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《养殖与饲料．饲料世界》2020,(3)
将450只海兰褐蛋鸡随机分成3组(对照组、0.1%添加剂量组、0.2%添加剂量组),对照组饲喂基础日粮,0.1%添加剂量组在基础日粮中添加0.1%黄芪多糖,0.2%添加剂量组在基础日粮中添加0.2%黄芪多糖,比较分析日均采食量、料蛋比、平均蛋重、产蛋率、不合格蛋率等检测指标,以期研究黄芪多糖对蛋鸡产蛋性能的影响。试验结果显示:0.1%添加剂量组与对照组相比,日均采食量提高1.12%,产蛋率提高了1.77个百分点,不合格蛋率降低了0.92个百分点。0.2%添加剂量组与对照组相比,日均采食量提高了2.11%,料蛋比降低了2.42%,产蛋率提高了4.03个百分点,不合格蛋率降低了1.44个百分点。0.2%添加剂量组与0.1%添加剂量组相比,产蛋率提高了2.23个百分点,不合格蛋率降低了0.52个百分点。表明黄芪多糖添加在蛋鸡基础日粮中能够显著提高蛋鸡的产蛋性能,且黄芪多糖添加剂量越大作用效果越明显,建议以0.2%作为临床添加剂量。 相似文献
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《饲料研究》2014,(17)
试验主要研究的是硫磺负离子添加剂对鸡蛋黄中氨基酸和脂肪酸的影响。选用960只日龄及体况比较一致而且健康无病的蛋鸡。采用完全随机设计,将960只蛋鸡随机分成A、B和C 3组,每组5个重复,每个重复64只鸡,预试期7 d,正试期42 d。A组饲喂基础日粮,B组饲喂基础日粮添加0.3%的硫磺负离子添加剂,C组饲喂基础日粮添加0.5%硫磺负离子添加剂。试验结果表明:蛋鸡日粮中加入硫磺负离子矿物质添加剂可以提高鸡蛋黄中不饱和脂肪酸的含量,降低饱和脂肪酸的含量;还可以提高鸡蛋黄中必需氨基酸和影响风味氨基酸的含量。且硫磺负离子矿物质添加剂的0.5%添加量组效果最好,对鸡蛋品质没有不良影响。 相似文献
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为了研究中草药饲料添加剂对蛋鸡产蛋性能的影响,将90只海兰褐蛋鸡随机分成对照组、低剂量组和高剂量组,对照组饲喂基础日粮,低剂量组、高剂量组分别在基础日粮中添加1%和2%剂量的中草药饲料添加剂。结果显示,低剂量组与对照组相比较,平均产蛋率显著增加(P<0.05),平均破蛋率显著降低(P<0.05);高剂量组与对照组相比较,平均日采食量、平均产蛋率均显著增加(P<0.05),平均破蛋率、料蛋比均显著降低(P<0.05);高剂量组与低剂量组相比较,平均产蛋率显著增加(P相似文献
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选用768只京白939商品蛋鸡随机分为4组,每组设4个重复.日粮中分别含有0%(对照组),1%,3%,5%复合矿物质添加剂,各组使用的基础日粮相同,随复合矿物质添加剂用量的增加,日粮中营养物质的浓度有所下降.试验期为7周.结果表明:①日粮中添加复合矿物质会提高蛋鸡的生产性能,其中试验2组、3组差异显著;②复合矿物质添加剂使蛋鸡血清中谷丙转氨酶、淀粉酶,血清甘油三酯的含量升高,其中试验2组效果最好,分别提高了31%,53%,24(P＜0.01).这表明该添加剂的使用使产蛋鸡对日粮中的三大有机物的利用率都呈现了明显升高的趋势. 相似文献
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日粮中添加不同剂量中草药对蛋鸡新城疫油乳剂灭活疫苗免疫效果的影响 总被引：1，自引：1，他引：0
本试验旨在研究日粮中添加不同剂量中草药对蛋鸡新城疫油乳剂灭活疫苗免疫效果的影响。选用240只100日龄海兰褐蛋鸡,随机分为4组,每组5个重复,每个重复12只。对照组饲喂基础日粮,不添加任何添加剂;试验Ⅰ、Ⅱ和Ⅲ组分别在基础日粮中添加0.5%、1.0%和1.5%中草药添加剂。结果表明,试验Ⅱ和Ⅲ组蛋鸡血清中新城疫抗体效价、雏鸡血清中新城疫母源抗体效价均显著高于对照组和试验Ⅰ组（P＜0.05）,且试验Ⅱ和Ⅲ组、对照组和试验Ⅰ组之间均无显著差异（P>0.05）。提示,在免疫注射疫苗的同时日粮中添加1.0%或1.5%中草药添加剂,可提高蛋鸡新城疫抗体效价,增强机体的免疫力。 相似文献
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试验旨在探讨中草药饲料添加剂对蛋鸡产蛋性能的影响,选取53周龄健康海兰褐蛋鸡120只,随机分成4组,每组6个重复,每个重复5只。对照组饲喂基础日粮,试验1组、2组、3组是在基础日粮的基础上添加0.75%、1.5%、3%中草药添加剂的日粮,试验为期7周,试验结果表明在蛋鸡饲料里分别添加0.75%、1.5%、3%中草药添加剂,蛋鸡的产蛋率和日均产蛋量均有不同程度的提高,与对照组相比,试验2组产蛋率、日均产蛋量分别提高5.33%、6.58%,差异显著(P0.05),可见在蛋鸡饲料里添加中草药饲料添加剂可以提高蛋鸡的产蛋性能,且添加1.5%中草药饲料添加剂效果较好。 相似文献
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《养殖与饲料．饲料世界》2015,(7)
通过选用健康、产蛋均匀、产蛋率达80%的本地蛋鸡270只,随机作6个处理,每个处理3个重复。分18个栏,每栏15只蛋鸡,分别饲以A(基础日粮)、B(基础日粮+1%沸石粉)、C(基础日粮+2%沸石粉)、D(基础日粮+3%沸石粉)、E(基础日粮+4%沸石粉)、F(基础日粮+6%沸石粉),进行为期56 d的试验,考察日粮中添加不同比例沸石粉对蛋鸡生产性能的影响。结果表明,在蛋鸡日粮中分别添加1%、2%、6%沸石粉降低了蛋鸡的产蛋率;日粮中添加4%沸石粉蛋鸡的生产性能与对照组相比差异不显著,但有提高生产性能的趋势;在蛋鸡日粮中添加3%沸石粉显著提高蛋鸡的生产性能和经济效益。 相似文献
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玛曲县草畜平衡优化方案与管理决策初探 总被引：1，自引：0，他引：1
利用玛曲县2001-2009年的草地畜牧业动态监测资料和社会经济统计数据,通过MATLAB 7.9软件的多目标规划方法,以维持草畜平衡、优化畜群结构和保护草地生态环境为总目标,综合考虑畜群结构优化、牧业生产、生态保护3个方面的约束条件,研究了规划期(2010-2012年)玛曲县草地畜牧业发展的优化方案及管理对策,对比分析了2套不同收入水平的优化方案。结果表明:减少家畜数量,加大周转是实现上述目标的根本途径,其具体措施包括调整牲畜数量和优化畜群结构。优化方案表明玛曲县若减少149.18×104 SU后,能实现草畜平衡;提高出栏率,增强畜牧业生产效益,从优化方案中发现出栏率保持在31%以上能够使牧民收益最大化;增加补饲,全县每年至少补饲精饲料4万kg;拓宽经济收益渠道,发展旅游等其他产业,将增强该县经济弹性。 相似文献
