鱼精粉在肉鸡日粮中替代进口鱼粉的效果

选用ＡＡ肉鸡进行试验,试验在生产后期进行,试验分为两组：对照组（含有３％的秘鲁鱼粉）和试验组（含有３％的鱼精粉）,两组的营养水平接近。试验组平均日增重为４７．１８ｇ,对照组为４７．０６ｇ;试验组的料肉比为２．６８４,对照组为２．７４５。两者的重要生产性能指标接近,差异不显著。试验结果表明,在生长后期的肉鸡日粮中,使用鱼精粉替代进口鱼粉并不影响试验鸡的生产性能。     

活性酵母在肉鸡日粮中的应用效果初探

选择1日龄岭南黄肉雏鸡1000羽,随机分成5个处理组,每组设4个重复,每个重复50羽(公母各半)。各处理组肉鸡日粮分别添加活性酵母菌0×107(对照)、0.5×107、1×107、2×107、4×107CFU/g。结果显示,肉鸡日粮中添加活性酵母1×107CFU/g或2×107CFU/g可显著提高肉鸡肠道淀粉酶、脂肪酶和胃蛋白酶的活性(P<0.05)。活性酵母显示出提高肉鸡平均日增重、降低耗料增重比的作用,但均未达到显著水平(P>0.05)。盲肠内容物微生物检测结果提示,日粮中添加活性酵母有改善肉鸡肠道微生态环境的趋势。     

酵母蛋白粉与血浆蛋白粉在乳仔猪日粮中应用效果的研究

本试验旨在研究乳仔猪日粮中添加喷雾干燥血浆蛋白粉和酵母蛋白粉对其生产性能、断奶后腹泻率以及血清免疫指标的影响。试验选择18窝乳猪随机分为3组,每组6窝。处理1日粮中添加5%血浆蛋白粉,处理2日粮中添加5%酵母蛋白粉,处理3日粮中添加2.5%血浆蛋白粉+2.5%酵母蛋白粉;试验分7~25日龄断奶和25~40日龄2个阶段。结果表明:酵母蛋白粉替代血浆蛋白后,各处理日增重、采食量和饲料增重比方面均无显著性差异(P>0.05);处理2和处理3的仔猪腹泻率比处理1分别降低了37.93%和21.86%;3个处理组血清中免疫球蛋白(IgG、IgM和IgA)水平无显著性差异(P>0.05)。试验结果表明,乳仔猪料中可以使用酵母蛋白粉部分或全部替代血浆蛋白粉。     

酵母饲料在肉鸡日粮中的应用初探

1材料与方法 1.1试验动物与材料 　　1日龄爱拔益加肉仔鸡 150只；酵母饲料 (用甘薯淀粉渣自行生产，含酵母菌 1.48× 107个，粗纤维 13.45％ )。 1.2试验设计与饲养管理 　　试验鸡随机分为 3组，每组 50只鸡，从 1日龄开始至 43日龄，试验期分为两阶段，即 0日龄～ 21日龄为第一阶段， 21日龄～ 43日龄为第二阶段，各组各阶段日粮组成见表 1。饲养管理按肉鸡饲养手册进行管理。 表 1试验各组各阶段日粮 日龄/d组别对照组试验组1试验组2 1～21CS1CS1＋2％YCCS1＋4％YC 22～43CS2CS2＋2％YCCS2＋4％YC 注 1.CS1：玉米 62％、豆粕 …     

豌豆在肉鸡日粮中的应用效果研究

选取3 240只AA肉仔鸡随机分为6组,每组6个重复,每个重复90只鸡。对照组饲喂基础日粮,试验组分别在饲养的前、中、后期添加10%、20%、30%的豌豆来研究在肉鸡日粮中添加不同水平的豌豆对肉鸡生产性能的影响。结果表明:在试验前期,不管日粮中添加10%、20%、30%的豌豆,均可极显著(P<0.01)降低肉鸡的日采食量,但从肉鸡全程的饲养数据看,即使前、中、后期日粮中的豌豆添加比例均达到30%,对肉鸡全程的生产性能(成活率、末重和肥育指数)和全净膛率没有显著影响(P>0.05)。     

