共查询到19条相似文献，搜索用时 218 毫秒
1.
杉木无性系扦插苗生长规律研究 总被引：1，自引：0，他引：1
本文对杉木无性系扦插苗的生长进行了观测研究,结果表明,杉木无性系插穗属混合生根型;不同无性系插穗形成愈合组织的多少、生根快慢、成活率、生长量均存在着显著差异;苗高生长量只出现一个峰值(8～9月间),下半年生长量占全年总生长量85%以上。应用计算机对观测数据资料进行逐步回归,筛选出影响各无性系扦插苗高生长量的主导因子是,速生期天数和根长。对扦插苗的抚育管理、苗期选择进行了讨论。 相似文献
2.
华北落叶松扦插育苗年龄效应和家系效应研究 总被引：3，自引：0，他引：3
华北落叶松扦插育苗中存在十分明显的年龄效应，采穗母株的年龄不仅影响插穗的扦插生根，而且影响扦插苗移栽时的生长，３．５ａ生、５．５ａ生母株混合扦插苗移栽后，当年苗高生长停止比１．５ａ生母株扦插苗早１８ｄ，苗高低５．４ｃｍ。家系效应也存在于华北落叶松扦插育苗中，家系间、家系内单株间生根率差异明显，控制授粉家系和优株的生根率变幅和变异系数较自由授粉家系和优株大，优株较家系大，华北落叶松无性育种应采取家系选择和单株选择并行的原则。 相似文献
3.
中国沙棘嫩枝扦插容器育苗技术研究 总被引：2，自引：1，他引：1
1993年～1996年的试验结果表明:在塑料温棚条件下,用70％的森林土 20％生黄土 10％细河砂作营养基质;在6月上中旬采剪1a～3a生中国沙棘幼树当年新生半木质化嫩枝作插穗,进行容器扦插育苗,生根成活率可达95％～100％,插后80d～100d,平均苗高可达40cm～60cm,基径粗0.3cm～0.5cm,当年9月中下旬即可出圃栽造。茎枝生长已基本停止,侧芽已生成时为最佳采穗扦插时期。插穗的低浓度外源生根剂处理,均对提早生根与促进根系发育有一定作用,但对提高扦插成活率并无实质意义,关键在于内源生长素的作用。 相似文献
4.
祁连圆柏扦插繁殖技术研究 总被引：2，自引：0，他引：2
祁连圆柏是青海省的主要造林树种之一,本文以5 a生祁连圆柏母树当年生半木质化枝条为材料,在青海省西宁市开展了扦插环境、日期、扦插基质、插穗长度、采条部位、下切口形状等因素对祁连圆柏扦插生根与生长的影响试验,结果表明：扦插环境与日期、扦插基质、插条长度、枝条着生部位、下切口形状等对祁连圆柏插穗的生根率、生根条数和新稍生长量影响的差异极显著。生产中,应采集5 a生母树树冠中、上部枝条,剪成下切口为马蹄形、长10～15 cm的插穗,用100 mg/L的GGR溶液处理2 h后,于6月中旬～7月中旬扦插于珍珠岩＋腐殖质土（1：2）的基质中,并搭设小拱棚,扦插生根率可以达到79%以上。 相似文献
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通过对榕树（Ficus microcorpa）不同插穗年龄与生根关系的研究,结果表明不同年龄插穗对生根率和苗高具有显著的影响。成活率以3年生插穗最高,达到98％,2年生为89％;对不同扦插时间与插穗生根生长情况关系的研究,结果表明不同的扦插时间,其插穗的成活率有显著的差异,而苗高则差异不显著。其中,2、3月成活率较高,均达到90％以上。 相似文献
8.
为降低生产成本,加快繁殖速度,选取柳桉组培苗采穗母株上的半木质化枝条为试材,开展了嫩枝扦插试验。结果表明：生长激素IBA的浓度、扦插基质和组培苗插穗母株的年龄是影响柳桉嫩枝扦插育苗生根的重要因素,但IBA的处理时间以及IBA浓度与处理时间的交互作用对生根无显著影响;从1—2年生的组培苗采穗母株上选取穗条,以黄心土：糠壳灰（V：V=3：1）为扦插基质,插穗用IBA100mg／L浸泡处理0．5h是柳桉嫩枝扦插的最佳处理组合,其生根率达90％以上,平均每株生根数达5条以上。 相似文献
9.
现将桉树扦插育苗的十大关键环节简介于下。
1．采穗母株。用组培苗作母株，插穗生根状况好。
2．母株年龄。母株年龄在1-3a生时，采穗扦插生根率高。 相似文献
10.
