Date of Graduation

12-2020

Document Type

Thesis

Degree Name

Master of Science in Animal Science (MS)

Degree Level

Graduate

Department

Animal Science

Advisor/Mentor

Kegley, Elizabeth B.

Committee Member

Powell, Jeremy G.

Second Committee Member

Coffey, Kenneth P.

Third Committee Member

Gadberry, Shane

Keywords

Edamame; Inoculant; Ruminant nutrition; Silage; Supplemental Feed

Abstract

Use of organic waste material by ruminant animals from food processing operations potentially reduces costs and reduces environmental issues from disposal of these residues. Therefore, 2 experiments were conducted to evaluate the storage and feeding value of residual from edamame soybean processing for ruminant animals. Two types of waste streams, waste during harvest time and waste from processing stored material, were ensiled (on a laboratory scale) using various methods and effects on post-ensiling nutritive value were examined. Material from both waste streams were ensiled either without wilting or after wilting; each moisture level was ensiled with and without an inoculant. Pre-ensiled processing waste material averaged 55 ± 4.5% NDF, 39 ± 3.3% ADF, 11 ± 2.4% CP, and 8 ± 2.6% ash (average of material from 4 trips ± SD). For harvest waste, there was an inoculant by ensiling dry matter (DM) interaction (P = 0.05) for post-ensiling pH. Recoveries of DM after ensiling of the harvest waste tended (P = 0.06) to be greater with the inoculant (92.6 ± 1.41 vs. 88.5% ± 1.41). Additionally, wilted material ensiled with and without inoculant (average of 3 trips = 29.7% DM with inoculant and 28.5% DM without inoculant) from the waste from the processing of stored material were evaluated for post-ensiling intake, total tract digestibility (DM, NDF, ADF), and nitrogen balance using sheep offered silage produced in 167 L plastic barrels. Dorper crossbred ewes (n = 18; ages 2 to 3 years old; 55 ± 1.2 kg BW) were assigned randomly within a block to treatments within a trip, then assigned to a barrel of silage. Dry matter digestibility was not affected (P = 0.98) by inoculant and averaged 55.7 ± 0.66%. Ewe average daily gain for the 17-day trial tended to be greater (P = 0.08) for the ewes offered the silage without inoculant (0.18 ± 0.05 vs. 0.04 ± 0.05 kg/day). Overall, the use of edamame waste as silage for feeding and ensiling as a form of storage shows potential.

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