|
Effects of dietary levels of fresh cassava pulp in dairy cattle dieton productive performance and keeping quality of raw milk |
|---|---|
| รหัสดีโอไอ | |
| Creator | 1. Supreena Srisaikham 2. Naoki Isobe 3. Wisitiporn Suksomba |
| Title | Effects of dietary levels of fresh cassava pulp in dairy cattle dieton productive performance and keeping quality of raw milk |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2561 |
| Journal Title | Songklanakarin Journal of Science and Technology |
| Journal Vol. | 40 |
| Journal No. | 2 |
| Page no. | 278 |
| Keyword | fresh cassava pulp, lactoperoxidase activity, keeping quality, microbial counts, lactating dairy cows |
| URL Website | http://rdo.psu.ac.th/sjstweb/index.php |
| ISSN | 0125-3395 |
| Abstract | This research aimed to study the effects of supplementation at three levels of fresh cassava pulp (FCP) in theconcentrate diet of dairy cows: 1) 0 kg/d, 2) 3.5 kg/d (35 ppm hydrogen cyanide [HCN]), and 3) 7.0 kg/d (70 ppm HCN). Theeffects studied were productive performance, milk yield, milk composition, and milk quality. Twenty-four Holstein Friesiancrossbred lactating dairy cows were blocked by lactation first and then stratified random balanced by days in milk, milk yields,and body weight. Cows were assigned into randomized complete block design and divided into three groups of 8 cows each. Allcows were individually fed 21% crude protein concentrate together with ad libitum fresh grass and FCP according to thesupplemented treatments. The results showed that the total HCN content intake increased when the level of FCP supplementationwas increased. The supplementation of FCT at either 3.5 or 7.0 kg/d FCP had no negative effects on milk yield and milkcomposition. Milk thiocyanate concentration, lactoperoxidase (LP) activity, and the keeping quality of milk were increased bysupplementation of FCP at 7.0 kg/d and decreased the somatic cell counts, standard plate counts, coliform counts, psychrotrophiccounts, and thermophilic counts. The present study suggested that supplementation of FCP at either 3.5 or 7.0 kg/d may beassociated primarily with increased efficiency of antibacterial activity of the LP system in raw milk thus improving the milkkeeping quality, In addition, the supplementation at either 3.5 or 7.0 kg/d of FCP possibly decreased the incidence of mastitis inlactating dairy cows. |
