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新红星苹果盛花期、幼果期、盛花期+幼果期喷200倍果形剂试验,结果盛花期喷可提高果实的果形指数,增加五棱突起果的比例。三个时期处理对果肉硬度、单果重和可溶性固形物均无影响。 相似文献
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以“520”梨和“晚香”梨为试材,研究了不同贮藏条件对果实硬度和PPO酶活性的影响.结果表明:低温且外包保鲜袋的梨果实,果肉软化速度相对缓慢;与对照相比,对于外包有保鲜袋和没有保鲜袋的处理,在不同温度下,温度越低,PPO酶的活性越低,果实软化速度越慢;不同贮藏温度对梨果实的硬度和PPO酶活性的变化均具有一定程度的影响,低温与保鲜袋的结合处理可以保持梨果的硬度. 相似文献
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套袋对富士苹果果实发育期光合同化物积累的影响 总被引:2,自引:0,他引:2
以富士苹果为试材,进行不同时期的果实套袋和摘袋处理,以不套袋果实为对照,测定了果实中重要光合同化物的积累,分析比较了套袋对果实中糖分积累和转化的影响。试验结果表明:套袋提高了果实的单果重,降低了果实早期的淀粉积累速率,缩短了积累持续时间;在发育早期,套袋果实中蔗糖、葡萄糖、果糖的含量和变化趋势与不套袋的对照果实基本一致;在果实发育后期,套袋果实中蔗糖和葡萄糖的含量明显降低;合适的摘袋时间有利于提高果实中蔗糖和果糖的含量,改善果实品质,但过早摘袋不利于蔗糖和果糖的积累。反季节套袋也证实了果实后期的遮光处理不利于蔗糖和果糖的积累。 相似文献
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以0.2%的氮磷钾复合肥与0.003%的纳米几丁质水悬浮液按不同体积比例混配,于圆黄梨幼果期喷施2次,中间间隔10天,研究其对梨果品质的影响。结果表明,二者以0.75∶1混配喷施,比喷施其他混配比例、单喷复合肥、单喷纳米几丁质的果实综合品质指标均佳。比单喷0.2%复合肥的单果重提高12%;果实中蔗糖含量提高42.2%;蔗糖合成酶活性提高1.1倍;蔗糖磷酸合成酶活性提高1.08倍,均差异显著。说明纳米几丁质与肥料配施具有协同增效的作用,起到改善果实品质的效果,且比常规施肥节肥。 相似文献
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果园地面覆盖对苹果果实品质和矿质营养的影响 总被引:2,自引:0,他引:2
以‘华红’苹果为试材,研究了果园地面覆盖方式对果实品质和矿质营养含量的影响。结果表明,覆盖能降低果实可滴定酸含量,提高单果重、可溶性固形物含量和维生素C含量,改善果实质地,增加果实磷、钙、镁、硼、铁、铜含量。稻壳炭覆盖、秸秆覆盖和生草覆盖可溶性固形物含量和可溶性糖含量分别比清耕(对照)高2.69%和4.77%以上。稻壳炭覆盖果皮穿刺强度最大,地布覆盖果肉坚实度和果肉纤维指数最大。果实钾、钙、镁含量以稻壳炭覆盖最高,氮、磷、铁含量以生草覆盖最高,钙、硼含量以秸秆覆盖最高。 相似文献
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对新红星、金冠等5个品种果实生物学指标在果实成熟和贮藏期变化规律进行了研究,并对其各自在判断果实成熟和确定采收适期中的作用和意义进行了评价。认为果实糖和酸含量、糖酸比例、可溶性固形物、维生素C等项指标只能指示果实品质的优劣;果肉硬度在果实成熟衰老过程中变化激烈,但进入成熟期有一缓慢变化时间,也降低了其判断成熟的精确性,只可作为参考指标;果实淀粉的消长规律直接反映果实的成熟状态,是果实成熟的重要标志。果实剖面淀粉磺-碘化钾染色面积大小,在一定程度上指示了果实成熟度,不同品种有其特定染色图谱。 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
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用磁化水处理红星苹果,能明显地保持红星苹果果实在贮藏期的硬度和可溶性固形物的含量,对呼吸强度有明显的抑制作用,从而提高红星苹果贮藏品质,延长果实寿命。 相似文献