中华鳖配合饲料最佳储存时间的研究

为了研究中华鳖配合饲料在室温条件下,不同储存时间对其品质影响,设置了0、7、14、28、35、45和60 d储存时间,选取能够反映饲料品质指标即水分、粗蛋白、粗脂肪和挥发性盐基氮,分析其随着时间变化情况,从而明确中华鳖配合饲料的最佳储存时间.结果表明,饲料中的粗蛋白含量在储存0～35 d内各组间差异不显著;与对照组(保存0 d)相比,饲料中的粗脂肪含量在储存28 d后显著降低;鳖饲料中的水分含量呈现出先下降后上升的趋势,储存28 d以后显著高于(0 d)对照组;挥发性盐基氮的含量,在储存28 d以后,含量增加比较快,差异性显著.以感官指标为标准,在本试验条件下,在储存的45 d内,饲料的外观正常,从35 d开始,饲料的气味发生了变化,气味逐渐变淡,有发霉气味.在储存0～28 d内,中华鳖配合饲料的品质未发生明显变化,本研究为中华鳖配合饲料的实际储存提供参考数据.

Optimal storage periods of compound feed for soft-shelled turtle

In order to evaluate the effect of storage periods on the quality of compound feed for soft-shelled turtle (Pelodiscus sinensis) at room temperature, the feed samples were collected at 0, 7, 14, 28, 35, 45 and 60 d, respectively. The feed quality was evaluated by the indexes, including moisture, crude protein, crude fat and volatile salt-based nitrogen (TVB-N), and their changes with storage periods were analyzed, so as to determine the optimal storage period of compound feed for Pelodiscus sinensis. The results showed that there was no significant difference in crude protein content among the groups within 0-35 d of storage. However, the crude fat content decreased significantly after 28 d compared with that of the control group (0 d). The moisture in the diet of soft-shelled turtle decreased at first and then increased after 28 d of storage, which was significantly higher than that of the control group(0 d). The content of volatile basic nitrogen increased rapidly after 28 d of storage, and the difference was significant. According to the standard of sensory index, the appearance of the feed was normal within 45 d after storage under this experimental conditions. The smell of the feed changed, and the smell gradually faded with a musty smell from 35 d. The results showed that the quality of feed for Chinese soft-shelled turtle did not change significantly during storage 0-28 d. This study provided reference data for the storage of Chinese soft-shelled turtle formula feed.