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《中国蚕业》2003,(2)
一@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛$安徽省合肥蚕种场!230031@张涛… 相似文献
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糊化淀粉尿素对山羊消化代谢和增重的效果 总被引:3,自引:0,他引:3
选择36只本地白山羊随机分成3组进行饲养试验。配制3种分别含有豆粕、糊化淀粉尿素和尿素并达到等能等氮水平的混合材料,定量饲喂,干草自由采食。35天饲养试验后,每组选3只阉公羊作上述3种日粮的消化代谢试验。结果表明:(1)3种日粮的粗纤维表现消化率分别为64.65±5.58%、66.10±3.72%和61.49±7.61%。(2)3种日粮的氮代谢率分别为25.83±4.86%、22.25±7.0%和19.36±3.98%,糊化淀粉尿素日粮比尿素日粮提高14.93%。(3)与尿素日粮相比,动物采食含糊化淀粉尿素日粮后外周血液尿素浓度有所下降,且动态变化也相对平稳。(4)3个日粮组的日增重分别为68.45±35.84、70.83±31.28和61.91±31.80g/只,差异不显著(P>0.05);每千克增重所需日粮粗蛋白质分别为926.5、952.2和1133.2g,尿素日粮的饲喂效果最差。结果分析指出:糊化淀粉尿素产品能有效改善尿素氮的利用率,并能达到与豆粕相同的增重效果。 相似文献
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K. Kumar L. C. Chaudhary N. Agarwal D. N. Kamra 《Journal of animal physiology and animal nutrition》2014,98(5):879-885
To study the effect of supplementation of tannin degrading bacterial culture (Streptococcus gallolyticus strain TDGB 406) on growth performance, nutrient utilization and urinary purine derivatives of goats fed on oak (Quercus semicarpifolia) leaves. For growth study, eighteen billy goats (4 month old, average body weight 9.50 ± 1.50 kg) were distributed into three groups of six animals each. The animals of group 1 served as control while animals of groups 2 (T1) and 3 (T2) were given (@ 5 ml/kg live weight) autoclaved and live culture of isolate TDGB 406 (106 cells/ml) respectively. The animals were fed measured quantity of dry oak leaves as the main roughage source and ad libitum maize hay along with fixed quantity of concentrate mixture. The feeding of live culture of isolate TDGB 406 (probiotic) did not affect dry matter intake and digestibility of nutrients except that of dry matter and crude protein, which was higher in T2 group as compared to control. All the animals were in positive nitrogen balance. There was no significant effect of feeding isolate TDGB 406 on urinary purine derivatives (microbial protein production) in goats. The body weight gain and average live weight gain was significantly higher (p = 0.071) in T2 group as compared to control. Feed conversion efficiency was also better in the goats fed on live culture of TDGB 406 (T2). The feeding of tannin degrading bacterial isolate TDGB 406 as probiotic resulted in improved growth performance and feed conversion ratio in goats fed on oak leaves as one of the main roughage source. 相似文献
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Effects of different supplemental soya bean oil levels on the performance of prepubertal Saanen goats: Oestrogen and progesterone release
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G. F. Bomfim G. K. F. Merighe S. A. de Oliveira A. D. Rodrigues L. Augusto I. A. M. A. Teixeira K. T. de Resende J. A. Negrao 《Journal of animal physiology and animal nutrition》2016,100(6):1097-1103
The aim of this study was to investigate the effects of different levels of soya bean oil in the total diet on the growth rate, metabolic changes, and oestrogen and progesterone release in Saanen goats. After dietary adaptation, 21 prepubertal goats (weight of 29.12 ± 0.91 kg, 230 days old) were randomly distributed among three diets of D2: inclusion of 2% soya bean oil in the total diet; D3: basal diet – inclusion of 3% soya bean oil in the total diet; and D4: inclusion of 4% soya bean oil in the total diet. The basal diet (D3) was formulated to promote a daily gain of 0.140 kg. The goats were weighed, and their blood samples were collected weekly. Glucose, cholesterol, triglycerides, total protein, urea, non‐esterified fatty acids, beta‐hydroxybutyrate, oestrogen and progesterone in the plasma were measured. Prepubertal goats that were fed D4 exhibited a significantly lower dry matter intake, urea and cholesterol levels compared with the goats that were fed D2 and D3. Indeed, goats that were fed D4 displayed a significantly lower final weight than goats that were fed D2 and D3. In contrast, the inclusion of soya bean oil in the diet increased the progesterone and oestrogen concentrations, and goats that were fed D4 released a significantly higher concentration of progesterone than those that were fed D2 and D3. Furthermore, the percentage of goats with a progesterone level greater than 1 ng/ml (functional Corpus luteum) was significantly higher among the goats that were fed D3 and D4 than among those that were fed D2. In this study, although the inclusion of 4% soya bean oil in the diet decreased dry matter intake and growth rate, it increased progesterone concentration and the percentage of goats with a functional Corpus luteum, suggesting that the inclusion of soya bean oil accelerated puberty in prepubertal goats. 相似文献
