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The objective of this study was to compare alternative devices and tissues for the determination of neutral detergent fiber (NDF) and acid detergent fiber (ADF) with the conventional method. Two tissues, nylon (50 μm) and TNT (100 g/m²), and two devices (fiber digester and autoclave) were used for the determination of NDF and ADF content compared to the conventional method. A completely randomized experimental design, which consisted of five treatments and 10 repetitions, was used. The NDF content obtained with TNT in the two devices differed from that obtained with the conventional method (P0.01), indicating this combination as a possible alternative to the conventional method. There was no difference (P>0.01) between the alternative methods for the analysis of NDF. The content of ADF differed between the devices and tissues evaluated (P0.01) and may be indicated as a practical alternative for the analysis of ADF. The NDF content obtained with nylon tissue, irrespective of the equipment used, and the ADF content obtained with nylon tissue in the fiber digester were similar to the conventional method.

The aimed of this work was to comparing the drying process in a microwave oven and forced air ventilation, as well as their effects on the chemical composition of different genotypes of the genus Cynodon (Tifton 85, Jiggs, Russell, Tifton 68 and Vaquero) collected at different ages cutting (28, 48, 63 and 79 days). The experimental design was a randomized block in a split-plot design, with 4 replicates. There was no difference (P>0.05) between the methods analyzed on the chemical composition of the genotypes studied. Increasing age cutoff negatively influenced (P

Objetivou-se por meio deste trabalho comparar o processo de secagem, em forno de microondas e em estufa de ventilação de ar forçada, bem como seus efeitos sobre a composição química de diferentes genótipos pertencente ao gênero Cynodon (Tifton 85, Jiggs, Russel, Tifton 68 e Vaquero) colhidos em diferentes idades de corte (28, 48, 63 e 79 dias). O delineamento experimental utilizado foi o de blocos casualizados em esquema de parcelas subdivididas, com 4 repetições. Não foi observada diferença (P>0,05) entre os métodos analisados sobre a composição química dos genótipos em estudo. O aumento da idade de corte influenciou negativamente (P