共查询到20条相似文献，搜索用时 78 毫秒
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为探索设施蔬菜水肥高效利用模式,在日光温室条件下研究了不同水肥管理方式对番茄生长、产量、品质及经济效益的影响。结果表明:推荐滴灌模式处理的番茄植株粗壮,茎粗比常规畦灌模式、常规滴灌模式分别增加14.71%、2.24%;果实品质明显改善,VC含量比常规畦灌模式、常规滴灌模式分别增加22.76%、13.60%,可溶性总糖含量分别增加7.29%、5.10%,糖酸比分别提高25.16%、20.03%;节水节肥效果显著,比常规畦灌模式、常规滴灌模式分别节水52.38%、25.00%,节肥46.67%、31.03%;产量与常规滴灌模式相近,比常规畦灌模式增产5.38%;经济效益明显,比常规畦灌模式、常规滴灌模式分别增收28.87%、9.98%。 相似文献
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为了探索水肥耦合在设施番茄上的应用效果及其对肥料减施的贡献，采用田间试验，设置6个处理，研究了水肥耦合条件下底肥减施20%和40%、灌溉量减少15%的条件下对设施番茄产量、品质和土壤养分的影响。结果表明：中水中肥（W2F2）处理产量最高，显著高于其他处理，产量比高水中肥（W1F2）处理提高2.0%，比常规处理（W1F1）提高4.1%。中水中肥处理番茄可溶性固形物、维生素C、土壤有机质、碱解氮、有效磷、速效钾含量比常规处理分别提高1.5%、5.8%、6.5%、6.3%、4.5%、10.6%。说明中水中肥处理（80%常规施肥+滴灌至田间持水量的85%，每公顷每次施用51kg大量元素水溶肥随水滴灌4次）不仅能提高设施番茄产量，还能在一定程度上提高番茄品质和土壤养分含量，是设施番茄肥料减施最佳处理。 相似文献
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日光温室番茄肥药双减绿色栽培技术,集成运用椰糠条无土栽培番茄技术+全环境智能控制水肥一体化技术+物理防治病虫害技术,使土壤、棚体、种子均处于无菌状态,根据番茄不同生长时期精准施肥,对病虫害以预防为主,番茄在整个生育期不发生病虫害,不使用农药,产品合格率达99%。生产的番茄果肉沙面,甜酸可口,单果质量130~180 g,亩产量提高8%~10%。增产、增效,节药、节肥、节水、省工。 相似文献
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基于发育阶段的日光温室有机基质栽培番茄水肥一体化技术 总被引：2，自引：0，他引：2
《中国果菜》2017,(9)
水肥一体化技术是未来农业生产中具有广阔前景的新技术,设施蔬菜最具潜力发展水肥一体化技术。日光温室基质栽培番茄水肥一体化技术的核心是借助压力灌溉系统,将完全水溶性固体肥料或液体肥料,按日光温室基质栽培番茄生长各阶段对养分的需求和基质养分的供给状况配兑成肥液,与灌溉水融为一体,适时、定量、均匀、准确地输送到日光温室番茄的根部基质。本文简要介绍了基于发育阶段的日光温室基质栽培番茄水肥一体化技术要点,主要包括施肥总量的推荐、基肥用量的确定、滴灌水量的运筹方案、滴灌追肥的运筹方案等内容。该技术节水40%以上,减施化肥30%以上,提高氮肥利用率40%以上,增产10%以上,增收15%以上。 相似文献
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针对北京市果树生产水肥用量大、用工多以及环绕滴灌施肥技术参数不明的现状,采用裂区设计方法,研究了环绕滴灌施肥条件下不同灌溉施肥制度对果树生长、产量、水分利用及品质的影响。结果表明:采用环绕滴灌施肥技术,张力计读数为-25kPa时开始灌溉,每次灌水22.5~52.5mm,随水滴施水溶肥60~120kg/hm2的处理较好,与常规对照相比,节水29%、纯养分节约49%~67%,产量增加4.4%~8.5%,水分利用效率提高9.3~11.7kg/mm,可溶性固形物含量提高1.8~2.1个百分点。 相似文献
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为探究滴灌条件下水肥一体化技术对果树生产的影响,分别选择辽宁省不同生态区的‘富士’苹果、‘南果梨’‘早金酥’梨材料,进行田间对比试验,研究农民习惯灌溉施肥和滴灌减量施肥对果树产量、品质及水肥利用率的影响。结果表明,与农民习惯灌水施肥相比,不同果园滴灌减量施肥的产量提高21.93%、7.69%、6.67%,糖酸比提高8.58%、31.56%、21.43%,肥料的偏生产力(PFP)提高45.3%、41.5%、42.9%,水分利用率提高29.6%、23.6%、19.9%。因此,通过水肥一体化模式的应用能够实现节水减肥,提高果实产量和改善品质,生产中可根据果园实际情况,采用适宜的水肥一体化模式能够实现果树高产、高效和优质的目标。 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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