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Influences of Northern Leaf Blight on corn silage fermentation quality, nutritive value and feed intake by sheep

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This study examined the differences between non-inoculated (control) corn and Northern Leaf Blight (NLB)-damaged corn (inoculated corn); dry matter (DM) yield, silage fermentation quality, nutritive value and feed intake by sheep were compared. Leaf, stem and grain dry weights and gross yield of inoculated corn were significantly (P < 0.05) decreased compared with control corn. The contents of water-soluble carbohydrate and nitrogen-free extract (NFE) were decreased in inoculated corn compared with control corn. Silage made from both inoculated and control corn showed good fermentation quality. The digestibility of DM, organic matter, ether extract, NFE, and energy of silage made from inoculated corn were significantly (P < 0.05) lower, and contents of total digestible nutrients (TDN) and digestible energy (DE) were also significantly (P < 0.05) lower compared with silage made from the control corn. DM intake showed no significant discrepancy between the two types of silage. TDN and DE intakes from inoculated silage were significantly (P < 0.05) lower compared with control silage. From the above results it was shown that NLB caused a decrease in DM yield and NFE content in corn and a decrease in the nutritive value and feed intake of silage.
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Keywords: corn silage; feed intake; fermentation quality; northern leaf blight; nutritive value

Document Type: Research Article

Affiliations: 1: Faculty of Bioindustry, Tokyo University of Agriculture, Abashiri, 2: Hokuren Federation of Agricultural Cooperatives, Technical Research Institute of Livestock and Grassland Science, Kunneppu, and 3: Pioneer Hi-Bred Japan Co., Ltd, Hokkaido Branch, Kitami, Hokkaido, Japan

Publication date: August 1, 2010

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