الفهرس 
Ensiling processOnly 14 pages are availabe for public view
 |  | from | 251 |  |  |
| | | from | 251 | | |
Abstract
The current study was carried out at the Experimental Animal Nutrition Unit, Sakha Animal Production Research Station, Animal Production Research Institute, Agricultural Research Center, Ministry of Agriculture. This study consisted of two parts. 1- The first part: Evaluation of some corn variety and hybrids silages: Ten corn variety and hybrids included 1 Giza-2 variety, 5 single crosses (1 0, 124, 158, Watanya-4 and Pioneer-3062) and 4 third crosses (320, Neaina-47, Pioneer-3057 and Pioneer-Dahab) cultivated in different areas of Delta (Egypt) under practical conditions of farmers. Mostly harvested at dough stage of maturity, chopped and ensiled in plastic bags for two months. Ten digestible trails were carried out using three barki rams (for each trail) to determine the digestibility coefficients and nutritive values for different corn variety and hybrids silages. The obtained results could be summarized as follows: 1- The yield of forage and silage crop of single crosses increased by 10.77 and 10.55% compared to third crosses, respectively. Single cross Watanya-4 recorded the highest yield of forage and silage crop (7.27 and 6.94 ton DMIfeddan, respectively). Single cross 10 recorded the highest yield of grain (2.55 ton DM/feddan), while third cross Pioneer-Dahab recorded the highest grain content (40.30%). 2-Weight loss during ensiling was 0.20-0.37 ton DM / fed. Or 3.72-7.84 % of forage yield. While ensiling losses as apercentage of weight loss were 62.65-78.84 % for soluble carbohydrates, 3.63-7.50 % for protein and 8.95-1 1.25 % for fiber.