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以“青研一号”番茄为试材,采用苗期灌根方法,研究了不同浓度复硝酚钠灌根处理对番茄穴盘苗壮苗效果的影响.结果表明:各处理均使番茄幼苗株高不同程度地增加.复硝酚钠6 000倍液处理使幼苗茎粗、叶面积及G值显著高于清水对照.复硝酚钠3 000倍液处理使番茄幼苗的壮苗指数降低,而其它处理则相反.各处理的番茄叶片叶绿素含量、可溶性糖含量及根系活力均显著高于清水对照,都随着处理浓度的增大而增加,并且表现出低浓度促进,高浓度延缓的趋势.综合各因素,为培育壮苗,以幼苗二叶一心期施用复硝酚钠6 000倍液效果最佳. 相似文献
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不同浓度复硝酚钠处理对番茄穴盘苗的影响 总被引：1，自引：0，他引：1
以"青研一号"番茄为试材,采用苗期灌根方法,研究了不同浓度复硝酚钠灌根处理对番茄穴盘苗壮苗效果的影响。结果表明:各处理均使番茄幼苗株高不同程度地增加。复硝酚钠6 000倍液处理使幼苗茎粗、叶面积及G值显著高于清水对照。复硝酚钠3 000倍液处理使番茄幼苗的壮苗指数降低,而其它处理则相反。各处理的番茄叶片叶绿素含量、可溶性糖含量及根系活力均显著高于清水对照,都随着处理浓度的增大而增加,并且表现出低浓度促进,高浓度延缓的趋势。综合各因素,为培育壮苗,以幼苗二叶一心期施用复硝酚钠6 000倍液效果最佳。 相似文献
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黄腐酸钾、胺鲜酯和复硝酚钠是重要的生长调节物质,各自作为叶面肥单独应用在生产上取得了良好效果,为了研究其相互复配作为叶面肥组成成分的应用效果,以茄子幼苗为试材,以尿素、磷酸二氢钾、黄腐酸钾、胺鲜酯和复硝酚钠为原料组配成不同配方的叶面肥,以清水为对照,研究了不同配方叶面肥对茄子幼苗生长的影响,结果表明,不同配方叶面肥均有利于促进茄子幼苗地上部的生长,均能明显提高茄子幼苗的壮苗指数,4种叶面肥的壮苗指数与CK相比分别增加了27.26%、15.40%、22.16%、45.42%;在尿素、磷酸二氢钾和黄腐酸钾复配的基础上,添加胺鲜酯或复硝酚钠能明显促进茄子幼苗茎粗的生长,增加幼苗地上部与地下部干鲜质量和幼苗的根体积,但幼苗根长与CK相比分别减少了26.29%、24.19%;添加复硝酚钠处理比添加胺鲜酯的处理增加了11.76%的地下部干质量和4%壮苗指数,初步认为处理T4(尿素3 g·L-1、磷酸二氢钾2 g·L-1、黄腐酸钾0.06 g·L-1、复硝酚钠0.007 g·L-1)对培育茄子壮苗的效果相对较好。 相似文献
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三种肥料增效剂复配对樱桃番茄生长和品质的影响 总被引：1，自引：0，他引：1
以"金玲珑"番茄品种为试材,研究了复硝酚钠、DA-6、α-萘乙酸钠3种肥料增效剂复配后结合水肥一体化对连栋温室樱桃番茄生长和果实品质的影响。结果表明:3种肥料增效剂复配结合水肥一体施用,各处理与对照相比,均能促进樱桃番茄的株高,尤其是在生长前期,其中8mg·L~(-1)复硝酚钠+4mg·L~(-1)α-萘乙酸钠的处理对株高促进作用最明显,5mg·L~(-1) DA-6+8mg·L~(-1)复硝酚钠的处理次之。8mg·L~(-1)复硝酚钠+4mg·L~(-1)α-萘乙酸钠的处理对樱桃番茄的基部茎粗有明显促进作用,对樱桃番茄坐果数、坐果率、单果质量的影响差异性较小,对产量没有影响。各处理对樱桃番茄的维生素C含量有明显的增加,其中5mg·L~(-1)DA-6+4mg·L~(-1)α-萘乙酸钠,5mg·L~(-1)DA-6+8mg·L~(-1)复硝酚钠,8mg·L~(-1)复硝酚钠+4mg·L~(-1)α-萘乙酸钠相比较对照分别提高35%、119%、139%。 相似文献
