Determination of Nutritive value of Bean straw in ruminant nutrition
2007
Mirza`ie, | Borji, Mohsen | Fazae`li, Hasan | Azizi, Ramezan A`li
This study was conducted to determine the chemical composition, digestibility (in vivo and in vitvo), ruminal degradability and gas production parameters of the bean straws. Samples were collected from 15 villages located in three climatic zones (semi arid, moutainous and cold and mountainous) of Markazy province (Iran) and from three locations in every village. Chemical composition was determined by standard methods and digestibility also was determined by in vitro and in vivo methods. The gas production measured by in vitro and degradability by dacron bags method. The mean content of CP, EE, CF, NDF, ADF, ADL, and Ash in bean straws were 7.33 ± 1.29, 1.14 ± 0.41, 30.84 ± 3.4, 59.79 ± 10.46, 42.98 ± 8.45, 14.07 ± 2.33 and 12.72 ± 3.61 percent respectively, that were not significantly different between regions with exception for NDF and ADF. The cocentration of minerals including Ca, P, Na, K, Mg, Fe, Mn, Cu and Zn were 1.15 ± 0.14, 0.19 ± 0.02, 0.00074 ± 0.00042, 1.38 ± 0.17, and 0.23 ± 0.03 percent, 268.3 ± 38.47, 166.35 ± 23.85, 14.10 ± 2.53 and 16.92 ± 3.04 mg per Kg respectively. In vitro DMD and OMD varied betwean 71.02-73.8 and 68.95-71.35 percent in bean straws. Averge in vivo digestibility of straws for CP, OM, CF, NEF, ADF and NDF were approximately 56.3, 63.56, 50.16, 74.75, 52.95 and 58.82 percent that differences among regions were not statistically significant except for ADF. Extent of degradation for DM (a+b) derermined by nylon-bag technique was 76.8% that was not significantly different between regions. Gas production results showed siginficant difference between regions (P0.05). The most GP at 48h and 96h of incubation was estimated for semi arid bean straw that was 61.87 and 63.87 ml respectively.
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