نوع مقاله : مقاله کامل علمی- پژوهشی
نویسندگان
گروه علوم دامی، دانشکده کشاورزی، دانشگاه ایلام، ایلام، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Objective: Sugarcane (Saccharum officinarum) is one of the most important agricultural products of Khuzestan Province, which is produced in large quantities annually, and its waste can be used in animal nutrition. The present study aimed to investigate the effect of diets containing sugarcane bagasse (SB) treated with urea and sodium hydroxide at different times on in vitro rumen fermentation parameters and dry matter (DM) and organic matter (OM) digestibility in sheep.
Materials and Methods: This experiment was conducted as a 2×3 factorial in a completely randomized design with 6 treatments and 3 replicates for each treatment. The SB samples were mixed with solutions containing different levels of urea and sodium hydroxide and stored under anaerobic conditions for 30 or 45 days. Accordingly, the experimental treatments included 1- unprocessed SB stored for 30 days; 2- SB treated with 4% urea solution + 1% sodium hydroxide and stored for 30 days; 3- SB treated with 3% urea solution + 2% sodium hydroxide and stored for 30 days; 4- unprocessed SB stored for 45 days; 5- SB treated with 4% urea solution + 1% sodium hydroxide and stored for 45 days; and 6- SB treated with 3% urea solution + 2% sodium hydroxide and stored for 45 days. Then, using these SB samples, experimental diets were formulated and their fermentation processes and gas production parameters were measured.
Results: The results showed that sugarcane bagasse processed with 3% urea solution + 2% sodium hydroxide solution and stored for 30 days (treatment 3) or 45 days (treatment 6) had lower DM, OM (93.86, 92.91, 93.04, 94.52, 92.78 and 92.89% for treatments 1 to 6, respectively) and neutral detergent insoluble fiber (90.86, 89.07, 87.81, 90.62, 89.00 and 87.63% for treatments 1 to 6, respectively) percentage and higher DM and OM (51.04, 59.19, 64.43, 51.90, 60.60 and 65.50% for treatments 1 to 6, respectively) digestibility compared to other treatments (P<0.05). The lowest percentage of crude protein (2.67, 8.32, 8.27, 2.72, 8.27 and 8.47% for treatments 1 to 6, respectively) was observed in unprocessed SB stored for 30 or 45 days (P<0.05). The lowest gas production at 24-h (50.46, 60.73, 66.70, 52.63, 62.42, and 67.56 ml for diets 1 to 6, respectively) and 96-h (54.37, 65.95, 73.48, 55.92, 62.00, and 71.30 ml for diets 1 to 6, respectively) and the highest lag time (0.89, 0.24, 0, 0.65, 0.21, and 0 h) were observed in diets containing unprocessed SB stored for 30 (diet 1) or 45 (diet 4) days (P<0.05). Methane production, partitioning factor and efficiency of microbial mass production were not affected by the experimental treatments (P<0.05).
Conclusion: In general, according to the obtained results, the best processing method for SB can be suggested with 3% urea solution + 2% sodium hydroxide solution stored for 30 days.
کلیدواژهها [English]
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