日粮中糖萜素替代抗生素对肉鸡生产性能的影响

选用1日龄AA肉用仔鸡1680羽，分设三组，每组设有重复，进行55天试验，探讨日粮中糖萜素替代抗生素对肉鸡生产性能的影响，结果表明，日粮中添加糖萜素替代抗生素可提高肉鸡成活率、饲料转化效率和饲养效益，体增重和采食量与使用抗生素的日粮相近，肉鸡日粮中糖萜素替代抗生素具有明显的综合生产效益。     

日粮中添加益生素在肉鸡生产中替代抗生素的试验报告

从易县付双林肉鸡场选用1日龄健壮AA肉仔鸡180只．随机分为2组，分别为抗生素对照组（添加丁胺卡那霉素）、试验组（添加益生素），每组设2个重复．每个重复45只鸡；试验分两个阶段即0-21日龄和22-42日龄，共42天（出栏前7天开始停药）。试验结果表明：试验组的日增重、料肉比、死亡率及腹泻率比对照组均有显著改善（p〈0．05）。     

日粮中糖萜素替代抗生素对肉鸡生产性能的影响

选用1日龄AA肉用仔鸡1680羽分设三组，每组设有重复，进行了55天试验，探讨了日粮中糖萜素来替代抗生素对肉鸡生产性能的影响。结果表明日粮中添加糖萜素替代抗生素可提高肉鸡成活率，饲料转化率和饲养效益，体增重和采食量和使用抗生素的日粮相近。肉鸡日粮中糖萜素替代抗生素具有明显的综合生产效益。     

中华蚱蜢替代肉鸡饲料鱼粉的研究

分析了中华蚱蜢 (AcridacinereaThunberg)的营养成分 ,观察了其干粉取代饲料鱼粉对肉鸡生产性能的影响 ,并进行了相关分析。结果表明 ,中华蚱蜢干粉取代鱼粉在 2 0 %和 40 %组 ,肉鸡日增重、耗料量、料肉比等生产性能均可取得与鱼粉配制饲料同样的效果 ,但中华蚱蜢干粉取代 60 %以上的各组肉鸡生产性能下降。显示了其可以部分取代饲料中鱼粉的功能。     

Replacement of canola meal with Moringa oleifera leaf powder affects performance and immune response in broilers

Moringa oleifera is known as a miracle tree due to its amazing nutritional and therapeutic properties. Considering its nutritional value, Moringa oleifera leaf powder can be used as a non-conventional ingredient in poultry diets. This study was conducted to investigate the effect of the replacement of canola meal (CM) with Moringa oleifera leaf powder (MOLP) on growth performance, blood hematology, and immune response in broilers. Two-hundred-twenty one-day-old Hubbard broiler chicks were reared in one group for a wk (adaptation period). At 8 d of age, 150 chicks of similar body weight (±5g) were selected and randomly divided into 15 experimental units, each comprising 10 chicks. These experimental units were further allocated to 5 treatment groups that were fed Ration A (control), B, C, D, and E, containing 8% CM and 0% MOLP, 6% CM and 2% MOLP, 4% CM and 4% MOLP, 2% CM and 6% MOLP, and 0% CM and 8% MOLP, respectively. The experimental diets were fed to the broilers for a period of 31 d. The results of the present study suggest that replacement of CM with MOLP as a vegetable protein source can enhance the immune response to Newcastle disease and infectious bursal disease vaccination without any change in weight gain, body organ weight, and blood hematology in broilers. The results also indicate that replacement of CM with MOLP results in higher feed intake with some negative effects on FCR in broilers.     

蚯蚓粉替代鱼粉对罗氏沼虾生长性能的影响

本试验旨在研究日粮中不同比例蚯蚓粉替代鱼粉对罗氏沼虾生长性能的影响.试验采用单因子设计,选取200尾罗氏沼虾幼虾,随机分为5组,即Ⅰ组(0%蚯蚓粉+100%鱼粉)、Ⅱ组(10%蚯蚓粉+90%鱼粉)、Ⅲ组(20蚯蚓粉+80%鱼粉)、Ⅳ组(30%蚯蚓粉+70%鱼粉)、Ⅴ组(40%蚯蚓粉+60%鱼粉),每组4个重复,每个重复...     

