共查询到20条相似文献,搜索用时 15 毫秒
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《The Journal of Applied Poultry Research》2017,26(2):192-199
Feeding high-quality pellets to modern commercial broilers may maximize genetic potential; however, this typically requires an increased cost to produce feed. Therefore, it is important to determine if incremental improvements in feed form (FF) can increase performance of modern broiler strains. The current study was conducted to investigate the effects of feeding modest improvements in feed form (50, 60, 70, or 80% intact pellets; IP) to 2 commercial broiler strains (fast-growing or high-yield) on d 28 to 42 growth performance and processing variables. A common diet was manufactured to contain 80% IP, of which a portion was ground to create a total of 4 FF treatments varying in IP to ground pellet ratios: 50:50; 60:40; 70:30; and 80:20. Fast-growing (FG) birds demonstrated improvements in body weight (BW), BW gain (BWG), and feed conversion ratio (FCR) when compared to high-yield (HY) birds. For the main effect of FF, feeding 80 vs. 50% IP reduced d 28 to 42 FCR. Also, feeding birds 80% IP vs. all other FF treatments improved d 28 to 42 BWG and d 42 BW. A Strain × FF interaction established that FG broilers fed 50, 60, and 70% IP diets had higher d 43 total breast yield than HY birds fed the same FF treatments; however, both strains demonstrated similar total breast yield when 80% IP were fed, which suggests that FG broilers are less sensitive and HY broilers are more sensitive to increasing FF. These data suggest a distinct benefit for feeding improved FF from d 28 to 42 to modern broilers. 相似文献
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《The Journal of Applied Poultry Research》2009,18(2):259-268
Typically, in a vertically integrated poultry (broiler or turkey) operation, maintaining adequate feed manufacturing production proves to be a challenge. To evaluate an alternative management strategy, 2 studies were conducted to examine the effects of feeding broilers cracked corn and a concentrated pellet on broiler growth performance from 0 to 41 d of age. Cracked corn (0, 25, 50, 75, or 100%) was used to replace the corn fraction in the diet for all 3 stages of growth. Cracked corn and concentrate pellets were blended together to be isonitrogenous and isocaloric among all treatments, so only feed form would differ. Experiment 1 diets included a control (0% cracked corn) and experimental diets (25, 50, 75, or 100%) in which cracked corn directly replaced the ground corn fraction. Overall (0 to 41 d), a linear decrease (P < 0.001) for ADG and ADFI and a linear increase (P < 0.003) for FCR was observed as cracked corn levels increased. In experiment 2, a “step-up” feeding program of cracked corn was evaluated with dietary treatments including the following: 1) control (0% cracked corn throughout feeding), 2) 0% cracked corn (0 to 17 d) and 25% (18 to 41 d), 3) 0% cracked corn (0 to 17 d) and 50% (18 to 41 d), 4) 25% cracked corn (0 to 41 d), and 5) 50% cracked corn (0 to 41 d). Overall (0 to 41 d), ADG for treatment 1, 2, and 4 was greater than 3 and 5 (P < 0.05). Feed conversion ratio was superior for treatments 2 and 4 (P < 0.05) in comparison with treatments 3 and 5. Up to 25% of the dietary corn can be fed to the broiler as cracked corn from 0 to 41 d without a negative response on growth performance. 相似文献
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Xiao‐Chuan Liu Zai‐Bin Yang Wei‐Ren Yang Shu‐Zhen Jiang Gui‐Guo Zhang 《Animal Science Journal》2013,84(3):231-237
An experiment was conducted to compare effects of emulsified soybean oil and non‐emulsified soybean oil on the quality of broiler feed differing in the feed type and the broiler feeding stage in vitro. A 2 × 2 × 3 factorial arrangement was designed with two fat sources (soybean oil and emulsified oil), two feed types (mash and pellet) and three broiler feeding stages (starter, grower and finisher). Four samples of feeds were collected from each combination of factors at the beginning of the experiment and stored at 20°C. Subsamples were taken at 15‐day intervals to determine the moisture content, peroxide value (PV), acid value (AV) and the total fungal count over a 45‐day period; weight loss percentage was determined by weighting the samples at days 0, 15, 30 and 45; fines percentage in pellets was only determined at day 0. The emulsified oil reduced (P < 0.05) the fines percentage, increased (P < 0.05) the moisture content, decreased (P < 0.05) the weight loss percentage and PV, did not affect (P > 0.05) the AV and the total fungal count. Results showed that the emulsified oil decreased weight loss, increased pelletability, moisture content and oxidation stability without affecting fungal growth. 相似文献
