南方高温高湿区青贮饲料中主要霉菌毒素积累规律及生物防控机制研究

我国南方地区因高温高湿的气候特点成为青贮饲料霉菌毒素污染的主要区域，严重影响了奶产业的健康发展。为此本项目拟研究高温高湿环境下全株玉米和紫花苜蓿青贮饲料中产毒霉菌增殖和主要霉菌毒素（黄曲霉毒素，玉米赤霉烯酮和脱氧雪腐镰孢菌烯醇）的变化规律；挖掘具有高效抑制产毒霉菌及脱毒活性的乡土乳酸菌资源；剖析青贮过程中功能性乳酸菌抑制产毒霉菌活性的生物学机制；解析功能性乳酸菌对主要霉菌毒素的脱毒机理；研发针对我国南方高温高湿区青贮饲料中产毒霉菌及其毒素的生物防控技术，为高温高湿区优质、安全青贮饲料生产提供科学依据。

The southern China regions are the main areas suffering from mycotoxins in silages due to the prevailing high temperatures and high humidity, which in turn hinder the health and development of the dairy industry. In this project, we will firstly investigate the proliferation and accumulation of toxigenic fungi and mycotoxins (aflatoxins, zearalenone and deoxynivalenol) in whole-crop corn and alfalfa silages under high temperature and humidity climate; then isolate and identify native lactic acid bacteria with antifungal, probiotic, and detoxification properties; analyze the biological mechanisms of functional lactic acid bacteria inhibiting the activity of toxigenic fungi during ensiling; reveal the detoxification mechanisms of functional lactic acid bacteria to mycotoxins; exploit the biological control technology for toxigenic fungi and mycotoxins in silages, which will provide important database and information for production of top-quality and safe silage in high temperature and humidity areas of southern China.