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丁宁 《柑桔与亚热带果树信息》2012,(8):71-71
据《江苏农业科学》2012年第3期《自发气调包装和乙烯吸收剂对水蜜桃贮藏品质的影响》(作者刚成诚等)报道,以江苏省张家港市凤凰镇的凤凰水蜜桃(Prunuspersica)为材料,研究了在冷藏和室温条件下用自发气调包装(MAP)和乙烯吸收剂处理果实的保鲜效果。 相似文献
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果品应用特制的塑料薄膜包装、自发气调保鲜,为目前果品贮藏保鲜技术的主要辅助措施,在我国的产地贮藏保鲜系列技术中占重要地位.正确选用塑料保鲜袋,是取得保鲜效果的前提.我们通过大量试验,筛选出PVC保鲜袋,用于苹果元帅系、金冠、倭锦、青香蕉、国光等中、晚熟品种和部分梨以及蔬菜等的生理包装,在0℃冷风库中贮藏,保鲜效果良好,现简介如下. 一、PVC袋的性能和特点 PVC自发气调保鲜袋,是利用特制的去毒聚氯乙烯薄膜制成的,这种膜的透比和透气量都较同一规格的聚乙烯膜要大.果实装入保鲜袋后,在一定的温度条件下,利用果实的呼吸作用,… 相似文献
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寒露蜜桃的保鲜技术研究 总被引:1,自引:0,他引:1
本主要研究了成熟度、包装形式及预冷温度等因素对寒露蜜桃的采后呼吸生理的影响及保鲜技术措施。结果表明:预冷温度愈低,对桃前期呼吸有明显抑制作用;适宜包装袋起到了较好的MA气调作用,抑制了呼吸:高成熟度的果前期呼吸强度相对较大,峰值较高。另外发现:CO2浓度高易造成果实风味下降。采用适宜保鲜措施(4℃预冷+0℃冷藏+PE包装+低成熟度+乙烯吸收剂)可使寒露蜜桃保鲜45d左右。 相似文献
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【目的】研究不同厚度的保鲜袋自发气调包装和乙烯吸收剂对‘玉露香’梨采后生理和贮藏品质的影响,为生产应用提供技术参考。【方法】分别将商业成熟的‘玉露香’梨采用0.02 mm PE袋、0.02 mm PE袋+乙烯吸收剂、0.03 mm PE袋、0.03 mm PE袋+乙烯吸收剂、0.04 mm PE袋和0.04 mm PE袋+乙烯吸收剂扎口处理形成自发气调环境,于温度(0±0.5)℃、相对湿度90%~95%条件下贮藏,并以0.02 mm PE袋不扎口为对照处理。定期监测不同包装袋内O2、CO2和乙烯浓度,在‘玉露香’梨冷藏150 d和210 d时测定各处理果实叶绿素荧光参数、叶绿素含量、果实硬度、可溶性固形物、可滴定酸、抗坏血酸、货架期呼吸强度和乙烯释放量等理化指标,并调查果心褐变情况。【结果】采用扎口处理的不同厚度保鲜袋内气体成分在第35天时达到平衡,气调能力水平由高到低依次为0.04 mm PE袋0.03 mm PE袋0.02 mm PE袋,CO2浓度最高可达到3.2%,最低为0.9%。与其他厚度保鲜袋相比,采用0.03 mm PE袋包装进行自发气调处理能够抑制果皮叶绿素含量、Fm、Fv和Fv/Fm的下降,果实硬度与对照无显著差异,但果心褐变指数显著高于对照,可溶性固形物含量显著低于对照。【结论】0.03 mm PE袋的自发气调可使环境维持在O2为18.7%~19.5%、CO2为1.2%~1.5%时有效保持‘玉露香’梨果实果面绿色,但降低了果实可滴定酸、维生素C等内在品质,同时增加了果心褐变程度。乙烯吸收剂对保绿效果不明显,因此,需要自发气调结合1-MCP处理,从而既达到保绿效果,又能有效维持果实内在品质的目标。 相似文献
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自发气调包装(Modified At-mosphere Packaging MAP)作为一种投资小、使用方便的贮藏技术,越来越多地被应用在果蔬贮运保鲜中。本试验研究了0℃下自发气调贮藏保鲜青脆李的效果,结果表明,与聚乙烯(PE)打孔薄膜袋(对照)相比,聚乙烯、聚氯乙烯(PVC)和高渗出二氧化碳保鲜袋3种自发气调包装袋均可减缓青脆李果实硬度和可滴定酸含量的下降,延缓果实衰老。与聚氯乙烯、高渗出二氧化碳 相似文献
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为研究激光微孔保鲜袋包装对樱桃番茄果实采后保鲜效应的影响,以‘玉女’樱桃番茄果实为材料,分别采用激光微孔保鲜袋与普通聚乙烯薄膜袋(对照组)包装处理果实,随后贮藏在温度为(25±1)℃、相对湿度为85%条件下18d。在贮藏期,每3d取样测定果实品质与耐贮性指标。结果表明:与对照樱桃番茄果实相比,激光微孔保鲜袋包装能降低果实呼吸与乙烯高峰,保持较低的果皮皱缩指数、果实失重率,而提高果实的商品率;另外,还可维持樱桃番茄果实较高的果肉可溶性固形物、维生素C、可溶性总糖、可滴定酸含量。因此,激光微孔保鲜袋包装能保持樱桃番茄果实采后品质,提升果实采后耐贮性。 相似文献
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果肉软化和褐变是李果实长期冷藏时的主要问题。以‘安哥诺’李为材料,采用1-MCP(0.5μL.L-1)、薄膜(30μm厚)包装(MAP)及包装内加入乙烯吸收剂(EA)的方法,研究了0℃冷藏期间‘安哥诺’李品质、褐变及其生理生化的变化。结果表明,与对照(未进行处理)相比,1-MCP、MAP和MAP+EA及其组合处理延缓了果肉软化,抑制可溶性固形物(SSC)和花青苷含量上升,保持果肉较高的白度指数,降低果肉褐变度、酚含量和多酚氧化酶(PPO)活性,1-MCP+MAP+EA的复合处理效果最佳。这些说明,采后进行1-MCP、MAP和EA的复合处理能有效抑制果肉软化和褐变,改善了果实贮藏品质。 相似文献
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蔗糖磷酸合成酶与香蕉果实成熟、衰老的关系 总被引:5,自引:0,他引:5
研究了正常成熟、成熟抑制和促进成熟处理的香蕉果实蔗糖磷酸合成酶( SPS) 与呼吸速率、硬度及蔗糖形成的关系。结果表明: (1) 使用乙烯吸收剂不仅极显著抑制了呼吸速率、果实软化和蔗糖的积累(P < 0.01) , 同时抑制了SPS的活性, 与正常成熟果实相比, 其SPS活性高峰延迟3 d出现, 酶活性明显降低。(2) 丙烯处理不仅使SPS活性高峰比对照提前9 d出现, 而且促进了呼吸速率的提高, 加速了硬度的下降和蔗糖的积累。表明SPS与香蕉果实的成熟、衰老和糖的积累及果实软化等有密切的关系。 相似文献
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采后处理对青梅果实的生理和品质的影响 总被引:4,自引:0,他引:4
测定了青梅采后室温贮藏下生理和品质的变化 ,研究了采后处理对梅果室温和冷藏后转入常温的贮藏效果。结果表明 ,采后果肉急速软化 ,可滴定酸迅速下降。各处理对青梅果实的保鲜效果以乙烯吸收剂处理效果最好 ,其次是GA3处理。CaCl2 处理浓度以 2 %为宜 ,热空气处理的时间不能超过 2d 相似文献
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E. Giraldo M.J. Szczerbanik K.J. Scottpez J.E. Paton D.J. Best 《The Journal of Horticultural Science and Biotechnology》2013,88(2):162-166
