Intake, digestibility and nitrogen utilization by sheep fed with provenances of Calliandra calothyrsus Meissner with different tannin structure
作者： P. Avila , C. Lascano , J. Stewart
DOI:
关键词: Soil fertility 、 Tannin 、 Forage 、 Prodelphinidin 、 Soil water 、 Calliandra calothyrsus 、 Proanthocyanidin 、 Biology 、 Calliandra 、 Agronomy
摘要: A trial with sheep (housed in metabolic cages, and fitted ruminal duodenal cannulas) fed sun-dried forage of two Calliandra calothyrsus provenances (San Ramon —CIAT 22310 Patulul CIAT— 22316) harvested sites contrasting soil fertility was carried out to further define the biological significance different chemical structure tannin provenances. Six African-type were assigned one four treatments (T1: San grown Quilichao infertile soils, T2: T3: Palmira fertile T4: soils) arranged an Unbalanced Simple Crossover Design. Results showed that extractable tannins comprised mainly procyanidin subunits, whereas fraction composed largely prodelphinidin subunits. The DM intake digestibility greater (P<0.05) than Patulul. Intake also site acid soils. Absolute relative values escape dietary N Patulul, which is consistent laboratory results on astringency. Thus for first time we have evidence suggesting condensed tropical legumes can effect utilization by ruminants. fact vivo close agreement astringency from validates use tests screening quality traits.
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