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叶面喷施硒肥对“红阳”猕猴桃果实品质的影响 总被引：2，自引：0，他引：2
《中国南方果树》2016,(2)
以6年生的"红阳"猕猴桃为试材,研究叶面喷施硒肥对猕猴桃硒含量、果实性状和品质的影响。结果表明,叶面喷施硒肥猕猴桃硒含量为0.081~0.397mg/kg,较对照提高2.0~13.7倍,效果显著。喷施适量硒肥可增加猕猴桃单果质量,降低果形指数;显著提高果实维生素C含量、蛋白质和可溶性糖含量,降低可溶性固形物含量和总酸含量。综合分析得出叶面喷施硒肥可有效提高"红阳"猕猴桃硒含量和品质,最佳用量为4~6g/667m2。 相似文献
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探讨多效唑对'库尔勒香梨'枝条生长过程中内源激素含量的影响,为有效控制'库尔勒香梨'枝条徒长和提高抗寒能力奠定基础。于盛花后25 d对'库尔勒香梨'新梢喷施不同浓度多效唑,定期测定枝条内源ABA、GA、IAA、ZR含量,分析不同浓度多效唑对其动态变化的影响。结果表明:喷施不同浓度多效唑后,'库尔勒香梨'枝条内源ABA含量均呈逐渐增加趋势,GA含量呈现"下降—升高—下降"趋势,IAA含量呈"上升—下降"趋势,ZR含量呈"上升—下降"趋势,ABA/GA值呈持续上升趋势,同时提高了枝条抗寒性;1 500、2 000 mg/L多效唑的施用可提高休眠期'库尔勒香梨'枝条内源ABA含量及ABA/GA值,降低枝条内源GA含量,同时对控制'库尔勒香梨'枝条徒长及提高抗寒性有显著作用。 相似文献
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猕猴桃果实不同部位间果实品质的差异性分析 总被引：1，自引：0，他引：1
为探究猕猴桃果实不同部位间主要果实品质的差异,以猕猴桃品种'红阳'金果'金艳'为试材,通过套袋和未套袋处理,测定其果实不同部位间主要果实品质并进行差异性分析。结果表明:不同猕猴桃品种间果实主要品质存在较大差异,同一品种其果实不同部位的主要果实品质也存在较大差异;未套袋处理的'红阳'果实以其上部(果基)综合品质最佳,'金果'为下部(果顶),'金艳'为中部;套袋处理后,'红阳'以果实中部综合品质最佳,'金果'为上部,'金艳'为下部。据此,在对果实品质进行测定时,建议各部位均匀混合取样或者取相同部位的样品;套袋试验结果表明,套袋能增加'金果'猕猴桃干物质含量,提高'金艳'猕猴桃采摘期外果皮的硬度,且能促进'金果'和'金艳'猕猴桃软熟期的着色。 相似文献
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以露地和避雨栽培条件下的‘红阳’猕猴桃为试验材料,通过测定园地温湿度、植株光合作用、果实品质等指标,研究避雨栽培对‘红阳’猕猴桃生长微环境、叶片光合能力和果实品质的影响。结果表明:避雨栽培条件下植株环境温度降低2.4℃,空气湿度提高12.2%,光合有效辐射下降13.0%~28.6%;避雨栽培可维持‘红阳’猕猴桃在生长旺盛期的平均净光合速率,有效缓解植株光合"午休"现象,对植株有一定的保护作用,表现为结果枝数降低10.8%,结果枝长度增加60.8%,坐果数提高129.7%,叶绿素含量提高6.1%,单果重提高25.7%,采收期和软熟期可溶性固形物含量分别增加10.8%和14.1%,干物质含量无显著差异,延长了贮藏时间。综上,避雨栽培可改善‘红阳’猕猴桃生长微环境,优化植株光合作用,提高果实品质。 相似文献
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不同猕猴桃品种果实发育过程中总酚和类黄酮含量及抗氧化活性的动态变化 总被引：1，自引：0，他引：1
