Open AccessA comparison of untreated and formaldehyde-treated barley distiller’s solubles and rapeseed meal as protein supplements in dairy cows given grass silage ad libitum
Author(s) -
Pekka Huhtanen,
Hannele Khalili,
Matti Näsi
Publication year - 1991
Publication title -
agricultural and food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.347
H-Index - 35
eISSN - 1795-1895
pISSN - 1459-6067
DOI - 10.23986/afsci.72410
Subject(s) - silage , rapeseed , dry matter , latin square , meal , zoology , chemistry , soybean meal , formaldehyde , food science , agronomy , biology , fermentation , rumen , biochemistry , raw material , organic chemistry
Twenty Friesian cows in four pens were arranged in a 4 x 4 Latin square experiment with 4 wk experimental periods to evaluate the effects on feed intake, milk yield and milk composition of treating barley dried distiller’s solubles (DDS) with a formaldehyde reagent, and to compare DDS with rapeseed meal as a protein supplement in dairy cows given a grass silage-based diet. The control diet (C) consisted of grass silage ad libitum fed with 8.5 kg/d of concentrate based on barley, oats and barley fibre (250, 250 and 500 g/kg dry matter (DM)). In three other diets 1.5 kg/d of the basal concentrate was replaced with rapeseed meal (RSM) treated for reduced ruminal degradability, 1.5 kg of untreated DDS (UDDS) or 1.5 kg of DDS treated with formaldehyde reagent at the level of 15 l/t (TDDS). On average, protein supplementation increased silage and total DM intake by approximately 0.5 kg/d (P>0.05). Milk yield (P