SummaryStorage of the ‘Nijisseiki’ cultivar of Japanese pears was studied over three seasons for periods up to 36 weeks at 0°C. Storage in 50 μm thick low-density polyethylene (LDPE) bags at 0°C considerably delayed yellowing in all experiments, even after fruit was removed to 20°C for 1 week at the end of storage. The addition of an ethylene absorbent made from potassium permanganate on aluminium oxide (Purafil II) further delayed yellowing. Carbon dioxide levels in both treatments varied, but were generally in the range 2–3%. Oxygen levels remained high, generally 16–19%. In bags without Purafil, ethylene levels rose slightly during storage and were generally about 0.15 μl l–1. When Purafil was included in the bags, the ethylene level was reduced 10-fold or more. A sensory test indicated that the use of LDPE bags and ethylene absorbent resulted in fruit with better eating quality than fruit stored in air. Disorders over the 3-year investigation were low even after long-term storage. The use of polyethylene bags reduced the severity of flesh browning, and flesh spot decay was virtually absent. The use of bags increased the severity of core browning. Inclusion of an ethylene absorbent in bags reduced the severity of disorders, particularly core browning. Treatment of the fruit with 1-methylcyclopropene (1-MCP), before or during storage, resulted in higher ethylene levels in the polyethylene bags. At the concentrations used, 1-MCP did not improve the storage of ‘Nijisseiki’ compared to the use of polyethylene bags with Purafil II. 相似文献
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John C. Fidler 《The Journal of Horticultural Science and Biotechnology》2013,88(3):178-188
When apples begin to ripen after gathering, volatile products are given off. Some of these account for the smell of the fruit; another is the gas ethylene. These volatile products affect the rate at which the apples ripen, and are probably also responsible for such diseases of storage as superficial scald and spotting of the lenticels. The volatile products tend to collect in the atmosphere of the store and hence also m the fruit, particularly with tight packing or when the ventilation is restricted, as in gas storage. It is necessary to use oiled paper wraps in gas-storage, to prevent scald, but this is a laborious and somewhat costly procedure. It is hoped to reduce the amount of the volatiles in the atmosphere of the store, and thus to control scald, by employing a filter containing some material to absorb the volatiles. The filter would have the atmosphere of the store circulated through it, and could be fitted either inside or outside the store.This paper describes an investigation, the first of its kind, of the amounts of the volatile products occurring in the atmosphere of gas-stores under present methods of operation. The main feature is the suprisingly high concentration of ethylene found in the stores. The amount present would, in ordinary air, be expected to cause stimulation and acceleration of ripening.This raises the question whether, if ethylene could be removed, further benefits in delay of ripening could be obtained. 相似文献