The composition of forage crops

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Abstract
The changes in composition of cocksfoot (Dactylis glomerata) cut at weekly intervals up to maturity, with and without applications of (NH4)2SO4, were detd. A water-soluble fructosan was found in this grass, the amt. being depressed by applications of N. The maximum content was far lower than in rye grass and occurred in the youngest herbage collected. The most mature samples still contained an appreciable amount of this constituent. Throughout development, the herbage was high in structural constituents (cellulose and lignin), the proportions being little affected by the treatments with N. There was no apparent relationship between the disappearance of fructosan and the formation of structural constituents, as was the case with rye grass. The composition of 2d growth herbage of equal age from the same plots was detd. The fructosan content of this material was lower than that of immature first growth but there was little difference in the structural constituents.

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