Publication Date
1985
Location
Kyoto Japan
Description
The influence of different drying methods for the sample used for analysis on the estimates of the nutritive value of silage was investigated. The silages and hay were made from the same grass and fed to three wethers to determine digestibilities. The samples for analytical use of silages and hay fed, and feces excreted, were prepared by three drying techniques of freeze drying (F), oven drying at 60 C (L) and oven drying at 100 C (H) and then each dried sample was ground in a Wiley mill to pass a 0.5 mm screen. The residual moisture in prepared samples was determined by vacuum drying (V) for freeze dried sample and oven drying at 105 C ( 0) for oven dried samples. The estimates of chemical compositions and digestibilities of the silages varied marked with the difference of the drying methods, whereas those of the hay did not varied. The digestibilities of the silage and hay were slightly affected by the difference of the fecal preparation. The nutritive values estimated by the FV method were higher in the silage than in the hay. These results clearly show that the oven drying methods can lead to small errors in the determination of chemical component of silage, and these errors can be amplified greatly in subsequent evaluation of digestibility and nutritive value. The FV method is, therefore, more advantageous to evaluate the nutritive value of silage accurately than oven drying method.
Citation
Uchida, S; Hayashi, H; and Horigome, T, "Effects of Sample Drying Method on Estimates of Nutritive Value Value" (1985). IGC Proceedings (1985-2023). 39.
(URL: https://uknowledge.uky.edu/igc/1985/ses9/39)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effects of Sample Drying Method on Estimates of Nutritive Value Value
Kyoto Japan
The influence of different drying methods for the sample used for analysis on the estimates of the nutritive value of silage was investigated. The silages and hay were made from the same grass and fed to three wethers to determine digestibilities. The samples for analytical use of silages and hay fed, and feces excreted, were prepared by three drying techniques of freeze drying (F), oven drying at 60 C (L) and oven drying at 100 C (H) and then each dried sample was ground in a Wiley mill to pass a 0.5 mm screen. The residual moisture in prepared samples was determined by vacuum drying (V) for freeze dried sample and oven drying at 105 C ( 0) for oven dried samples. The estimates of chemical compositions and digestibilities of the silages varied marked with the difference of the drying methods, whereas those of the hay did not varied. The digestibilities of the silage and hay were slightly affected by the difference of the fecal preparation. The nutritive values estimated by the FV method were higher in the silage than in the hay. These results clearly show that the oven drying methods can lead to small errors in the determination of chemical component of silage, and these errors can be amplified greatly in subsequent evaluation of digestibility and nutritive value. The FV method is, therefore, more advantageous to evaluate the nutritive value of silage accurately than oven drying method.
