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作者对利用复合尿素添加剂代替豆饼饲喂小肥牛的增重效果进行比较试验，结果表明，试验组头均总增重１３６．０ｋｇ，日均增重１．１３ｋｇ，比对照组头均总增重１０９．０ｋｇ，日均增重０．９１ｋｇ分别提高２４．８％和２４．２％，组间增重差异显著。试验缓头均收益比对照组多２３５元。 相似文献
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全牧制饲养闽南黄牛越冬效果试验 总被引：1，自引：1，他引：0
随要选择２周组闽南黄牛３６头，于当年１１月至翌年４月份分别用全牧制和传统饲养方式越冬，结果用全牧制越冬的闽南黄牛平均头增重４．１８ｋｇ，对照组平均头减重５．２２ｋｇ，相左９．４０ｋｇ；其中怀孕母牛和空怀母牛分别比对照组增加了１５．７０ｋｇ和１０．１３ｋｇ。３－５月龄犊牛试验组平均日增重为０．２８ｋｇ±０．０３ｋｇ，比对照组增加了１５５％；越冬期间的怀孕母牛，追踪其所生犊牛的平均初生重为１３．８０ｋ 相似文献
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复合营养舔砖饲养黄牛试验 总被引：4，自引：0，他引：4
利用糖蜜、尿素及其它副产品等非常规饲料,加上矿物盐微量元素、维生素等研制成三种不同配方的复合营养舔砖,进行饲喂１４￣１６月龄黄牛试验。结果表明：在９０天试验期中,试验组Ｉ组、Ⅱ组、Ⅲ组平均日增重分别比对照组提高２９．１％、３１．９％和４４．５％;每增重１ｋｇ消耗精料试验组比对照组分别降低２２．６％、２３．６％和３０．２％;饲料成本试验组比对照组分别降低３．７％、５．０％和１２．９％。牛肉成份分析结 相似文献
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仔猪日粮中添加畜禽旺营养添加剂（１０ｇ／头／日），进行增重试验，饲喂３０天后，头均增重和头均日增重试验组比对照组分别增加４．４８ｋｇ和０．１５ｋｇ（Ｐ〉０．０１），分别提高７１．６８％和７０．４８％，饲料报酬提高２５．８％。 相似文献
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试验组（Ｔ组）Ⅰ期（高蛋白块添）、Ⅱ期（ＥＭ块添）、Ⅲ期（矿物块添）的日增重分别比同期对照组（Ｄ组）高１７７ ｇ、１１０ ｇ、１８５ ｇ，增长率分别为１７．２ ％、１１．２ ％、２０．８ ％，ｔ检验差异显著（Ｐ ＜ ０．０５）。Ｔ组比Ｄ组每增重１ ｋｇ消耗的精料（ｋｇ）、ＭＥ（ＭＪ）、ＤＣＰ（ｇ）都有较大幅度的下降，其中Ⅰ期分别降低０．６ （１６．０ ％）、１２．６ （１４．１ ％）、４４．６（７．０ ％），Ⅱ期分别降低０．４ （８．２ ％）、８．５（８．９ ％）、５８．５ （８．６ ％），Ⅲ期分别降低０．８（１７．７ ％）、１６．９ ％（１５．８ ％）、１１５．２（１５．３ ％），ｔ检验差异显著 （ Ｐ＜ ０．０５ ）。Ⅰ期、Ⅱ期、Ⅲ期，试验组比对照组，头均每日增加纯收入为１．３２元、０．７８元、１．３８元，收益率为１∶１３．２、１∶７．８、１∶１３．８。按１２０ ｄ肥育期计算，头均多产肉２１．２ ｋｇ、１３．２ ｋｇ、２２．２ ｋｇ，头均可增加收入１５８．４元、９３．６元、１６５．６元。 相似文献
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选用泌乳性能中等的当地母牛１５头和其平均出生日龄１１５天的利木赞杂一代哺乳公犊１５头。母，子牛自由采食青贮玉米结，犊牛补料配方为两种全价饲料，经７３天，补料试验，两个补料的试验组的平均日增重均显著高于不补料的对照组，其中试验１组平均日增重０．８２３ｋｇ，试验２组０．７９２ｋｇ。试验１组的平均总增重比对照组多２４．６５ｋｇ，试验２组则多２２．４５ｋｇ；试验１组的平均每ｋｇ额外增重所耗饲料２．７７ｋｇ 相似文献
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采用中国人民解放军３４１９工厂研制的Ｄ、Ｆ、Ｇ号复合蛋白替代鱼粉饲喂育肥猪，经６０天试验，对照组猪头均总增重３７．５５ｋｇ、日增重０．６２６ｋｇ，Ｄ、Ｆ、Ｇ三个试验组砂均总增重３５．７４、３６．９３、３６．５７ｋｇ、，日增重０．５９６、０．６１６、０．６１０ｋｇ、Ｐ〉０．０５；每增重１ｋｇ活重，Ｄ、Ｆ、Ｇ组的饲料成本分别比对照组降低２．０％、８．７７％、５．５２％，每头猪全期可分别节省饲料费４．４ 相似文献
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将６０头断奶仔猪，随机分成１０组，用三种中草药配方，各配方按０．５％，１％，１．５％的比例分别加入相同基础日粮中，对断奶仔猪进行的比较研究，得到：Ａ配方比对照组增重高１７．９％（Ｐ＜０．０５），料肉比降低９．２７％（Ｐ＜０．０５），经济效益提高２２．５４％（Ｐ＜０．０１），建议在生产中以添加剂１％于日粮中为度。 相似文献
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Effect of high temperature and low-protein diets on the performance of growing-finishing pigs 总被引：6，自引：0，他引：6
