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1.
马尾松扦插苗生长规律的初步研究 总被引：2，自引：0，他引：2
对马尾松无性系及家系扦插苗的观测研究结果表明：水培根系生长良好,侧根多且壮,须根发达;春扦１年生无性系扦插苗的主梢生长量只出现一个峰期（３￣４月）,下半年生长速率占全年生长速率的８５．９％,不同无性扦插苗生长速率的快慢有差异;高产脂家春插成活率比秋插高,在３０￣９５％之间,苗高和地径生长为２１．１ｃｍ和０．４ｃｍ,分别是秋播地的２．１１倍和１．２９倍。 相似文献
2.
马尾松全光扦插育苗试验 总被引：4，自引：1，他引：3
自１９９６年以来,利用现有山场的马尾松幼林作为穗条来源,采取人工间歇喷雾管理法进行马尾松全光扦插育苗。结果表明：经生长调节剂处理的穗条平均成苗率是清水处理的１．５～２．１倍;半木质化穗条的成苗效果好于尚未木质化的;３～５年生幼林可做为穗条来源。对２２个高产脂家系和６个速生无性系单株的扦插育苗,成苗率分别为３７．８％～７７．５％和５．９％～９２．７％,从中选出１４个高产脂家系和３个速生无性系单株的扦插苗上山造林,提高扦插成苗的遗传增益。 相似文献
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4.
采用塑膜棚培育水杉实生苗，出苗率提高到１．１％，成苗率从几乎是零提高到１．１％，平均苗高７３ｃｍ，地径１．２ｃｍ，效果明显。 相似文献
5.
对湘林系列5、14、15、18、40、166等6个油茶优良无性系的芽苗砧嫁接苗生长情况进行了调查。调查结果为：6个无性系平均成活率和抽梢率的变化范围分别为74．6％-96．2％和71．3％-93．6％，平均苗高和地径的变化范围分别为13．5-19．8cm和0．303-0．356cm，平均叶片数和冠幅值变化范围分别为8．7-12．7片／株和7．3-8．6cm，平均根长和根幅变化范围分别为6．0-6．8cm和4．7-6．5cm。6个无性系平均成活率和抽梢率分别为85．O％和88．5％，分别大于对照5．0％和2．1％；平均苗高和地径分别为15．8cm和0．33cm，分别大于对照1．4cm和0．022cm；平均叶片数为10片／株，大于对照0．8片／株；平均冠幅、根长和根幅分别为8．0cm、6．5cm和5．4cm，分别大于对照0．43cm、0．25cm和0．78cm。湘林166和湘林5的芽苗砧嫁接苗生长表现较好，其平均成活率、抽梢率及苗高、地径、叶片数量、冠幅与根长等均较大；湘林15和湘林40则生长表现较差，其平均成活率、苗高、叶片数量等均略低于混合优良无性系（对照）苗。 相似文献
6.
引种美洲黑杨无性系的苗期遗传测定与选择 总被引：2，自引：0，他引：2
９７个美洲黑杨无性系经苗期测定结果表明：苗高、地径的生长，表现出无性系间的显著差异，具有较丰富的遗传变异基础，广义遗传力分别为８０．２３％和７２．９９％，二性状间表现出极显著的遗传相关。以苗高的ＬＳＤ多重比较，选择出生长最好的４１个无性系，其苗期生长水平超过或相当于中林２３杨；用苗高和地径的综合指数选择，淘汰生长最差的２９个无性系，保留的６８个无性系作为育种资源保存。 相似文献
7.
马尾松扦插造林配套技术试验结果表明：选择优良家系建立采穗圃，采取去梢促萌措施，能使采穗母树平均产穗条２０８条／株；地膜覆盖可使扦插苗生根率提高到８９．７６％，比无地膜覆盖提高１３．４７％；采用切根扦插苗造林，其成活率可达９５．３３％；扦插苗造林比实生苗造林的幼林树高增加２９．６２％，地径增加２８．５７％；通过无性系选优的幼林，１．５年生平均树高达１．３３ｍ。 相似文献
8.