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摘要：基于生态脆弱地区环境的敏感性和不稳定性等特征,构建一种包括主动性保护、开发性保护及重建性保护三层结构的旅游环保模式。采用推理演绎及对比分析的研究方法,揭示传统旅游环保模式的环境保护与旅游开发的脱节性和环保行为的滞后性缺陷,虽然其已有部分程度上的脱节性改善,但仍不适用于生态脆弱地区的旅游环境保护。而较为有效的模式应是将旅游开发与环境保护更加充分地结合,甚至环境保护工作要占较大比例或超前进行,而且环境保护工作的重点要向以开发行为的外界输入促进环境改善和环境重建的方向转变。 相似文献
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P R Cheeke J A Schmitz E D Lassen E G Pearson 《American journal of veterinary research》1985,46(10):2179-2183
Dried tansy ragwort containing pyrrolizidine alkaloids was fed as 2.5% of a complete (control) diet to Hereford steers, with and without (basal) a mixture of additives. The additives provided a dietary supplement equivalent to 0.1% ethoxyquin, 1% methionine hydroxy analog, 2% MgO, 2.7 mg of vitamin B6/kg of diet, 50 micrograms of vitamin B12/kg of diet, 0.45 g of folic acid/kg of diet, and 0.2 g of cobalt/kg of diet. The additives did not alter tansy ragwort toxicity substantially, as assessed by liver histologic changes, sulfobromophthalein clearance rate, and serum gamma-glutamyl transpeptidase activity. After 281 days, 1 of 4 steers fed the basal diet was alive, whereas 3 of 4 steers in the basal plus additives group were alive, suggesting some protective activity. The chronic lethal dose of tansy ragwort in steers was 3.6% of initial body weight. 相似文献
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试验旨在研究不同水平的糖蜜和青贮添加剂（复合菌制剂,以植物乳杆菌为主）对“张杂谷”全株青贮发酵品质和营养成分的影响。以灌浆期“张杂谷”全株作为青贮原料,试验设5个处理组,即对照组（直接青贮）、Ⅰ组（1.5‰青贮添加剂）、Ⅱ组（2%糖蜜＋1.5‰青贮添加剂）、Ⅲ组（4%糖蜜＋1.5‰青贮添加剂）、Ⅳ组（6%糖蜜＋1.5‰青贮添加剂）,青贮期60 d。结果显示：①试验组在感官评分上均优于对照组,试验组干物质（DM）含量均显著高于对照组（P＜0.05）,粗蛋白质（CP）含量均高于对照组;②显著降低了试验组（除Ⅰ组外）青贮饲料中酸性洗涤纤维（ADF）、中性洗涤纤维（NDF）和半纤维素（HC）含量（P＜0.05）,对灰分含量影响不大（P＞0.05）;③与对照组相比,试验组pH、氨态氮/总氮（AN/TN）值均显著降低（P＜0.05）,乳酸显著提高（P＜0.05）,Ⅰ、Ⅳ组乙酸含量均显著降低（P＜0.05）,各试验组丙酸含量均显著降低（P＜0.05）,在试验组和对照组中均没检出丁酸和异戊酸。综合分析认为,糖蜜和青贮添加剂能改善“张杂谷”全株青贮的发酵品质,推荐用量为4%糖蜜＋1.5‰青贮添加剂。 相似文献
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B J Garrett D W Holtan P R Cheeke J A Schmitz Q R Rogers 《American journal of veterinary research》1984,45(3):459-464
Dried tansy ragwort, which contains pyrrolizidine alkaloids, was fed as 10% of a complete diet to ponies, with and without a mixture of additives. The additives provided a dietary supplement equivalent to 1% cysteine, 0.75% butylated hydroxyanisole, 200 micrograms of vitamin B12/kg of feed, and 5 mg of folic acid/kg of feed. The additives did not alter tansy ragwort toxicity, as assessed by survival time, liver changes, sulfobromophthalein (BSP) clearance rate, serum gamma-glutamyl transpeptidase activity, and plasma amino acid patterns. In ponies fed tansy ragwort, BSP clearance rate was a sensitive indicator of liver damage, and decreased to about 20% of control values. gamma-Glutamyl transpeptidase activities showed considerable variability, but generally were elevated in animals fed tansy ragwort. Liver iron and copper concentrations increased, and liver zinc concentrations decreased in tansy ragwort-fed ponies. Plasma amino acid patterns in tansy ragwort-fed ponies showed changes typical of those observed in liver disease. 相似文献
