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1.
黄少华 《防护林科技》2011,(5):23-25,37
通过田间试验设计研究了不同生根促进剂种类(A)及其浓度(B)对光皮桦扦插生根率及生根数的影响差异,不同木质化程度的插穗(C)及不同插穗长度(D)对光皮桦扦插生根率及生根数的影响差异,不同插穗下切口型(E)及母株不同部位的插穗(F)对光皮桦扦插生根率、生根数及生根长的影响差异。结果表明,采用ABT-1#(A1)800 mg.kg-1(B3)效果最好,扦插苗生根率高且生根数多;选择半木质化的绿枝插穗(C2)及插穗长度采用10.0~12.0 cm(D3)效果最好,扦插苗生根率高且生根数多;插穗下切口型采用斜切(E3)及配合母株中部(F2)所产的插穗对光皮桦扦插生根率、生根数及生根长均有显著差异。  相似文献   

2.
为欧洲云杉扦插育苗选择适宜的激素处理提供依据,本研究采用激素种类(A)、浓度(B)和浸泡时间(C)三因素析因设计,研究各因素及其交互作用对欧洲云杉扦插育苗的影响,并运用隶属函数法对其处理组合育苗效果进行评价,筛选出最佳处理组合。结果表明:三因素中,激素种类对欧洲云杉扦插育苗效果影响最大,其生根率、生根数和最长根长的影响都达到极显著水平(P0.01);浓度和浸泡时间对扦插育苗影响较小,未达到显著水平(P0.05);仅浸泡时间对生根数存在的影响(P0.05),以1 h最优。因素交互作用中,激素种类×激素浓度、激素种类×浸泡时间和三因素交互作用显著影响欧洲云杉插穗的生根率和最长根长;激素浓度×浸泡时间仅对最长根长有一定影响,互作效益较小。隶属函数综合评价表明:100 mg·L~(-1)的ABT1与浸泡0.5 h组合的生根率为80%,分根数和最长根长等指标表现极佳,可以作为欧洲云杉扦插育苗最佳激素处理组合。  相似文献   

3.
不同激素处理对1年生云南松的嫩梢扦插生根的影响   总被引:5,自引:0,他引:5  
以1年生云南松的嫩梢作插穗,分用不同激素、激素的不同浓度和浸泡时间处理插穗,在温室沙床上进行扦插试验,研究其生根率的大小及差异。试验所获的插穗平均生根率为64.98%,最高为93.33%,最低为40.00%。其方差分析结果表明:各处理间插穗的生根率存在显著差异,激素的浓度和浸泡时间是影响此试验结果的主要因素,其次为所用的激素种类。直观分析和多重比较得出理想的试验处理组合是:A2B2C1,即用200mg/L的NAA浸泡插穗120分钟。  相似文献   

4.
为探索阜新地区沙棘扦插繁殖最佳的外源激素处理条件,以该地区沙棘(辽阜1号)硬枝为试验对象,研究了激素不同种类、处理浓度和浸泡时间对沙棘扦插生根的影响。结果表明,外源激素的处理对沙棘插穗生根效果有一定的影响,激素不同种类、处理浓度和处理时间下生根效果有差异,其中生根天数、生根长度及生根数量差异不显著(P<0.05);生根率以100×10-6的IAA处理8h的插穗生根率最高,是最佳外源激素处理条件。  相似文献   

5.
西南桦冬季落叶插穗容器扦插育苗技术研究   总被引:1,自引:0,他引:1  
通过试验设计研究西南桦母株不同部位剪取的插穗(A)、不同基部径粗的插穗(B)及不同长度的插穗(C)对西南桦冬季落叶插穗容器扦插生根率、生根数及生根长的影响差异,比较了不同插穗下切口型(D)、不同轻型基质网袋容器(E)对西南桦冬季落叶插穗扦插生根率的影响差异。结果表明:西南桦母株中部剪取的插穗(A2)+基部径粗在2.1mm~3.0mm的插穗(B2)+长度16cm的插穗(C3)组合最好,其生根率高、生根数多且生根长;不同插穗下切口型的扦插试验中,以双削面(D3)最好;不同轻型基质网袋容器的扦插试验中,以E8最佳。  相似文献   