利用全光雾插技术对长白落叶松半木质化插穗扦插育苗研究表明：夏插３０ｄ后开始生根，从扦插至大部分插穗生根（７２．７％）需要７２ｄ时间。２．５ａ生插穗未经激素处理生根率达７０．８％，利用２００ｇ／ＬＩＢＡ溶液浸泡２０ｍｉｎ后，插穗生根率提高到８０％；不同采穗母株间插穗生根率变异幅度为３２％～９５．３％，差异达到极显著水平；不同年龄插穗经２００ｇ／ＬＩＢＡ溶液处理后生根率随母株年龄的增大而降低。 相似文献
11.
The main objective of our clonal propagation program is the production of high quality timber and faster tree growth. Teak
(Tectona grandis Linn. f.) is an important plantation species in the tropics but the demand of teak timber is increasing globally. Teak planting
stock is still produced from seeds of unselected elite genotypes which may lead to poor stand establishment. The number of
seeds per fruit and their germination ability are also variable and limited by several factors. Therefore an alternative method
i.e., clonal propagation is required for mass multiplication of elite trees. It is an established fact that the clonal propagation
or adventitious root formation in cuttings is markedly affected by several external and internal factors. Considering these,
an experiment was conducted on leafy soft wood shoot cuttings of 3-year-old hedged teak stock plants grown in a hedge garden
to study the effects of branch position and auxin treatment on adventitious root formation. A factorial completely randomized
design was used for experimentation. Coppice shoots were collected from basal, middle and upper positions of the hedge garden;
and mono-nodal leafy cuttings were prepared. These cuttings were treated with different concentrations of IBA and NAA; and
were cultured in a mist chamber for rooting where the relative humidity was maintained at 85 ± 2% with maximum and minimum
day-night temperature at 32 ± 1°C and 26 ± 1°C respectively. After 45 days the cuttings were removed from the rooting medium
and observations were made. It was observed that the rooting parameters viz., percent rooting and percent sprouting, mean
number of leaves, mean number of shoots and length, and mean number of roots and length per cutting were significantly influenced
by the branch position and auxin treatment. Treatment with 4000 ppm IBA increased percent rooting and percent sprouting whereas
NAA suppressed it. Treatment with 4000 ppm IBA also increased the mean number of leaves and shoots, and the length, and the
mean number of roots per cutting. The highest mean number of roots and length were observed in cuttings taken from the branch
emerging at the upper position followed by branches of middle and lower position. Cuttings of branches at a middle position
showed the highest values of percent rooting, percent sprouting, mean number of leaves and shoots and mean shoot length per
cutting. Furthermore, the interactive effect of branch position and auxin treatment on rooting and sprouting response was
also found to be significant. Overall, the findings of this investigation suggest that middle branch position in hedge plants
and 4000 ppm IBA can be made to induce maximum rooting and to produce high quality planting stock material for clonal forestry
program of teak. 相似文献
12.
在无激素处理的条件下，１．５年生幼龄母株的插穗易于生根，平均生根率达９６．０％以上，且发根最大，偏根率低；４．５年生时，插穗生根率极显著低于１．５年生母株，而与８．５年生母株无显著差异；１２．５年生母株插穗生根率又极显著低于８．５年生母株。母株年龄与插穗生根率和偏根率分别呈显著的负相关（ｒ＝－０．９６５２）和极显著正相关（ｒ＝０．９９９３），但与生根量和平均最长根长度无显著相关。插穗基部切削方式不 相似文献
13.
Effects of stock plant nutrition on growth and subsequent rooting of leafy stem cuttings of the commercially important west African tree Triplochiton scleroxylon K. Schum. were investigated to identify the primary morphological variables influencing adventitious root formation. Potted plants were watered as required with one of four balanced nutrient solutions (0, 15, 63 or 125 mg N l(-1)). Increasing the nutrient supply to stock plants increased growth rate and rate of adventitious root production of subsequently harvested cuttings, but an optimum nutrient regime was not identified. Rooting percentage increased from 27% in cuttings harvested from stock plants receiving a low nutrient supply to 64% for cuttings harvested from stock plants receiving eight times the amount of nutrients extractable from plants under typical field conditions in West Africa. The ability of a cutting to retain its leaf during propagation and the length of the cutting were the primary measured characteristics associated with rooting and accounted for 43% of the variance fitted in the model. The length of the new shoot, total leaf area and within-shoot position (node position) were also significantly associated with rooting. After these characteristics were fitted to the model, the genetic origin (clone) was not statistically significant. We conclude that genetic variation in rooting potential is mediated through variations in morphological and physiological traits, rather than through genetic variation in cell differentiation or related aspects of root initiation. 相似文献
14.