国家二级重点保护植物红桧经４年试验观察，当年实生苗平均高生长为８．５ｃｍ，平均地径为０．１５ｃｍ，最高单株为１７ｃｍ，地径为０．２ｃｍ。扦插繁殖苗，春插成活率比夏插高，最高可达１００％，当年移栽春插苗平均高生长达２０ｃｍ，平均地径达０．２ｃｍ，最高达２５ｃｍ，最粗地径达０．２３ｃｍ，夏插苗用生根剂ＧＤ和ＮＡＡ，前者生根率和生根数均比后者高。 相似文献
9.
刺槐无性系营养钵插根育苗试验研究 总被引：3，自引：0，他引：3
对刺槐无性系进行了营养钵插根育苗试验,结果表明：（１）粗根段（０．５～０．８ｃｍ）平均扦插成活率７８％,平均苗高２．３６ｍ,平均地径２．２６ｃｍ,分别比细根段（０．４ｃｍ以下）,提高２７．９％,２８．３％,２４．９％,（２）长根段（８～１２ｃｍ）平均扦插成活率为８３．３％,平均高２．４８ｍ平均地径２．２８ｃｍ,分别比短根段（４～５ｃｍ）提高２７．８％,１５．１％,９．７％。 相似文献
10.
黑杨派杨树新无性系苗期试验研究 总被引：2，自引：1，他引：1
《山东林业科技》1999,(2)
１个黑杨派杨树新无性系的苗期试验结果表明：无性系间的生长量和育苗成活率存在显著差异,具有广泛的遗传变异。苗高、地径、胸径、成活率４个性状均受强遗传控制。３个生长性状间表现出极显著的遗传相关。通过聚类分析和综合评定,选出３１个生长量较大、育苗成活率较高的无性系,可参与区域化造林试验。 相似文献
11.
We examined effects of mist quantity, topophysis (origin of cutting in the crown of 6-year-old trees), maturation state of the donor stock, and time of sticking on rooting and root system quality of cuttings representing five full-sib hybrid larch families obtained with Larix decidua Mill., L. laricina (du Roi) K. Koch, and L. kaempferi (Lamb.) Sarg. (Sieb. and Zucc.) Gord., as parents. Mist frequency, supplemental watering and family all had highly significant effects on percentage of cuttings rooting and root system quality. The high-frequency misting regime yielded both higher rooting percentages and higher quality root systems than the low-frequency regime without supplemental watering. Supplemental watering of the rooting medium in the low-frequency misting regime increased both percent rooting and root system quality to values comparable with those obtained by cuttings in the high-frequency misting regime. Rooting of cuttings from the top, middle and bottom whorls of 5-year-old plantation grown trees tended to decline with increasing height for three of the five families. Overall, height of cutting origin did not significantly affect rooting, but when analyzed separately, two families exhibited a significant decline in rooting toward the top of the trees. Age of donor ortet (ranging from 1 to 7 years) significantly affected both percent rooting and root system quality. Rooting percentages declined linearly with age, and root system quality declined more sharply than percent rooting. The relatively poor root system quality of cuttings from ortets older than 1 year was closely associated with plagiotropic growth. Softwood cuttings (stuck in mid-July) rooted better than hardwood cuttings (stuck in early September) across all families. 相似文献
12.
Cuttage and air layering were evaluated as means of vegetative propagation of the tropical woody tree, Inga feuillei. Effects of moisture management systems, leafiness, auxin application, and stem diameter on rooting of semihardwood cuttings were investigated. Cuttings were taken from 2-year-old seed-propagated, greenhouse-grown stock plants. Compound leaves were either reduced in area or removed entirely before auxin pretreatment with 0, 0.3, or 0.8% indolebutyric acid (IBA) followed by sticking under mist or in a polyethylene enclosure. Leafless cuttings did not root regardless of moisture management system or auxin pretreatment, whereas 55% rooting of leafy cuttings was observed. Leafy cuttings rooted significantly better under mist than in a polyethylene enclosure. Auxin treatment at the higher level increased rooting percentage approximately two fold for larger diameter cuttings (8.1 to 20 mm), but had no effect on the smaller cuttings (2 to 8 mm), and resulted in an approximately three fold increase in the number of roots/rooted cutting for both stem diameter classes. Auxin treatment did not affect rooting percentage of leafy softwood cuttings under fog, however it did increase the number of roots per rooted cutting. One hundred percent of air layered shoots rooted within 5 weeks with or without auxin pretreatment, and all rooted layers survived transplanting to soil. Possible implications of this research on agroforestry, selection, genetic improvement, and conservation are discussed. 相似文献
13.