The effects of reducing CP level in combination with an increase in ambient temperature (29 vs 22 degrees C) on performance and carcass composition were studied in a factorial arrangement of treatments involving 66 Piétrain x (Landrace x Large White) barrows from 27 to 100 kg BW. Animals were fed at each temperature one of three experimental diets that provided 0.85 or 0.70 g of digestible lysine per megajoule of NE, in the growing (27 to 65 kg) and the finishing (65 to 100 kg) phases, respectively. Diet 1 was a corn, wheat, and soybean meal diet formulated without crystalline AA; CP levels were 20.3 and 17.6% for the growing and the finishing phases, respectively. In Diets 2 and 3, CP level was reduced by substituting part of the soybean meal with corn and wheat (Diet 2), or with corn, wheat, and 4% fat (Diet 3). Diets 2 and 3 were supplemented with AA and balanced according to the ideal protein concept. The CP levels of Diets 2 and 3 were, respectively, 15.8 and 16.3% in the growing phase, and 13.4 and 13.8% in the finishing phase. Pigs were housed individually and had free access to feed and water. The ADFI was measured daily, and animals were weighed weekly. Carcass composition was measured at slaughter (100 kg BW). Increasing ambient temperature from 22 to 29 degrees C resulted in a 15% reduction in ADFI and 13% lower ADG. Leaner carcasses (P < 0.01) were obtained at 29 degrees C (22.8 vs 24.8% carcass fat). At 22 degrees C, ADFI was lower (P < 0.05) for the low-CP diets, but daily NE intake, ADG, and carcass composition were not affected (P > 0.05). At 29 degrees C, ADFI was not different (P > 0.05) between diets and daily NE intake was higher (P < 0.05) with Diet 3 than with Diet 1, and the difference was more important during the finishing period than during the growing period. Using the model ADFI = a BWb, estimates of b were 0.65, 0.53, and 0.53 at 22 degrees C and 0.50, 0.44, and 0.50 at 29 degrees C, for Diets 1, 2, and 3, respectively. The higher NE intake for Diet 3 at 29 degrees C did not improve ADG (P > 0.05) but increased mainly fat deposition. These results indicate that a 4 percentage unit reduction of dietary CP level reduces N excretion (minus 37%) but does not affect growth and carcass composition as long as the ratio between essential AA and NE are kept optimal. In addition, diets with reduced CP limit the effect of high ambient temperature on ADFI. Finally, our results demonstrate the significance of using NE, rather than DE or ME, for formulating diets. 相似文献
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144头75日龄小猪随机分成3个处理组,每组设4个重复。1组为对照日粮组;2组别为对照日粮+300g/tα-半乳糖苷酶;3组别为对照日粮+500g/tα-半乳糖苷酶,此外,2组和3组的日粮在配方设计时,将豆粕的代谢能和氨基酸参数分别提高7%和5%,营养水平的计算值与1组相同。2组和3组的日粮配方成本比1组分别低41和25元/t(已扣除酶制剂使用成本)。通过连续40d(75～115日龄)的饲喂,结果表明,在3个组别之间,"增重"和"平均日增重"都没有显著的差异,而对照日粮组的"耗料量"略高于2组和3组。添加500g/tα-半乳糖苷酶的3组,其"料肉比"显著低于对照组;添加α-半乳糖苷酶的2组和3组每千克增重成本分别降低0.15和0.55元。因此,α-半乳糖苷酶在配方中的添加使用可以在不影响动物生长性能的前提下显著降低饲料的配方成本和养殖成本。 相似文献
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J.L. Veracini P.M. Walker M.J. Faulkner R.E. Hall R.L. Atkinson B.R. Wiegand 《Livestock Science》2013,157(1):151-161
