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A Study of the Crude Fiber and Nitrogen-free Extract Fractions of Orchard Grass Hay and the Digestibility of Some of the Constituents by Milking Cows¹

Bureau of Dairy Industry, U. S. Department of Agriculture, Washington, D. C.

ABSTRACT

Certain limitations of the widely used system of feedstuffs analysis inaugurated by Henneberg and Stohmann (22) undoubtedly have been recognized since the method was first proposed. The value and usefulness of this system of analysis also has been recognized and demonstrated through many years accumulation of results on a wide variety of feed materials. The extensive compilations of feed composition and digestibility data by Morrison (37) and Schneider (45) are a tribute to the past and present usefulness of the Henneberg system of feed analysis. The studies of Axelsson (3, 4, 5, 6, 7), Dijkstra (12), Duckworth (13), I-tallsworth (20), Homb (24, 25), Jarl (26, 27), Lancaster (30), MeMeekan (35), Nordfeldt et al. (38), and Olofsson (41) all indicate definite value in determining the crude fiber content of feeds since the high negative correlation between the crude fiber content and the digestibility and feeding value of a feed certainly justify the continued use of the crude fiber determination in the absence of a more desirable scheme of analysis.

¹ From a portion of a thesis presented by the senior author to the Graduate School of Michigan State College in partial fulfillment of the requirements for the Ph.D. degree.