield a minimum concentration of at least 0.25% throughout the water system. After loading a water filter cartridge containing 3.5% PAA, allowing water to flow into the system for 15 s, and then allowing the system to sit for 5 min, no viable P. aeruginosa or A flavus cells were recovered up to 10 days after treatment.
对冰箱水管相关微生物的回收进行了三次实验。在第一项实验中,从 100 台不同冰箱的家用水管和冰管中回收了 2 至 3 logs CFU/ml。在第二个实验中,从商用冰箱水管系统中切下的塑料管段接种了铜绿假单胞菌和黄曲霉的真菌菌株。将 0.02% 的过乙酸 (PAA) 接触 2 分钟或将 0.03% 的过乙酸接触 1 分钟后,都无法回收细菌细胞,但需要将 0.25% 的过乙酸接触 2 分钟才能检测出真菌细胞。第三个实验测试了用装有 3.5% PAA 的滤水器滤芯对接种了铜绿假单胞菌和黄曲霉菌混合培养物的水系统进行消毒。3.5% 的浓度是通过计算机模拟确定的,以便在清洗周期中进行混合,使整个水系统中的最低浓度至少达到 0.25%。在装入含有 3.5% PAA 的滤水器滤芯后,让水流进系统 15 秒钟,然后让系统静置 5 分钟,处理后 10 天内未发现有存活的铜绿微囊藻或黄曲霉菌细胞。
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引用次数: 0
Endogenous Enzyme Activities, Digestibility of Nutrients and Digestive Physiology as Affected by High Inclusion of Cottonseed Meal in Broiler Chicken Diets 肉鸡日粮中大量添加棉籽粕对内源性酶活性、营养物质消化率和消化生理的影响
Pub Date : 2024-01-17 DOI: 10.24018/ejfood.2024.6.1.752
M. E. Abdallh, E. Chang’a, A. Omede, E. U. Ahiwe, Mohamed Al-Qahtani, D. Cadogan, P. Iji
A 3 × 3 factorial study examined the performance, endogenous enzyme activities and apparent ileal digestibility of nutrients, including energy, protein, starch, dry matter, amino acids and minerals of birds fed diets containing graded levels of cottonseed meal (CSM) with or without microbial enzymes. Nine iso-caloric and iso-nitrogenous diets were formulated mainly from wheat/sorghum/soybean meal. Three levels of CSM none (0%), low (5%, 10%, and 15%) or high (6%, 12%, and 18%) in the starter, grower, and finisher diets, respectively, were included. The diets were supplemented with three levels of a composite xylanase and beta-glucanase product at 0, 100 or 150 mg/kg diet. Each of the nine dietary treatments was randomly assigned to 6 replicates, with 10 birds per replicate. Feed intake (FI) and weight gain (WG) were recorded on day 10, 24 and 35, and feed conversion ratio (FCR) was obtained from the data, while enzyme activities and nutrient digestibility were measured on samples collected on day 10 and 24, and day 24 only, respectively. Feed intake up to day 35 decreased (P < 0.05) significantly with increasing enzyme supplementation. On the CSM-containing diets, enzyme supplementation at 100 or 150 mg/kg improved WG up to day 24, with the heaviest birds (1514 g/b) observed in the low CSM with 100 mg/kg enzyme group. Enzyme supplementation improved (P < 0.01) FCR all through the growth phases and also improved (P < 0.05) ileal crude protein and starch digestibility. High levels of CSM decreased the digestibility of starch, but this was improved (P < 0.05) by enzyme supplementation, showing an interaction between CSM and microbial enzyme on starch digestibility. The digestibility of arginine, glutamic acid and threonine improved with increased CSM inclusion, and that of methionine improved with increased enzyme supplementation. There was an interaction effect (P < 0.01) between CSM and enzyme on magnesium digestibility. Cottonseed meal inclusion improved the digestibility of copper and potassium and reduced the digestibility of phosphorus, while that of calcium and manganese was increased (P < 0.01) with enzyme supplementation. At day 10, lipase activity was increased (P < 0.05) by higher CSM levels, while on day 24, general proteolytic activity was highest (P < 0.05) when 100 mg enzyme was supplemented in the diet. These results indicate that relatively high levels of CSM in diet have no negative effects on the growth and digestive physiology of broiler chickens when supplemented with xylanase and β–glucanase.
一项 3 × 3 因子研究考察了饲喂含有或不含微生物酶的分级棉籽粕(CSM)日粮的家禽的性能、内源酶活性和营养物质(包括能量、蛋白质、淀粉、干物质、氨基酸和矿物质)的表观回肠消化率。九种等热量和等氮日粮主要由小麦/高粱/豆粕配制而成。在初生日粮、生长日粮和育成日粮中分别添加了无 CSM(0%)、低 CSM(5%、10% 和 15%)或高 CSM(6%、12% 和 18%)三种水平。日粮中添加 0、100 或 150 毫克/千克日粮的木聚糖酶和β-葡聚糖酶复合产品。九种日粮处理均随机分配到 6 个重复,每个重复 10 只鸡。分别在第 10 天、第 24 天和第 35 天记录采食量(FI)和增重(WG),并从中得出饲料转化率(FCR)。随着酶补充量的增加,第 35 天之前的采食量显著下降(P < 0.05)。在含 CSM 的日粮中,添加 100 或 150 毫克/千克的酶可改善第 24 天前的 WG,在添加 100 毫克/千克酶的低 CSM 组观察到最重的鸡(1514 克/磅)。添加酶制剂可提高(P < 0.01)整个生长阶段的饲料报酬率,还可提高(P < 0.05)回肠粗蛋白和淀粉消化率。高水平的 CSM 会降低淀粉的消化率,但补充酶后淀粉消化率会提高(P < 0.05),这表明 CSM 和微生物酶对淀粉消化率的影响是相互影响的。精氨酸、谷氨酸和苏氨酸的消化率随着 CSM 添加量的增加而提高,蛋氨酸的消化率则随着酶补充量的增加而提高。CSM 和酶对镁的消化率有交互作用(P < 0.01)。添加棉籽粕提高了铜和钾的消化率,降低了磷的消化率,而钙和锰的消化率则随着酶的添加而提高(P < 0.01)。在第 10 天,较高的 CSM 水平可提高脂肪酶活性(P < 0.05),而在第 24 天,日粮中添加 100 毫克酶时,一般蛋白分解活性最高(P < 0.05)。这些结果表明,在日粮中添加较高水平的 CSM 和木聚糖酶和β-葡聚糖酶不会对肉鸡的生长和消化生理产生负面影响。
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引用次数: 0
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European Journal of Agriculture and Food Sciences
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