Nutritive value of Tanzania grass for dairy cows under rotational grazing

Revista Brasileira de Zootecnia

Alberto Magno Fernandes¹  Fermino Deresz¹  Douglas Sampaio Henrique¹  Fernando César Ferraz Lopes¹  Leonardo Siqueira Glória¹ 

关键词: animal performance;    dairy cows;    tropical pastures;   

DOI  :  10.1590/S1516-35982014000800003

来源: SciELO

【 摘 要 】

A nutritional analysis of Tanzania grass (Megathyrsus maximusJacquin cv. Tanzânia was conducted. Pasture was managed in a rotational grazing system with a 30-day resting period, three days of paddock occupation and two grazing cycles. Ten Holstein × Zebu crossbred cows were kept within a 2-ha area divided into 11 paddocks ha-1. Cows were fed 2 kg of corn meal daily and performance was evaluated by weighing the animals every 14 days and by recording milk production twice a day. Nutritional composition of the Tanzania grass was determined from forage (extrusa) samples collected by esophageal fistulae from two animals. The nutritive value of Tanzania grass was estimated according to a modification of the CNCPS evaluation model. Tanzania grass supplemented with 2 kg of corn meal supplied 33.2% more net energy for lactation than required by the animals to produce 13.7 kg of milk day-1. Nevertheless, the amount of metabolizable protein met the daily protein requirement of the animals. Although the model used in the study requires adjustments, Tanzania grass has the potential to produce milk in a rotational grazing system.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License