大规模生产杉木改良苗木的方法 总被引：3，自引：1，他引：3
1986年李明鹤把林木改良区分为个体改良与群体改良,并在此基础上提出了采用无性系选择法,分两步迅速实现杉木良种化的方案。从1986年起,经三年的实验,现已完成了第一步,并研究出了建立采穗圃的新技术,它有助于使我国杉木造林迅速实现良种化。现将研究的结果报道如下。 相似文献
14.
Shoot cuttings were harvested fromfour-year-old, loblolly pine hedges in March andSeptember of 1987, and placed into a series offactorial combinations of cutting length, diameterclass, and the presence/absence of a terminal bud toassess effects on rooting and field performance.Average rooting in the March trial was 50 percent andonly 20 percent for the September trial; however, thebest treatment in March yielded 100 percent rooting.Terminal bud status did not appear to influencepercent rooting. Shorter cuttings (5.1 or 7.6 cm)with an average diameter of 2 or 3 mm tended to rootbetter and develop more roots. Field performance ofthe rooted cuttings through age five suggests that theoriginal cutting does not require a terminal bud, butthe best set of morphological traits differ dependingon bud status. Considering both rooting ability andfield growth with an original tip bud present, thebest cutting dimensions were 5.1 or 7.6 cm long and 2or 3 mm in diameter. Without a tip bud present,cutting dimensions were restricted to 7.6 or 10.2 cmlong and 3 mm in diameter. Number of main roots wasa weak predictor of tree height or dbh at age five. 相似文献
15.
A comparison of pre-planting treatments on hardwood cuttings of four hybrid poplar clones 总被引：1，自引：1，他引：1
Rooting and early growth of four hybrid poplar clones (Populus spp.) planted in a greenhouse were examined after applying 40 pre-rooting treatment combinations to dormant cuttings. Treatments included 2 cutting lengths (5 and 10 cm), 5 soaking times (0, 2, 4, 8, and 12 days), and 4 dips (chitosan, rooting hormone powder, liquid rooting hormone added to the soaking water, and none). Significant differences in both rooting percentages and growth were shown between clones after 7 weeks of growth. Ten cm cuttings had 29% greater rooting success, 28% more above-ground growth, and 12% lower root/shoot ratios than 5 cm cuttings. Cuttings planted without soaking had the lowest rooting success, at less than 45% on average. Commercial rooting hormones decreased the number of rooted cuttings but increased root/shoot ratios. For optimal rooting, we recommend using 10 cm cuttings, soaked for 2 days in water (4 days for the Jackii10 clone) without any additional dipping/hormone substance. 相似文献
16.
Tests were conducted to assess rootability of red alder softwood cuttings from shoots of young trees and epicormic sprouts of mature individuals. Ortets were 3 to 34 years old, and treatments with and without indole-3-butyric acid (IBA) were compared. The extent of rooting and root vigor on the cuttings varied greatly among ortets and treatments. Among nonterminal cuttings, the best overall rooting success, with and without IBA, was obtained with cuttings of the youngest ortet. Average rooting of terminal and nonterminal cuttings of one clone were 100% and 64%, respectively. Although cuttings of some trees rooted well without IBA, the IBA treatment appeared to be generally beneficial. For all nonterminal cuttings of all clones, best results (80.0%/x) were obtained with a 10-sec dip in 2,000 or 4,000 ppm IBA. Vigorous planting stock was obtained from the rooted cuttings of all clones. Using epicormic sprouts from mature trees of proven performance will presumably allow propagation of superior trees and establishment of new plantations with improved stock. 相似文献
17.
