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套袋对“金艳”猕猴桃果实品质及贮藏性的影响 总被引：1，自引：0，他引：1
研究不同颜色果袋套袋对"金艳"猕猴桃果实品质和贮藏性的影响,为生产上提供可选的果袋,从而达到提质增效。结果表明,所有套袋处理较对照均能显著提高果实光洁度、商品果率;软熟时可溶性固形物含量最高是黄褐色单层袋处理,达到了17.15%,套袋能显著降低果实硬度,促进果实提前成熟,所有套袋处理的硬度和可滴定酸在后熟阶段呈连续下降趋势;可溶性总糖在后熟过程中呈直线上升趋势,不同颜色果袋套袋对果实的维生素C影响较大。综合果实品质及采后贮藏期间果实腐烂情况等因素,黄褐色单层袋处理对金艳猕猴桃果实品质最好,白色单层果袋处理果实品质最差,内黑外深褐色双层袋处理对果实在常温存贮下贮藏性表现最好。 相似文献
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套袋对苹果果实钙素吸收与分布的影响 总被引：11，自引：0，他引：11
以红富士苹果(Malus domestica Borkh.cv.Fuji)为试材,进行了套袋处理,以不套袋果实为对照,测定其果实的Ca含量,研究套袋对果实钙素吸收与分布的影响。结果表明,果实套袋后,在花后40～90d,整果钙吸收量高于对照果实;从花后120d开始,对照果实整果钙含量一直高于套袋果实。此外,苹果果实在整个生长发育过程中对Ca都有吸收,花后40d内,苹果果实吸收整果钙含量的20%左右;从花后40d(套袋)到90d,果实钙吸收量迅速升高,对照果实可吸收整果钙含量的66.1%,套纸袋果实可吸收整果钙含量的73.8%;此外,在果实的成熟期仍有少量的钙吸收。果实套袋后,果实各个部分的钙含量变化与对照果实相比,果皮中钙含量明显低于对照果实,而果肉和果心的钙含量却高于对照果实。 相似文献
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《落叶果树》2018,(6)
研究了在蒙阴地区不同时间套袋对惠民短枝富士苹果果实品质和病害的影响,以不套袋果为对照。结果表明,在5月5日、5月15日、5月25日、6月2日、6月12日的果实套袋处理中,单果重和果形指数均以6月2日套袋果的最大,分别为308. 1g、0. 868;果实去皮硬度以5月5～25日套袋的大于对照; 6月2日、6月12套袋的小于对照;可溶性固形物含量套袋果均低于对照,不同时间套袋处理间无显著差异;着色指数6月2日套袋果高达100%;光洁度指数5月5日套袋果96. 67%,最高;红色色度a*值套袋果均高于对照,各不同时间套袋果间无显著差异。套袋时间越早,果实的黑点病病果率和苦痘病病果率越高,均高于不套袋果。综合各项指标认为在山东省蒙阴地区以6月2日即盛花后45天套袋较好。 相似文献
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The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
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AIM：To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS：In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS：PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P＜0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION：This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
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小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引：2，自引：0，他引：2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
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钾肥在小白菜和萝卜上的施用效果 总被引：6，自引：0，他引：6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %～ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献
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Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献
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