UTILIZATION OF SOME ENSILED AGRICULTURE AND AGRO-INDUSTRIAL BY-PRODUCTS AS ROUGHAGE SOURCES IN RATIONS FOR LACTATING EWE | ||||
| Journal of Animal and Poultry Production | ||||
| Article 1, Volume 30, Issue 3, March 2005, Page 1317-1334 PDF (576.39 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2005.237962 | ||||
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| Authors | ||||
| R. I. El-Kady1; R. Salama2; A. H. Etman2 | ||||
| 1Dept.of Animal Production, National Research Center, Dokki, Giza, Egypt. | ||||
| 2Dept. of Animal Production, Faculty of Agriculture, El-Azhar University, Cairo. | ||||
| Abstract | ||||
| The effect of utilization of some agriculture by-products as potato tops and agro-industrial by-products as spinach stem and roots in making silage offered to lactating ewes on milk production and composition were investigated. Sixteen multiparous Barki ewe's in the 3rd and 4th seasons of lactation and of 48.0 + 0.46 kg average body weight were randomly divided into four nutritional groups (4 ewes each) and were offered silages made from some agricultural by-products in three groups with one group fed Berseem. In addition, four digestibility trials were conducted on 12 ewes at the end of the lactating trials (three ewes per each group). Concentrate feed mixture (CFM), at 2% live body weight was fed to cover maintenance requirements of lactating ewes. Silage types and Berseem fodder were offered ad-libitum. Results Obtained showed that: * Ewes fed on different types of silage increased their DMI by about 34.2, 44.7 and 56.6% for potato top silage (R2), spinach stem and roots silage (R3) and spinach stem and roots: potato top silage mixture (1:1) (R4) rations, respectively compared with the control Berseem fodder (R1) ration. * Daily milk yield of ewes fed on different type of silages increased by about 31, 35 and 22% for R2, R3 and R4, respectively compared with those fed on control ration. However, offered silages increased (P< 0.05) percentages of milk fat, lactose and gross energy content compared with Berseem fodder. The feed conversion efficiency, on (DM basis) was 6.81, 6.99, 7.33 and 8.76 Kg DMI/kg milk for R1, R2, R3 and R4, respectively. * Feeding different forms of silage significantly (P<0.05) improved almost all nutrients digestibility; DM by about 9.8, 19.1 and 13.9%; OM by 13.7, 18.2 and 15.8%; CP by 15.3, 38.3 and 33.7%; CF by 10.6, 19.1 and 14.8%; EE by 69.0; 40.5 and 43.4%; NFE by 13.2, 15.1 and 13.2% for R2, R3 and R4, respectively compared with the control ration. Higher feeding values of different forms of silage compared with the control ration were obvious. * Ruminal pH values for all groups at 4 hrs post feeding were decreased. However, ammonia-N and total VFA's concentrations were noticeably increased after 4 hrs of feeding different forms of silage compared with the control ration. * Total protein, albumin, globulin, creatinine, glucose, GOT and GPT were within the normal range and without significant differences among the different experimental groups. * Photochemical screening showed that ensiling spinach stem and roots, potato tops or a mixture of both (1:1) depressed the presence of some antinutritional factors such as saponins, glycosides, alkaloids and oxalate. Accordingly, it could be recommended to use potato tops and spinach stem and roots in making silage to be included in feeding lactating ewes without fearing adverse and economic effects on ewes milk production and its composition. | ||||
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