共查询到19条相似文献，搜索用时 189 毫秒
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纳米果蜡对两种枣常温保鲜效果的影响 总被引：2，自引：0，他引：2
用纳米果蜡涂膜处理灵武长枣和中宁圆枣,观测常温贮藏条件下两种枣失水率和转红指数的变化.结果表明:涂膜处理显著的抑制了灵武长枣和中宁圆枣的失水和枣果的转红速度,延长了枣果的货架期.对于中宁圆枣,涂膜结合PE保鲜袋处理效果最佳,而对于灵武长枣,单独PE保鲜袋包装保鲜效果优于涂膜+PE保鲜袋包装. 相似文献
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以'灵武长枣'为试材,采用田间处理结合酶学技术,研究了叶面喷施不同浓度的聚谷氨酸对坐果率、果实中糖分积累以及果实品质的影响,以期为提高枣果的产量和品质提供参考依据.结果 表明:在初花期叶面喷施聚谷氨酸可提高坐果率和果实中转化酶、蔗糖合酶、蔗糖磷酸合酶以及质膜ATPase活性;在果实采收时,0.12g·L-1的聚谷氨酸处理显著提高了平均单果质量,使果实中可溶性总糖、花色苷含量极显著提高,枣树产量和果实品质也显著提高.因此,在初花期,叶面喷施适当浓度的聚谷氨酸可通过提高坐果率、果实中糖分积累关键酶活性,来提高'灵武长枣'果实的产量和品质. 相似文献
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以灵武长枣为试材,在0±0.5℃、相对湿度90%的条件下,研究不同浓度(1%、2%、3%)壳聚糖涂膜处理对灵武长枣保鲜效果的影响。结果表明:壳聚糖涂膜处理对灵武长枣具有一定的保鲜作用,不同浓度的壳聚糖,保鲜效果不同,其中2%壳聚糖涂膜处理对灵武长枣的保鲜效果最佳,在贮藏末期,灵武长枣硬度最大,为11kg/cm2;失重率仅为9%,是对照处理的1/4;可滴定酸含量最高,为1.5%;相对电导率最小,为63%。 相似文献
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2017年,对‘灵武长枣’迚行行间生草试验,共设5个生草处理,分别为自然生草及行间种植紫花苜蓿、百脉根、黑麦草、白三叶草,以清耕为对照,探讨行间生草对‘灵武长枣’生长及果实品质的影响。结果表明:行间生草对‘灵武长枣’树高、地径、枣吊长度、叶片叶绿素含量有抑制作用,能控制树体营养生长,同时能提高果实维生素C含量,降低果实黄酮含量,改善果实品质;在坐果率方面,除行间种植黑麦草处理明显高于对照(清耕)外,其他4个生草处理均低于对照。综合来看,‘灵武长枣’行间种植黑麦草处理的树高适中、枣吊粗壮、叶面积较大、坐果率高、果实品质佳,推荐其作为生产种植的首选草种。 相似文献
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大平顶枣采后生理特性研究 总被引：11，自引：2，他引：11
研究了不同成熟度大平顶枣采后在20、4.5、1.5、0、-1.5℃条件下呼吸强度、品质、脆枣率等变化情况。枣果分别于9月14日和24日两批采摘。结果表明:大平顶枣属非跃变型果实,全红果呼吸强度显著高于半红和初红果。在4.5～-1.5℃的范围内,以1.5℃为界,温度越低,贮藏后期果实维生素C含量和脆果率越低,果皮叶绿素含量下降越快,贮藏30、39d,1.5℃贮藏效果最好,4.5℃适宜10d左右短期贮藏,大平顶枣不适宜在0℃以下贮藏。反映枣果贮藏效果的主要指标是枣果维生素C含量和脆枣率,贮藏过程中鲜枣维生素C含量与脆果率之间呈极显著正相关,脆果率与货架期呼吸强度间呈极显著正相关。 相似文献
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《中国果树》2014,(1)
以大果型、枣刺退化型、早熟型、普通型4个类型灵武长枣果实为试材,测定了4个类型果实中葡萄糖、果糖、蔗糖、淀粉含量及蔗糖代谢相关酶活性,探讨不同类型灵武长枣果实糖积累的差异。结果表明,4个类型灵武长枣果实糖积累类型均为糖直接积累型,快速膨大期以积累葡萄糖和果糖为主,成熟期以蔗糖迅速积累为主,在发育过程中蔗糖含量均呈递增趋势,果糖和葡萄糖的积累量存在较大差异;不同类型灵武长枣果实酸性转化酶、蔗糖合成酶(合成方向)活性随果实成熟、蔗糖积累而下降,中性转化酶、蔗糖合成酶(分解方向)和蔗糖磷酸合成酶活性变化各有不同;果实所积累糖的含量和比率的不同是不同类型灵武长枣果实品质差异的主要原因。 相似文献
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灵武长枣多糖含量的变化规律 总被引：1，自引：1，他引：0
以3a生灵武长枣树的枣果、当年生茎和叶为试材,采用分光光度法,研究不同发育时期灵武长枣果实中多糖的含量变化规律及其多糖动态积累的相关性.结果表明:不同发育时期叶片中的多糖含量达到极显著差异,在果实的坐果期达到最高值,膨果期末降至最低值,从着色期开始多糖含量有所增加;茎中多糖含量变化差异不显著;果实中多糖含量在坐果期、膨果期和着色期变化平稳,成熟期急剧升高至积累高峰,含量为12.33％;随着果实发育成熟,外果皮和中果皮中的多糖含量逐渐升高,并存在极显著差异,而内果皮中多糖含量呈先上升后下降的趋势.表明,灵武长枣果实多糖主要在果实的膨果期积累,成熟期时多糖含量最高,中果皮为多糖积累的主要部位,果实中多糖的积累与茎和叶存在一定的相关性. 相似文献
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振动胁迫对杨梅果实采后衰老生理的影响 总被引：18，自引：0，他引：18
振动胁迫促进杨梅果实的衰老，表现为促进膜诱性的增加和ＳＯＤ活性与精胺含量的下降。但在振动胁迫后的贮藏初期，果实多源精胺的合成明显增加，而乙烯产生量明显降低，这可能是杨梅果实抗振动胁迫的一种应激机制。而在振动胁迫后的贮藏后期，果实的精胺含量降低，腐胺积累较多，乙烯产生量较高，表明振动胁迫最终促进果实的全面衰老。 相似文献
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本研究以‘槜李’果实为材料,分别进行外源乙烯、减压浸钙和低温贮藏处理,研究各处理条件下‘槜李’果实成熟软化过程中硬度、乙烯释放量、ACS和ACO活性等指标的变化。结果表明:‘槜李’果实软化过程中,硬度逐渐降低,乙烯释放量和ACS活性的峰值同时出现在软化后期;外源乙烯(0.5μl·L^-1)处理后,果实硬度迅速下降,乙烯跃变提前,乙烯释放量增大,ACS活性增强,促进果实迅速软化;用2%CaCl2溶液浸泡处理显著减缓果实软化,降低乙烯释放速率;低温贮藏显著抑制果实硬度下降,表明一定条件的低温贮藏对乙烯释放速率及其相关酶活的控制效果极为显著。 相似文献
