Potato Meal Research Articles

Diets for growing pullets containing unusual ingredients and varying concentrations of cereals, including no cereals

1. Growing pullets (Shaver 288) were fed on diets containing about 150 or 100 g protein/kg and 800, 600, 300 or 0 g of a mixture of equal parts of wheat and barley, from 12 to 20 weeks of age. 2. Varying mixtures of dried poultry manure, dried grass, dried potato meal, poultry offal meal and tallow were substituted for the cereal portion, so that calculated metabolisable energy values and methionine and lysine concentrations were constant within each protein series. 3. Within the 150 g protein/kg series, body weight at 20 weeks of age was similar for diets containing 800, 600 and 300 g/kg cereal whereas with the cereal‐free diet body weight was depressed by 10%; with the latter diet sexual maturity was also delayed by nearly 4 d though subsequent egg production was unimpaired. 4. Within the 100 g protein/kg series, body weight at 20 weeks of age and subsequent egg production, calculated either to a fixed age or for a given time spent laying, were depressed by diets containing 300 or 0 g cereal/kg, compare...

埋草の生化學の研究

The material of silage was Astragalus sinicus L. The additional substances used in the present experiment were A. I. V., -acid, DEFU-solution, formic acid, common salt, saltpeter, bleaching powder, salicylic acid, carbon disulphide, formic acid with formalin, wheat bran, rice bran, corn meal, rice straw meal, sweet potato meal, potato, and grated sweet potato. The most excellent silage was made by the addition of formic acid. Formic acid with formalin is considerably effective within the range of the quantity of the present experiment, but in some measure inferior to formic acid alone and mineral acid. In the case of ensiling the material of high moisture content, it is advantageous that the bottom of a silo would be filled with rice straw meal or chopped rice straw as basal layer in order to absorb the juice exuded from the material. Moreover, a good silage may be obtained also from this rice straw meal.

The Value of Winter Pasture and Sweet Potato Meal for Lactating Dairy Cows

Summary Fifteen dairy cows of the University herd were used to study the value of winter pasture and sweet potato meal for lactating dairy animals during the winter of 1947. The project was conducted for three 28-day periods in accordance with the latin square design (1, 19). Analysis of variance was employed in analyzing the milk, butterfat and flavor data. The cows that were on winter grazing consumed approximately 46 per cent less dry roughage and produced 15.6 per cent more milk and 18 per cent more butterfat than did the animals that were dry-lot fed. These differences in yields were highly significant. The mean flavor scores of the afternoon milk samples were 36.2, 37.6 and 36.9 when the cows were fed ration B (containing pasture and corn), ration C (containing dry roughage and corn) and ration D (containing dry roughage and sweet potato meal), respectively. The differences in the flavor scores of the milk from cows fed rations B and C were statistically significant. The differences in the flavor scores of the milk from cows fed rations C and D were non-significant. The differences in the mean flavor scores of the morning milk samples from cows fed each of the rations were non-significant. There was no significant difference in the amount of milk and butterfat produced or in the flavor score of the milk when the cows were fed a concentrate mixture consisting of 30.2 per cent of either corn or sweet potato meal. The animals ate one ration just as readily as the other. The sweet potato meal did not cause an excessive or objectionable laxative effect upon the digestive system of the cows.

Sweet Potato Meal versus Ground Corn in the Ration of Dairy Cows

Summary A comparative study of the effect of ground snapped white corn and sweet potato meal on the liveweight and milk and butterf at production of dairy cows was conducted during the spring and summer of 1946. Analysis of variance revealed no significant differences in the milk and butterfat production or in the liveweights of cows when the sweet potato meal or corn constituted 36 per cent of the concentrate mixture. The sweet potato meal was as palatable as the ground corn when each of these concentrates constituted 36 per cent of the concentrate mixture. No excessive or objectionable laxative effect upon the digestive system of the cows was noted when they were fed the sweet potato meal mixture. The cows fed the sweet potato meal had a sleeker, brighter hair coat than did those fed the corn ration.

Further investigations of the feeding value of artificially dried potatoes: the composition and nutritive value of potato cossettes, potato meal, potato flakes, potato slices and potato dust

The present account is a sequel to an earlier publication on the composition and feeding value of potato cossettes and meal. It deals with the composition, digestibility and nutritive value for pigs and ruminants of potato flakes and slices, theresults of a large-scale pig-feeding trial with potato slices and the composition and value for pigs of potato dust, a by-product of the manufacture of potato slices. Details of the processes of production of these various dried potato products are included in the text.

Agriculture in Northern Ireland

ADDRESSING a meeting at Ballyclare, Northern Ireland, Mr. J. F. Gordon, the Northern Ireland Minister of Labour, said that during the present year the farmers of Northern Ireland have surpassed all previous records in the production of food. They have increased land cultivation by 100 percent, and obtained an agricultural turnover during the year of £44,000,000. After feeding the people of Northern Ireland and the troops stationed there the farmers have sent about £10,000,000 worth of food, including 360,000,000 eggs, to swell the larder in Great Britain. The Northern Ireland Ministry of Agriculture has pushed ahead with a scheme of potato processing plant, and it is hoped that nine factories will be completed in time to deal with the 1942 surplus crop, converting it into potato meal for animal feeding and into potato for human consumption.

The composition and digestibility, when fed to pigs and sheep, of potato cossettes and potato meal

Artificially dried potatoes are being marketed in this country at the present time in two grades, known as potato cossettes and potato meal. “Chat” potatoes are first washed in water tanks provided with revolving paddles and are then elevated into a machine that pulps them into pieces about the size of fingers. The resulting cossettes enter the drier directly from the pulper, forming a layer about 4 in deep. The wet material passes on an endless conveyer, consisting of a drying belt of perforated sheet metal, through three zones of temperature. The hot-air current has a temperature of 250–260° F. in the first stage and 180–200° F. in the third. The dried cossettes, which are suitable for feeding to sheep and cattle, may be ground to potato meal for use in the rations of pigs.