1999年冬 ,在广东台山红岭种子园内进行湿×加杂种松嫩枝扦插繁殖试验。采用 5个插前穗条浸渍处理、2个荫棚环境 (各设 3个重复 )进行扦插试验。结果表明 ,在合适条件下 ,湿×加杂种松扦插生根率高 ,平均可达 95 .0 %以上 ,扦插苗根系、抽梢生长良好。荫棚环境、遗传因素对生根率、每株不定根数、抽梢长均有显著的影响 ,微型荫棚与大型荫棚相比 ,所扦插苗木的这 3个指标要分别高出 2 .2个百分点、1.39条、8.6 5cm ,但大型荫棚生根较微型荫棚要快 ;家系间这 3个指标的极差分别为 4 .2个百分点、1.4 1条、4 1.75cm。插前采用 1g·L- 1多菌灵水溶液或 5 0mg·L- 1的ABT 1号生根粉 1g·L- 1多菌灵水溶液浸泡穗条 4 7h可有效地提早生根时间和增加扦插苗的高生长。广东中、南部地区冬、春季荫棚内 ,插后 4 0d穗条已全部愈合 ,插后 5 1 73d、84 132d为生根高峰期 相似文献
18.
Liliana Muñoz-Gutiérrez J. Jesús Vargas-Hernández Javier López-Upton Marcos Soto-Hernández 《New Forests》2009,38(2):187-196
Taxus globosa (Mexican yew) is a conifer endemic to México and Central America. It produces a substance known as taxol, which is useful
in treatment of ovarian cancer. Because seed production for this dioecious tree is limited, and seed germination is extremely
difficult, the use of cuttings could facilitate propagation of this species. With the intention of massively propagating individuals
selected for taxol content, two trials were established in which the effect of substrate temperature (average temperatures
18 and 23°C), age (i.e., young vs. old shoots) and management of cuttings, as well as clone variation in rooting capacity,
were evaluated. Low temperature favored rooting (53 vs. 34% on average for the two trials); younger shoots rooted three times
(61 vs. 23%) more than mature ones, while basal wounding did not affect rooting capacity. A wide variation was found in rooting
capacity of clones (8–76%), which could be associated with genetic or physiological differences among donor trees. 相似文献
19.
Influence of nitrogen,photoperiod, cutting type,and clone on root and shoot development of rooted stem cuttings of sweetgum 总被引：1，自引：1，他引：0
Rieckermann Heidi Goldfarb Barry Cunningham Michael W. Kellison Robert C. 《New Forests》1999,18(3):231-244
This study was designed to test the effects of nitrogen fertilization, photoperiod, cutting type, and clone on root and shoot development of stem cuttings of sweetgum (Liquidambar styraciflua). Differences in the growth of roots and shoots were observed as a result of weekly applications of varying levels of nitrogen (N) fertilization (0, 25, 50, 100, or 200 mg N/liter). As the concentration of N increased, new-shoot dry weight increased, but root dry weight decreased at rates greater than 50 mg N/liter. The percentage of rooted cuttings surviving also decreased as N concentrations increased past 50 mg N/liter. A night-interruption light treatment did not significantly affect survival percentages or the amount of root and shoot growth. Across all treatments, only 46% of all cuttings produced new-shoot growth within a 15-week period following rooting. Cutting type (terminal or sub-terminal) affected rooted cutting development. A higher percentage of terminal cuttings survived and were deemed plantable. In contrast, sub-terminal cuttings produced more shoot and root growth. Differences among clones were observed for all traits measured.Manipulating N fertilization, in conjunction with using clones that propagate well, has the potential of producing rooted cuttings of a size adequate for plantation establishment. However, higher percentages of cuttings that produce new shoot growth shortly after rooting must be achieved. 相似文献
20.
竹片法胡椒快速繁殖技术的试验表明,以椰糠、土、沙(体积比为1∶1∶1)为扦插基质的成活率最高,达100%;以椰糠和沙(1∶1)作为竹片内填充的生根基质,茎蔓生长快,平均生长速度1.0cm/d繁殖产生的单节插条苗的平均根数、平均根长、平均节间长分别为8条、4.0 cm、6.3 cm。竹片繁殖技术是一种成功的胡椒种苗快速繁殖技术。 相似文献