【摘要】 作者于1983和1984年,分别按2×2双因子设计,用白来航型星杂288品系雏鸡进行两批试验,研究两钙和两总磷水平对雏生长发育和钙、磷表观存留量及存留率的影响。两批试验结果基本一致.根据雏鸡育成体重、饲料转化比、骨钙化与钙、磷表观存留量及存留率认为:0—5、6—13和14—21周龄雏鸡的适宜钙水平分别为0.8、0.7和0.6％,总磷水平相应为0.7、0.6和0.5％。更多还原

【Abstract】 Two experiments were conducted successively with White Leghorn type Shaver—288 chicks and designed according to 2 X2 two—factor method from 1983 to 1984 to study the effects of two calcium levels and two total phosphorus levels on the growth of chicks, apparent retention amounts and rates of the two calcium and total phosphorus levels.Results were the same by and large. A tea tative conclusion might bemade that the appropriate calcium levels for the ch.icks in 0—5,6—13 and 14—21 weeks are 0.8, 0.7 and 0.6%, and the suitable total phosphorus levels are 0.7, 0.6 and 0.5% from the liveweight of chicks in 21 weeks,utilization efficiency of feeds,bone calcification and the apparent retention amount and rate of the two calcium and phosphorus levels.更多还原