Abstract
Four Commercial corn hybrids included 3 white hybrids, single crosses (SC) Watania 4 (W4) and Watania 6 (W6) and three-way cross (TWC) Watania 11 (W11) and 1 yellow hybrid (SC) Watania 97 (W97) were cultivated at 30 thousand plants per feddan, harvested at 92 days, chopped and ensiled in plastic bags for 35 days. Results revealed that W6 showed the highest ear content (36.60%), W97 the highest stems content (52.47%) W11 had the highest leaves content (18.65%). Watania 11 showed higher CP content and W97 had higher CF and fiber fractions content, while W6 had higher contents of EE, NFE and NFC in comparison with the other hybrids. Gas production at different incubation times as well as gas production from the immediately soluble fraction (a), insoluble fraction (b) and soluble and insoluble fractions (a + b) as well as the gas production rate constant for the insoluble fraction (c) values were significantly (P 0.05) different with W11. The predicted dry matter intake (DMI) and organic matter digestibility (OMD) of corn silage were higher significantly (P 0.05) different with both W6 and W97. The predicted metabolizable energy (ME, Mcal/kg DM) and net energy (NE, Mcal/kg DM) contents were nearly similar for the different corn hybrids silage without significant differences (P>0.05). Microbial protein yield (MP) was higher significantly (P 0.05) differences with W4, W6 and W97.
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