Effects of microwaving, and moist and dry heating on ruminal degradability of protein and dry matter in soybean meal
Two experiments were conducted to evaluate the effects of microwaving, autoclaving (moist heating), and roasting (dry heating) on gas production parameters and in situ rumen degradability of soybean meal (SBM). SBM was treated by roasting at 140℃ for 30 and 60 min, and at 160℃ for 30 and 60 min, autoclaving at 121℃ for 20 min, and microwaving for 2, 4, and 6 min. A gas production trial was performed using rumen fluid collected from fistulated sheep. Cumulative gas production was recorded at 2, 4, 6, 8, 12, 24, 36, 48, 72, and 96 h after incubation. The organic matter digestibility (OMD), metabolizable energy (ME), net energy (NE), and short-chain fatty acid (SCFA) in gas production trial were calculated after 24 h incubation. For in situ technique, three fistulated sheep of the Dalaq breed (with an average weight of 54 ± 1 kg) were housed in individual cages and fed at the level of maintenance. Samples of the processed and unprocessed SBM were ground to pass through a 3 mm screen, and 5 g of each sample were transferred into nylon bags. The results showed that treatments had a significant effect on gas production potential (P<0.05). With increasing the heating duration, gas production potential increased in roasted treatments. Processing methods significantly reduced gas production (P<0.05). The lowest volume of gas production was recorded for the autoclave treatment. Processing with Micro-6 and moist heating (autoclave) resulted in a significant decrease in organic matter digestibility (OMD) compared to dry heating (roasting). Micro-6 treatment significantly (P<0.05) decreased the concentration of SCFA compared to other treatments. The results of in situ experiments showed that processing of SBM significantly reduced the rate of dry matter and protein degradation (P<0.05). Processed SBM had a lower rapid degradable fraction (a) and higher slowly degradable fraction (b) compared to the control treatment. In conclusion, the methods of heating (autoclaving, dry heating, and microwaving) of SBM decreased the gas production and gas production rate and ruminal protein degradability.
The aim of the experiment was to determine the effect of different dry matter content and addition of silage inoculant on the ruminal protein degradability. Alfalfa herbage was collected from two cuts and the fresh matter was sampled two times during each cut (with different dry matter content). During the preparation of experimental micro-silages, the chopped forage was treated with a microbia...متن کامل
Effects of additives on chemical composition, degradability coefficients and ruminal-intestinal disappearance of dry matter and crude protein of laboratory ensiled olive cake
The chemical composition, degradability coefficients (in situ) and ruminal-intestinal disappearance(mobile bag procedure) of dry matter (DM) and crude protein (CP) were evaluated for olive cake (OC)silages treated (DM basis) with additives as follows: (1) untreated OC, (2) OC + 0.5% urea, (3) OC + 0.4%formic acid, (4) OC + 8% molasses, (5) OC + 0.5% urea + 8% molasses, (6) OC + 0.5% urea + 0.4%...متن کامل
In situ Evaluation of Ruminal Degradability and Intestinal Digestibility of Sunflower Meal Compared to Soybean Meal
The aim of this study was to compare the nutritional value of sunflower meal (SFM) and soybean meal (SBM) protein by determining both its ruminal degradability and intestinal digestibility. Three non lactating Jersey cows fitted with a rumen and T-type duodenal cannulas were used to estimate rumen degradability and intestinal digestibility of SFM and SBM dry matter (DM) and crude protein (CP). ...متن کامل
Three cannulated Tswana steers were used to investigate the rumen degradability of mopane worm (Imbrasia belina) by measuring the amount of dry matter (DM) and crude protein (CP) disappearing at incubation periods up to 72 h. The effective degradability (ED) of DM and CP in the rumen was calculated at outflow rates of 0.03 / h (ED0.03) and 0.05 / h(ED0.05). Rumen degradable CP (RDP) was estimat...متن کامل
the aim of the experiment was to determine the effect of different dry matter content and addition of silage inoculant on the ruminal protein degradability. alfalfa herbage was collected from two cuts and the fresh matter was sampled two times during each cut (with different dry matter content). during the preparation of experimental micro-silages, the chopped forage was treated with a microbia...متن کامل
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دوره 7 شماره 1
صفحات 11- 19
تاریخ انتشار 2019-10-14
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