This study examined the in ̄uence of dietary variation on the usefulness of urinary spot purine derivatives (PD) collected at three periods (8:00±9:30, 14:00±15:30 and 20:00±21:30 hours) as predictors of intake by cattle. Diets comprised teff (Eragrotis tef) straw, fresh and dried napier grass and fresh napier grass supplemented with 1.5 (as fed) of dry alfalfa hay. Variation in dry matter intak...

A digestion trial using cannulated lactating cows was conducted to evaluate the influence of barley grain processing on characteristics of ruminal fermentation and the site and extent of digestion. The experiment consisted in 4 periods and lasted 84 days. The total mixed rations contained 39.86% of grains and 42.90% of alfalfa hay and the rest of ration was composed mainly by cane molasses, fat...

Two digestion experiments were conducted to determine the effect of various levels of potato processing residue in feedlot diets on digestion of dry matter, gross energy, crude protein and starch. In Exp. 1, 10 Hereford steers (average weight 360 kg) were randomly allotted to one of five diets in which (1) 0, (2) 15, (3) 30, (4) 45 or (5) 60% of diet dry matter was provided by potato processing...

Twenty four primiparous and multiparous Holstein cows on early lactation, beginning five weeks postpartum, were used for four weeks to investigate the effects of supplemention of rumen-protected choline (RPC) or vitamin E on milk yield, milk composition, dry matter intake, body condition score and body weight. The cows were randomly assigned to one of the following treatments: I)no supplement (...

this experiment was carried out at agricultural research station of gorgan during summer 2006 to study the effects of corn and green gram intercropping on forage yield, and weed biomass. the experimental design was rcbd with twelve treatments and four replications. a local green gram and corn single cross 550 were the crops employed. the experimental treatments consisted of sole corn and sole g...

In the present study, feed and nutrient intake, body weight changes, digestibility rumen fermentation parameters were compared in cattle buffaloes. Seven (T1) seven buffaloes (T2) placed two groups based on employing completely randomized design. Experimental feeding form of total mixed ration (TMR) was carried out for 75 days having concentrate (C) roughage (R) 30C:70R. The daily intake dry ma...

given the important role of crop growth indices for explanation of cultivars yield differences in diverse environmental and agronomical circumstances, this experiment was conducted at research field of tarbiat modares university during 2007 growing season. experimental treatments were arranged in split-plot layout based on randomized complete blocks with four replications. in this research, sow...

The objectives of this research were to (1) determine the feed intake, digestibility, and energy utilization (2) estimate net value cassava chips consumed by lactating dairy cows. Four multiparous Holstein–Friesian crossbred cows at 139 ± 33 (mean SD) day in milk assigned according a 4 × Latin square design with four periods. treatments included diet substituted on 0%, 12%, 24%, 36% dry matter ...