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http://dx.doi.org/10.5713/ajas.2011.10191

The Effect of Nitrogen Fertilization to the Sward on Guineagrass (Panicum maximum Jacq cv. Gatton) Silage Fermentation  

Namihira, Tomoyuki (Tropical Biosphere Research Center, University of the Ryukyus)
Shinzato, Naoya (Tropical Biosphere Research Center, University of the Ryukyus)
Akamine, Hikaru (Subtropical Field Science Center, Faculty of Agriculture, University of the Ryukyus)
Nakamura, Ichiro (Faculty of Agriculture, University of the Ryukyus)
Maekawa, Hideaki (Tropical Biosphere Research Center, University of the Ryukyus)
Kawamoto, Yasuhiro (Faculty of Agriculture, University of the Ryukyus)
Matsui, Toru (Tropical Biosphere Research Center, University of the Ryukyus)
Publication Information
Asian-Australasian Journal of Animal Sciences / v.24, no.3, 2011 , pp. 358-363 More about this Journal
Abstract
To investigate the effect of nitrogen fertilization on the quality of tropical grass silage, guinea grass grown with 3 types of nitrogen fertilizers, namely, urea, ammonium sulfate, and compound fertilizer 804, at 2 fertilization levels, 0.5 and 2.5 kg $Na^{-1}$ (0.5 N and 2.5 N, respectively), was subjected to silage fermentation. Silage fertilized with 0.5 N showed butyrate-dominant fermentation, irrespective of the type of fertilizer used. On the other hand, fermentation of silage fertilized with 2.5 N was significantly affected by the type of fertilizer used; fertilization with ammonium sulfate and compound fertilizer 804 resulted in silage that contained a large amount of butyrate and no lactate; this silage was considered to be of a significantly low quality as compared with silage fertilized with 0.5 N. Among silage fertilized with 2.5 N, the desirable butyrate-free fermentation was found only in urea-fertilized silage, which had the best quality. Grass material fertilized with a high level of urea accumulated a relatively high concentration of nitrate nitrogen (0.22% dry matter). Our results presented here suggest that nitrogen fertilizer management could affect the quality of tropical grass silage and that a relatively high concentration of nitrate in silage may promote butyrate-free fermentation even in tropical grass silage.
Keywords
Guinea Grass Silage; Nitrogen Fertilizer; Nitrate Nitrogen;
Citations & Related Records
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Times Cited By Web Of Science : 0  (Related Records In Web of Science)
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