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研究了畜禽有机复合肥对瓜类作物产量与品质的影响。试验结果表明,基施嘉宝牌畜禽有机复合肥3.0～7.5t/hm2,瓜类作物收获后土壤速效K含量比CK增加155.59%～193.48%,同时显著提高了黄瓜的株高、茎粗、叶片数、功能叶面积和坐果率;黄瓜、西瓜和甜瓜产量随着有机复合肥施用量增加而增产,增幅为9.19%～27.16%,且黄瓜增产最为显著,黄瓜、西瓜和甜瓜的单位面积最佳经济施用量分别为7.5t/hm2、3.0t/hm2和4.5t/hm2;有机复合肥能提高黄瓜VC含量和西甜瓜中心糖度,显著改善其商品性和产品品质。 相似文献
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我国西瓜甜瓜嫁接育苗产业发展现状和对策 总被引：9，自引：2，他引：7
<正>西瓜和甜瓜是重要的瓜果类作物,我国是西、甜瓜生产和消费大国。中国农业统计资料显示[1],2009年全国西瓜播种面积176.48万hm2,总产量6478.5万t;全国甜瓜播种面积38.99万hm2,总产量为1215.3万t。另据世界粮农组织(FAO)统计,2009年我国西瓜种植面积221万hm2,总产量6820万t,分别占世界的58%和68%;2009年我国甜瓜播种 相似文献
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不同施氮水平对黄瓜产量和品质的影响 总被引：2，自引：0，他引：2
研究了青紫塥粘田上施用氮肥对黄瓜产量和品质的影响.结果表明,在磷、钾肥底肥的基础上.施用氮肥具有显著增产作用,但施氮量在450 kg/hm2以上产量极显著降低.施用氮肥对黄瓜卫生标准没有明显影响,黄瓜硝酸盐舍量符合生食标准(<432 mg/kg).施氮水平对黄瓜的品质影响很大,VC含量,可溶性蛋白质在一定范围内有所提高,但随氮肥的进一步增加呈下降趋势,可溶性糖舍量在450～600 kg/hm2 范围内有所增高.综合考虑作物产量、品质、生产成本、人体健康等因素,在本试验条件下,黄瓜氮肥施用量为300 kg/hm2左右为宜. 相似文献
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浙江省西瓜甜瓜产业情况(摘要) 总被引：1，自引：0，他引：1
《中国瓜菜》2014,(Z1)
<正>西瓜甜瓜是深受广大消费者喜爱的水果,也是浙江省重要的经济作物,浙江省西瓜年种植面积8.67万hm2左右,总产量237万t,产值50多亿元,基本稳定。其中大棚西瓜2.67万hm2,稳中有增,露地西瓜面积有所减少,甜瓜栽培面积维持在8 667hm2左右,产量26.6万t,比上年增加7.3%,产值约8亿元。目前,浙江省已形成台州、嘉兴、宁波、杭州、衢 相似文献
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黑龙江省西瓜甜瓜生产现状、存在的问题和对策 总被引：4，自引：2，他引：2
<正>西瓜甜瓜一直是黑龙江省农村发展商品经济的重要作物之一,为农民致富和农村发展发挥了重要作用。近年来,黑龙江省西瓜甜瓜生产面积稳定在21.5万hm2左右,总产量450万t,总产值30亿元左右。其中西瓜种植面积13万hm2 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