HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Berger, J.C.A. Articles by Webb, K. E. Search for Related Content PubMed Articles by Berger, J.C.A. Articles by Webb, K. E., Jr.

Feeding Swine Waste. III. Digestibility, Nitrogen Utilization and Palatability of Ensiled Swine Waste and Corn Grain or Orchard Grass Hay Fed to Swine¹

Virginia Polytechnic Institute and State University, Blacksburg 24061

Abstract

Three metabolism trials with 10 gilts each (average weight 95 kg) and one palatability trial with 30 gilts (average weight 86 kg) were conducted to determine digestibility, N utilization and acceptance of ensiled swine waste-ground corn grain mixtures (40:60 and 60:40 ratios). The following diets were fed: (1) basal (14% protein corn-soybean meal diet), (2) 75% basal and 25% of a 40:60 silage, (3) 50% basal and 50% of the 40:60 silage, (4) 75% basal and 25% of a 60:40 silage and (5) 50% basal and 50% of the 60:40 silage, on a dry matter basis. The digestibilities of dry matter, organic matter and crude protein decreased with increasing levels of the 40:60 and 60:40 silages. Fecal N excretion increased linearly (P<.01) as the level of silage increased. N retained as a percentage of intake and as a percentage of that absorbed tended to be higher for gilts fed diets containing 25% of the 40:60 or 60:40 silages and lower for those fed diets containing 50% of the above silages. In the palatability trial, differences in dry matter intake between treatment groups were not significant, on either an actual or grams/kilograms weight-⁷⁵/day basis. A second palatability trial was conducted with 36 crossbred gilts (average weight 91 kg) fed ensiled swine waste-orchardgrass hay mixtures (40:60 and 60:40 ratios). Diets fed were: (1) basal (16.4% protein corn-soybean meal diet), (2) 75% basal and 25% mixed hay, (3) 75% basal and 25% of the 40:60 silage, (4) 50% basal and 50% of the 40.60 silage, (5) 75% basal and 25% of the 60:40 silage and (6) 50% basal and 50% of the 60:40 silage, on a dry matter basis. Dry matter intake was lower for gilts fed diets containing 25 and 50% of the swine waste-orchardgrass hay silages than for those fed the basal diet alone, with a larger decrease for animals fed diets containing 50% of the ensiled swine waste-orchardgrass hay.

¹ Supported in part by a grant from the Virginia Agricultural Foundation.

² Present address: Pioneer Hi-Bred International, Inc., Microbial Products Division, West Jefferson St., Tipton, IN 46072.