6.
研究了高,中柱式,矮台式整形修剪方法对不同年龄(2-10a生)日本落叶松采穗母株生长,产穗量,插穗生根(无激素处理)及2a生扦插苗生长的影响。结果表明:日本落叶松实生幼年母株每年进行整形修剪,虽然不能完全抑制老龄化对母株插穗生根的影响。但有助于幼化复壮母株组织。未加整形修剪的10a(实际为9.5a)生树形母株的插穗生根率只有24.8%。而同龄经不同剪控措施处理的母株插穗生根率可达55.2%-81.1%(平均64.9%),均极显著地大于对照。整形修剪方式不同,对母株生长(地径),产穗量和插穗生根率等的影响不同。高,中柱式母株由于修剪相对较轻,生长量大,产穗量高,3.5a,5.5a和8.5a生3个年龄阶段平均产穗量分别为110.5,237.0,173.0穗和85.9,150.7,98.0穗,均显著或极显著地大于矮台式母株(相应地分别为54.3,61.4,43.0穗)。高,中柱式母株虽在生长和产穗量方面具有明显的优势,但母株5.5a生以后插穗生根率呈下降趋势,至9.5a生时骤降至58.3%,55.3%。受连年重剪的影响。矮台式母株生长量小,产穗量小,死亡率高,但延缓老龄化和幼化效果好,7.5a以后插穗生根率才开始下降,与高,中柱式相比,母株插穗生根率开始下降的年龄推迟约2a,并且生根率下降的幅度小,至9.5a生时仍可达81.1%。母株幼年阶段(2.5a生)整形方式对2a生扦插苗的生长影响不明显,但当母株达到一定年龄阶段后(7.5a生)矮台式母株2a生扦插苗高度(44.8cm)显著大于高柱式母株(33.4cm)。为充分发挥采穗母株生产潜力和剪控的幼化效果,日本落叶松幼年实生母株在建圃最初几年应采用高柱式修剪,一定年龄阶段后(8a生)采用再截干幼化处理的方法降低母株高度,以改善插穗生根效果和延长采穗圃使用年限。  相似文献   

7.
不同处理对红雾水葛插穗生根的影响   总被引:1,自引:0,他引:1  
试验表明,对红雾水葛扦插生根影响最主要的因素是插穗部位,其次是激素种类厦浓度水平。红雾水葛以嫩枝扦插效果最好,在激素中以ABT生根粉和吲哚丁酸的效果较佳,而蔡乙酸的效果最差。生根效果最好的是A1B1C3和A1B3C12个处理,扦插后5d,分别有96.67%和86,67%的插穗形成愈伤组织,6d生根率分别迭80%和93.33%,12d全部生根,每株分别有新根90.6根和97,2根;而对照扦插后5d,有66.67%的插穗形成愈伤组织,6d生根率达83.33%,12d全部生根,每株仅有新根27根。  相似文献   

8.
不同生长激素和基质等因素对红叶石楠扦插生根的影响   总被引:3,自引:1,他引:2  
采用正交试验的方法研究了扦插基质、生长激素及其质量浓度和插条类型等4种因素3种不同水平处理对红叶石楠插穗生根率的影响.结果表明:影响红叶石楠插穗生根的主导因素是激素种类,其次是插穗类型和扦插基质,激素质量浓度的影响最小;激素IBA处理的插穗生根率极显著(α=0.01)优于NAA和GRR,绿枝中部和上部插条生根率极显著(α=0.01)优于下部,扦插在基质A1和A2更易生根.红叶石楠扦插的最佳处理组合为:以混合的珍珠岩、泥炭与砻糠灰(体积比1∶1∶1)为基质,选用绿枝中部插条,在IBA500 mg/L中浸泡2 h,扦插生根率高达98.12%.  相似文献   

9.
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   

10.
楸树嫩枝扦插试验初报   总被引:16,自引:3,他引:13  
通过品种、激素种类、激素浓度、插穗类型等4因素3水平正交试验,进行楸树嫩枝扦插育苗试验,考察影响楸树生根的主要因子,结果表明不同楸树品种间扦插生根率差异较大。激素浓度为插穗生根的主要影响因素,其次是品种和激素种类,插穗部位影响较小。单因子试验分析表明1 000 mg/kg浓度处理比500 mg/kg浓度处理生根效果更好。  相似文献   