Corn distiller's grains plus solubles (DGS) have become a common replacement for shelled corn in diets of finishing steers. Numerous studies have evaluated DGS inclusion, both wet (WDGS) and dry (DDGS), into feedlot diets with conflicting reports on feedlot performance and subsequent meat quality. Many authors have failed to describe the nutrient composition of the DGS utilized in their studies making it difficult to determine why different studies have different results. The objective of this study was to evaluate the feedlot performance and subsequent meat quality characteristics of steers fed high fat (10.36±0.72%), modified wet corn distiller's grains plus solubles (HWDGS) at 0, 25, 40, and 70% of the diet dry matter (DM). Angus cross steers (n=240; 335±55 kg) were blocked by source and stratified within block (3 blocks) by body weight (BW) to 32 treatment pens containing either 6 or 10 steers/pen. Pens within block were randomly assigned to one of four diets containing 15% corn silage: (1) 76.9% shelled corn, 6.4% soybean meal 1.5% limestone, 0.2% premix (0 HWDGS); (2) 25.0% HWDGS, 58.20% shelled corn 1.6% limestone, 0.2% premix (25 HWDGS); (3) 40.0% HWDGS, 42.74% shelled corn 2.06% limestone, 0.2% premix (40 HWDGS); (4) 70.0% HWDGS, 12.30% shelled corn 2.5% limestone, 0.2% premix (70 HWDGS). Target BW at harvest was 591 kg±23 kg with 121 steers harvested on day (d) 161 and 117 steers on d 224. Hot carcass weight and liver abscess scores were recorded on d of harvest. Longissimus muscle area, rib fat thickness, marbling score, and kidney, pelvic and heart fat were measured after a 24 h chill. No significant differences were observed between treatments regarding average daily gain (ADG) or BW. Steers fed 0 HWDGS had significantly lower average daily feed intake (ADFI) than steers fed HWDGS and the response was quadratic at lower ADFI. Steers fed 70 HWDGS had lower (P<0.05) dry matter intake (DMI) compared to steers fed lower HWDGS concentrations. Steer gain to feed ratio (G:F) was significantly higher for steers fed 70 HWDGS compared to 0, 25, or 40 HWDGS with a quadratic response at higher % HWDGS diets. Mean United States Department of Agriculture (USDA) quality grade was average choice. Mean USDA yield grade was 3.0. Steers fed 70 HWDGS had significantly smaller rib eye areas and a linear trend (P=0.08) to have lower USDA quality grades compared to steers fed lower HWDGS inclusion rates. Increasing dietary HWDGS increased polyunsaturated fatty acid (PUFA) and PUFA/saturated fatty acid concentrations in intramuscular fat with both a linear and quadratic effect. High fat modified WDGS can be fed up to 70% of diet DM without compromising feedlot performance, carcass characteristics, or meat quality. 相似文献
