提高玉米秸秆饲料化品质的食用菌筛选

Screening of edible fungi for improving the feed quality of corn straw

为改善玉米秸秆加工制备的粗饲料其营养价值低且适口性差等问题,提高玉米秸秆饲料品质,本研究基于ITS条形码进行分类学鉴定的8株食用菌(S1~S8),以玉米秸秆为唯一碳源进行生物发酵培养,通过秸秆中木质纤维素的降解率、粗脂肪和粗蛋白质含量等比对筛选适合于玉米秸秆饲料化的菌株。研究结果表明:S4糙皮侧耳(Pleurotus ostreatus)降解纤维素和木质素的能力最强,达到47.31%和71.39%。S1斑玉蕈(Hypsizygus marmoreus)对半纤维素的降解能力最好,为61.91%。S2肺形侧耳(Pleurotus pulmonarius)粗蛋白质含量提高效果最好,达145%,饲料占比达12.48%。S1斑玉蕈粗脂肪含量提升效果最好,达495%,饲料占比达8.57%。

In order to improve the low nutritional value and poor palatability of the coarse feed prepared from the processing of corn straw and the quality of corn straw feed.In this study,8 strains of edible fungi(S1~S8)were taxonomically identified based on ITS bar code,and corn straw was used as the sole carbon source for biological fermentation culture.The strains suitable for corn straw feed were screened by comparing the degradation rate of lignocellulose,the contents of crude fat and crude protein in the straw.The results showed that the ability of S4 Pleurotus ostreatus to degrade cellulose and lignin was the highest,reaching 47.31%and 71.39%.The best degradation capacity of S1 Hypsizygus marmoreus for hemicellulose was 61.91%.The crude protein content of S2 Pleurotus pulmonarius was improved by 145%,and the proportion of feed was 12.48%.The increase effect of crude fat content of S1 Hypsizygus marmoreus was 495%,and the proportion of feed was 8.57%.