| Titles |
|
English :
|
Effect of dietary energy level on : 1- digestibility and performance of growing Buffalo heifers
|
|
Arabic :
|
تأثير مستوى طاقة الغذاء على : 1- معاملات الهضم و الاداء الانتاجى لعجلات الجاموس النامية
|
|
| Abstract |
Twenty four growing buffalo heifers (7 month and 153 ± 6 Kg body weight) were allocated randomly and equally to one of three treatments of 8 heads each on the basis of age and weight. Animals received their allowance from the experimental rations according to Kearl (1982). Rations were iso - nitrogenous and with levels of dietary energy (80, 100 and 120 % TDN).
Body weight of each heifer was recorded biweekly until the study was completed. Treatment period lasted 12.2 months. Feed and fecal samples were collected at the last 3 days of the treatment period to determine the apparent total tract nutrients digestibility using acid insoluble ash as the internal marker. DM intake was significantly increased (P< 0.01) with high energy level (120 and 100 % TDN) than low energy level (80 % TDN). Daily gain, age at the onset of the first heat and age at first fertilized service of heifers fed high energy level was significantly (P < 0.05) better than those fed low energy level. Also, the heifers fed low energy level (80 % TDN) showed the highest DM consumed (P< 0.05) kg DM / kg gain compared to heifers either fed on normal or high energy levels (100 and 120 % TDN). In addition, the heifers fed ration containing 120 or 100 % TDN showed the highest TON consumed (P < 0.01) / kg gain compared to heifers fed on low energy level 80 % IDN. While, OCP conversion was not significantly affected (P < 0.05). Both the normal and high levels of energy (100 and 120 % TDN) groups were superior relative to the 80% TDN group. The animal group fed 120 % TDN level (R3) recorded the highest digestibility values for OM, OM, CP, EE and NFE as will as feeding values (TDN and DCP) compared to those fed either 100 or 80 % TDN level (Rland R2). While, CF digestibility was significantly improved (P < 0.01) for low energy level.
Key words: energy level, buffalo heifers, digestibility, puberty and performance.
|
| Publication year |
2004
|
| Pages |
43-53
|
| Organization Name |
Animal Production Research Institute (APRI)
|
| City |
القاهرة
|
| serial title |
Egyptian Journal Nutrition and Feeds
|
| Department |
Animal Nutrition Research Departement
|
| Author(s) from ARC |
|
| Agris Categories |
Animal feeding
|
AGROVOC
TERMS |
Animal nutrition.
Digestibility.
Energy.
Heifers.
Performance testing.
Water buffaloes.
|
| Publication Type |
Journal
|