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本研究的目的是观察不同日粮形态对合浦鹅生长性能及养分利用的影响.将72羽28日龄的合浦鹅随机分为3组,每组3个重复,每个重复8羽(公母各1/2).A组饲喂基础精料+蟛蜞菊鲜草;B组饲喂基础精料+蟛蜞菊草粉混合的粉料;C组饲喂基础精料+蟛蜞菊草粉混合后制成的颗粒料.A组前期(28～48 d)日粮精料和蟛蜞菊鲜草的比例为1:2(风干:新鲜),后期(49～69 d)为1:3;B和C日粮组中蟛蜞菊草粉用量则参照A组鲜草的风干物质含量和比例的折算结果等量添加,同时用4 mol/L HCI AIA方法测定合浦鹅对日粮的养分消化率.试验期为42 d.结果表明:日粮B和日粮C在试验的第一阶段能显著提高试验鹅的采食量,但在整个试验期间3种日粮的采食量并没有明显差异(P>0.05).A、B和C组试验鹅全期日均精料采食量分别为208.38、207.22和205.73 g;平均日增重为56.07、62.42和63.44 g;料重比为3.72、3.32和3.24;3组日粮之间的日均精料采食量无显著差异(P>0.05),但B和C组的平均日增重和料重比显著优于A组(P<0.05),而B和C组间没有显著差异(P>0.05).3组日粮的养分消化率除了前期的干物质、粗蛋白质和P以及后期的粗蛋白质、Ca和P的消化率相近以外,B和C组日粮的能量、中性洗涤纤维、酸性洗涤纤维和半纤维素的消化率在两期的试验中均显著优于A组(P<0.05).此外,B和C组试验鹅的屠宰率和腹脂率也显著高于A组(P<0.05).可见,用草粉构成的B或C组的日粮形态饲用效果明显优于A组,故在生产上宜将鲜草加工成草粉后使用. 相似文献
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Effect of receiving diets containing alfalfa and certain feed additives on performance of feeder pigs transported long distances 总被引：1，自引：0，他引：1
Three experiments were conducted to determine the effect of receiving diets containing alfalfa meal and certain feed additives on performance of comingled feeder pigs transported 900 to 1,100 km. In Exp. 1, the inclusion of 9.4% dehydrated alfalfa meal in receiving diets for 2 wk resulted in no difference (P greater than .1) in gain or feed conversion from purchase to market compared with pigs fed a basal corn-soybean meal (CS) diet or a diet containing 20% ground whole oats (O). In Exp. 2, pigs fed receiving diets containing 10% dehydrated alfalfa meal had no improvement (P greater than .1) in gain (.60 vs .61 kg/d) or conversion (3.25 vs 3.17) compared with CS-fed pigs. In Exp. 3, pigs fed a receiving diet for 2 wk containing 10% mid-bloom alfalfa ate more (P less than .002) feed daily for 2 wk (.82 vs .76 kg) and overall (P less than .04; 1.92 vs 1.85 kg) and had an improved (P less than .03) daily gain from purchase to market (.61 vs .59 kg) compared with CS-fed pigs. In Exp. 2, pigs fed diets containing 44 mg/kg tylosin (T) gained similar to pigs fed no additive (O) and slower (P less than .01) than pigs fed 110 mg/kg chlortetracycline (CTC; .59, .60 and .63 kg/d), with no significant differences in feed to gain conversion (3.12, 3.23 and 3.18).(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
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玉米DDGS饲喂肉鸭的营养价值研究 总被引：3，自引：0，他引：3
试验用不同添加水平的玉米DDGS代替豆粕饲喂樱桃谷肉鸭,旨在探讨其饲喂肉鸭的营养价值。试验采用单因素完全随机分组设计,共设5个处理组,分别添加0(对照组)、2%、4%、6%和8%的玉米DDGS。每组3个重复,每个重复40只。结果表明:在采食量方面各添加DDGS组与对照组相比有提高的趋势,但差异不显著(P>0.05);在平均日增重和料肉比方面,2%、4%和6%组与对照组差异不显著(P>0.05),而8%组日增重极显著低于对照组(P<0.01),料肉比极显著高于对照组(P<0.01);在饲料增重成本方面,各添加DDGS组均低于对照组。可见,在肉鸭饲料中添加到6%的DDGS不影响肉鸭的生产性能,但是可以明显降低成本,取得较好的经济效益。 相似文献
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饲粮乳清粉含量对乳猪培育性能的影响 总被引：7，自引：0，他引：7
