The use of corn fodder, its silage or corn stover as an animal feed. 2. A comparison between the digestibility and protein's biological value of the three products

Soliman, S.M.; Abou Akkada, A.R.; Naga, M.A.; Habib, M.M.

Alexandria Journal of Agricultural Research 23(1): 21-24

1975


ISSN/ISBN: 0044-7250
Accession: 000557256

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Abstract
2. Three adult male Barki sheep with rumen fistulae in 1968 and 1969 and 3 without fistulae in 1971 were used to compare nutritive and biological value of the proteins in maize fodder, maize fodder silage and maize stover. The fodder was cut at 100 days, when the stems were still green. The silage was made by pressing fresh chopped forage into polythene bags and storing them in closed barrels for 2 months. The stover was prepared by drying the chopped fodder in the open air. Each trial lasted for 21 days, including a collection period of 7 days. Ensiling led to a decrease in crude fibre content, compared with the fresh fodder, whilst drying increased the fibre content. Crude protein was highest in fresh fodder, followed by silage and then stover. N-free extract was highest in silage, followed by fresh fodder, then stover. These are mean findings for the 3 years studied. DM intake for fresh fodder was highest, followed by silage and stover, and results for N intake and N retention followed the same pattern, as did digestion coefficients for all constituents measured. Although fresh forage seemed the most useful, any of these roughages would be much more beneficial as a summer feed than the wheat straw traditionally used in Egypt. In field trials at Alexandria in 1968-71, Barki rams were fed (a) fresh forage from 100-day-old plants of maize (leaves and stems containing 73 and 58% moisture, respectively), (b) maize silage or (c) air-dried maize stover. In (a), (b) and (c) CP contents were 7.12, 6.50 and 5.52%, CF contents 33.60, 30.62 and 38.46% and NFE 46.50, 49.20 and 42.38% of the DM, respectively. DM intake, digestibility and TDN were all highest in (a) and lowest in (c). Intake values were 1229, 1072 and 771 g/m2 body surface day for (a), (b) and (c), respectively.