Microbial protein synthesis and urea nitrogen concentrations in lactating dairy cows fed spineless cactus and different forages based diets

被引：0

作者：

Ferreira, Marcelo de Andrade ^{[1
,2
]}

da Silva, Renata Rodrigues ^{[3
]}

Ramos, Alenice Ozino ^{[3
]}

Chaves Veras, Antonia Sherlanea ^{[1
,2
]}

Silva de Melo, Airon Aparecido ^{[4
]}

Guimaraes, Amanda Vasconcelos ^{[5
]}

机构：

[1] Univ Fed Rural Pernambuco, Dept Zootecnia, Recife, PE, Brazil

[2] CNPq, Campinas, SP, Brazil

[3] Univ Fed Rural Pernambuco, Programa Posgrad Zootecnia, Recife, PE, Brazil

[4] Univ Fed Rural Pernambuco, UAG, Recife, PE, Brazil

[5] Univ Fed Rural Pernambuco, Curso Grad Zootecnia, Recife, PE, Brazil

来源：

REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE | 2009年 / 38卷 / 01期

关键词：

creatinine; purine derivatives; semi-arid; spot sample; EVALUATING CATTLE DIETS; PURINE DERIVATIVES; NET CARBOHYDRATE; RUMINAL PROTEIN; NUCLEIC-ACID; EXCRETION; SYSTEM; RUMEN;

D O I：

暂无

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Five Holstein cows were allotted to a 5 x 5 Latin square design with the objective of evaluating the microbial protein production, using the total excretion of purine derivatives (PD), obtained from spot urine collection, plasma and milk urea and nitrogen (N)-urea. The five treatments contained different forage sources: sugar cane bagasse (CB), tifton hay (TH), elephant grass hay (EH), sorghum silage (SS) and a mixture of sugar cane bagasse + sorghum silage (CBSS). The milk urea (10.98 mg/dL) and N-urea (5.11 mg/dL) concentrations were not influenced by the forage sources, such as plasma urea (28.10 mg/dL) and N-urea (13.09 mg/dL) concentrations. The urinary urea, N- urea, allantoin and PD excretions, the absorbed purine, N-microbial synthesis and milk allantoin concentration remained unchanged. The different forage sources in association with forage cactus did not change the microbial protein production.

引用

页码：159 / 165

页数：7

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