fn Partíal Fulfillnent - MSpace

Of the cereal grains, barley and especially
sorghun contain significanb amounts of tannins (thang
and Fuller, 19ó4; Eserun, 1968). the true nitrogen
digestibilities of 2Ç sources of barley, ranging in tannin
content from 0.55 to 1.23f" ïere nieasured on rats (Eggu¡n
and Christeasen, 1975). The tannin content was r,reasured
accordíng to AOAC (1965) procedures. The nitrogen content
of the 29 barley samples varied frorn 1.55 Lo 3.221ø. Therefore,
the relationship betwêen nitrogen digestibility and
content of nitrogen (which also affects nitrogen dige stibili-uy )
aná tannin was determined by use of a mulliple regression
equation, which was as follows: lÐ1 = 82.60 + 3.Sg
x N (Ø) - 6.27 x tannin (íá) (Eeeun and Christensen,
1975). For exaraple, barley containing 2.f nitrogen and, O.55,ii
tannin and barlel/ containing 2/. nlLrogen and, 1.23% tannin
will result in true nitrogen digestibilities of 86.9 and
ð¿. ^^ ^.4 /)o respecllvely.
. tr''Ihe at and rye, and to a lesser extent rice, oats
and corn were found. to contain a trypsin inhibitor (iaporte
-
and Tremolieres, 1!62). The anti-trypsin factor seems to
1TÐ,
of nitrogen in
bàr1ey.
true nitrogen
barley; tannin ciigestibility; N (ií): percentage
lit): percentage of tannin in
I6