Relative plant parts, chemical composition and in vitro gas production evaluation of different Watania corn hybrids silage

Relative plant parts, chemical composition and in vitro gas production evaluation of different Watania corn hybrids silage

Gaafar, H.M.A.1; W.A. Riad1; Ghada S. El-Esawy1 and M.E.A. Nasser2

1Animal Production Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
2Animal Production Department, Faculty of Agriculture, Alexandria University, El-Shatby, Alexandria, Egypt.

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) higher for W6 than that of W97 with insignificant differences with both W4 and W11. Gas production from the fermentation of soluble fraction (GPSF) of W6 and insoluble fraction (GPNSF) of W4 and W6 were significantly (P<0.05) compared to W97. The concentration of SCFA was significantly (P<0.05) higher for W4 and W6 compared to W97 and not 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) for W6 than that of W97, whereas were nearly similar for W4 and W11 and insignificantly (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) for both W4 and W6 compared to W97, whereas MP yield for W11 not significantly (P>0.05) differences with W4, W6 and W97.

Keywords: Corn hybrids silage, composition, gas production, energy content, microbial protein.

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Gaafar, H.M.A.; W.A. Riad; Ghada S. El-Esawy and M.E.A. Nasser. Relative plant parts, chemical composition and in vitro gas production evaluation of different Watania corn hybrids silage. American Journal of Agricultural Research, 2020,5:93.


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