不同厌氧碱化处理方法对鲜麦秸感官指标及营养成分的影响

Effects of Different Alkaline Anaerobic Treatments on Sensory Indexes and Nutrients of Fresh Wheat Straw

本试验旨在研究不同厌氧碱化处理对新鲜麦秸感官指标及营养成分的影响,为秸秆饲料化处理提供理论依据。试验将新鲜麦秸分别用2.5%碳酸氢钠、4%尿素以及2.5%碳酸氢钠+4%尿素(复合处理)厌氧处理,时间为10、20、30、40、55、70 d,分析不同处理对麦秸感官指标及营养成分的影响。结果表明:碳酸氢钠组有霉变现象,尿素组及复合处理组感官指标良好;尿素组、复合处理组较碳酸氢钠组极显著提高了粗蛋白(CP)含量(P<0.01),复合处理组极显著高于尿素组(P<0.01);尿素组和复合处理组较碳酸氢钠组显著降低了中性洗涤纤维(NDF)含量(P<0.05),极显著降低了半纤维素(HCEL)含量(P<0.01),复合处理组的效率优于尿素组;3种处理对酸性洗涤纤维(ADF)、酸性洗涤木质素(ADL)、纤维素(CEL)影响较小。综上可知,碳酸氢钠-尿素复合处理鲜麦秸可改善秸秆营养品质,提高尿素处理秸秆的效率。

This experiment was conducted to investigate the effects of different alkaline anaerobic treatments on sensory indexes and nutrients of wheat straw in fresh, in order to provide the theoretical basis for the process of making forage with straw. The wheat straw in flesh was treated with 2.5% sodium bicarbonate, 4% urea and both of the 2.5% sodium bicarbonate and 4% urea （compound treatments） respectively, the processing time was 10, 20, 30, 40, 55, 70 d, all samples were subjected to analysis determine the sensory indexes and nutrients. The results showed that some mould occurred in the sodium bicarbonate group during storage, while both urea and compound treated groups performed well. Urea group and compound treated group significantly increase the crude protein （CP） content than the sodium bicarbonate group （P〈0.01）, compound treated group was significantly higher than that of urea group （P〈0.01）, both urea group and the compound group significantly reduced the neutral detergent fiber （NDF） content of straw than that of sodium bicarbonate group （P〈0.05）, significantly decreased the hemicellulose （HCEL） content （P〈0.01）.The efficiency of compound treatment was better than urea treatment .Three alkaline anaerobic treatments were less influenced on the acid detergent fiber （ADF）, acid detergent lignin （ADL） and cellulose （CEL） content of wheat straw. It can be concluded that the compound treatments with both sodium bicarbonate and urea effectively improved the nutritive values of the straw, and improved the efficiency than that of urea treatment.