Determination of Physical, Chemical and Digestibility of some Agricultural by-products

پژوهشهای علوم دامی ایران

Article 11, Volume 3, Issue 4 - Serial Number 8, December 2011   

Document Type: Scientific - Research Articles

DOI: 10.22067/ijasr.v3i4.12549

Authors

reza tahmasebi¹; Omid Dayani²; amin kezre³

¹Ferdwosi University of Mashhad

²Department of Animal Sciences, Shahid Bahonar University of Kerman, Kerman, Iran

³Ferdowsi University of Mashhad

Abstract

In this experiment, physical and chemical characteristics and estimation of effective fiber and digestibility of
some agricultural by-products such as lerd, pulp and date kernel, grape pomace, pistachio hulls, lime and rice
straw were determined by using in vitro technique. Experimental data were analyzed as a complete randomized
design, with three replicates. Physical and chemical characteristics and digestibility parameters among samples
were significantly different. Rice straw due to high water holding capacity and low-density mass were floating
on the liquid phase of reticulo-rumen and stimulates rumination but palm seed with high bulk density tends to
deposit in the rumen. Chemical characteristics such as non-fibrous carbohydrates of lemon pulp and pistachio
hull and crude protein of grape pomace, lerd and pulp of date were significantly different between samples.
Results of physical characteristics, particle size separation and physical effective cell wall showed that rice straw
provides adequate fiber in diet. Also, to some extent physical effective cell wall can be provided by grape
pomace, kernel and lerd of date. The predictions of particle size separation and physical effective cell wall were
found to compare reasonably well when new Pennsylvania sieves, compare to old ones, were used. By
considering physical and chemical characteristics of above mentioned agricultural by-products date pulp with
non-fibrous carbohydrate and high protein content and digestibility can be used in higher amounts in ruminant
diets.

Keywords

Physical; Chemical characteristic; digestibility; Agricultural by-products