以含乳清粉5、10、15％的乳猪料以及不含乳清粉的酸化乳猪料和合资企业生产5311乳猪料饲喂1～5周龄的杜浙杂交仔猪32窝。仔猪5周龄断奶平均体重分别为8.20±0.19、7.09±0.21、7.81±0.16、7.87±0.18和7.71±0.23公斤(P<0.01);其平均日增重相应为192.0±5.0、162.2±5.3、182.8±4.4、181.0±4.9和178.7±6.3克(P<0.05);饲料/增重分别为0.19、0.30、0.20、0.26和0.26;7～35日龄仔猪成活率分别为98.6、98.3、98.6、98.3和100％;每公斤增重的乳猪料成本为0.30、0.53、0.40、0.41和0.45元。从上述指标分析,以含5％乳清粉的饲粮组较好。 相似文献
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A total of 272 Cotswold pigs (17 +/- 1 d) were utilized in three experiments to evaluate the nutritive value of spray-dried egg proteins for early-weaned pigs. In all experiments, pigs were stratified by sex and initial BW and then assigned randomly to experimental diets. In Exp. 1, four corn-soybean meal-based diets containing 7% of either spray-dried porcine plasma (SDPP), spray-dried technical albumen (SDTA), SDTA stored at 70 degrees C for 3 d (SDTA-ht), or spray-dried whole egg (SDWE) were assigned to five pens each with four pigs for a 3-wk study period. Average daily gain, ADFI, and gain:feed ratio (G:F) were determined. At the end of wk 3, five pigs per treatment were killed to determine ileal AA and energy digestibilities, as well as Enterobacteriaceae counts. Compared with the SDPP diet, ADG and G:F were lower (P < 0.05) for SDTA-, SDTA-ht- and SDWE-containing diets. Apparent ileal digestibilities of cystine, histidine, isoleucine, methionine, and threonine in the SDPP diet were lower (P < 0.05) than in diets containing spray-dried egg products. Ileal digestible energy content did not differ (P > 0.05) in all diets (3.1 to 3.2 Mcal/kg). Enterobacteriaceae counts were lower in the SDTA-ht diet than in either the SDTA or SDWE diets (P < 0.05). In Exp. 2, the effect of substituting SDPP with varying levels of SDTA was investigated. Diets were randomly assigned to five pens (except for the 100% SDTA diet, which had four pens), each with four pigs. Average daily gain, ADFI, and G:F decreased linearly as the level of SDTA was increased in the diet (P < 0.05). Replacing SDPP with SDTA at 25 or 50% had no effect on pig performance (P > 0.10). In Exp. 3, phase I diets containing 0, 25, or 50% SDTA in place of SDPP (7% of the diet) were each assigned at random to eight pens each with four pigs for a 14-d period, after which all pigs were switched to a common phase II diet lacking both SDPP and SDTA for another 14 d. Average daily feed intake and ADG did not differ among all diets in phase I and II and overall (d 0 to 28). Pigs fed the diet containing 50% SDTA in phase I had lower (P < 0.05) G:F than those fed the SDPP diet. The results indicate that technical albumen can replace 25 to 50% of SDPP in early-weaned pig diets without compromising performance, and further suggest that heat-treated SDTA may affect intestinal microbial population in pigs. 相似文献
19.
