Comparison of Two Methods for Analyzing the Forages and By-products Neutral Detergent Fiber and Acid Detergent Fiber
A. Riasi, A.A. Resani, H. Naimipour and M.H. Fathi
(Journal of Animal Science Researches. 19 (1): 91-103)
Abstract (The full text in Persian language)
The aim of study was evaluation of a new implement for determining neutral detergent fiber and acid detergent fiber and compares the implement with the method of Van Soest. Six samples of forages and by products (wheat straw, rape straw, alfalfa hay, atriplex hay, soybean meal and date seed meal) were dried and ground to pass through a 1-mm screen. One gram dried sample weighed into the Ankom and Dacron bags (3 Ankom bags and 3 Dacron bags for each sample). The crusivers of Fibertech system were filled with 1 gram dried sample (three replicate for each sample). The results showed there was no significant difference between methods in determining neutral detergent fiber (NDF) and acid detergent fiber (ADF) of the most samples (P>0.05). The slope of equation and coefficient of determination (R2) for the mean results of the neutral detergent fiber and acid detergent fiber analysis illustrated that there was a strong relationship (P<0.001) between different methods. The Pearson product moment correlation coefficient (r) for all methods in determining neutral detergent fiber and acid detergent fiber was positive and more than 90 percent. Findings suggest that the new methods (using Ankom or Dacron bags) had more accuracy for analyzing the NDF component of feedstuffs, in compared with Van Soest method.
Key words: Acid detergent fiber, Ankom implement, Feed, Neutral detergent fiber