Impact of kernel breakage and storage conditions on mildew growth in grain piles.

IF 2.3 3区 农林科学 Q2 CHEMISTRY, APPLIED
Yang Zhou, Lei Han, Peng Wang, Yinuo Chen
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引用次数: 0

Abstract

Grain storage is vital in today's world, however the annual grain losses due to mycotoxin contamination reach 250 million tons all over the world. During harvesting, processing and storage (damping and compression), mechanical damage to kernels inevitably creates fracture/breakage and thereafter mildew in the grain silo. One issue that the effect of breakage type and position on mildew under one dimensional (1D) loading was not fully understood up to date. In this paper, the effects of different fracture types and spatial positions on mold proliferation under compressive storage conditions were investigated. First, this study simulates the storage of grain piles under 1D load conditions using in total nine tests in three studies. The effect of breakage type and spatial position on mildew under different compression load were researched. The dry matter loss, grain temperature along with colony count were compared among different breakage type and positions of broken kernels. The results proved that as the moisture content increased, the compression of the pile was larger and the porosity was correspondingly lower, which in turn caused an increase in the temperature and the number of broken kernels. These factors were the main causes of mould in the pile. It is imperative that kernels exposed to the endosperm should be prioritized by screening if necessary, and attention should be paid to the center of the silo during ventilation, which can effectively reduce the mould in the pile. In conclusion, this study aims to understand the fungal contamination under varied kernel fractures and further help to reduce economic losses and improve the food safety after proper management.

谷粒破碎和贮藏条件对谷粒霉变生长的影响。
粮食储存在当今世界至关重要,但全球每年因霉菌毒素污染造成的粮食损失高达2.5亿吨。在收获、加工和储存(阻尼和压缩)过程中,对籽粒的机械损伤不可避免地造成断裂/破损,随后在粮仓中产生霉菌。在一维荷载作用下,断裂类型和断裂位置对霉菌的影响是目前尚未完全了解的一个问题。研究了在压缩贮存条件下,不同断裂类型和空间位置对模具扩散的影响。首先,本研究模拟了一维荷载条件下粮食桩的储存,在三个研究中共进行了9个试验。研究了不同压缩载荷下断裂类型和空间位置对霉变的影响。比较了不同破碎方式和破碎位置籽粒的干物质损失量、籽粒温度和菌落数。结果表明,随着含水率的增加,桩的压缩性越大,相应的孔隙率越低,从而导致温度的升高和破粒数的增加。这些因素是引起桩内发霉的主要原因。必要时应优先筛选与胚乳接触的籽粒,通风时应注意筒仓中心,可有效减少桩内霉菌。综上所述,本研究旨在了解不同果仁断裂情况下的真菌污染情况,进一步减少经济损失,提高管理得当的食品安全性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.40
自引率
6.90%
发文量
136
审稿时长
3 months
期刊介绍: Food Additives & Contaminants: Part A publishes original research papers and critical reviews covering analytical methodology, occurrence, persistence, safety evaluation, detoxification and regulatory control of natural and man-made additives and contaminants in the food and animal feed chain. Papers are published in the areas of food additives including flavourings, pesticide and veterinary drug residues, environmental contaminants, plant toxins, mycotoxins, marine biotoxins, trace elements, migration from food packaging, food process contaminants, adulteration, authenticity and allergenicity of foods. Papers are published on animal feed where residues and contaminants can give rise to food safety concerns. Contributions cover chemistry, biochemistry and bioavailability of these substances, factors affecting levels during production, processing, packaging and storage; the development of novel foods and processes; exposure and risk assessment.
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