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赤霉素对萝卜种子萌发及幼苗生理特性的影响 总被引：1，自引：0，他引：1
以萝卜品种"洛育201"种子为试材,采用不同浓度(0、5、10、20、30、40mg·L~(-1))的赤霉素(GA3)对萝卜种子及幼苗进行处理,研究了GA3对萝卜种子发芽率及幼苗生长的影响。结果表明:不同浓度GA3可以促进萝卜种子萌发,能够显著提高萝卜幼苗根长、根系活力、株高,叶绿素、可溶性蛋白质含量,可显著降低丙二醛含量。GA3浓度为20mg·L~(-1)时对萝卜种子萌发的促进作用最大,GA3浓度为10mg·L~(-1)时对萝卜幼苗生长的促进作用最大。 相似文献
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以番茄品种合作903为试验材料,设置0、0.1、0.2、0.4 mmol · L~(-1 )亚精胺(Spd)浸种10 h,研究不同浓度Spd浸种对番茄种子萌发、幼苗生长及高温抗性的影响。结果表明:不同浓度Spd浸种处理均能显著提高番茄种子的发芽指数和活力指数,幼苗地下部干质量和壮苗指数明显提高,其中0.2 mmol · L~(-1 )Spd浸种处理发芽最快,活力指数最高。Spd浸种处理降低了高温胁迫下番茄叶片的相对电解质渗透率、丙二醛(MDA)和H_2O_2含量,其中0.2 mmol · L~(-1 )Spd处理的相对电解质渗透率、MDA和H_2O_2含量最低;抗氧化酶(SOD、APX、DHAR)活性增加,并在0.2 mmol · L~(-1)时达到最大值。综上,0.2 mmol · L~(-1 )Spd浸种能有效促进番茄种子萌发和幼苗生长,提高番茄幼苗高温抗性。 相似文献
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于苗期采用灌根处理的方法,研究了碧护、生根粉、超级矮丰王、金云大-120、复硝酚钠、甲壳素对秋季番茄幼苗生理指标、植株营养生长以及产量的影响。结果表明,生根粉处理后番茄秧苗质量显著增加;碧护、金云大-120、复硝酚钠、甲壳素处理,均不同程度地增加了番茄幼苗的株高、茎粗、叶面积、根冠比、G值、壮苗指数及叶绿素含量。定植后,各生长调节剂处理均可促使植株生长势增强,增加现蕾数;生根粉处理显著增加番茄前期产量、平均单果质量及总产量。因此,番茄越冬茬栽培中,为培育壮苗,于幼苗1叶期施用生根粉100倍液效果最佳。 相似文献
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芸苔素内酯对低温胁迫下樱桃五彩椒种子萌发及幼苗抗逆性的影响 总被引：3，自引：0，他引：3
五彩椒低于15℃不易发芽,早春栽培樱桃五彩椒时温度较低,影响种子萌发及幼苗生长。该试验采用0.01、0.05、0.10、0.50mg·L~(-1)的芸苔素内酯溶液处理樱桃五彩椒种子及幼苗,测定了五彩椒种子的发芽率、发芽势、发芽指数和活力指数,及五彩椒幼苗的SOD、POD、CAT活性,脯氨酸和丙二醛含量等生理生化指标,以研究芸苔素内酯对樱桃五彩椒种子萌发及幼苗抗低温能力的影响。结果表明:当芸苔素内酯浓度为0.10mg·L~(-1)时可促进樱桃五彩椒的萌发,当芸苔素内酯浓度为0.05mg·L~(-1)和0.10mg·L~(-1)时可提高五彩椒幼苗抗氧化酶(SOD、POD、CAT)的活性及脯氨酸含量、降低丙二醛含量;因此适宜浓度的芸苔素内酯可以促进樱桃五彩椒种子萌发,提高幼苗的抗低温能力。 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