共查询到19条相似文献,搜索用时 64 毫秒
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兴安松引种栽培的研究 总被引:1,自引:0,他引:1
兴安松为偃松一变型,近年来才发现,数量甚少,为加强对这一种质资源的保护和利用,我们对其生物,生态学特性及繁殖技术进行了研究。结果表明:嫁接是繁殖兴安松有效的方法;红松和樟子松是最理想的砧木。由于嫁接成功,使兴安松在黑龙江省森林植物园得到了迁地保护。 相似文献
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吐根作为治疗痢疾的特效药而著名,主要具有祛痰、催吐和抗阿米巴痢疾的作用。我国目前对吐根药材的需求全部依赖于进口,国内未有大规模种植,为此,该文对原产巴西的吐根进行了引种繁殖及栽培研究。结果表明:(1)云南省西双版纳傣族自治州景洪市的气候条件能满足吐根的正常生长发育的需求,可作为吐根的引种地。(2)吐根的分根和茎下段可用于扦插繁殖,其发根率和存活率分别100.0%和100.0%、68.0%和75.0%,前者优于后者。(3)用20 mg·L-1的IAA或IBA浸泡1 h,吐根茎下段的扦插成活率为90.0%或88.0%,均显著高于对照,可用于提高吐根茎下段的扦插成活率。(4)采用分根繁殖的吐根植株在植株生长和药材外观性状较好,单株总根体积较高,吐根一年生植株平均株高为10.66 cm,两年生平均株高为16.54 cm,一年生植株根总体积为2.71 mL,两年生根总体积为3.54 mL。(5)吐根栽培基质可用腐殖土:椰糠体积比为4:1。(6)在吐根的年周期生长中,地径1—3月和9—11月增长明显,株高7—11月增长明显,叶片长和宽3—9月增长明显,根据这些特点,可科学制定相应的水肥管理措施。该研究结果可为吐根的引种繁殖和栽培提供一定的科学参考。 相似文献
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伞房决明的引种和栽培应用 总被引:2,自引:0,他引:2
伞房决明Cassiacorymbosa原产南美的阿根廷,在北美洲已广为驯化栽培。我国自二十世纪九十年代开始引种。我们也于1994年春开始了对伞房决明的引种,经多年的试验观察,引种在本地区获得初步的成功;现介绍如下:伞房决明为灌木,偶数羽状复叶,具柄,黄绿色小叶2—3对,小叶矩圆状披针形,长25-5cm,顶端稍尖,最下方的一对小叶之间有一腺体,花黄色,花瓣阔,长13cm,列成具长梗的腋生小形伞房花序,通常较叶为长,能育雄蕊7,荚果圆柱形,长5—8cm,种子棕色,有光泽。伞房决明在本地区的芽… 相似文献
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晚香玉 (Polianthestuberosa)是良好的观花及香料植物 ,花可提取珍贵的化妆品用的香精[5] ,出口量大 ,并且有逐年上升的趋势。Bankar等[5] 研究了晚香玉的营养特性 ;Yadav[6] 研究了球茎大小与栽植深度对生长和开花的影响。我国尚未见在特定的土壤上大面积栽培晚香玉的合理施肥与改土的报道。根据沙性无石灰潮土保水性差 ,干旱时土壤严重板结的特点 ,本试验应用具有保水、保肥、增大孔隙度的高吸水树脂[1~ 3 ] ,以不同的比例混于土壤 ,并施用不同比例的NPK肥 ,运用通用回归旋转设计 ,以确定适宜的高吸水树… 相似文献
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Huang CK Chang BS Wang KC Her SJ Chen TW Chen YA Cho CL Liao LJ Huang KL Chen WS Liu ZH 《Journal of plant physiology》2004,161(6):709-713
In the day-neutral plant Polianthes tuberosa (cv. Double) putrescine and spermine in corms at the early floral initiation stage decreased by 26 and 36%, respectively, compared with that in the vegetative stage. In contrast, a sharp increase in spermidine and cadaverine titers in corms was recorded at the early floral initiation stage. However, cadaverine in corms disappeared at the flower development stage. Polyamines in the roots were generally lower than those in the leaves and corms. In no case was the change in endogenous polyamine titers in the roots and leaves associated with floral initiation and flower development in P. tuberosa. Exogenous application of spermidine at 5, 25 or 150 microg per plant at the vegetative stage did not affect flower primordium counts. However, addition of a spermidine synthase inhibitor, cyclohexylamine, at 150 or 250 microg per plant (each dose was applied two times in total at an interval of 4 days) significantly reduced flower primordium counts, indicating that spermidine is involved in floral initiation and floral development in P. tuberosa. In P. tuberosa corms at the vegetative stage arginine decarboxylase activity rises and decreases at the early floral initiation stage. In contrast, ornithine decarboxylase activity reaches the highest level at the early floral initiation stage and declines significantly at the vegetative stage. Results indicate that an increase in spermidine and a transient increase in cadaverine titers in the corms seem characteristic of early floral initiation in P. tuberosa. It is also suggested that a significant reduction in putrescine and spermine in the corms is involved in the early floral initiation in P. tuberosa. 相似文献
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缠结龙脑香的引种栽培 总被引:4,自引:0,他引:4
肖来云 《植物资源与环境学报》1996,5(1):63-64
缠结龙脑香(DiterocarpusintricatusDyer)是龙脑香科的热带树种。其分布仅限于东南亚的老挝、缅甸、泰国和越南。常与钝叶婆罗双(Shoreaobtusa)、小瘤龙脑香(D.tuberculatus)、海滨油楠(Sindoramaritima)和大果紫檀(Pterocarpusmacrocarpa)等组成干性落叶龙脑香林。也见于泰国东北部低地龙脑香林(NainKhai),生长于排水较好的盐土和酸土。或呈斑点状分布于平地和低纬度具一定坡度的石灰山[1]。在种源地泰国曼谷,地处北纬13-45’,东经100°30’,海拔8m,年平均温28.1℃,极端最高温41.1℃,极端最低温11.1℃,年平… 相似文献
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Polianthes tuberosa is a commercially valuable flower crop in the Mekong Delta of Vietnam that is propagated by the harvesting and planting of bulbs. The cultivation of P. tuberosa is complicated by an endemic nematode infection that damages a high proportion of the plants. Based on morphological criteria and ribosomal RNA gene sequencing, we have determined that the infection is caused by an Aphelenchoides sp. nematode and is most likely Aphelenchoides besseyi. By scoring various parts of harvested plants with flowers for the presence of viable nematodes over a period of six months, we determined that the nematode is an ectoparasite that can survive the intercrop periods, especially in the bulbs that are used to plant new crops. A comparison of farming practices in the Mekong Delta failed to identify useful control methods, but rather indicated that fields that have cultivated P. tuberosa for the longest periods suffer the worst damage from the nematode infection. Finally, we demonstrated that the nematode is capable of infecting 30 rice cultivars but does not cause the white tip disease usually associated with A. besseyi infection. 相似文献