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Effect of replacing alfalfa hay with a mixture of cassava foliage silage and sweet potato vine silage on ruminal and intestinal digestion in sheep
Author(s) -
Dang Hoang Lam,
Lv Renlong,
Obitsu Taketo,
Sugino Toshihisa
Publication year - 2018
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12925
Subject(s) - silage , digestion (alchemy) , dry matter , hay , agronomy , neutral detergent fiber , chemistry , rumen , zoology , biology , food science , fermentation , chromatography
This study aimed to investigate the effects of replacing alfalfa hay ( AH ) with a mixture of cassava foliage silage and sweet potato vine silage ( CSP ) (1:1 on a dry matter ( DM ) basis) on ruminal and intestinal nutrient digestion in sheep. Four wethers were fed a control diet containing 35% of AH and two treatment diets containing 15% and 30% of the CSP as substitute for AH at 1.5 times the metabolizable energy required for maintenance. Replacing AH with the CSP silage did not affect DM intake, whereas it linearly increased ( P < 0.05) the intake of ether extract and acid detergent insoluble nitrogen ( ADIN ). Increasing the CSP substitution linearly decreased ( P < 0.05) ruminal DM and neutral detergent fiber ( aNDF om) digestibility; however, it did not affect total tract aNDF om digestibility. The CSP substitution did not affect nitrogen (N) intake and duodenal total N flow, whereas it linearly increased duodenal ADIN flow ( P < 0.01) and decreased ruminal ammonia‐N concentration ( P < 0.01), and intestinal ( P = 0.08) and total N digestibility ( P < 0.01). These results indicate that replacing AH with the CSP reduced the ruminal N degradation as well as the digestion of ruminal aNDF om and intestinal N.