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圆春甘蓝是露地越冬甘蓝杂交一代新品种。甘蓝杂交制种往往出现双亲花期不遇、制种产量低、产量不稳现象,为确保制种户的经济收益和大面积生产用种需要,经多年试验和示范,总结出一套适宜圆春甘蓝露地越冬高产杂交制种技术,从制种地块的要求与选择、亲本种子质量、播期选择、培育壮苗、亲本的定植比例、定植后管理、越冬前后田间管理、病虫害防治、去杂去劣、种子收获等方面进行了介绍。 相似文献
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为筛选出适宜在辽宁盘锦地区种植的高产优质早春甘蓝新品种,作者引进12个甘蓝品种开展了露地栽培试验。试验结果表明,七号兰朵和前途甘蓝品种为中熟品种,表现出球形圆正、叶球亮绿紧实、抗性好、产量高、品质好,可作为优质甘蓝品种在当地推广种植。 相似文献
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目前衡阳地区春甘蓝主栽品种为熟性晚、叶球大的京丰一号等扁球型甘蓝,缺少早熟优质的圆球型结球甘蓝品种。为筛选出适合衡阳地区种植的早熟优质圆球型春甘蓝新品种,湖南省衡阳市蔬菜研究所院士专家工作站从中国农业科学院蔬菜花卉研究所甘蓝育种团队引进了6个春甘蓝品种开展了品种比较试验。试验结果表明,中甘21、中甘628、中甘D22和YR中甘21平均产量达3 000 kg/667 m2以上,且植株生长整齐,纯度高达100%,叶球绿色坚实,较耐裂球,叶质脆嫩,品质优,抗病性强,适宜在衡阳地区春季大面积推广种植。 相似文献
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作者引进11个春甘蓝品种进行比较试验，通过比较其丰产性、抗逆性、商品性、适应性等性状，并结合现场鉴定和综合评价，筛选适合湖南地区种植的早熟优质、圆球型春甘蓝品种。试验结果表明，各参试春甘蓝品种从定植到终收需56～62 d，属早熟品种，平均株幅为40.0 cm×51.7 cm，平均株高为23.3 cm，叶面蜡粉少，外叶形状近圆球形、有光泽，叶球均为圆球形、顶部圆、纵径为16.3～18.8 cm、横径为15.6～17.6 cm、紧实、外绿内黄，口感甜、细嫩，品质优，其中23-C7、23-C2、23-C10、23-C5、23-C4熟性早，且叶球大、产量高。综合来看，23-C7、23-C2、23-C10、23-C5、23-C4、23-C6、23-C3表现较好，在生育期、植物学性状和产量等方面优于23-C11(ck);23-C9、23-C8、23-C1的产量虽略低于23-C11(ck)，但熟性早，从定植到终收仅需56 d，上市早，经济效益较好。由此可见，各参试春甘蓝品种均可在湖南地区大面积推广，建议根据上市时间搭配种植。 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