PERFORMANCE OF SOMALI BLACKHEAD SHEEP AND GALLA GOATS IN NORTHERN KENYA
PERFORMANCE OF SOMALI BLACKHEAD SHEEP AND GALLA GOATS IN NORTHERN KENYA
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DOI：
10.1016/0921-4488(90)90049-c
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发表时间：
1990-10-01
影响因子：
1.8
通讯作者：
FIELD, CR
中科院分区：
文献类型：
--
作者：
BLACKBURN, HD;FIELD, CR
对肯尼亚北部绵羊和山羊的生产性状进行了调查，包括母羊体重、产奶量、羔羊和羔羊的生长情况。对消耗的植物种类进行了粗蛋白(CP)和可消化有机物(DOM)的营养含量分析。1979年和1980年，绵羊饲料的平均DOM分别为47.2%和51.7%，CP分别为10.1%和8.7%。山羊日粮和绵羊日粮的平均CP和DOM相似。在90、120、150和180日龄，旱季出生的羔羊比雨季出生的羔羊重(P<；0.05)。1978年出生的羔羊在90-300日龄时比1979年和1980年出生的羔羊重(P<；0.05)。母羊体重和繁殖性能的年份差异显著(130.0只/只羔羊和118.8只/只羔羊)。对儿童生长的分析表明，从60日龄到300日龄，1978年出生的儿童明显比1979年和1980年出生的儿童重。年间母鹿体重差异不显著(P>；0.05)，年内筑月差异显著(P>；0.05)。与绵羊一样，第二年母羊的繁殖率降低(P<；0.05)。牛奶产量存在显著的年际和季节效应。
Characters of sheep and goat production in northern Kenya were investigated for female body weight, milk production, lamb and kid growth. Plant species consumed were analyzed for nutritional content of crude protein (CP) and digestible organic matter (DOM). Average DOM of sheep diets was 47.2 and 51.7% while CP was 10.1 and 8.7% for 1979 and 1980, respectively. Goat diets were similar to sheep diets in average CP and DOM. Lambs born in the dry season were heavier than those born in the wet season (P < 0.05) at 90, 120, 150 and 180 days of age. Lambs born in 1978 were heavier from 90 to 300 days of age than those born in 1979 and 1980 (P < 0.05). There were significantly year differences for ewe body weight and reproductive performance (130.0 vs 118.8 lambs born/ewe). Analysis of kid growth indicated that from 60 to 300 days of age, kids born in 1978 were significantly heavier than the 1979 and 1980 kid crops. No differences (P > 0.05) were found for doe weight between years; however, significant differences for month nested within year were found. As with sheep, doe reproductive rate was reduced (P < 0.05) in the second year. Significant year and seasonal effects were found for milk production.