共查询到20条相似文献，搜索用时 46 毫秒
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油桐采取嫁接繁殖可以保持母本的优良性状,提早结实.利用嫁接的方法对优树进行当代鉴定,可以大大缩短良种的选育期,加快良种繁殖.多年来在嫁接方法上多采用劈接和芽接法,要求季节性强,嫁接时期短,劈接要在砧木萌动前不离皮时进行,芽接要求砧木到离皮时,接穗须待新梢上的芽成熟后才可进行.采用插皮接可在生长季进行,方法比劈接易掌握,且不劈伤木质部.嵌芽接系带木质部芽接,砧木离不离皮均可嫁接,接穗1年生枝条和当年生新梢均可利用.这两种方法嫁接成活率高、嫁接期长、接后当年成苗,1—2年生油桐在林地嫁接当年形成树冠,大树高接第2年结果(见图l).现将插皮接和嵌芽接进行油桐嫁接试验的初步结果简报如下: 相似文献
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桃李带木质部嵌芽接 总被引：1，自引：0，他引：1
李树、桃等枝条皮层较薄,一般方法芽接时,接芽不易剥离,尽而影响嫁接成活率;为解决这一问题,我们在生产中采用了丁字形芽接和带木质部嵌芽接两种方法进行对比,砧木毛桃,接穗李子品种为大石早生、安哥里拉、李王、莫尔特尼等;桃品种为中华寿桃、早凤王、大王等,发现带木质部嵌芽接效果好,成活率达95%以上,现简要介绍如下:1 嫁接方法(1)削取芽片。先在接穗芽的上方0.8～1.0cm处向下斜削1刀,长约1.5cm,然后在芽的下方0.5～0.8cm处呈45度角向下斜切至第1刀口底部,使芽片长约1.5～2.0cm,暂不取下待用。(2)切砧木。在砧木基部10cm左右处选一光滑… 相似文献
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提高核桃芽接成活率的主要措施 总被引：1，自引：0，他引：1
核桃芽接是培育优质苗木,促进生产发展,实现良种品种化的基本手段之一,生产上常采用方块形芽接法,此方法嫁接成活率较高,而且嫁接后接穗发育良好,但是接前准备和接后管理工作不当,不但会使嫁接成活率降低,而且还会影响接穗正常生长。因此在田间实际操作中除了掌握正确的芽接技术外还应注意以下几个方面。 相似文献
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玉兰属植物高接效果调查 总被引：1，自引：0，他引：1
木兰科玉兰属 ( Magmolia )植物花大色正 ,或洁白如玉或紫霞斑斓或馨香扑面 ,是著名的园林观赏树种。我园从事玉兰属植物引种栽培多年 ,现已拥有 30多个种 (变种、品种 ) ,玉兰的嫁接通常采用 1～ 2年生实生苗作砧木进行。 2 0 0 0年我们采用了 4～ 6年生大苗作砧木进行高接 ,取得了显著效果 ,现将结果总结如下。1 嫁接技术嫁接采用嵌芽接 (带木质芽接 ) ,时间为8月上旬至 9月上旬 ,砧木为 4～ 6年生白玉兰实生苗或望春玉兰。粗 2～ 4cm,嫁接高度0 .4～ 1.2 m,随采随接 ,次年春 3月下旬至 4月初解绑、剪砧。2 高接效果调查2 .1 嫁接成活… 相似文献
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2004-2006年,对山杏、山樱桃进行种源试验,结果表明:山杏敖汉旗等4个种源苗期生长量存在极显著差异,敖汉旗和巴林右旗种源高生长、速生性、苗木形态及整齐度等明显优于万家沟和乌拉山种源。造林初期山杏树高、地径、冠幅等性状差异明显,广义遗传力较大,种源间遗传变异丰富。种源排序为敖汉旗>巴林右旗>乌拉山>万家沟。初步选择敖汉旗为优良种源。山樱桃西苏旗种源苗期高生长、地径生长等明显超过其他3个种源,造林试验表现优秀。固阳种源次之,该种源生物量较高。万家沟和凉城种源生长量、适应性和抗性等都表现较差。西苏旗种源为优良种源。 相似文献
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珍珠梅属植物具有耐寒、耐阴、适应性好的特性,是我国北方地区的重要观花灌木,同时也具有重要的药用价值。本文综述了近年来珍珠梅属植物在园林绿化、育种技术、化学成分分离提取与分析、药理作用等方面的研究进展,指出珍珠梅属植物在品种培育、药用成分研究等方面存在的问题,并提出了该属植物种质资源开发利用的方向。 相似文献
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Prunus ferganensis (Kost. & Riab) Kov. & Kost, a close relative of cultivated peach (Prunus persica (L.) Batsch.), is native to arid regions of central Asia. A distinguishing feature of P. ferganensis is its prominent, elongated, unbranched pattern of leaf venation. To determine whether the long-vein trait could be used as a marker in breeding for drought tolerance, we investigated the association between this trait and the leaf morphological and physiological parameters related to drought response in P. ferganensis, P. persica and two interspecific hybrids, one with the long-vein trait (BY94P7585) and one without (BY94P7589). The four genotypes were grafted onto "Guardian" peach rootstock and half of the plants were assigned to a drought treatment in which irrigation was limited to 25-50% of the evapotranspiration (ET) rate measured in the remaining well-watered plants, which were irrigated to runoff daily. The drought treatment reduced photosynthesis and leaf conductance by 49-83% and reduced total leaf area per plant by 17-24%, but generally did not affect mid-morning leaf water potential. Leaf gas exchange did not differ among genotypes in either treatment. Sorbitol accumulated in mature leaves in response to drought, but neither its amount nor its metabolism varied systematically with climatic adaptation among genotypes. Accumulation of transport sugars was highest in P. ferganensis, indicating that growth reduction may represent an important strategy for coping with drought in this species. Prunus ferganensis and the hybrids had higher ET than P. persica, and seemed to use water opportunistically, maintaining high gas exchange rates and consequently high ET when water was available, and avoiding low water potentials through stomatal closure as soil water declined. Leaf size (cm(2) leaf(-1)) and specific leaf area (cm(2) g(-1) dry mass) were lower in P. ferganensis and the hybrids than in P. persica. We conclude that the long-vein trait is not a reliable marker for drought tolerance, but leaf traits of P. ferganensis such as size and specific leaf area may be useful in P. persica breeding programs targeting drought tolerance. 相似文献