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豫园翠玉是以四倍体SB-1为母本,RB-5为父本配制而成的中晚熟、高产、抗病、优质无籽西瓜新品种。全生育期105 d(天),果实发育期35 d(天)左右。植株生长势中等偏强,分枝力适中,第1雌花着生于主蔓第6~10节,以后每隔5~6节再现雌花,坐果率高。果实圆形,果形指数1.01,果皮浅绿色覆黑条带,皮厚1.4 cm,果皮硬度大于25 kg.cm-2,耐贮运,单果质量4~5 kg,最大果7 kg以上。果肉大红色,肉质脆沙,纤维少,无籽性好,白秕籽少,不空心,中心可溶性固形物含量12.63%。对病毒病的抗性强于黑蜜2号,对炭疽病、枯萎病的抗性与黑蜜2号相当。每667 m2产量2 000 kg左右,适合河南、山东、四川、河北、山西等省无籽西瓜种植区域栽培。 相似文献
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青梅果实采后的软化特性与色泽变化 总被引：6，自引：0，他引：6
以青佳品种为试材研究了青梅在25℃±1℃、相对湿度85%贮藏条件下果实采后软化特性及色泽变化。结果表明:采后6～8d,青梅果实呼吸强度和乙烯释放量均出现高峰,表明果实属于呼吸跃变型;采后6d内,果肉硬度和叶绿素含量迅速下降,膜相对透性迅速增大,果肉色泽急剧转黄,表明6d内青梅果实易快速软化和黄化,在常温下仅能保鲜5d左右。采后2～4d,多聚半乳糖醛酸酶(PG)、果胶甲酯酶(PME)和羧甲基纤维素酶(Cx)活性升高,这可能是果肉急剧软化的主要原因。 相似文献
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L. J. Von Mollendorff G. Jacobs O. T. De Villiers 《The Journal of Horticultural Science and Biotechnology》2013,88(5):655-662
‘Independence’ nectarines were stored at — 0.5°C for three or four weeks or at 3°C for four weeks or kept at room temperature for 18 h prior to storage for four weeks at -0.5°C. After cold storage, fruit from all treatments was ripened at 10°, 15°or20°C. In all treatments the percentage woolly fruit initially increased to high values and thereafter decreased with further ripening. The rate of increase and decrease in woolliness depended on the ripening temperature. A storage period of four weeks at — 0.5°C resulted more woolliness during subsequent ripening. Woolliness persisted longer after a four-week cold storage period than after a three-week one. When fruit was delayed at room temperature prior to cold storage, woolliness generally developed earlier and to a lesser extent during ripening. At all ripening temperatures initial storage at 3°C resulted in most woolliness extending over the longest period. In addition, browning of the meso- carp tissue occurred only in fruit cold stored at 3°C.-The delay period before cold storage decreased fruit firmness by 15.7 to 17.6 N. Except for fruit subjected to the delay period, the extractable juice in fruit of all treatments first decreased during ripening to low values then increased. 相似文献
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灵武长枣贮藏的关键技术研究 总被引：2，自引：0，他引：2
针对灵武长枣采后极易失水软化、酒化、腐烂等因素,采后常温和单纯的低温下保鲜期短等技术难点,重点研究长枣"低温+MA微孔膜+专用防腐剂+生理调节剂"的综合保鲜工程技术。采用10%KDZ+100μg·g-12,4-D;10%KDZ+1%CaCl2;10%KDZ+100μg·g-1GA3;1μL·L-11-MCP熏蒸24h+10%KDZ处理枣果,装入保鲜袋,在0℃进行长枣贮藏研究,以单独KDZ处理枣果装入保鲜袋置于0℃贮藏为对照。结果表明,1-MCP结合KDZ处理和CaCl2结合KDZ处理的保鲜效果最佳,0℃保鲜90d还原糖含量达12.4%,维生素C分别为2409mg·kg-1和2539mg·kg-1,好果率77.9%和79.3%,并且果实饱满、色泽鲜艳、口感鲜脆、汁液丰富。 相似文献
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增施钾肥对油葵产量的影响 总被引：4，自引：0，他引：4