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V.V. Carvalho M.F. Paulino E. Detmann M.L. Chizzotti L.S. Martins A.G. Silva S.A. Lopes F.H. Moura 《Tropical animal health and production》2017,49(5):983-988
A grazing trial was carried out to evaluate the inclusion of three feed additives in supplements (crude protein, CP 230 g/kg dry matter, DM) on the performance, voluntary intake, and digestibility of beef heifers grazing Brachiaria decumbens (CP 81 and neutral detergent fiber, NDF 615 g/kg DM). Thirty-five Nellore heifers (21 months of age and 383 ± 6.29 kg of body weight, BW) were used in a completely randomized design. The treatments were as follows: no supplement (control); supplement fed at 1 kg/animal/day without additives (S); supplement with monensin (S + M); supplement with yeast culture (S + YC); and supplement with enzyme complex (S + EC). All of the supplemented heifers had greater (P < 0.1) average daily gain (～0.186 kg/day) compared to the control treatment (0.014 kg/day). Average daily gain and final BW were similar (P > 0.1) among supplemented heifers. Monensin inclusion in the supplement decreased (P < 0.1) forage DM (expressed as g/kg BW) and NDF intake (expressed as kg/day and as g/kg BW). All of the feed additive inclusions decreased (P < 0.1) NDF digestibility. In conclusion, the heifers’ performance was improved by concentrate supplementation. However, the inclusion of additives did not enhance this effect. 相似文献
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AbstractA small pen trial was conducted to evaluate the effects of diet supplementation with sea urchin shell powder on the broiler performance and ammonia emissions in poultry houses for 28 days. A total of 120 male broilers (n = 30 birds/treatment) were fed four diets supplemented with 0%, 0.1%, and 1.0% sea urchin shell powder or 1% feed additives. The use of sea urchin shell powder and feed additives improved growth performance compared to the controls. When compared with the control group at four weeks, ammonia fluxes were decreased by 29.2%, 37.6%, and 27.9% for 0.1% and 1.0% sea urchin shell powder and 1% feed additives, respectively, which could be due to the reduced litter pH. The addition of 1% sea urchin shell powder was effective in improving growth and reducing negative environmental impacts. It is suggested that the decrease in the ammonia level was mainly related to the lower litter pH. 相似文献