脐橙新型壳聚糖水凝胶抑菌保鲜研究

Study on the inhibition and preservation of new chitosan hydrogel in Navel orange

摘要: 以纽荷尔脐橙为试材,研究了壳聚糖水凝胶对青霉菌(Penicillium italicum)的抑制及其对脐橙的保鲜效果。结果表明不同浓度壳聚糖水凝胶对脐橙采后P.italicum均有一定的抑制作用。当浓度为2.0%时,培养5d后,菌落直径15mm,抑菌率42%,抑菌圈直径65mm,且涂膜后贮藏90d品质最好。说明壳聚糖水凝胶对脐橙采后P.italicum具有明显抑制作用,其中以2.0%的壳聚糖水凝胶效果最优,同时能够提高脐橙贮藏品质。

Abstract: The aim was to study the inhibition of chitosan hydrogel against the Penicillium italicum and preservation in‘Newhall'Navel orange.The experiment indicated that chitosan hydrogel had a certain inhibiting effect on the Penicillium italicum.In the meanwhile, the inhibiting rate was 42% and colony diameter and inhibiting zone was 15mm and 65mm after 5d cultivation, respectively.Also, it had the best quality of Navel orange after 90 days' storage when the concentration was 2.0%.The result showed that chitosan hydrogel had a clearly inhibiting effect on the Penicillium italicum and the ability to extend the freshness of navel orange, and the optimal one was 2.0%.