中文摘要:最近,挪威燕麦中经常出现由禾谷镰刀菌产生的高浓度真菌毒素脱氧雪腐镰刀菌烯醇(DON)。DON水平的早期预测对农民、当局和粮食产业很重要。本研究确定了影响霉菌毒素积累的主要天气因素,并开发了两种预测挪威燕麦籽粒中DON风险的模型:(1)农民决定是否及何时进行杀菌剂处理的预警系统,(2)用于收获时当局和业界确定潜在的食品安全问题。研究发现一个只包括开花前天气条件的预测模型就足以预测燕麦中DON污染的风险,并帮助做出杀真菌剂处理的决定。
外文摘要:High concentrations of the mycotoxin deoxynivalenol (DON), produced by Fusarium graminearum have occurred frequently in Norwegian oats recently. Early prediction of DON levels is important for farmers, authorities and the Cereal Industry. In this study, the main weather factors influencing mycotoxin accumulation were identified and two models to predict the risk of DON in oat grains in Norway were developed: (1) as a warning system for farmers to decide if and when to treat with fungicide, and (2) for authorities and industry to use at harvest to identify potential food safety problems. Oat grain samples from farmers' fields were collected together with weather data(2004-2013). A mathematical model was developed and used to estimate phenology windows of growth stages in oats (tillering, flowering etc.).Weather summarisations were then calculated within these windows, and the Spearman rank correlation factor calculated between DON-contamination in oats at harvest and the weather summarisations for each phenological window. DON contamination was most clearly associated with the weather conditions around flowering and close to harvest.Warm,rainy and humid weather during and around flowering increased the risk of DON accumulation in oats, as did dry periods during germination/seedling growth and tillering. Prior to harvest, warm and humid weather conditions followed by cool and dry conditions were associated with a decreased risk of DON accumulation. A prediction model, including only pre-flowering weather conditions, adequately forecasted risk of DON contamination in oat, and can aid in decisions about fungicide treatments.
外文关键词:Deoxynivalenol;Phenological development;Spearman rank correlation factor
作者:Hjelkrem, AGR;Torp, T;Brodal, G;Aamot, HU;Strand, E;Nordskog, B;Dill-Macky, R;Edwards, SG;Hofgaard, IS
作者单位:Norwegian Inst Bioecon Res NIBIO
期刊名称:EUROPEAN JOURNAL OF PLANT PATHOLOGY
期刊影响因子:1.494
出版年份:2017
出版刊次:3
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