全文获取类型
收费全文 | 236篇 |
免费 | 3篇 |
国内免费 | 18篇 |
专业分类
农学 | 4篇 |
3篇 | |
综合类 | 76篇 |
水产渔业 | 8篇 |
畜牧兽医 | 166篇 |
出版年
2022年 | 2篇 |
2021年 | 7篇 |
2020年 | 3篇 |
2019年 | 8篇 |
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 3篇 |
2015年 | 5篇 |
2014年 | 10篇 |
2013年 | 12篇 |
2012年 | 4篇 |
2011年 | 11篇 |
2010年 | 9篇 |
2009年 | 30篇 |
2008年 | 29篇 |
2007年 | 20篇 |
2006年 | 14篇 |
2005年 | 7篇 |
2004年 | 14篇 |
2003年 | 4篇 |
2002年 | 10篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 5篇 |
1998年 | 5篇 |
1997年 | 4篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1989年 | 5篇 |
1988年 | 4篇 |
排序方式: 共有257条查询结果,搜索用时 31 毫秒
1.
二丁酰环腺苷酸对猪胴体组成和肉品质的影响 总被引:1,自引:0,他引:1
通过皮下注射和饲料添加不同剂量dbcAMP进行饲养试验 ,研究其对肥育猪胴体组成和肉品质的影响。结果表明 :皮下注射 1.0mg/kg和饲料添加 2 0mg/kg对改善肥育猪的胴体组成和肉品质效果最好 ,眼肌面积分别提高31.99%和 36 .39% (P <0 .0 5 ) ;瘦肉率分别提高 12 .4 2 %和 11.94 % (P <0 .0 5 ) ;背膘厚分别降低 19.95 %和 2 0 .97%(P <0 .0 5 )。肌肉粗蛋白含量分别提高 10 .87%和 16 .5 4 % (P <0 .0 5 )。 相似文献
2.
饲喂柠条对肉兔生产性能及胴体性状影响的研究 总被引:2,自引:0,他引:2
选用45~48日龄平均体重1050g的伊普吕(父系)幼兔64只,分成4组,进行柠条饲喂肉兔试验.对照组饲粮中谷草比例为33.4%,试验Ⅰ、Ⅱ、Ⅲ组分别用10%、20%和33.4%柠条替代等比例谷草.48天试验结果为:对照组、试验Ⅰ、Ⅱ、Ⅲ组日均采食量、日增重、料肉比分别为89.84g、92.95g、90.77g、79.95g,22.60g、23.30g、19.24g、17.90g,3.98:1、3.99:1、4.72:1、4.47:1.试验Ⅰ、Ⅱ组与对照组日采食量、日增重、料肉比差异不显著(P>0.05);屠宰试验结果为:试验Ⅰ、Ⅱ与对照组在胴体重、屠宰率、净肉率、肉骨比、心脏、肺脏、肝脏、肾脏等指标方面无显著差异(P>0.05);而试验Ⅲ组日采食量、日增重均显著较对照组差(P<0.05).试验结果表明:生长肉兔饲粮中添加10%~20%柠条粉是可行的,且饲粮成本较低. 相似文献
3.
为研究不同品系杜洛克作为终端父本对其后代商品猪胴体性状的影响,选取214和108头分别由美系和加系杜洛克公猪配种、出生时间相近(±2 d)和体重相近(35±5 kg)的后代三元商品猪进行育肥饲养,结束饲养后开展屠宰试验,测定背膘厚度、眼肌厚度、瘦肉率和肋骨数。结果显示:加系杜洛克商品后代的背膘厚度、眼肌厚度显著(P<0.05)高于美系杜洛克后代商品猪;加系杜洛克后代商品猪的瘦肉率、肋骨数显著(P<0.05)低于美系杜洛克。同一品系不同性别间背膘厚度、眼肌厚度、瘦肉率均不显著(P>0.05),加系商品公猪肋骨数极显著低于母猪肋骨数(P<0.01)。结论:美系杜洛克后代商品猪的胴体性状优于加系杜洛克后代商品猪。 相似文献
4.
Two single nucleotide polymorphisms in the promoter of the ovine myostatin gene (MSTN) and their effect on growth and carcass muscle traits in New Zealand Romney sheep
下载免费PDF全文
![点击此处可从《Zeitschrift für Tierzüchtung und Züchtungsbiologie》网站下载免费的PDF全文](/ch/ext_images/free.gif)
J. Wang H. Zhou J. Hu S. Li Y. Luo J.G.H. Hickford 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2016,133(3):219-226
Myostatin is a negative regulator of muscle growth and development in mammals, and variation in ovine myostatin gene (MSTN) has been demonstrated to be associated with variation in the muscularity of sheep. Polymerase chain reaction–single‐stranded conformational polymorphism (PCR–SSCP) was used to look for single nucleotide polymorphisms (SNPs) in a 304‐bp amplicon from the promoter region of ovine MSTN. Sequence analyses revealed two previously identified SNPs (c.?2449G/C and c. ?2379T/C) that resulted in three haplotypes (H1 (c.[?2449G; ?2379C]), H2 (c.[?2449C; ?2379C]) and H3 (c.[?2449G; ?2379T]). The effect of these SNPs on growth and carcass traits was investigated in 357 NZ Romney lambs. General linear mixed‐effect models revealed that sheep with the genotype c.?2449GC had a higher loin meat yield (p = 0.032) and proportion loin yield (p = 0.028), than those with the genotype c.?2449GG. The genotype c.?2379CC was associated with an increase in three weight traits: birthweight (p = 0.003), tailing weight (p = 0.009) and weaning weight (p = 0.028), when compared with the genotype c.?2379TC, but it was not found to have an association with growth rate. This suggests that c.?2379T/C has an effect that originates at, or before birth. Haplotype H3 was associated with a decrease in birthweight (p = 0.002), tailing weight (p = 0.003) and weaning weight (p = 0.011). Haplotype H2 was associated with increased loin yield (p = 0.012) and proportion loin yield (p = 0.002). The SNPs may have value as genetic markers for improved Romney breeding. 相似文献
5.
