Due to climate change, periods of drought might be longer and occur more frequently, which challenges roughage production requires changed feeding dairy cattle by increasing the grain content diet. This study investigated effect diets with concentrate proportions up 91% dry matter on intake (DMI), milk production, enteric methane emission, rumen fermentation, bacterial community structure, nutrient digestibility, behavior Holstein Jersey cows. Twelve Danish 12 cows were fed ad libitum one 3...

Amino acids (AA) are the second most expensive component of broiler diets after energy, and therefore their excessive inclusion in can result significant increase feed cost. In addition to increased cost, intake AA by broilers results N excretion, which has negative impact on environment, welfare birds caretakers. Also, excretion water hence litter moisture, environment birds. Finally, production toxic compounds hindgut from post small intestinal digestion. Thus, methods reduce dietary CP...

The aim of this experiment was to measure enteric methane (CH4) emission and its relation with rumen digestion in dairy cows fed diets rich 1 the 2 carbohydrate sources, starch or sugar. rations were based on late first-cut grass-clover silage supplemented wheat (Wh), NaOH-treated (Wh+NaOH), sugar beet molasses (Mo), addition sodium bicarbonate (Mo+Bic). Wheat made up 35% dry matter wheat, respectively. Four fitted ruminal, duodenal, ileal canulae used a 4 × Latin square design. Nutrient...

Zusammenfassung Der Einsatz von oxidiertem Fischöl im Nerzfutter. 1. Einfluß auf die Verdaulichkeit der Nährstoffe und Einlagerung Fettsäuren in verschiedenen Geweben In einem Fütterungsversuch mit 18 ausgewachsenen, männlichen Pastelnerzen über Dauer 15 Wochen, wurde hoher Konzentrationen (55% metabolisierbaren Energie) frischem (200 and 400 mäqu. O 2 /kg Öl) das Wachstum sowie Fettsäureeinlagerung Leber Inguinalfett untersucht. Versuch schloß eine Bestimmung scheinbaren Verdaulichkeiten...

Abstract Rumen metabolism, microbial biomass synthesis and long chain fatty acid composition were studied in lactating cows fed at two levels of dry matter intake (L, 8.6 kg DM H, 12.6 DM) with 0, 4 6% added tallow the low feed level (L0, L4 L6) 2, high (H0, H2, H4 H6). Fibre digestibility was not significantly affected by addition. Increasing diet decreased total VFA concentration, ratio acetic to propionic ammonia concentration rumen. Crude fat content bacterial protozoal increased level,...

Abstract Fatty acid digestion was studied in three dairy cows cannulated the rumen, duodenum and ileum. Cows were fed encapsulated fat sources (vegetable oil, saturated fish oil). A preperiod diet with no added fat. In a graeco-latin design nine diets comprising levels of each fed. The contained 230 g fatty acids (FA), whereas other fats at about 550, 850 1150 FA/day. feed-ileùm true digestibility total FA 95, 47 86% for vegetable, fat, respectively. all independent level. C16:0 higher than...

Zusammenfassung Die Vitamin E‐Verwertung und ‐Retention sowie der E‐Status bei Nerzen unter nahrungsbedingtem oxidativen Streß Über eine Dauer von 8 Wochen wurden sechzehn männliche Scanblack‐Nerze in einem Fütterungsversuch einer Belastung mit großen Mengen an mehrfach ungesättigten Fettsäuren (25% des Futterfettes, Peroxidzahl: 473 mäqu O 2 /kg Fett) ausgesetzt. Das Futterfett basierte hauptsächlich auf Fischfett (gehackte ganze Makrele). Der Selengehalt Futters war ausreichend (0,33 ppm)....

Abstract Fatty acid digestibility was studied with five lactating cows fed three different fat sources in a 5 × latin square experiment. The treatments were 500 g of tallow, or 1000 saturated rich stearic (C18:0) (SARF) palmitic (C16:0) (PARF) per day. total daily fatty intake about 1100 rations the highest inclusion. digestibilities 76% for 74 and 64% SARF, respectively, 87 81% PARF, respectively. When compared to tallow predicted from model based on literature values, PARF had higher at...

