中药饲料添加剂对甘南藏羊免疫功能及氨基酸和脂肪酸的影响

试验旨在研究中药饲料添加剂对甘南藏羊免疫功能、氨基酸及和免疫功能的影响。随机对60头藏羊分为6组,分为3个对照组和3个试验组,每组10头藏羊。在试验组的基础日粮中按1%添加本地取材的七味中药饲料添加剂。预试期10 d,正式试验期90 d。结果显示对照组相比与试验组甘南藏羊的免疫功能、氨基酸及脂肪酸均显著提高(P<0.05)。试验表明,在甘南藏羊日粮中添加中药饲料添,对甘南藏羊的免疫功能、氨基酸及的及脂肪酸有明显的改善,添加不同剂量的中药材有利于藏羊的健康发展。     

Effect of antifungal hydroxypropyl methylcellulose-beeswax edible coatings on gray mold development and quality attributes of cold-stored cherry tomato fruit

Edible composite coatings based on hydroxypropyl methylcellulose (HPMC), beeswax (BW), and food preservatives with antifungal properties, were evaluated on cherry tomatoes during cold storage. Food preservatives selected from previous research work included sodium propionate (SP), potassium carbonate (PC), ammonium phosphate (APh) and ammonium carbonate (AC). Cherry tomatoes artificially inoculated with Botrytis cinerea were coated and stored up to 15 d at 5 °C followed by 7 d of shelf-life at 20 °C. All antifungal HPMC-BW coatings significantly reduced gray mold development on inoculated and cold-stored cherry tomatoes, the SP-based coating being the most effective. Analytical and sensory fruit quality was also evaluated after cold storage and shelf-life. The AC-based coating was the most effective to control weight loss and maintain the firmness of coated cherry tomatoes. Respiration rate, firmness, color, sensory flavor, off-flavor, and fruit appearance were not adversely affected by the application of the antifungal coatings. Overall, the application of HPMC-BW edible composite coatings containing AC could be a promising treatment to extend the postharvest life of cherry tomatoes. Further studies should focus on the modification of some physical characteristics of the coatings in order to enhance the general performance and provide higher peel gloss.     

苜蓿青贮概述及其关键点把控

苜蓿青贮作为解决苜蓿雨季收贮问题的重要手段,笔者分析了苜蓿青贮的优势,从可发酵性和附生微生物菌群两个方面探讨了苜蓿青贮的难点,提出了对应的解决措施以及引导苜蓿青贮准确发酵的方法,提供了苜蓿青贮添加剂的筛选方法,同时分析了窖贮与裹包青贮的利弊并指出了苜蓿青贮各环节关键点的把控,为苜蓿种植及奶牛养殖人员提供参考与借鉴。     

添加剂在减少畜禽粪便污染中的应用与发展前景

大量文献表明,酸化剂、吸附剂、尿酶抑制剂能减少氨的挥发和恶臭物质的排放,但这些添加剂仅能提供短期抑制,必须反复添加才能维持其作用。微生物制剂能利用粪便中未消化的营养物质繁殖,但如果不很好地了解畜禽粪便中微生物的发酵活动,该添加剂的作用效果值得怀疑。通过综述添加剂在畜禽粪便污染治理当中的应用,指出今后应开展如下工作:建立标准化程序评估添加剂的有效性;研究不同添加剂安全、经济、有效的作用剂量;评估在畜禽舍内使用添加剂后对畜禽、饲养员健康状况的影响;评估使用添加剂处理后的畜禽粪便在还田时对农业生态系统的影响。     

"食品添加剂"课程线上教学探究与实践

“食品添加剂”课程是食品类专业的专业技能课程，通过云课堂智慧职教APP和腾讯课堂直播实施“食品添加剂”课程线上教学。在梳理教学目标、课程内容的基础上实施线上教学，包括课程搭建、课前准备、课堂实施、课后安排、教学反思等环节。在线上教学过程中，开展了丰富多样、灵活多变的课堂活动，有效提升了学生的参与度和学习效果。