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The Nutritive Value of Wood Molasses as Compared with Cane Molasses¹

New Hampshire Agricultural Experiment Station, Durham

ABSTRACT

The nutritive value of wood molasses was compared with cane molasses by means of 12 protein and energy digestion balance experiments with dairy heifers. Both the cane and wood molasses contained very little protein although the cane molasses contained 7 times more protein than the wood molasses. The wood molasses excelled the cane molasses in gross energy content by about 10 per cent on the dry basis.

The apparent digestibility of the protein in the ration was depressed when both the cane and wood molasses were added to the basal hay ration. When cane molasses was added, the decrease was 4.8 per cent, while with the addition of the wood molasses the digestibility of the protein was decreased by 12.1 per cent. However, almost all of this effect can be accounted for on the basis of increased metabolic nitrogen excretion in the feces. The digestibility as well as metabolizability of the energy was greater when both the wood and cane molasses were added to the basal hay ration but the differences were not significant. The metabolizable energy per gram of dry matter was essentially the same in both molasses.

The results of this experiment indicate that wood molasses is comparable to cane molasses as a feed for dairy cattle.

¹ Scientific Contribution no. 128 of the New Hampshire Agricultural Experiment Station.

² The authors gratefully acknowledge the cooperation of A. D. Littlehale of the staff of this Station under whose careful supervision the animals were kept.