【目的】探讨不同猕猴桃品种果实发育过程中总酚、类黄酮含量及抗氧化活性的动态变化差异。【方法】以江西主栽的美味猕猴桃'金魁’和中华猕猴桃'红阳’以及本课题组自主选育的毛花猕猴桃'赣猕6号’为试材,对果实生长发育过程中总酚、类黄酮含量和FRAP抗氧化能力、清除羟基自由基(·OH)、DPPH自由基(DPPH·)和超氧阴离子自由基(·O2-)的能力进行检测分析。【结果】3个猕猴桃品种果实总酚和类黄酮含量在果实生长发育过程中大体呈现由高到低的变化趋势;但不同品种其含量差异显著,尤其'赣猕6号’总酚含量高于其他两个品种十几倍。对抗氧化活性检测发现',赣猕6号’比其他两个品种具有较强的FRAP抗氧化能力和清除超氧阴离子自由基(·O2-)能力。相关性分析显示',赣猕6号’清除·OH和·O2-能力与总酚、类黄酮含量存在极显著或显著相关性',金魁’FRAP抗氧化能力与总酚、类黄酮含量存在极显著和显著相关性,而'红阳’FRAP抗氧化能力、清除DPPH·能力分别与总酚、类黄酮含量存在显著和极显著相关性。【结论】猕猴桃果实含有丰富的酚类物质,随着果实的生长发育呈现逐渐降低的趋势。猕猴桃抗氧化能力与总酚、类黄酮含量呈显著正相关。毛花猕猴桃'赣猕6号’比美味猕猴桃'金魁’和中华猕猴桃'红阳’具有更高含量的酚类物质和更强的抗氧化能力。本试验为猕猴桃优良品种的推广、野生资源发掘、新品种选育、天然抗氧化保健药物以及功能性食品的开发奠定了基础。 相似文献
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《中国果树》2019,(5)
为研究S-诱抗素对'巨峰'葡萄果实生长、果实着色效果、果实品质、花青素含量及相关酶活性变化的影响,指导S-诱抗素在'巨峰'葡萄生产上合理使用,采用不同质量浓度(0、100、200、300、400 mg/L)的S-诱抗素在葡萄果实转色初期进行茎叶喷雾处理。结果表明:S-诱抗素处理后外观色泽得到有效改善,葡萄果皮着色指数(CIRG)、花青素、叶绿素含量显著提高;随着时间推移,果实可溶性固形物、维生素C含量有不同程度的提高,可滴定酸含量明显下降;花青素合成相关酶PAL、CHI活性提高。葡萄果实转色初期(第2次膨大期,转色面积为50%～10%)不同浓度S-诱抗素处理对葡萄着色存在低促高抑的影响,其中用300mg/LS-诱抗素茎叶喷雾处理1次作用效果最好。 相似文献
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据邹平县林业局两年实践表明,对2～5年生、生长旺、座果率低的桃幼树的结果枝组或母枝,在盛花期进行环剥,能减少落果,提高座果率29～34%;在生理落果期到果实膨大前环剥,可增加果重,增产21%左右,并提早上色,成熟期提前3～5天;且能增加枝条中下部芽成花。具体做法是:在结果枝组或结果母枝基部3～5 cm处环剥,宽度 0.2～0.6 cm,剥宽视枝条粗细而定(环剥过窄效果不明显,过宽则长期不愈合,甚至死枝)。此外应注意:①环剥只应用于旺长无花或结果少的树;②掌握剥后座果率提高,但不可结果过多;③剥后应加强肥水管理,确保树体生长健壮和提高环剥效果;④… 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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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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以大荔县冬枣种植区采集的发病枣果为试材,采用常规组织分离法进行病原菌的分离纯化,通过柯赫氏证病法则、形态学观察及分子生物学分析,研究鉴定了冬枣黑斑病和炭疽病的病原菌种类,并采用田间调查法对2种病害为害特征进行比较分析,以期为田间有效区分冬枣黑斑病和炭疽病为害症状,并快速判断其病原类型,及进一步深入开展精准防控提供参考和指导.结果表明:陕西大荔冬枣黑斑病的病原菌为细极链格孢(Alternaria tenuissima),炭疽病的病原菌为胶孢炭疽菌(Colletotrichum gloeosporioides).2种病害均主要为害枣果实,在枣果果腰或果肩上形成黑褐色病斑,可能同时存在且症状相近极易混淆,但在病斑表面、皮下及久置表型3个方面存在明显区别. 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