6.
研究测定了鲁烟白猪与鲁育杜洛克杂交商品猪的生长肥育性能、胴体性能及肉品质。结果表明:鲁育杜洛克×鲁烟白猪组合生长性能较高,与鲁烟白猪×鲁烟白猪相比,平均日增重提高6.37%(P>0.05),料重比降低7.98%(P>0.05);鲁育杜洛克×鲁烟白猪组合胴体性能显著提高,眼肌面积和瘦肉率分别提高47.89%(P<0.01)和10.69%(P<0.05);平均背膘厚和脂肪率分别降低27.70%(P<0.01)和22.20%(P<0.05),肌肉干物质含量提高5.25%(P<0.05);背最长肌17种氨基酸含量无显著差异;背最长肌脂肪酸含量差异显著,棕榈酸和硬脂酸含量分别提高54.63%(P<0.01)和54.24%(P<0.05);油酸和亚油酸以鲁烟白猪×鲁烟白猪较高,分别比鲁育杜洛克×鲁烟白猪提高42.36%(P<0.01)和39.48%。 相似文献
7.
8.
主要研究在玉米豆粕基础日粮中添加酵母培养物(YC)对肉仔鸡屠宰性能及胴体品质的影响。将960只1日龄肉仔鸡随机等分为4组,其中试验3组,对照1组,试验组分别添加2.5 g/kg,5 g/kg,7.5 g/kg的YC,试验期为1~42 d。结果表明:①试验各组肉仔鸡的胸肌率、腹脂率、半净膛率和全净膛率与对照组相比差异不显著(P>0.05),但添加2.5 g/kg、7.5 g/kg YC的试验组可显著提高肉仔鸡的腿肌率(P<0.05);②在肉鸡日粮中添加YC显著降低了胸肌、腿肌的剪切力(P<0.05);滴水率有下降趋势(P>0.05);pH值(45 min)亦有降低。研究证明:在日粮中添加一定量的YC能降低肉仔鸡胴体肌肉的剪切力及滴水损失,提高肉的嫩度及持水能力,达到改善肉鸡的屠宰性能和肌肉品质的目的。 相似文献
9.
Comparisons of carcass traits,meat quality,and serum metabolome between Shaziling and Yorkshire pigs
Bo Song Changbing Zheng Jie Zheng Shiyu Zhang Yinzhao Zhong Qiuping Guo Fengna Li Cimin Long Kang Xu Yehui Duan Yulong Yin 《动物营养(英文)》2022,8(1):125
This study aims to compare the meat quality of Shaziling and Yorkshire pigs and to find the potential indicator in serum for superior meat quality.Six Shaziling and Yorkshire pigs at 30,60,90,150,210,and 300 d of age were selected to examine carcass traits,meat quality,and serum metabolome.The results showed that the body weight,carcass length,and loin eye area of Shaziling pigs at 150,210,and 300 d of age were significantly lower than those of Yorkshire pigs(P<0.05).Shaziling pigs at 150 and 300 d of age had significantly lower backfat thickness than Yorkshire pigs(P<0.05).Compared with Yorkshire pigs,Shaziling pigs at all 6 ages had a lower lean percentage and a higher fat percentage(P<0.05).At 60,90,and 150 d of age,the post-mortem pH-decline,b*value(yellowness),and drip loss of Shaziling pigs were significantly lower than those of Yorkshire pigs(P<0.05).Moreover,at 150 d of age,Shaziling pigs had significantly higher a*value(redness)and intramuscular fat(IMF)content than Yorkshire pigs(P<0.05).Correlation analysis between the top 40 metabolites and phenotypes indicated that L-carnitine had positive correlations with fat percentage,pH24h,and IMF content,but had negative correlations with lean percentage,L*value(lightness),and b*value(P<0.05).Serum L-carnitine content,fat percentage,pH24h,and IMF content all decreased first and then increased as the pigs grew,which verified the positive correlations between L-carnitine and these phenotypes.In conclusion,Shaziling pigs have a slower growth rate but a better meat quality than Yorkshire pigs.The meat quality of Shaziling pigs is the best from 150 to 210 d of age.This study suggests that a higher serum L-carnitine content is a promising indicator for better meat quality. 相似文献
10.
不同育肥及屠宰体重对杂交商品猪生长性能及胴体肉品质的影响研究 总被引:1,自引:1,他引:0
试验研究了不同育肥及屠宰体重对试验猪的生长性能及胴体肉品质的影响,结果显示:育肥结束体重在85~110kg阶段对试验猪的日增重和饲料报酬影响不显著;屠宰体重对试验猪的屠宰率、pH值和肌内脂肪影响显著;采用综合选择指数就不同育肥及屠宰体重对试验猪的影响进行综合评定,结果表明,试验猪体重在85~90 kg结束育肥并屠宰时育肥性能及胴体肉品质的综合选择指数最大。 相似文献