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《长江蔬菜》2020,(16)
为探究多茎菜用油菜组合对油菜薹产量的影响,以11个不同程度的多主茎组合为供材,以单茎品种2098为对照,分别于2020年1月7日、2月15日、3月1日和3月12日各采薹1次,每次采薹均进行测产。试验结果表明,一季4次采薹,菜薹产量最高的为2087,产量达到1 740.68 kg/667 m~2,比对照显著增产62.84%;11个多茎菜薹组合菜薹产量均高于对照,增幅在2.84%～62.84%,多茎率与菜薹产量呈正相关关系,说明多茎新材料与新组合具有较强的发展潜力和较大的发展空间;采薹总产量与每次采薹产量均呈正相关关系,且与第1次和第2次采薹产量呈极显著正相关的关系,说明第1次和第2次采薹产量对采薹总产量的影响较大。 相似文献
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为明确氮肥用量对菜用油菜薹产量和品质的影响，以薹用油菜大地95为研究对象，设置不同梯度氮肥用量处理，比较分析各处理菜薹的产量、品质、养分积累量。结果表明，施氮显著增加油菜薹薹长、薹粗、薹叶片数，进而提高油菜薹产量，当氮肥用量为135 kg/hm2时，油菜薹产量达到最高，为25.19 t/hm2，相应地油菜薹氮素积累量也达到最大，为89.7 kg/hm2。氮肥用量对油菜薹蛋白质、可溶性糖、维生素C、硝酸盐及膳食矿质元素存在显著影响，在适宜的氮肥用量范围内(135～180 kg/hm2)施氮对油菜薹内在整体品质具有明显改善效果。综上，本研究明确了氮肥施用量对薹用油菜产量和品质的影响具有协同性，施用适量氮肥既能提高产量又能提高油菜薹品质，以产量为依据的最佳推荐施氮量为161 kg/hm2。 相似文献
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为了探究不同施钾技术对甘蓝型油菜菜薹产量和品质的影响,笔者通过对高钾含量品种(玉油7号)、较高钾含量品种(中双8号)和低钾含量品种(保油10号)进行不同施钾处理,摘取菜薹进行产量和品质指标测定。结果表明,不同施钾处理能提高菜薹产量,玉油7号产量有所增加,但其产量远低于其他2个油菜品种,中双8号在T3处理下菜薹产量最高(20.66 kg·小区-1),保油10号在T8处理下菜薹产量最高(23.30 kg·小区-1);中双8号在T1处理下菜薹可溶性糖和可溶性蛋白质含量最高,T3处理下钾含量最高,T4处理下游离氨基酸含量最高,而保油10号在T2处理下综合营养品质最高。高钾含量油菜品种玉油7号不适合作为摘薹品种,中双8号提高施钾量有利于油菜菜薹产量和品质的提高,保油10号在抽薹期追施钾肥有利于菜薹产量的增加,一定范围内提高施钾量也有利于其营养品质的提高。 相似文献
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为研究“一菜两用”油菜新品种菜臺、油菜籽产量以及经济效益，于2020-2021年开展10个菜用油菜品种在采主薹和不采薹条件下的产量与效益比较试验。试验结果表明，采取合理的栽培技术，摘取主薹后19崇11-2每667 m2菜薹和油菜籽产量最高，分别为769.94、163.16 kg，其采薹后再生能力较强，可以确保既采收菜薹又收获籽粒，且油菜籽产量不减，每667 m2净收入增加1 125.33元，达到增产增收的目的，较适合“一菜两用”；狮山2017熟期较早，苗期短，为提早菜薹上市时间，可作为早熟品种推广。苗期天数与菜薹产量呈显著正相关，如选择苗期天数短的油菜品种，虽菜薹产量较低，但上市初期单价较高，可以获得更高的经济效益。 相似文献
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作者引进秋薹1号、秋薹2号、冬薹3号和夏秋美味4个菜薹新品种开展秋季栽培试验,通过比较其生育期、植物学性状、产量等指标,筛选适合在江苏昆山地区栽培的菜薹新品种。试验结果表明,各参试菜薹新品种的植株性状略有不同,但总体表现优良,符合当地消费习惯,均适合在昆山地区秋冬茬种植。秋薹1号、秋薹2号菜薹口感甜糯,抽薹较早,11月即可采摘上市,填补了市场空白,田头批发价4元/kg以上,且采收期长,种植效益较好;夏秋美味菜薹虽然采收期相对较短,但产量较高,可配合秋薹1号、秋薹2号种植;冬薹3号主薹粗壮,产量高,口感佳,但抽薹较晚,可于春节期间供应市场,田头批发价在14元/kg以上,经济效益显著。 相似文献
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为选育出优质、丰产、适应性强及抗性好的杂交菜薹新品种,利用自交不亲和系或雄性不育系为母本进行杂交新品种选育,育成了粤薹1号、粤薹2号2个杂交新品种,并以油绿802菜薹为对照,对2个新品种的产量、主要农艺性状、品质以及抗性进行比较和分析。结果表明:粤薹1号菜薹主薹质量最大,为423.4 g,春、秋两季667 m2产量分别是1 028.7、2 718.3 kg,均排名第1;粤薹2号菜薹次之;品质方面,粤薹2号最优,其次为粤薹1号。综合看来,粤薹1号、粤薹2号菜薹株型好、品质优、产量高,是适合出口和内销的优良品种,可以在广东省及周边地区广泛种植。 相似文献
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2013年,在重庆市垫江县开展了双低油菜品种对比及“一种双收”试验,结果初步表明,“一种双收”对油菜产量影响不大,增产增收效果显著。摘薹的8个处理除鼎油杂3号以外,其余7个品种均比对照油研10号收益高,其中先油188收益最高,折合每hm^2收益21378．0元。在具体操作中,“一种双收”应选用冬性较弱,抗病虫,生育期中熟偏早,苗薹期营养生长旺,易早发,摘薹后再生能力和恢复能力强,菜薹食用无苦涩味、营养价值高,油菜籽产量高的油薹兼用型“双低”优质油菜良种;增施薹肥,促分枝早生快发;适时适度摘薹,当菜薹抽出20～25cm高度摘薹10～15cm,基部留足10cm以上以便分枝,早抽薹的早摘,迟抽薹的迟摘,切忌大小薹一起摘而影响菜薹和油菜籽产量。 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