Ruokintarutiinien merkitys naudoilla : kirjallisuustutkimus

vokKirjasto Aj-

Lypsykäyrän muotoa kuvaavien tunnuslukujen ja lypsykauden tuotosten toistuvuus Viikin karjassa

LaudaturtyövokKirjasto Aj-

Xylitol, polyol molasses and glucose in the diet of newborn calves: I. Effect on growth and some blood values

In a feeding trial with 18 calves, three carbohydrate additions were compared in a liquid milk replacer diet: glucose, xylitol and polyol molasses (PM). The average consumption of substrates was 41, 42 and 48 g dry matter of glucose, xylitol or polyol molasses per day. After one week of colostrum and whole milk feeding, liquid milk replacer was given 12 % of live weight. The trial lasted to the age of 5 weeks. Daily live weight gain was 452, 479 and 425 g in the glucose, xylitol and PM groups(n.s.), respectively. Intake of concentrates was greater in female than male calves (P < 0.05). There was no significant difference in the feed conversion rate between the groups: 1.83, 1.88 and 1.98 kg dry matter/kg live weight gain in the glucose, xylitol and PM groups, respectively. Venous blood samples were taken before the first feeding after birth, then 1, 2, and 4 days, and 1, 3 and 5 weeks after birth. Haemoglobin and haematocrit were higher in the glucose than in the xylitol and PM groups, and higher in female than male calves (P < 0.05). There were no differences between the groups in plasma glucose, calcium or magnesium contents. Plasma urea-N was lower in the xylitol than in the glucose group (P < 0.05). Plasma inorganic phosphorus was higher in the xylitol than in the glucose group on week one and three after birth, the difference being significant at 3 weeks of age (P < 0.05)

A polyol mixture and molasses-treated beed pulp in the silage based diet of dairy cows: III The effect on the utilization of minerals

The effect of sugar alcohol (polyol) mixture feeding on the utilization of Ca, Mg, Na, K and P was studied in a balance trial with 12 dairy cows. The cows were divided into 3 groups: Group I received a grain concentrate mixed with 26 % of polyoltreated beet pulp, Group II the concentrate mixed with 29 % of molasses beet pulp, and Group III only the grain concentrate. Cows were given 7—8 kg/d of concentrate, 2 kg/d of hay, and silage at almost ad lib. level. The intake of sugar alcohols was 484 g/d in Group I and total intake of sugars was 461, 736 and 435 g in Groups I, II and IIII, respectively. No polyols were secreted in the faeces, and in the urine only 0.7 % of the intake, most of which was xylitol, rhamnitol and arabinitol. Small amounts of polyols were also secreted in the urine of the molasses beet pulp group. There were no clear effects of polyol feeding on the apparent digestibility or utilization of minerals. However, the readily fermentable carbohydrates in the diet tends to increase the apparent absorption and utilization of magnesium. Secretion of potassium was significantly (P < 0.05) lower in the polyol beet pulp group than in the molasses beet pulp group

Puna-apila-, vuohenherne- ja nurminatasäilörehujen vaikutus maidon linoleenihappopitoisuuteen lypsylehmän ruokinnassa

ei saatavill

Peltonätkelmän, kuoritun esparsetin ja soijapulpan (okara) sulavuus sioilla

201

Mustasotilaskärpäsen toukkajauhon (Hermetia illucens) aminohappojen sulavuus porsailla

201

Mustasotilaskärpäsen toukkajauhon (Hermetia illucens) aminohappojen sulavuus porsailla

201

Sinisimpukkajauhon (Mytilus edulis) aminohappojen sulavuus porsailla

201

Nurmipalkokasvisäilörehuista maitoa

Nurmipalkokasvisäilörehuja voidaan käyttää lypsylehmillä yksinomaisenakin karkearehuna, mutta suositeltavampaa on käyttää niitä seoksina nurmiheinäkasvisäilörehun kanssa. Tällöin typen hyväksikäyttö paranee ja puna-apilan mahdolliset haittavaikutukset tiinehtymiseen poistuvat.vo