Montgomery SP Drouillard JS Sindt JJ Farran TB Pike JN Trater AM Coetzer CM LaBrune HJ Hunter RD Stocks RA 《Journal of animal science》2003,81(7):1671-1680
Two experiments were conducted to evaluate the effects of alfalfa hay (AH) and wet corn gluten feed (WCGF) combinations on ADG and gain efficiency of cattle limit-fed growing diets. In Exp. 1, crossbred beef steers (n = 220; initial BW = 262 kg) were limit-fed diets consisting of steam-flaked corn and 40% WCGF (DM basis) with 0, 10, or 20% ground AH (0AH, 10AH, and 20AH, respectively). A fourth diet containing 20% ground AH and steam-flaked corn served as a control. All diets were fed once daily at 1.8% of BW (DM basis). Growing period ADG, gain efficiency, and dietary NE calculated from performance data decreased linearly (P < 0.01) with addition of AH to diets containing WCGF. Rate of DMI increased linearly (P < 0.05) with AH addition to diets containing WCGF. Following the growing period, steers were finished on a common diet offered ad libitum. Gain efficiencies during the finishing period were higher (P < 0.05) for steers fed the 20AH diet than for steers fed the control diet. In Exp. 2, crossbred beef heifers (n = 339; initial BW = 277 kg) were limit-fed diets containing steam-flaked corn with 10, 20, or 30% ground AH and 0, 40, or 68% WCGF in a 3 x 3 factorial arrangement, fed once daily at 1.6% of BW (DM basis). An AH x WCGF interaction occurred (P < 0.05) for growing period ADG and gain efficiency. Increasing AH or WCGF decreased cattle ADG, gain efficiency, and dietary NE with the exception of heifers fed 30AH/40WCGF, which had ADG that did not differ (P > 0.10) from that of heifers fed 20AH/0WCGF or 30AH/0WCGF, and which had greater gain efficiencies (P < 0.05) than heifers fed 30AH/0WCGF. Rate of DMI increased linearly (P < 0.01) with increasing AH and decreased linearly (P < 0.01) with increasing WCGF. Heifers were finished on diets containing 33% WCGF with 0 or 0.5% added urea (DM basis) offered ad libitum. Increasing WCGF in growing diets tended (linear, P < 0.10) to increase finishing ADG and gain efficiency, whereas increasing AH decreased (linear, P < 0.05) kidney, pelvic, and heart fat, and the percentage of carcasses grading USDA Prime. Urea tended to increase ADG (P < 0.10), but decreased (P < 0.04) the percentage of carcasses grading USDA Choice. Results suggest that the value of WCGF relative to steam-flaked corn in limit-fed growing diets might be improved in diets containing 30% AH relative to diets containing 10 or 20% AH. 相似文献
20.
《The Professional Animal Scientist》2004,20(6):512-517
Crossbred pigs (six replicate pens of four pigs per treatment, avg. initial BW = 38 kg) were used in a 6-wk growth and digestibility trial to assess a hull-less barley adapted for the mid Atlantic region of the U.S. as the primary ingredient in pelleted diets for growing pigs. There were five experimental diets: 1) a corn-soybean meal-based diet, 2) a diet containing 46% hull-less barley and 1.6% added fat, 3) a diet containing 41% hulled barley and 4.1% added fat, 4) a diet containing 46% hulled barley and 1.6% added fat, and 5) a diet containing 46% wheat and 0.68% added fat. For diets based on small grains, a fixed inclusion rate of 25% corn was used. With the exception of Diet 4, all diets were formulated to be iso-lysinic and iso-caloric. Diet type had no effect (P>0.10) on ADFI or ADG. Pigs fed the hulled barley, high-fat diet (Diet 3) had slightly improved feed efficiency (P<0.05) relative to pigs fed the corn, hull-less barley or hulled barley, low-fat diets. Only minor differences in digestibility of DM, energy, and protein were observed among the corn, hull-less barley, hulled barley, high-fat, and wheat diets. The digestibility of these components in the hulled barley, low-fat diet (Diet 4) was 3.9 to 6.9 percentage units less (P<0.05) than in the other diets. These results demonstrate that good quality hulled and hull-less barley adapted for the mid-Atlantic region of the U.S. can be used at a relatively high inclusion rate in pelleted grower pig diets and produce growth performance comparable with similar diets based mainly on corn or wheat. 相似文献