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日粮不同纤维水平和精粗比对绒山羊瘤胃内中性洗涤纤维和酸性洗涤纤维消失率的影响 总被引:2,自引:0,他引:2
选用18只、2.5岁、体重25kg左右的安装永久性瘤胃瘘管的内蒙古白绒山羊羯羊,用尼龙袋法测定了3个精粗比(30∶70、20∶80、10∶90)6个中性洗涤纤维(NDF)水平(49%、52%、59%、55%、62%和65%)日粮中的中性洗涤纤维和酸性洗涤纤维(ADF)2、4、6、8、12、24、48和72h的消失率。结果表明:NDF水平为52%时,绒山羊日粮中的NDF和ADF消失率较高。精粗比例为30∶70、20∶80和10∶90时,绒山羊日粮中的中性洗涤纤维和酸性洗涤纤维消失率受影响不同,精粗比20∶80日粮组2~72hNDF和ADF消失率较高,其中2h和72h时NDF和ADF消失率明显高于30∶70和10∶90日粮组。由此可以得出,绒山羊配合饲料中纤维素水平为52%,精粗比例为20∶80较适宜。 相似文献
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试验旨在研究中药复方对日粮营养物质在山羊瘤胃内降解特性的影响。择6头健康的体重相近的安装有永久性瘤胃瘘管的周岁大足黑山羊羯羊,按3×3重复拉丁方试验设计,随机分为3组,1个对照组和2个处理组。对照组饲喂基础日粮,2个处理组分别在基础日粮上给每头羊日喂15 g复方Ⅰ和复方Ⅱ(由藿香、苍术、黄柏和生石膏等中药按不同比例组成)。采用瘤胃尼龙袋法对日粮精料和粗料干物质(DM)、有机物(OM)、粗蛋白质(CP)、中性洗涤纤维(NDF)及酸性洗涤纤维(ADF)在瘤胃内不同时间点的降解率进行测定,再根据动态降解率计算出降解模型参数及有效降解率。结果表明:复方Ⅰ能极显著提高精料DM和ADF及粗料DM、OM、NDF和ADF的有效降解率(P<0.01);复方Ⅱ能极显著提高精料DM及粗料DM、OM和ADF的有效降解率(P<0.01),显著提高精料ADF和粗料NDF的有效降解率(P<0.05)。研究结果提示,中药复方能改善山羊瘤胃降解能力,且复方Ⅰ作用效果优于复方Ⅱ。 相似文献
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William A. Hozza George C. Kifaro John G. Safari Daniel E. Mushi 《Tropical animal health and production》2013,45(8):1789-1794
A 2?×?3 factorial experiment was carried out to evaluate the effect of goat genotypes and different concentrate levels on growth and slaughter characteristics of Small East African × Norwegian crossbred (SEA × N) and Small East African (SEA) goats. The three concentrate levels were T0 (no access to concentrate), T66 (66 % access to ad libitum concentrate allowance) and T100 (100 % access to ad libitum concentrate allowance). Twenty-four castrated goats of each genotype (18 months old with an average weight of 16.7?±?0.54 kg) were randomly allotted into T0, T66 and T100 treatments. Daily feed intake and fortnight body weight measurements were recorded for the whole 84-day experimental period, after which the animals were slaughtered. Feed intake of T100 animals was 536 g/day, which was 183 g/day higher than that of the T66 group. Supplemented goats (T66 and T100) had significantly (P?<?0.05) higher daily gain and body condition score, and better feed conversion efficiency and dressing percentage than T0 goats. The SEA goats had higher (P?<?0.05) hot carcass weight (8.2 vs. 7.9 kg) and showed better (P?<?0.05) dressing percentage than SEA × N animals. Among supplemented goats, the cost of a 1-kg gain under T66 was Tshs 213/= cheaper than T100 (US$1?≈?Tshs 1,500). It is concluded that goats should be grazed and supplemented with 353 g concentrate/day for satisfactory fattening performance and higher economic return on investment. 相似文献
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Paengkoum P 《Tropical animal health and production》2011,43(2):491-494
Eighteen crossbred (Thai native x Anglo-Nubian) goats were chosen from a Suranaree University of Technology’s farm on the
basis of similar bodyweight (15.5 ± 3.5 kg). The goats were randomly allocated to three treatments in randomized complete
block design. Each goat was given urea-treated rice straw as roughage plus the respective treatment diets. The diets were
iso-nitrogenous and iso-energetic containing cassava pulp, molasses, urea, and commercial mineral and vitamin mix. The experimental
treatments were (1) soybean meal (SBM), (2) partial substitution of SBM with Streblus aspe Lour foliage, or (3) partial substitution of SBM with Leucaena (Leucaena leucocephala) foliage. Nutrient intakes, ruminal characteristics (pH, ammonia nitrogen, and volatile fatty acids), nitrogen balances,
and plasma urea nitrogen were not significantly different among treatments. The present results indicate that protein foliages
from locally grown shrubs and trees can substitute imported feedstuffs concentrate (e.g., SBM) as protein supplement for goat
production. 相似文献
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本试验选取21头10月龄、体重26kg左右的湘东黑山羊,随机分成3组,其中A组为对照组,饲喂基础日粮,B组和C组为试验组,分别在饲喂基础日粮的基础上,补饲尿素含量为7%和10%的尿素糖蜜舔砖,以研究尿素糖蜜舔砖对山羊增重效果的影响。结果表明:补饲尿素糖蜜舔砖后,湘东黑山羊营养状况大大改善,增重速度得到不同程度的提高。补饲舔砖的B、C试验组日增重分别为0.12kg和0.15kg,比对照组分别高50%和87.5%,试验C组比试验B组高2 5%,经方差分析差异及显著(P<0.01)。试验B、C组中每只羊比对照组分别多收入8.34元和17.13元。从而也得出10%尿素添加比7%尿素添加的舔砖补饲山羊的效果要好。 相似文献