Utilization of alternative protein meals with or without multiple-enzyme supplementation in broilers fed low-energy diets

An experiment was conducted to study the effect of different protein meals, with or without enzyme supplementation, on the performance of broilers. A diet based on a combination of protein meals (15% soybean meal, and 5% each of sunflower meal, canola meal, rapeseed meal, and cottonseed meal) was compared with 4 other diets containing 15% soybean meal and 20% of sunflower meal, canola meal, rapeseed meal, or cottonseed meal. Experimental diets were formulated to contain 2,630 kcal of ME/kg and 0.95% digestible lysine, with all other essential amino acids set to meet or exceed the ideal protein ratios. Each diet was fed with or without supplemental exogenous enzyme (Rovabio Excel at 500 g/metric ton of feed) to 6 replicate pens of 50 chicks from 1 to 35 d posthatch as coarse mash. In the cottonseed meal-based diet, supplemental enzyme resulted in high 35-d feed intake and FCR compared with the cottonseed meal-fed groups with no enzyme. There was a significant (P < 0.05) diet × enzyme interaction for 35-d feed intake and FCR. Birds fed the sunflower meal-based diet had significantly (P < 0.05) higher final BW gain and lower FCR as compared with those fed rapeseed meal- or cottonseed meal-based diets, whereas the BW gain of birds fed the rapeseed meal-based diet was significantly (P < 0.05) reduced compared with birds in all other groups. In conclusion, in low-ME broiler diets formulated on a digestible amino acid basis, up to 20% sunflower meal and canola meal can be safely incorporated into the diet. Supplementation of Rovabio failed to exert any positive effect on production parameters when used with diets containing high levels of each of the common protein meals.     

Substitution of plant protein for fish meal in the diet of laying ducks

Fish meal is a good source of protein feed that can be used to get a high production yield even though it has a comparatively higher price. Plant protein has been found to substitute for fish meal without any adverse effect on production as well as helping to reduce feed cost. Moreover, it is not necessary for a level more than 5% fish meal in the diet of laying ducks. One type of plant protein is soybean meal, considered one of the most valuable sources of vegetable protein and whose amino acid composition is comparable to that of milk protein. In a soybean meal, the first limiting amino acid is methionine. Soybean meal can substitute for fish meal in laying ducks' diet but supplementation of methionine and lysine is recommended. Since sesame meal is rich in methionine and agrinine, 50% of soybean meal can be replaced by sesame meal without adverse effects. Leucaena leaf meal is also a valuable source of protein (26%) and carotenoids but it also has a toxic amino acid (mimosine). However, soaking leucaena leaf meal in water can remove the toxic amino acid and can be used, together with added methionine and lysine, as 10% of the diet for laying ducks.     

The protein oxidation of soybean meal induced by heating decreases its protein digestion in vitro and impairs growth performance and digestive function in broilers

1. The soybean meal (SBM) was heated at 100°C for 1, 2, 4 and 8 h, respectively, and their resultant oxidative status was evaluated.

2. A total of 400 one-day-old Arbor Acres broilers were randomly divided into 5 treatments with 8 replicates of 10 birds each, and fed with diets containing non-heated SBM (NHSBM) or 1 of 4 heated SBMs (HSBMs, SBMs heated at 100°C for 1, 2, 4 and 8 h, respectively) for 42 d.

3. The contents of carbonyl in the SBMs were both linearly and quadratically increased, whereas the nitrogen solubility index, and in vitro digestibility of crude protein (CP) and dry matter (DM) in the SBMs were both linearly and quadratically decreased as heating time increased (P < 0.05). The concentrations of sulfhydryl and total sulfhydryl in the SBMs were linearly decreased as heating time increased (P < 0.05).