落叶松扦插繁殖配套技术的研究 总被引：1，自引：0，他引：1
从3个主要途径收集了落叶松优良品系,建立了采穗圃,营造了对比试验林。对优良品系无性苗扦插技术进行了较全面研究,结果表明:(1)在扦插基质选择上,以河沙为好;(2)插穗地径与生根有较大关系,采穗时应尽量剪取地径大于1.8 mm的插穗;(3)母树年龄越小,插穗生根效果越好,据此,采穗圃以经营5 a为宜;(4)不同品系落叶松的扦插生根能力不同;(5)不同配比、不同浓度的激素至关重要,采用IBA50%+IAA20%+NAA30%的质量分数为5.0×10-5 浓度溶液和IBA60%+IAA20%+NAA20%的质量分数为1.5×10-4 浓度溶液,辅以适量烟酸及链霉素等增效剂处理落叶松插穗,其生根可稳定在80%以上。 相似文献
15.
闽楠扦插繁殖技术研究 总被引：1，自引：1，他引：1
通过正交试验设计研究不同年龄母株穗条、扦插基质、生根促进剂浓度、扦插时间对闽楠生根率及根生长的影响。结果表明:扦插基质、母株年龄、扦插时间对闽楠生根率及根生长影响显著,不同生根促进剂浓度对生根率及根生长无显著影响;各因素的最佳组合为:1年生母株穗条经ABT1#800 mg.L-1速沾后扦插于砻糠灰中;3月份扦插生根率最高,达89.6%。 相似文献
16.
祁连山青海云杉扦插繁殖技术及其生根机理研究 总被引：1，自引：0，他引：1
研究不同母株年龄（7、10、15、20和25年）、扦插类型（嫩枝、硬枝和根系）及穗条采集部位（顶端、上部、中部和下部）对青海云杉插穗扦插生根的影响,扦插前测定插穗内源激素（IAA,ABA和KT）和营养物质含量的变化,揭示其与扦插生根率的关系,结果表明：15年生青海云杉上部的嫩枝（粗度：0.5～1.0cm;长度：15cm）能有效地提高扦插生根率和降低基部腐烂率,同时增加插穗生根数和根系长度,表现出较好的扦插生根特性,内源生长素（IAA,ABA和KT）和有机营养物质（碳和氮）与青海云杉扦插生根之间存在显著相关关系。单一的某种激素、有机化合物对插穗生根没有明显的影响,青海云杉扦插生根以及生根能力的大小主要受IAA/ABA和全碳/全氮比值的调控,比值越大,其插穗生根率越高。可用IAA/ABA和全碳/全氮比值作为衡量青海云杉插穗生根能力的指标。 相似文献
17.
A study to determine the best vegetative propagation protocol was carried out for Dalbergia melanoxylon. Natural regeneration of D. melanoxylon is limited due to poor seed viability and germination. The effects of age of donor plant, indole-3-butyric acid (IBA) treatment
and cutting position on rooting of stem cuttings were investigated. The effect of age of donor plant was significant (P < 0.001) only for percent rooting, position effect was significant for all studied parameters, and IBA treatment at 300 ppm
was insignificant only for percent callusing. Interactive effects of cutting position × age of donor and cutting position × IBA
treatment were significant for percent rooting and root number per cuttings while interactive effect of age × IBA was significant
only for percent rooting. Observed difference in rooting performance could be due to uneven distribution of root promoting
and inhibiting substances with respect to age of donor plant and IBA which intensified root formation. Cuttings from juvenile
donor plant performed better in all rooting parameters than mature donor plant. The highest percentages in rooting were (71.11%)
and (24.42%) for cuttings from juvenile and mature donor plants, respectively. IBA treated cuttings produced higher percentage
rooting, number of roots and root length than untreated cuttings which revealed a strong IBA influence on rooting ability
of stem cuttings in D. melanoxylon. It was concluded that stem cuttings should be taken from juvenile donor plants and basal cutting position should be used
to produce high quality planting stock material for the afforestation and conservation programme of D. melanoxylon. 相似文献
18.
A.T.M. Abdullah M.A. Hossain M.K. Bhuiyan 《林业研究》2006,17(4):301-304
Introduction Guava (Psidium guajava Linn.), belonging to the Family Myrtaceae, is originated in the tropical South America (Hayes 1970; Pathak and Ojha 1993) and grows wild in Bangladesh, India, Thailand, Brazil, Florida, West Indies, California and also … 相似文献
19.
以绿色植物生长调节剂GGR6号40、80 mg·kg-12种浓度的溶液处理甘蒙柽柳插穗基部后进行扦插育苗试验,结果表明,用GGR6号处理甘蒙柽柳插穗,能显著提高插穗的生根率、成活率,促进根系和苗木的生长;2种浓度处理的插穗地径生长量分别比对照提高32%和30%,树高生长分别提高13.45和10.15 cm;不同处理对根鲜质量影响差异极显著,对侧根数影响差异显著,对侧根均长影响不显著。 相似文献