[Effects of gamma irradiation and sodium hydroxide of cell-wall constituents and digestibility energy of some agricultural residues]. [Arabic]
1996
Al Masri M.R.
The effect of various doses of gamma irradiation (0,100,150,200 kilo gry, Kgy) and different concentrations of sodium hydroxide on crude fibre (CF), cell-wall constituents (NDF,ADF,ADL), in vitro organic matter digestibility (IVOMD), gross energy (GE), in vitro digestible energy (IVDE) of wheat straw (W.S) cotton seed shell (C.S.S), peanut shell (P.S), soybean shell (SB.S), extracted olive cake (O.C.E.) and extracted sunflower of unpeeled seeds (S.U.E) were investigated. Results indicated that NaOH in the concentrations at (4 and 6) had significant effects on the CF content of W.S and P.S, E.U.E, SB.S, C.S.S,O.C.E, respectively. Treating S.U.E, W.S and all other residues with NaoH (2.4 and 6) respectively, decreased the NDF level. Irradiation dose of 200 KGY decreased CF for all residues, and it reduced the NDF for S.U.E. and SB.S. however,lower irradiation dose (150 KGY) was good enough to reduce the NDF for W.S, C.S.S, P.S and O.C.E. combined treatment resulted in better effects in reducing the concentrations of the cell-wall constituents. The digestible energy values (kj/kg DM) increased by 1120,1 220,2110 (W.S); 620 , 830 ,1000 FOR P.S; 240 , 500 , 580 for O.C.E; 500, 850, 870 for S.U.E; 550 ,1060 , 1200 for SB.S and 1260,1710,2070 for C.S.S using 100, 150, 200, KGy respectively, in comparison to unirradiated controls. Also, the IVDE values (kj/kg DM) increased by 560, 1050, 1590 for W.S; 310, 460, 650, for P.S; 170,760,1530 for C.S.S; 450, 990,1190 for O.C.E. using 2, 4, 6 NAOH respectively, in comparison to controls. No changes in the IVDE values for S.U.E and SB.S. combined treatment resulted in an even better increase in the digestible energy, except S.U.E and SB.S.
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