通过田间试验在宁夏灵武农场研究了增施钾肥对油葵产量的影响,以期为指导当地农户的合理施肥提供依据。结果表明:与对照比较,N、P处理和N、P、K处理均降低了油葵的空粃率,提高了油葵的千粒重,显著提高油葵的产量。N、P处理和N、P、K处理的产量分别比对照提高了37.2%和73.0%。同常规只施用N、P处理比较,增施钾肥(N、P、K处理)油葵产量提高了26.1%,差异达到显著水平。在当地土壤肥力条件下要进一步提高油葵的产量,增加经济效益,必须改变农民的传统施肥习惯,增施钾肥,平衡施肥。 相似文献
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Firmness is a primary measure of apple fruit texture, the key determinant of eating quality of apples. Despite the well developed understanding of the process of firmness loss in storage, there is very limited information concerning pre-harvest and at-harvest causes of the variation in fruit quality in the marketplace. The objective of the present study was to investigate the respective roles that the factors of time and intensity of crop thinning, fruit size and fruit dry matter concentration (DMC) each may have in determining fruit firmness of ‘Royal Gala’ apple at harvest and during storage. Loss of firmness during storage of all thinning treatments and of fruit size and DMC categories was described by a bilinear equation. Time of thinning did not influence any aspect of fruit softening during air storage at 0.5 °C. Comparing the crop loads, a lower crop load (100 fruit per tree) resulted in firmer fruit at harvest. The loss of firmness during storage associated with crop load occurred because fruit from the lowest crop load softened more rapidly during the second slow phase of softening. Fruit firmness was positively correlated with fruit size where larger fruit were slightly firmer than smaller fruit at harvest but not after storage. The softening profiles of different sized fruit were similar except for a class of extremely small fruit, which appeared to soften more rapidly during the second slow softening phase of storage. Both at-harvest and post-harvest fruit firmness were influenced by fruit DMC. Fruit firmness at harvest increased significantly as fruit DMC increased from 13% to above 16%. Despite having significantly different initial firmness, all fruit classes with DMC higher than 13% softened at a similar rate during both the initial rapid and second slow softening phases and the transition between the two phases occurred after the same time in storage. In contrast, fruit with very low DMC, less than 13%, had a greater rate of softening in the second phase. These results indicate that variation in fruit firmness at harvest and after storage is influenced by processes that affect and alter fruit DMC during fruit development. In this respect crop load control, which is used to improve fruit size, was also an important factor in altering fruit DMC, thereby affecting firmness at harvest and after storage. Furthermore, the effects of DMC on fruit firmness were independent of fruit size. 相似文献