Abstract Long-chain fatty acid metabolism in the digestive tract was studied lactating cows fed at two levels of dry matter intake (L, 8.6 kg DM and H, 12.6 DM), with 0, 4 6% added tallow low feed level (L0, L4 L6), 2, fat high (H0, H2, H4 H6). Mean balance from mouth to duodenum about zero when corrected for endogenous acids bile. However, regression analysis showed a microbial synthesis 68 g intake, trend which indicated declining de novo increasing diet. As mean 68% unsaturated C18 were...

Zusammenfassung Der Einsatz von oxidiertem Fischöl im Nerzfutter. 2. Einfluß auf das Wachstum und einige histologische, klinisch‐chemische hämatologische Parameter In einem Versuch mit 18 ausgewachsenen männlichen Pastelnerzen über eine Dauer 15 Wochen wurde der hohen Fischölkonzentrationen (55 % umsetzbaren Energie) Futter Gesundheit untersucht. Das Fischäl dem Basalfutter frisch oder nach vorheriger Oxidation (Peroxidzahl 200 400 mäqu. O 2 /kg Öl) zugegeben. Die Vitamin E‐Konzentrationen...

Glucose metabolism was measured during two consecutive years, 4 weeks postpartum, in a total of 36 yearling female mink, fitted with jugular vein catheters and raising litters six to seven kits. The dams were fed ad libitum from parturition on diets different ratios metabolizable energy (ME) derived protein:fat:carbohydrates (experiment 1: 61:37:2, 46:37:17, 31:37:32; experiment 2: 61:38:1, 47:52:1, 33:66:1). After 3 h fasting the 210 kJ ME experimental diets. Two hours postprandially single...

The effect of different and shifting dietary protein levels on hair growth the resulting pelt quality in mink was studied. Two groups pastel female were fed either 59% (high protein, HP) or 40% (low LP) metabolisable energy (ME) from during pregnancy lactation. Shortly after weaning, kits females LP diet put a new (21% ME). Kits HP randomly distributed to four experimental (34% ME) three these shifted diets with 21% at times June until September. Skin biopsies taken 4, 6, 23 and, 29 wk age....

Zusammenfassung Der Einfluß von hohen Mengen an Fischöl mit variierendem Oxidationsgrad auf Wachstum, Gesundheit und Reproduktion Nerzen In zwei Fütterungsversuchen jeweils 4 Gruppen männlicher weiblicher Nerze wurde der Einfluss hoher Gehalte stabilisierten Fischöls (Ethoxyquin, 300 γ.γ.m.) steigendem (frisch, Peroxidzahl 30, 70 100) untersucht. Männliche (15 Tiere/Versuchsgruppe) wurden weiblichen Tieren in Paaren gehalten erhielten Zeit Aufzucht des Wachstums ein Futter 12% Fishöl als...

Enteric methane (CH4) emission from cattle is strongly linked to the feeding regime and rumen microbial community structure. Here, we report that feed-induced CH4-reducing effects correlate with specific alterations in profile of microbiome-encoded carbohydrate-active enzymes predicted fluid metagenome. Rumen microbiome samples were obtained by mouth-tube sampling 12 lactating Holstein cows after 3-4 weeks three different concentrate-to-forage-ratio diets, i.e., standard, high, extremely...

The most critical challenge in early lactation is to meet the increasing energy demand for milk production, which results a negative balance (EB). objective of this study was evaluate productive performance and plasma metabolite responses lactating dairy cows fed diets supplemented with levels different fat sources. Diets were categorized as saturated fatty acid rich sources (SFAR), Ca-soaps acids (CaFA), polyunsaturated (PUFAR). There an interaction between crude level source dry matter...

Ensuring food production with low nitrogen (N) environmental emissions requires good quantitative knowledge of N flows in agricultural systems to monitor and use efficiency (NUE, the ratio outputs inputs). Our study quantifies main at subnational national scales Denmark Sweden from 2011 2020, calculating NUE for crop livestock associated nitrous oxide (N2O) ammonia (NH3) emissions. In Denmark, our results indicate an equal input organic (manure) synthetic fertilizers (230 213 kt y-1, 83 77...