4. The average daily gain was linearly decreased while the feed conversion ratio (FCR) was linearly increased in broilers as heating time of dietary HSBMs increased during both d 22–42 and d 1–42 of study (P < 0.05), though FCR of broilers during d 22–42 study were unaffected when the heating time of dietary HSBMs was 1 h (P > 0.05). The serum glucose concentration and the activity of trypsin at d 42, and the apparent total digestibility of CP and DM were all linearly reduced in broilers when heating time of dietary HSBMs increased (P < 0.05). However, 1 h HSBM has a numerical higher CP and DM digestibility than NHSBM. The serum urea nitrogen contents were both linearly and quadratically increased at both d 21 and 42 (P < 0.05), and relative pancreas weight was linearly increased at d 42 in broilers as heating time of dietary HSBMs increased (P < 0.05).     

酵母培养物与抗生素对肉仔鸡生长性能及免疫机能影响的研究

用 2 1 0只 1日龄艾维茵肉仔鸡 ,随机分成 7组 ,即 :对照组、 0 1 %、 0 3%、 0 5 %、 0 7%、 0 9%酵母培养物组和抗生素组 (5mg/kg ) ,每组设 3个重复 ,每个重复 1 0只鸡 ,试验期 2 8d,研究不同添加水平的酵母培养物和抗生素对肉仔鸡生长性能和免疫机能的影响。试验结果表明 :0 3%的酵母培养物组日增重、日采食量、饲料转化率 ,较对照组略有提高 ,但差异不显著 (P >0 0 5) ,抗生素组与对照组和酵母培养物组相比差异显著 (P <0 0 5) ;各组之间营养物质代谢率差异不显著 (P >0 0 5) ,酵母培养物组有提高的趋势 ;酵母培养物显著降低大肠杆菌的数量 ,提高双歧杆菌的数量 (P <0 0 5) ,抗生素显著降低了大肠杆菌和双歧杆菌的数量 (P <0 0 5) ;酵母培养物显著提高了肉仔鸡血清IgA、IgG水平(P <0 0 5)和IgM水平 (P >0 0 5)。     

肉仔鸡日粮中添加苜蓿草粉效果研究

为探讨添加苜蓿粉日粮对肉仔鸡生产性能、胴体品质等指标的影响。饲养试验采用21日龄的艾维茵肉仔鸡(公母比1:1)200只,分为5个处理,每个处理4个重复,每个重复10只鸡。处理Ⅰ、Ⅱ、Ⅲ、Ⅳ分别饲喂不含苜蓿粉、含2%苜蓿粉、4%苜蓿粉、6%苜蓿粉的日粮。试验期22～42日龄。屠宰试验在42日龄进行,每处理组选4只鸡(公母比1:1)。试验结果表明:添加苜蓿草粉组肉仔鸡的平均日增重均略低于对照组,平均日采食量、耗料增重比均高于对照组。平均日采食量随苜蓿粉添加量增加呈现先升高后降低的规律,但组间差异均不显著(P>0.05);添加苜蓿草粉组的肉鸡的皮肤颜色和胫颜色均比对照组深,以添加4%草粉组的皮肤颜色最深,添加4%和6%草粉组的胫颜色与对照组相比差异极显著(P<0.01);添加苜蓿草粉组的肉鸡的腹脂率均略高于对照组,且随着草粉含量的增加而增加;各处理间的屠宰率、半净膛率、全净膛率、胸肌率、腿肌率均无显著差异(P>0.05)。苜蓿可作为良好的天然色素添加剂,对肉仔鸡生产性能、胴体品质无显著影响。     

金鲳鱼饲料中发酵豆粕替代鱼粉的研究

试验采用单因子试验设计,选用初始体重为(60±4)g的金鲳鱼(Trachinotus ovatus),随机分成5个处理,每个处理3个重复,每个重复20尾鱼,饲养在浮式海水网箱中,进行为期65 d的试验。在对照组配方中鱼粉用量为51%的基础上,分别用13%、24%、34%和44%的发酵豆粕代替配方中9%、16%、23%和31%的鱼粉用量,研究发酵豆粕代替鱼粉对金鲳鱼生长性能的影响。试验结果表明:在金鲳鱼饲料中用发酵豆粕代替23%的进口鱼粉,金鲳鱼的增重率、特定生长率、饲料系数与对照组无显著性差异(P>0.05)。在本试验条件下,发酵豆粕代替25%的鱼粉用量对金鲳鱼的生产性能不会产生不良影响。