一些实验表明最早在18日龄免疫是有效的。
A few showed active response to vaccination as 18 days of age.
雏鸟在15日龄时已能随雌鸟上同一树夜栖。
The chicks roosted in same trees with females at 15 days after hatched.
哺乳公猪于不同的日龄去势，至断奶时其增重效果不同。
The results of weight rise in sucking male pigs were different according to the different ageinday of castration.
随着叶片日龄的增加，相对取食量和近似消化率有明显增大。
The relative consumption rate (RCR) and the approximate digestibility (AD) increased with the leaf age.
断奶日龄与断奶后仔猪生长发育和母猪生产性能发挥密切相关。
The weaning ages are closely related to the growth of piglets and performance of sows.
将15日龄雏鸟移出巢外，观察了亲鸟的喂雏方式和系列动作。
The feeding way and a series of action were studied by moving the 15-day nestlings from their nests.
本试验选用190日龄海兰褐蛋鸡(128只)，随机分为四组。
In this test 128 Hailanhe layers aged 190 days were chosen and randomly divided into four groups.
味蕾的大小随仔鱼日龄的增加而增大，其总数随鱼个体长大而增多。
The size and the number of the sense buds increased as young fish grew.
以8龄若虫为研究对象，发现其再生临界期为20 ~26日龄。
With 8th instar nymphs, the critical period for regeneration was from 20 to 26 days-old.
各日龄组甲状腺滤泡的变化和甲状腺分泌的含量变化与T4的波动相一致。
The fluctuations of thyroid follicles and secretion of thyroxine are in keeping with that of T4.
同一日龄攻毒的试验雏鸡中，以胚胎免疫组对阻止MD肿瘤形成的效果最佳。
The embryonally vaccinated chickens were most effective for preventing MD tumor formation when challenged at the same day.
本文用放免法分别测定27日龄到61岁各年龄组男女性血清铁蛋白正常值。
The paper reports the normal value of serum ferritin in people aging from 27 days to 61 years old, measured by radioimmunoassay.
但14日龄时，血浆和肝脏中的蛋氨酸含量随日粮蛋氨酸水平的提高呈上升趋势。
But the methionine level in blood plasma and liver had trend of rise with increasing of methionine level in the diet on 14 day-old.
初级毛囊的发育在胎儿期135日龄时已完成，而次级毛囊发育直至出生后6月龄。
All primary follicles matured at the age of 135 days in the foetal period and secondary follicles developed until 6 months after birth.
结果表明，60日龄仔猪数、20日龄窝重和初生窝重，是影响断奶窝重的重要因素。
Results show that 60—day litter size, 20—day litter weight and litter weight at birth are important factors influencing weaning weight of litter.
目的对1日龄和20周龄的BWEL -SPF鸡的各项生理指标进行测定和比较。
Objective Physiological values of BWEL-SPF chickens of 1 day old and 20 weeks old were measured and compared.
掌握这种病在哺乳仔猪当中的发病日龄，在此日龄前3 -4天注射长效的青霉素。
Identify the onset of disease in sucking pigs and inject 3 to 4 days prior to this to prevent disease, with long-acting penicillin.
结果正常情况下，海马和皮质部位GLUT1和GLUT3的合成量随日龄增加而增高。
Results There was a linear enhancement in the synthesis of GLUT1 and GLUT3 with the increase of day age.
猪十二指肠AENE阳性细胞数量在3日龄及20日龄均极显著增加（P<0 01）。
The number of AENE-positive cells in porcine duodenum increased significantly (P<0.01) at 3 and 20 days.
此外，在科学喂饲的基础上，结合微电脑自动控制提出以日龄为基准的全封闭管理模式。
Moreover, on the basis of scientific feeding and automatic control, a whole course management way based on hens growth period is developed.
仔鱼对饵料的选择随着日龄的增加而变化，同时与饵料的大小、种类、密度等因素有关。
Food selection which varies with larval days increasing, is related to food size, species and density.
疾病通常由日龄较大的猪感染给日龄较小的猪。并且，最危险的感染源是新近染病的猪只。
Infection is generally passed from older to younger pigs. Also, the greatest generators of infection are animals which have themselves been recently infected.
结果显示，用9日龄鸭胚接种明显优于其他日龄的鸭胚，抗原收获量及血凝价均达到较高水平；
The results showed that the harvest fluid volume and hemagglutination titer of9days duck embryos were better than those of other age embryos.
结果表明：绍鸭对食入的CP的氮存留率显著（P＜0．05）受日龄及伺粮CP水平的影响。
The results showed that the age of Shaoxing ducks and dietary CP level significantly affected the CP retention ratio(p <0.05).
在出口量占全部禽肉产量30%的巴西，作为潜在产量变化早期预警指标的日龄鸡苗价格大幅度下降。
In Brazil, where exports account for approximately 30 percent of total poultry output, the price of day-old chicks, an early warning indicator of potential production changes, is down sharply.
以42日龄AA肉鸡的胸肉为样品，采用固相微萃取气质联用法分析了AA肉鸡的挥发性香气成分。
Volatile flavour compounds in the breast meat of 42-day-old AA chicken were analyzed by headspace solid phase microextraction(HS-SPME) combined with GC/MS method.
鸡胚角膜上皮组织离体培养试验表明，小鼠表皮生长因子对10日龄鸡胚角膜上皮组织有显著的增殖效应。
In vitro culture of corneal epithelium of 10 days chick embryonic eyes showed that a prominent effect of cells proliferation induced by epidermal growth factor (EGF) of mouse.
该员工含着泪水对死于一日龄的雏鸡说：“这好像一个孩子的母亲杀了她”-家禽饲养妇女解释他们的感受。
The employees are putting to death one-day old chickens with tears. "it's as if a mother killed her child", - poultry-women explain their feelings.
方法应用超声波和临床方法前瞻性、双盲、对比研究连续出生的1 ~3日龄的184例新生儿肝脏大小。
Methods We measured the liver size in 184 cases by sonographic and clinical method with a double-blind design at 1 ~ 3 days of life.
方法应用超声波和临床方法前瞻性、双盲、对比研究连续出生的1 ~3日龄的184例新生儿肝脏大小。
Methods We measured the liver size in 184 cases by sonographic and clinical method with a double-blind design at 1 ~ 3 days of life.
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