Determining Chemical Composition and Rumen Degradation Characteristics of Different Chickpea (Cicer Arietinum L.) Lines Straw

Abstract

This study aimed to identfy chemical composition, ruminal degradation characeristics and metabolizable energy (ME) content of five different chickpea line and a check cultivar's straw using nylon bag technique. Feed samples were incubated as three replicates of each fistulated Holstein heifer for 0, 8, 12, 24, 36, 48, 72 and 96 h. Degradation characteristics of dry matter (DM) and neutral detergent fiber (NDF) in rumen were determined by using this mathematical expression D=a+b(1-e -ct ). Crude protein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF), and ash contents of straw were ranged from 5.61 to 7.42%, 51.33 to 56.0%, 63.67 to 67.0%, and 8.0 to 9.0% respectively. Besides Rapidly soluble fraction (a), potantial degradability (a+b) and effective dry matter degradability (ED DM ) were ranged from 17.86 to 21.41, 54.40 to 59.43, 49.65 to 54.91% respectively. Estimated ME of chickpea entries straw were ranged from 5.96 to 7.37 MJ/kg. Metabolizable energy content of control chickpea cultivar was significantly higher than the other chickpea straw of lines. The research values of ME revealed that significant differences were determined among the lines in terms of energy content. In addition to, a strong relationship between straw NDF level and ME content were determined. Keywords IntroductionStraw is very important by-products from legume and cereal crops (López, 2005). After harvesting cereal and legume crops, a lot of biomass remains in the field. These residues are known an agricultural waste. Chickpea straw is produced, about 120.267 ton each year in Turkey (Anonymous, 2011). This plant remains left after harvesting of chickpea very important material with valuable nutritive value compared with similar straw from cereals crops (Ramalho et al., 1990). After chickpea grain threshing, large amounts of straw usually equal to more than the seed yield remain.Chickpea straw generally contains more protein, greater energy and lower cell wall contents than that of cereal straws (Aghajanzadeh et al., 2012;Kafilzadeh, 2012). Cell-wall of straw becomes mostly carbohydrates which is the most important fragment of by-products. Carbohydrates are essential for microbial digestion in the rumen so that by-products of crops are very important role in ruminant feeding (Bruno-Soares et al., 2000). Ørskov et al., (1992) and Shem et al., (1995) reported that degradation characteristics of by-product in the rumen would supply an advantage to put to good use of their nutritious value recently. Besides, cereal straw generally contains less protein and metabolizable energy but higher neutral detergent fibre (NDF) concentrations than Chickpea straw. As a result of this situation chickpea straw has about 10 and 42% higher rumen degradability and Dry matter (DM) digestibility than cereal straws, respectively. Furthermore (Bampidis et al., 2011;Kafilzadeh, 2012) reported that digestible energy and metabolizable energy content of chickpea straw were 8.3 and 7.7 MJ/kg DM and Bruno-Soares et al., (2000) found that acid deter...

Comparative Grain Yield, Straw Yield, Chemical Composition, Carbohydrate and Protein Fractions, In Vitro Digestibility and Rumen Degradability of Four Common Vetch Varieties Grown on the Qinghai-Tibetan Plateau

“…The differences in EDDM between the varieties can be mainly attributed to the differences in A fraction and not to B and C fractions, which is consistent with the literature [47]. The EDDM reported for common vetch straw in our study are similar to that reported for chickpea straw (51.8% DM) [49], but greater than that reported for fenugreek ( Trigonella foenum-graecum ) straw (32.2% DM) [50]. The degradation profiles of NDF were not influenced by variety in our study, which is in agreement with the earlier reports on maize and chickpea [47,49].…”

“…The EDDM reported for common vetch straw in our study are similar to that reported for chickpea straw (51.8% DM) [49], but greater than that reported for fenugreek ( Trigonella foenum-graecum ) straw (32.2% DM) [50]. The degradation profiles of NDF were not influenced by variety in our study, which is in agreement with the earlier reports on maize and chickpea [47,49]. Bruno-Soares et al [48] reported less rapidly degradable NDF fraction and rate of NDF degradation, and similar potentially degradable NDF fraction in comparison with those observed in this study.…”

“…The EDNDF of straw in this study was less than reported by Abbeddou et al [51] for lentil straw (45.9% NDF), but greater than that reported by Mustafa et al [50] for fenugreek straw (20.3% NDF). Different studies recorded different ruminal degradation kinetics due to differences in varieties/species, straw composition, and animal species [4,49,50,51].…”