共查询到19条相似文献，搜索用时 421 毫秒
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本文从枝条选择、插穗制作、补充生根物质、洗脱抑制物质、湿沙贮藏、径切、团插、愈合组织移栽等多种途径全面探讨了杉木大树多年生枝条、１年生枝条、当年生枝条以及伐桩萌条的扦插繁殖技术，并且比较了用上述各种不同枝条作为繁殖材料的优点和缺点，特别对２５年生以上杉木大树侧枝的扦插技术作了较为详细的研究。 相似文献
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重瓣黄刺玫嫩枝扦插育苗试验结果表明：在７月中旬剪取１－２年生幼龄树当年生半木质化枝条中段作插穗，在全光间歇喷雾条件下，以至石为基质扦插生根率可达９８％。用植物生长剂，磁化水对嫩枝扦插生根率无显著影响而对生根量有显著影响。 相似文献
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邱进清 《中南林业科技大学学报(自然科学版)》1998,(2)
对杉木无性系扦插繁殖的生根及生长能力与扦插基质、原株年龄、采穗部位、穗条长度、扦插深度和时间等相关因素进行研究,结果表明,在不同杉木无性系之间,扦插生根及生长能力存在极显著差异．扦插基质、原株年龄、采穗部位和穗长、扦插深度和时间,对杉木扦插成活有显著或极显著的影响：①蛭石插床有利于插穗生根,但苗高生长以混合土为基质的插床为好;②无性系的生根能力、苗高和根径的生长量与原株年龄的关系表现为1年生＞3～5年生＞15～20年生;③根径处插穗的生根率、侧根生长量及苗高,分别比苗高1／3处的插穗大11．8％～18．6％,3．4％～9．8％和14．7％～25．7％;④穗长以10～12cm为宜,扦插深度为穗长1／2为好,扦插时间选择在12月份为佳． 相似文献
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醋栗扦插以皮部生根为主，扦插生根期２０天左右，生根部位集中在扦插入土深５－１５ｃｍ之间。３年生以下枝皮层老化，枝条芽为潜伏芽，扦插不易生根和成活。经不同方法扦插试验，醋样扦插适宜采条时间为１１月下旬，冬季采条沙藏比春季剪条提高扦插成活２８％，插穗的适宜长度为１５－２０ｃｍ，适宜粗度为０．７－１．２ｃｍ。同根枝条剪穗的适宜部位为下、中部枝段；插穗年龄以１－２年生扦插成活率为高，压条成苗率是压条数的１ 相似文献
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以3年生金雀花实生苗为试验材料,采用正交设计的方法,研究了激素种类(IAA,NAA和GGR)、质量浓度(1 000,1 500和2 000 mg/L)、处理时间(5,10,20 s)和插穗年龄(1,2,3年生)对其扦插生根的影响。结果表明:4因素对金雀花插穗生根质量均有显著影响,其中生根率1年生插穗极显著高于3年生插穗。因此,在实际生产中可通过修剪促进枝条萌芽,以增加1年生插穗的数量,多产出生根扦插苗;扦插生根的最佳处理为用1 500 mg/L IAA处理金雀花2年生插穗10 s,该处理的生根指标为生根率79.97%、根量13条/枝、根长71.68 mm。 相似文献
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重瓣黄刺玫嫩枝扦插育苗试验结果表明：在７月中旬剪取１～２年生幼龄树当年生半木质化枝条中段作插穗，在全光间歇喷雾条件下，以蛭石为基质，扦插生根率可达９８％，用植物生长调节剂、磁化水对嫩枝扦穗生根率无显著影响而对生根量却有显著影响。 相似文献
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插穗生根进程和粗细不同对落叶松扦插苗的影响 总被引：6，自引：0，他引：6
调查研究了日本落叶松１年生木质化枝春插生根进程和插穗直径粗细不同对扦插苗生根、生长的影响。在辽东气候条件下，萌发态木质化枝插后４９天开始生根，至２４天时生根率可达８６％以上。插穗直径≤２．５ｍｍ，生根率低。插穗直径增大，扦插苗生长和生根性状可得到明显改善，直径３．６￣５．０山的插穗生根率高达９４％以上。选用直径粗细适宜的插穗可大幅度提高日本落叶松硬枝扦插育苗效果，降低成本。 相似文献
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南方红豆杉扦插繁殖技术研究 总被引：6，自引：0，他引：6
2003~2004年应用2年生南方红豆杉幼苗进行扦插试验研究,结果表明:不同时间扦插的插穗生根时间最多相差2个月,2月中旬至3月中旬为最适宜扦插季节,扦插后3~5个月的生根率高于其它月份。用河沙与红泥作基质扦插,在不同季节扦插中以河沙作基质的生根效果比红泥的好。用生根剂处理有利于插穗提早生根及增加生根数量,以冬季及早春应用的效果较为明显,应用生根剂的插穗在扦插3~5个月后的生根率和生根数量与对照比有显著差异。不同类型插穗的扦插生根率在不同月份扦插的结果不同,但其差异不显著。 相似文献
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为给竹柏优良品系的扩繁提供技术支持,对不同措施处理下竹柏插穗的生根情况进行了试验。结果表明,不同季节扦插对竹柏插穗生根性状具有显著影响,春季是进行竹柏扦插的最佳季节,在春季进行扦插,竹柏的扦插生根率可达91.33%,平均生根条数为3.85条,平均最大根长为6.52cm;竹柏插穗选取的部位对竹柏生根性状有着极显著的影响,来自母树基部的插穗生根效果最好、中部次之,上部最差;不同留叶方式可极显著地影响竹柏扦插的生根率、生根数及最大根长,进行竹柏扦插,插穗应以保留2片全叶为最佳。 相似文献
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Single-node, leafy stem cuttings of Triplochiton scleroxylon K. Schum. were collected from successive nodes down the uppermost shoot of 2-shoot stockplants. The leaves were trimmed to 10, 50 and 100 cm(2) before the cuttings were set under intermittent mist to root. Batches of cuttings were harvested after 0, 14, 28 and 42 days to assess leaf water potential, dry weight and carbohydrate content of their leaf and stem portions. Cuttings with leaf areas of 10, 50 and 100 cm(2) increased in total dry weight by 29, 61 and 90%, respectively, during the 6-week period. The increase in dry weight was accompanied by increases in reflux-extracted soluble carbohydrates (RSC), water-soluble carbohydrates (WSC) and starch. By contrast, increase in leaf area reduced leaf water potential of cuttings before root emergence. Fewer large-leaved cuttings rooted than smaller-leaved cuttings, suggesting that rooting ability is at least partially determined by the balance between photosynthesis and transpiration. Fewer roots per cutting were produced on cuttings with 10 