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Information Journal Paper

Title

Evaluation of Nutritional Value and Ruminal Fermentation of Mesquitepod

Pages

  35-46

Abstract

 Introduction: Mesquite is the dominant flora of southern Iran. Whole pod contains capsule and some seeds which its color, after ripen, is yellow and contains considerable protein and carbohydrate. One of the most important usage of this pod is as animal feed, because the ripen pod is palatable and has high Nutritional value. This study was conducted to evaluate chemical composition, ruminal fermentation and Digestibility of different parts of mesquite plant as a completely randomized design. Materials and Methods: Mesquite pod was collected from different areas of Hormozgan province. Whole pod, husk and seed were grounded separately. Chemical composition of different parts of Mesquite pod (dry matter, organic matter, ash, ether extract, crude protein, non fiber carbohydrate, neutral detergent fiber, acid detergent fiber and lignin) was separately determined. In vitro gas production test (IVGPT) was conducted at two parts. For this purpose, rumen fluid was obtained from three fistulated rams before the morning feeding. The rams were fed twice daily with a diet containing alfalfa hay and commercial concentrate to meet their requirements. The collected ruminal fluid was pooled in a flask and was transported under anaerobic conditions to the laboratory. Rumen fluid was filtered through four layers cheesecloth and then mixed continuously with CO2 and maintained at 39 o C before the usage. After pre-incubation, the rumen fluid was mixed with buffered mineral solution at the ratio of 1: 2 rumen fluid to mineral buffer (V/V). At first part of IVGPT to evaluate kinetics of ruminal fermentation at different incubation time (120 hours), 200 mg of dried and grounded sample was transfer to glass syringe. Syringes were filled with 30 ml of medium (consisting of 10 ml of rumen fluid and 20 ml of buffer solution). The values of produced gas at 0, 2, 4, 6, 8, 12, 24, 48, 72, 96 and 120 hours after incubation time were determined. At second part of IVGPT, 500 mg sample with 40 ml medium incubated for 24 hour and amount of produced gas, apparent dry matter Digestibility, true organic matter Digestibility and partitioning factor of samples were measured. Total gas production of each syringe (at first and second parts of IVGPT) was corrected for blank which contained only rumen fluid. Two stages in vitro Digestibility was done. Different parts of protein in whole pod and husk were estimated based on CNCPS method. Results and Discussion: Results showed that there were significant differences for chemical compositions of different parts of Mesquite pod except for dry matter (DM) and acid detergent fiber (P<0. 05). As seed had highest values of crude protein (CP), ether extract (EE) and lignin (P<0. 05). Percentages of crude protein in whole pod, husk and seed were 12. 15, 10. 65 and 36. 53 respectively. But difference between whole pod and husk was not significant. No significant difference of crude protein content of whole pods and husk is probably due to low weight of seeds in the pod (percentage of seeds in pod was 7. 5 percent). Volume of produced gas at 120 hours incubation (GP120) and the potential of gas production (b) for husk were significantly higher than those of other parts (P<0. 05). The highest amounts of partitioning factor and produced microbial protein were observed in seed. Husk had highest value of short chain fatty acid (SCFA). In vitro dry matter Digestibility (IVDMD), in vitro organic matter Digestibility (IVOMD), in vitro digestible organic matter in dry matter (IVDOMD) and metabolizable energy (ME) were significantly higher in seed compared to other parts (P<0. 05). No significant difference was observed between the whole pod and husk. Protein components in different parts of Mesquite pod showed very significant differences (P<0. 01). Concentration of soluble protein (SP), non protein nitrogen (A) and highly degradable protein (B1) were significantly higher in husk than whole pod (P<0. 05). Protein bonded to NDF (NIDP) in different parts of pod showed significant differences (P<0. 05). Concentration of soluble protein (SP), non protein nitrogen (A) and protein with highly rates of degradation (B1) were significantly higher in husk than those of whole pod (P<0. 01). Soluble and non-structural carbohydrates participate in supply of energy for ruminal microbes and due to high rumen protein degradation, ammonia nitrogen produced is increased. Part A includes small molecules that contain peptides, free amino acids, nucleic acids, amides, amines, nitrates and ammonia. The higher amount of the true protein in feed, the lower amount of part A. Husk has more part A than other two parts of the pod (seed and whole pod), so it contains lower true protein compared to other parts of the pod. The reason for the high protein bonded to NDF (NIDP) in the whole pods compared to husk is probably due to the higher content of crude protein in the whole pod compared to husk so more links between cell wall and protein nitrogen. The higher the NIDP content in a feed, the higher potential for bypass protein. Conclusion: Overall results showed that when considering chemical composition, Digestibility and ME, mesquite has relatively high Nutritional value. Considering the southern Iran’ s climate and the fact that mesquite is the dominant flora of this part of Iran, mesquite can be used as a part of diet for ruminants.

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    APA: Copy

    ALIARABI, H., ALIPOUR, F., ZAMANI, P., ALIPOUR, D., MALEKI, M., & Zaboli, K.. (2018). Evaluation of Nutritional Value and Ruminal Fermentation of Mesquitepod. IRANIAN JOURNAL OF ANIMAL SCIENCE RESEARCH, 10(1 ), 35-46. SID. https://sid.ir/paper/389462/en

    Vancouver: Copy

    ALIARABI H., ALIPOUR F., ZAMANI P., ALIPOUR D., MALEKI M., Zaboli K.. Evaluation of Nutritional Value and Ruminal Fermentation of Mesquitepod. IRANIAN JOURNAL OF ANIMAL SCIENCE RESEARCH[Internet]. 2018;10(1 ):35-46. Available from: https://sid.ir/paper/389462/en

    IEEE: Copy

    H. ALIARABI, F. ALIPOUR, P. ZAMANI, D. ALIPOUR, M. MALEKI, and K. Zaboli, “Evaluation of Nutritional Value and Ruminal Fermentation of Mesquitepod,” IRANIAN JOURNAL OF ANIMAL SCIENCE RESEARCH, vol. 10, no. 1 , pp. 35–46, 2018, [Online]. Available: https://sid.ir/paper/389462/en

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