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早期限饲对肉仔鸡的影响 总被引:2,自引:0,他引:2
遗传育种选育和营养水平的改进,在使肉仔鸡生长速度不断提高的同时带来了一系列负面影响,如脂肪沉积、代谢性疾病、骨骼疾病、死亡率增加。早期限饲在改善这些问题上有一定的作用。本文综述了早期限饲对肉仔鸡的生产性能和健康状况等影响,并对早期限饲的进一步研究方向进行了展望。 相似文献
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试验研究了原料粉碎粒度、调质温度、后熟化时间、入模水分和环模压缩比五个因素对水产颗粒料耐水性的影响。结果表明:①通常鱼用饲料的粉碎粒度过40目(0.425mm)≥95%、调质温度控制在85℃以上、原料入模水分在14%~16%、后熟化时间为10~15min,环模压缩比在15左右为宜;②河蟹配合颗粒饲料的粉碎粒度过80目≥90%、调质温度控制在80~90℃、原料入模水分在17%~20%、后熟化时间在20~30min、环模压缩比在18~20为宜;③对虾配合颗粒饲料的粉碎粒度过80目≥90%、调质温度控制在80~90℃、原料入模水分在17%~20%、后熟化时间在20~30min、环模压缩比在18~22为宜。 相似文献
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随着畜牧产品市场的不断变化,市场竞争的日益加剧,饲料企业在目前的发展阶段面临着诸多挑战.为了更好地生存与发展,饲料企业需要通过绩效考核来提高生产车间的效率,从而增加经济效益.本文分析了目前我国饲料企业生产车间绩效考核的现状和存在的问题,探讨了优化和完善生产车间绩效考核体系的相关措施,以期能够提高生产车间的工作效率和饲料... 相似文献
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本研究旨在评价不同水分和颗粒粒度的高粱制粒或膨化对不同原料粒度、肉鸡代谢能、氨基酸回肠消化率和肉鸡生长性能的影响。试验以720只雄性雏鸡为研究对象,随机分为6组,每组6个重复,每个重复20只。试验处理以2×2×2因子设计,即2种加工方式(制粒和膨化),2个调质水分(1.6%和0.8%),2个颗粒粉碎粒度(650和850μm)。结果显示:在添加1.6%水分的膨化日粮中,制粒制粒和颗粒耐久指数较高。850μm的粒径增加了饲料颗粒耐久指数。各处理组对肉鸡日增重和屠体性状均无显著影响(P>0.05)。在10~13 d饲喂颗粒饲料和添加1.6%水分的饲料的肉鸡表观代谢能和氮校正代谢能均较高(P<0.05),与添加膨化性饲料相比,高粱制粒饲料回肠赖氨酸和甘氨酸消化系数显著提高(P<0.05)。在评价饲料加湿效果时,饲料添加1.6%水分后赖氨酸、蛋氨酸、胱氨酸、甘氨酸、组氨酸、异亮氨酸和精氨酸回肠表观消化系数显著升高(P<0.05)。1.6%水分的膨化饲料较0.8%水分显著提高了21 d肉鸡采食量(P<0.05),在42 d时,0.8%水分的颗粒饲料显著提高了采食量(P<0.05)。结论:以650μm的粉碎粒度和1.6%的水分制备颗粒饲料在肉鸡生长后期可以提高回肠氨基酸消化率和表观代谢能,而膨化工艺提高了42 d肉鸡饲料颗粒制粒和饲料转化率。 相似文献
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试验对颗粒饲料和粉状饲料饲喂吉戎兔效果生长性能的影响进行了初步探讨。试验选取胎次相同,初始体重无显著差异(P>0.05),60~66日龄健康吉戎幼兔100只,公母各半,随机分为2组,试验组饲喂颗粒饲料,对照组饲喂粉状饲料。试验期为30 d。试验结束测定2组平均日增重、平均日采食量以及料重比;测定日粮中的粗蛋白、粗脂肪、粗纤维表观消化率。结果表明:颗粒饲料组与粉状饲料组日增重差异显著(P<0.05),颗粒饲料组比粉状饲料组提高了9.57%;颗粒饲料组与粉状饲料组料重比差异显著(P<0.05),颗粒饲料组比粉状饲料组降低了13.13%;颗粒饲料组与粉状饲料组的粗蛋白、粗脂肪消化率差异显著(P<0.05),分别提高了9.01%、5.00%,粗纤维消化率的差异极显著(P<0.01),提高了31.87%。 相似文献
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《The Journal of Applied Poultry Research》2009,18(2):310-317
Poor pelleting production rates can raise the milling cost and increase the frequency of feed outages for broiler integrated operations. The number of broilers marketed to heavy BW has been increasing, and meeting feed delivery schedules can be problematic with “big bird” complexes. Adding rolled corn post pellet is a management strategy to increase feed production rate while concurrently decreasing energy use of the grinding and pelleting processes. This study evaluated the addition of screened rolled corn to pelleted feed on live performance and meat yield of broiler chickens during a 56-d grow-out. Four dietary treatments were provided: A) a control, no added corn post pellet from 18 to 56 d of age; B) addition of 25% of the formulated corn post pellet from 18 to 56 d of age; C) addition of 10, 20, and 30% of the formulated corn post pellet from 18 to 35, 36 to 46, and 47 to 56 d of age, respectively; and D) addition of 20, 30, and 40% of the formulated corn post pellet from 18 to 35, 36 to 46, and 47 to 56 d of age, respectively. Final BW, cumulative feed conversion, 38-d BW uniformity, and 57-d breast meat weight and yield were similar among the dietary treatments. These results indicate screened rolled corn can be added post pellet without adversely affecting broiler performance and meat yield. 相似文献
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Jie Liu Ming Qi Yakuan Huang Jiao Guo Jiacai Zhang Chong Li Niya Zhang Lvhui Sun Desheng Qi 《Animal Science Journal》2017,88(8):1075-1081
This study was performed to determine the effects of oils on feed mildew and feed quality. Under different moisture content conditions (10%, 13% and 16%), the basal feeds were supplemented with 4%, 6%, 8%, 10% and 12% soybean oil. In addition, at different moisture content levels (10%, 13% and 16%), the basal feed was supplemented with 12% of various types of oil (soybean, peanut, corn and fish). Subsequently, a mixed mold spore suspension was added. The feed samples were incubated at 28°C, and the total mold, water activity (Aw), moisture, acid value, crude protein (CP), crude lipid (CL), crude ash (CA) and nitrogen‐free extract (NFE) levels were determined at 15, 30, 45 and 60 days. The results showed no significant variations in the feed moisture, CP, CL, CA and NEF contents. However, the acid value gradually increased in the feed samples with an extended incubation time and increasing initial moisture. The feed moisture content was a critical factor controlling feed mildew, and high levels of oil supplementation caused an elevated Aw. Additionally, peanut oil promoted mold growth in feed. These results provide a reference for the production and scientific management of formulated feed. 相似文献