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Stage of Maturity of Corn at Time of Harvest for Silage and Yield of Digestible Nutrients^{1, 2,}

Department of Animal Sciences, Purdue University, Lafayette, Indiana

J. R. Reedal and C. B. Knodt

Harvestore Division, A. O. Smith Corporation, Arlington Heights, Illinois

ABSTRACT

Routine digestion trial technique was employed to determine the comparative digestibility of each harvest of corn silage, starting in the early dough stage (101 days postplanting) and extending through winter for as long as 385 days postplanting. Harvests were made at biweekly or monthly intervals. Both years' data demonstrate a relatively long period (from 70 to 84 days) in which maximum yields of digestible dry matter per hectare can be harvested for silage. In Experiment One, a period of 84 days from September 7 through November 30 yielded maximum levels of digestible dry matter per hectare; in Experiment Two, the 70 days from September 6 through November 15 yielded maximum levels. Stage of maturity of the corn plant per se did not determine the latest date at which the corn plant can be harvested to yield maximum dry matter per hectare, since the per cent of digestbility of the harvested material changed very little from first harvest to the last.

¹ Journal Paper no. 3220, Purdue University Agricultural Experiment Station, Lafayette, Indiana.

² The research reported in this paper was supported in part by a grant-in-aid from the Harvestore Division, A. O. Smith Corporation, Arlington Heights, Illinois.

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