摘 要:枇杷果实贮藏过程中面临的一个主要问题是微生物引起的腐败与衰老,而二氧化氯(ClO2)是国际上公认的一种安全、高效、廉价的“绿色”防腐剂,无任何毒副作用残留。本试验研究了不同浓度ClO2处理‘冠玉’枇杷在非冷害低温(7.5±0.5)℃和0.02mm PE包装贮藏条件下相关理化指标,结果表明:与对照(清水)、50mg/L和150mg/L的ClO2 处理相比,100mg/L处理能使枇杷果实的呼吸强度维持在较低水平,并显著抑制果实腐烂指数、相对电导率和失重率的上升,减缓出汁率的下降,有效延缓了果实的衰老。54354
毕业论文关键词:枇杷;二氧化氯;保鲜
Fresh-keeping Effect of Chlorine Dioxide Treatment on Loquat Fruit
Abstract: One of the major problems about Loquat storage is facing in the process of decay caused by microorganisms, and chlorine dioxide (ClO2) is internationally recognized as a kind of safe, efficient and cheap green preservatives, without any side effects. The experimental study on the different concentration of ClO2 processing Guanyu loquat in the harmless chilling injury with low temperature (7.5±0.5) ℃ and 0.02 mm PE packing storage conditions related to the physical and chemical indicators, the results showed that compared with matched group (water), 50 mg/L and 150 mg/L ClO2 processing, The 100 mg/L treatment group can keep the respiration intensity of loquat fruit at lower levels, and inhibit the rate of fruit decay index, relative electric conductivity and the weightlessness to rise, slow the decline of juice yield, delay the senescence of loquat fruit effectively.
Keywords: Loquat, Chlorine dioxide, Fresh-keeping
目 录
前言 4
1 材料与方法 4
1.1 试验材料 4
1.2 试验设计与处理 4
1.3 检测指标与方法 5
1.3.1 呼吸强度测定 5
1.3.2 腐烂指数 5
1.3.3 相对电导率测定 5
1.3.4 失重率 5
1.3.5 出汁率测定 5
2 结果与分析 5
2.1 不同浓度ClO2处理对枇杷呼吸强度的影响 5
2.2 不同浓度ClO2处理对枇杷腐烂指数的影响 6
2.3 不同浓度ClO2处理对枇杷相对电导率的影响 6
2.4 不同浓度ClO2处理对枇杷失重率的影响 7
2.5 不同浓度ClO2处理对枇杷出汁率的影响 7
3 讨论 8
结 论 9
参考文献 10
致 谢 12
前言
‘冠玉’枇杷(Eriobotrya japonica Lindl. cv. Guanyu)是白沙类枇杷中的优良品种,也是我国五大枇杷主产区苏州洞庭山的主要推广种植品种[1]。由于枇杷成熟期恰逢初夏高温多雨季节,难于贮藏和长途运输,鲜果大量集中上市,若不能及时销售会出现大量烂果,进而制约枇杷种植产业的发展[2]。枇杷果实的腐烂主要是由炭疽菌为主的微生物引起的[3],低温贮藏虽能抑制枇杷采后腐烂,但在1~6℃低温下贮藏易发生果肉组织木质化、果肉褐变、果皮难剥离等不良冷害现象[4,5]。因此仍需探寻出在非冷害低温贮藏条件下安全、经济、高效的枇杷贮藏保鲜技术。