cm(2) leaves than on cuttings with larger leaves. Node position affected increments in dry weight, carbohydrate content and leaf water potential, with differences between nodes on day 0 generally being lost or slightly reversed by day 14. Rooting ability was not related to initial (day 0) carbohydrate content, suggesting that rooting is dependent on carbohydrates formed after severance. During the rooting period, the proportions of total non-structural carbohydrate as WSC and starch were reversed, from mostly WSC on day 0 to mostly starch by day 42. These changes in WSC and starch occurred most rapidly in large-leaved cuttings. 相似文献
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本文以广东梅州野生及人工种植的多年生鸡血藤Spatholobus suberectus为材料,以提高鸡血藤扦插育苗繁殖系数为目的,对影响鸡血藤扦插生根的主要因素开展扦插试验。结果表明:人工植株和野生植株的穗条扦插生根率无显著差异;扦插基质类型对生根率有显著影响,采用黄心土作为基质生根效果最好;1~3a生枝条中,鸡血藤的木质化枝条生根率要高于半木质化嫩枝,粗度>0.8cm的木质化枝条生根率最高;外源激素种类及其质量体积浓度均对扦插生根率产生显著影响,采用质量体积浓度为500mg·L^-1的GGR浸泡插穗基部1h扦插生根效果最好;不同季节扦插对比试验显示春季扦插的生根率要显著高于其他季节;扦插方式试验表明营养袋扦插生根率与插床扦插无显著差异。 相似文献
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Auxin stimulated rooting of epicotyl cuttings of Pinus sylvestris irrespective of the physiological stage of the plant from which the cuttings were taken. The epicotyl cuttings were divided into two groups, those that differentiated roots early (within 6 weeks after cutting) and those that differentiated roots late (more than 6 weeks after cutting). Auxin treatment significantly stimulated the frequency of early rooting of epicotyl cuttings, whereas it had no effect on the frequency of late rooting of epicotyl cuttings. The number of roots per rooted cutting was significantly higher after auxin treatment both on early and late rooted cuttings. Anatomical studies showed that most of the roots on both early and late rooted cuttings developed from wound tissue. However some types of rooting were found only after auxin treatment of early rooted cuttings, e.g., roots that developed from resin duct wound tissue or from vascular tissue or in the pith. 相似文献
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有性繁殖与无性繁殖相结合,建立轮回采穗圃,用全光自控喷雾扦插技术,大规模推广优良家系和第2代优良单株,是加快落叶松树种改良进程的关键。本文还提出了营建落叶松扦插苗人工林、测定林及采穗圃的方法和步骤。 相似文献
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垂丝海棠插穗的内源激素水平及其与扦插生根的关系 总被引：1，自引：0，他引：1
垂丝海棠扦插繁殖的试验结果表明,嫩枝扦插效果好于硬枝扦插,并且母树年龄是影响其扦插生根的重要因子。母树年龄为2年生时,生根率达77%以上。本文在此试验的基础上,对嫩枝和硬枝插穗中内源植物激素水平进行了测定。结果发现嫩枝插穗中IAA、CTKs的含量要高于硬枝插穗中IAA、CTKs的含量,并且随母树年龄的增加而降低;相反,嫩枝插穗中ABA含量要低于硬枝插穗中ABA的含量,并且随着母树年龄的增加而增加。实验结果表明:IAA、ABA的含量和扦插生根有密切关系。IAA促进生根,ABA抑制生根。IAA/ABA比值可以用来衡量垂丝海棠的生根能力。 相似文献
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《Scandinavian Journal of Forest Research》2012,27(1-4):71-81
Seven‐year old cuttings of pendula spruce were taller and had larger diameters than seedlings or cuttings of Norway spruce of normal crown type. Pendulous cuttings still had plagiotropic growth at age 7 years and the rate of change to orthotropic growth form was weaker than in cuttings with normal crown type. In pendulous cuttings the effect of the origin of ortet and clone on the crown symmetry was significant at age 5 years but not at age 7 years. The effect of clone on the growth form was evident at ages 5 and 7 years, but the effect of the origin of ortet was significant only in 7‐year‐old cuttings. There were no differences in plagiotrophy between clones from 4‐ and 7‐year‐old ortets. For pendulous cuttings the average height and diameter growth decreased in 5‐ and 6‐ year‐old cuttings with less pendulous crown form and with more plagiotropic growth form but this decrease had almost disappeared in 7‐year‐old cuttings. 相似文献