Nutritional value and fermentation characteristics of silage made from hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2) in different months during the year

Michal Rolinec, Dzhamal Rakhmetov, Daniel Bíro, Miroslav Juráček, Milan Šimko, Branislav Gálik, Ondrej Hanušovský

Abstract


Article Details: Received: 2018-07-31 | Accepted: 2018-10-18 | Available online: 2018-09-31

https://doi.org/10.15414/afz.2018.21.03.129-134

The aim of this study was to determine the nutritive value and fermentation parameters of silage made from hybrid Rumex patientia L. x Rumex tianschanicus A.Los (Rumex OK 2). Silages were made in months September, October and November of the year 2017 and next in April and May of the year 2018. In each month two variants were analysed, one without additives and second with an addition of 1% of dried molasses to wilted Rumex OK 2 plants. After 5 weeks fermentation in hermetic sealed plastic bags at temperature 20°C the concentration of nutrients and parameters of fermentation were analysed in average samples. The content of dry matter in all silages were low and ranged from 7.1 to 18.8%. Content of crude protein was highest in autumn months, when was from 289 to 339 g.kg-1 DM, which is much more compared to alfalfa silages. Crude fiber was in spring months from 295 to 422 g.kg-1 DM and in autumn months from 126 to 166 g.kg-1 DM. Development of fiber components was similar to development of crude fiber content. The concentration of crude protein and neutral detergent fiber in Rumex OK 2 silages from autumn months meet the criteria for first class legume silage. Only silages from October and November had the content of lactic acid more than 10 g.kg-1 of original matter. Addition of dried molasses increased (P<0.05) concentration of lactic acid and decreased (P>0.05) concentration of acetic acid in silages from September, October, April and May. All Rumex OK 2 silages did not contain butyric acid. Silage pH value appertain to its dry matter concentration was relative high, which make impossible the good overall assessment. However, according to concentration of crude protein, neutral detergent fiber and proteolysis can be Rumex OK 2 silages from autumn months considered as a nutritional valuable feed. On the other hand Rumex OK 2 silage from September contains high concentration of oxalic acid, which can be potentially hazardous for animals.

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