摘要
选择1日龄尼克红蛋公雏264只,随机分为6组,每组4个重复,每个重复11只,试验期42d.各组添加0%,0 1%尿素、0 2%尿素、0 4%尿素、0 3%柠檬酸、0 2%尿素+0 3%柠檬酸,研究尿素、柠檬酸及其复合物对雏鸡生长发育及血液生化指标的影响。试验结果显示:(1)添加0 1%尿素显著提高雏鸡期末体重(P<0 05),并趋于改善日增重、全期采食量及饲料转化率(P>0 05)。(2)与添加0 1%尿素相比,添加0 4%尿素显著降低期末体重、日增重、采食量(P<0 05),并趋于降低饲料转化率(P>0 05)。(3)添加0 4%尿素,显著提高血清尿素氮含量(P<0 05),显著降低血清总蛋白含量(P<0 05)。添加0 2%尿素+0 3%柠檬酸复合物显著提高血清尿素氮含量(P<0 05),但不影响血清总蛋白含量(P>0 05)。添加0 1%和0 2%尿素,对血清尿素氮无影响(P>0 05),而血清总蛋白显著降低(P<0 05)。结果表明:饲料中添加0 1%尿素对雏鸡生长具有一定的调控作用。
one day old chicks of Nike red eggs were randomly selected and divided into 6 groups with 4 repeats per group, 11 chicks per repeat and 42 experimental days. The effects of urea, citric acid and their compounds on chick growth and blood biochemical indices were studied with six different diets supplied for each group. These diets included base diet (A), A+0.1% urea(B), A+0 2% urea (C), A+0 4% urea (D), A+0 3% citric acid (E) and A+0 2% urea +0 3% citric acid (F). The results showed as follows: (1) Diet B could increase the chicks' body weight significantly ( P <0 05) and tended to improve the daily weight gain, feed intake and transforming efficiency ( P >0 05). (2)Diet D could decrease the body weight gain, daily weight gain and feed intake significantly ( P <0 05) and tended to reduce the feed transforming efficiency ( P >0 05) as compared with diet B. (3) Diet D could increase the content of serum urea nitrogen (SUN) and reduce the content of serum total protein (STD) dramitically. Diet F could raise the content of SUN, but had no effect on the content of STP. Diet B and diet C could lower the content of STP and had no effect on the content of SUN. These results demonstrated that the diet supplemented with 0.1% urea had certain regulations on chicks' growth.
出处
《云南农业大学学报》
CAS
CSCD
2003年第3期289-293,共5页
Journal of Yunnan Agricultural University
