Replacement of Tifton hay by spineless cactus in Girolando post-weaned heifers' diets

被引：17

作者：

Assis de Barros, Leonardo Jose ^{[1
]}

Ferreira, Marcelo de Andrade ^{[1
]}

Vieira de Oliveira, Julio Cesar ^{[2
]}

dos Santos, Djalma Cordeiro ^{[2
]}

Cariri Chagas, Juana Catarina ^{[1
]}

Souza Vitor Alves, Adryanne Marjorie ^{[1
]}

Moreira da Silva, Aghata Elins ^{[1
]}

Freitas, Wandemberg Rocha ^{[1
]}

机构：

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

[2] Inst Agron Pernambuco, Expt Stn Arcoverde, Arcoverde, PE, Brazil

来源：

TROPICAL ANIMAL HEALTH AND PRODUCTION | 2018年 / 50卷 / 01期

关键词：

Dairy cattle; Drought; Semi-arid; Crossbred; Performance; PROTEIN;

D O I：

10.1007/s11250-017-1415-4

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

This study aims to evaluate the effect of the Tifton 85 hay (Cynodon dactylon L. Pers) replacement by Orelha de Elefante Mexicana spineless cactus (Opuntia stricta [Haw.] Haw) on the nutrient intake and digestibility, growth performance, microbial protein synthesis, and efficiency of dietary nitrogen compound utilization in the diets of Girolando heifers. Twenty-four (3.5 months and 100 kg +/- 3.5 kg) Girolando heifers (5/8 Holstein x Gyr) were used and arranged in a completely randomized design. Dry matter, organic matter, crude protein, and neutral detergent fiber decreased linearly as a function of the levels of Tifton hay (TH) replacement by Orelha de Elefante Mexicana spineless cactus (OEM). The non-fiber carbohydrate intake and coefficient of dry matter digestibility increased, while the neutral detergent fiber (NDF) digestibility decreased linearly with the OEM inclusion. After evaluating the growth performance by observing weight gain and morphometric measurements, there were no significant alterations. The urinary volume, nitrogen balance as well as the efficiency of nitrogen retention had increased, while the urinary and plasma urea concentrations had decreased linearly with the OEM inclusion. The results obtained in this study show that Orelha de Elefante Mexicana spineless cactus should replace Tifton hay in post-weaned heifer diets.

引用

页码：149 / 154

页数：6

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