The effect of ensiling and haymaking on the concentrations of steroidal saponin in two Brachiaria grass species

Ciência Rural

Silva, Roberta Dias da¹  Lima, Flavia Gontijo de¹  Lee, Stephen Thomas²  Miyagi, Eliane Sayuri¹  Pfister, James Alan²  Fioravanti, Maria Clorinda Soares¹  Costa, Gustavo Lage¹ 

[1] Universidade Federal de Goiás, Goiânia, Brazil;United States Department of Agriculture, Logan, USA

关键词: haymaking;    hepatogenous photosensitization;    saponin;    protodioscin;    signalgrass;    silage;   

DOI  :  10.1590/0103-8478cr20141305

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Brachiaria (signalgrass) is now the most widely used tropical grass genus in Central and South America. However, Brachiaria spp. can cause hepatogenous photosensitization in livestock. Steroidal saponins, specifically protodioscin, present in Brachiaria spp. may be responsible for liver injury and subsequent photosensitization. The objective of this study was to determine the effect of ensiling Brachiaria decumbens and Brachiaria brizantha or making hay from Brachiaria decumbens on the concentrations of steroidal saponin in these grasses. Brachiaria grass had no detectable levels of the saponin protodioscin after 24 days of ensiling. In addition, in Brachiaria decumbens, the concentration of the protodioscin decreased 48% over the first three days after haymaking and then remained constant. These results suggest that livestock consuming Brachiaria either as silage or hay may have reduced risk of intoxication by protodioscin.

【 授权许可】

Unknown