Effects of supplementary concentrate level and separate or total mixed ration feeding on performance of growing dairy bulls

Agricultural and Food Science

Arto Kalevi Huuskonen¹  Erkki Joki-Tokola¹  Maiju Pesonen¹ 

[1] MTT Agrifood Research Finland, Animal Production Research;

关键词: beef production;    concentrate supplementation;    feeding method;    growth;    carcass characteristics;    total mixed ration;   

DOI  :  10.23986/afsci.46460

来源: DOAJ

【 摘 要 】

A randomised complete block design was used to study the effects on animal performance of (1) the increasing level of supplementary concentrate with grass silage (GS), and (2) feeding GS and concentrates separately or as a total mixed ration (TMR). A feeding experiment comprised 32 dairy bulls with average initial live weight of 145 kg. The feeding treatments were: (1) GS (660 g kg-1 dry matter intake) plus medium level of rolled barley (330) offered separately, (2) GS (660) plus medium level of rolled barley (330) offered as TMR, (3) GS (330) plus high level of rolled barley (660) offered separately, and (4) GS (330) plus high level of rolled barley (660) offered as TMR. During the experiment (398 days) the bulls were fed ad libitum either GS or TMR. The increasing concentrate level increased energy intake, carcass gain and dressing proportion of the bulls but had no effects on carcass conformation or fat score. TMR feeding had no effects on carcass gain, dressing proportion, carcass conformation or fat score but increased dry matter and energy intake compared to the separate feeding.

【 授权许可】

Unknown