关于瘤胃中原生动物的有无对绵羊体重增加和羊毛生长影响的进一步研究。

Further studies on the effects of the presence or absence of protozoa in the rumen on live-weight gain and wool growth of sheep.

作者信息

Bird S H, Leng R A

出版信息

Br J Nutr. 1984 Nov;52(3):607-11. doi: 10.1079/bjn19840127.

DOI:10.1079/bjn19840127

Abstract

Lambs were given a diet of oaten chaff-sucrose-fishmeal (48:48:4, w/w) and either 60 (diet A) or 120 (diet B) g urea/kg sucrose in the diet. All animals were defaunated and half were refaunated. Each group of lambs (faunated and defaunated) was then divided into two groups and given diet A or diet B. Feed intake, wool growth and live-weight change were monitored over a 182 d period. The level of urea supplementation had no effect on wool growth or live-weight gain. Defaunated lambs gained live weight at a higher rate (9%, P less than 0.06) and grew 37% more wool (P less than 0.01) than the lambs with large populations of protozoa in their rumens.

摘要

给羔羊喂食燕麦糠-蔗糖-鱼粉（48:48:4，w/w）的日粮，且日粮中每千克蔗糖添加60克（日粮A）或120克（日粮B）尿素。所有动物都进行了除虫处理，其中一半进行了重新接种。然后将每组羔羊（接种和未接种）再分为两组，分别给予日粮A或日粮B。在182天的时间里监测采食量、羊毛生长和体重变化。尿素添加水平对羊毛生长或体重增加没有影响。与瘤胃中有大量原生动物的羔羊相比，除虫后的羔羊体重增加率更高（9%，P<0.06），羊毛生长量多37%（P<0.01）。