共查询到20条相似文献,搜索用时 281 毫秒
1.
2.
3.
自 2 0世纪 90年代初期上海农学院 (现上海交通大学农学院 )李向东试行欧亚种避雨栽培技术以来 ,南方地区发展欧亚种葡萄的势头很旺 ,掀起了一轮“提子”热。笔者19 87年开始栽植巨峰葡萄 ,1994年从郑州果树所引入 13个脱毒欧亚种葡萄进行栽植 ,19 99年开始进行大棚避雨栽培 ,最近 3年又走访了南方不少地方 ,切身感受到南方发展欧亚种葡萄还存在很多问题 ,现提出一些个人的思考 ,供大家商讨。1 存在的问题1 1 栽培者方面的问题1 1 1 舍不得投入 ,不搞避雨大棚栽培。在南方露地种植欧亚种风险很大 ,最主要是病害严重 ,造成减产甚至绝产。… 相似文献
4.
自上个世纪 90年代初期上海农学院(现上海交通大学农学院 )李向东试行欧亚种避雨栽培技术以来 ,南方地区发展欧亚种葡萄的势头很旺 ,掀起了一轮“提子”热。我们于 1 987年开始栽植巨峰葡萄 ,1 999年开始进行大棚避雨栽培 ,最近 3年又调查了南方不少地方 ,切身感受到南方发展欧亚种葡萄还存在很多问题 ,值得认真思考。1 存在的问题1 1 栽培方面舍不得投入 ,不搞避雨大棚栽培 在南方露地种植欧亚种风险很大 ,最主要是病害严重 ,造成减产甚至绝产。苏州蠡口有一户人家 ,1 998年春从东北引进了红提、黑提 ,投资 1 0万元建立了 2hm2 葡萄… 相似文献
5.
自 90年代初期上海农学院试行欧亚种葡萄避雨栽培技术以来 ,南方地区发展欧亚种葡萄的势头很旺 ,掀起了一轮“提子”热。笔者 1 994年从中国农科院郑州果树所引入 1 3个脱毒欧亚种葡葡进行栽植 ,1 999年开始进行大棚避雨栽培 ,最近 3年又调查了南方不少地区 ,深感南方发展欧亚种葡萄尚存诸多问题 ,现提出一些思考供商讨。1 存在问题1 1 栽培者方面的问题( 1 )舍不得投入 ,不搞避雨大棚栽培。在南方露地种植欧亚种风险很大 ,最主要是病害严重 ,造成减产甚至绝产。如 :苏州蠡口有人 1 998年春从东北引进红提、黑提 ,投资 1 0万元建立了2h… 相似文献
6.
7.
霜霉病是南方葡萄产区五大病害之一,特别是近几年来南方推广大棚促成栽培及避雨栽培,揭膜后是葡萄霜霉病害极易侵染之时,侵害葡萄轻则削弱树势,影响果实品质,重则提早落叶,影响花芽分化,直接造成来年产量降低。 相似文献
8.
一个适合南方栽培的葡萄品种──胜宝葡萄速生丰产,适应性广。但大多数品种在南方高温高湿的条件下栽培,表现病害严重,产量低,品质差。笔者1994年春从中国农科院果树研究所引进的葡萄品种胜宝(系日本板田良志从康拜尔葡萄枝变选育而成),经观察,表现抗病、早熟... 相似文献
9.
金星无核葡萄避雨栽培试验初报 总被引:1,自引:0,他引:1
我国南方 ,特别是像南京地区 ,葡萄花期及果实生长期常遇高温多湿的气候条件 ,导致露地欧亚种葡萄授粉受精不良、着果率低、病害严重、产量低和品质差 ,要成功栽培欧亚种葡萄 ,就得进行设施栽培。作为设施栽培的一种形式———避雨栽培 ,因设备简单 ,投资小 ,见效快 ,已经成为一种发展趋势。然而 ,全国关于避雨栽培的研究报告尚少 ,多数仅为生产经验的总结。本文以金星无核葡萄为试材 ,研究了避雨栽培对其果实品质的影响 ,并对叶片叶绿素及与感病有关的两种酶 (过氧化物酶POD和苯丙氨酸解氨酶PAL)进行了研究。1 材料与方法1 1 材料… 相似文献
10.
浙江省海盐县农业科学研究所1992年对巨峰葡萄进行大棚促早熟栽培实践,1998年开始无核白鸡心等欧亚种葡萄大棚促早熟栽培,2006年开始对各种品种(包括欧美杂种)进行大棚促早熟栽培;2009年开始部分大紫王、醉金香、藤稔葡萄采用双膜覆盖促早熟栽培,直至2012年.15年的大棚葡萄促早熟栽培试验主要研究4项技术,一是促早熟配套技术,二是大棚栽培条件下稳产栽培技术,三是大棚栽培条件下优质、精品栽培技术,四是大棚栽培防好雪害、冻害、热害和风害技术.本文主要针对促早熟配套技术进行总结. 相似文献
11.
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
12.
13.
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
14.
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
15.
16.
17.
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
18.
19.
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
20.
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