11.
采穗园母株生根性状遗传变异和选择效应*   总被引:7,自引:2,他引:5       下载免费PDF全文
对3.5年生日本落叶松采穗园4个家系40株母株生根率、生根量和偏根率遗传变异,不同生根性状间表型相关研究表明,家系间生根率、生根量和偏根率差异尚达不到0.05的显著水平。但不同母株间上述差异均极显著。单株生根率、生根量等的遗传力大于家系,方差分量分别比家系大4~36倍。部分家系生根率与生根量、偏根率之间相关关系紧密程度不同,但生根量与偏根率之间各家系均呈极显著负相关。根据生根率、生根量综合评价结果,按50%入选率对采穗园进行淘汰,或用生根性状优异的母株扦插苗建第二轮采穗园,插穗生根率、生根量比总体利用水平可分别提高20.3%和29.8%,而又不致严重减少采穗园母株的遗传多样性。  相似文献   

12.
Effects of IBA and NAA treatments on rooting Douglas-fir stem cuttings   总被引:1,自引:0,他引:1  
Copes  D.L.  Mandel  N.L. 《New Forests》2000,20(3):249-257
The effectiveness of six IBA and fourNAA concentrations, four combinations of IBA and NAAconcentrations, and control were tested for theirability to enhance rooting frequency (%) ofDouglas-fir cuttings. Two IBA and one NAA treatmentswere also compared to the control for quality of rootsystem. Between 1984 and 1998, six independentstudies were conducted in mist or fog environmentswith the same 11 or 14 clones. Auxin concentrationstested ranged from 0 to 123 mM IBA and 0 to 10 mM NAA. Auxin, clone, and auxin by clone effects weresignificant in every study, although individual cloneanalyses showed only two clones to differsignificantly for auxin. All auxin treatments but the10 uM NAA treatment induced significantly greaterrooting percentage than the control, but no singleauxin, auxin concentration or combination of auxinswas clearly superior in every study. The 10 mM NAAconcentration was the only concentration tested thatreduced rooting percentage to less than the control. Both NAA and IBA appeared to have broad ranges ofroot-enhancing activity. However, within theeffective range of IBA evaluated, 24.6 mM produced thegreatest rooting percentage in four of five studiestesting IBA. NAA solutions with concentrationsbetween 2.5 and 7.4 mM NAA generally resulted insimilar rooting success. Rooting responses toincreased IBA and NAA were both nonlinear; rootingdecreased with both too little and too much auxin. Combinations of IBA and NAA in the same solution didnot increase rooting percentage above what wasachieved with one auxin. For root system quality,auxin treated cuttings in one study, had significantlybetter root systems than control, but there was nodifference in the other study in which root qualitywas estimated.  相似文献   

13.
金叶女贞嫩枝扦插生根效果的正交优化   总被引:1,自引:0,他引:1  
采用L16(45)正交试验设计,研究了外源激素种类、激素浓度、枝条部位和浸泡时间对金叶女贞嫩枝插穗生根效果的影响。研究结果表明,外源激素种类(A)、激素浓度(B)、枝条部位(C)和处理时间(D)对金叶女贞嫩枝插穗根系效果指数的影响均达极显著水平,各因素对根系效果指数影响的主次顺序为枝条部位(C)>激素浓度(B)>处理时间(D)>激素种类(A)。以采用金叶女贞嫩枝枝条的中下部做插穗,经100 mg/L ABT2处理60 min生根效果为佳。其生根率为100%,插穗的平均根系数量为33.93条,平均根长为3.73 cm,根系效果指数为12.50。  相似文献   

14.
Leaf area, IBA concentration and age of stockplants were all found to be important factors for successful rooting for vegetative propagation using single-node cuttings of the two main African mahogany species: Khaya anthotheca and K. ivorensis. Cuttings with leaf area of 30–50 cm2 had the best rooting percentage and cuttings with about 30 cm2 had the most number of roots per cutting in K. anthotheca. Khaya ivorensis, cuttings with 10–30 cm2 leaf area had the highest rooting percentage. Cuttings collected from 1-year-old stockplants recorded the highest rooting percentage and largest number of roots per cutting. Cuttings from 3-year-old stockplant of the same seeds sources had the lowest rooting suggesting aging negatively impacted rooting ability. The effect of auxin concentration, on rootability was examined with cuttings of K. anthotheca. An IBA concentration of 0.8% was the best exogenous auxin concentration for percentage rooting, number of roots per cutting and the length of the longest root per cutting.  相似文献   

15.
Brennan  Eric B.  Mudge  Kenneth W. 《New Forests》1998,15(1):37-51
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   

16.
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   

17.
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   

18.
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   

19.
全光照自动喷雾条件下毛红椿嫩枝扦插正交试验分析   总被引:3,自引:0,他引:3  
在全光照自动喷雾条件下通过正交实验L9(34),2013年4~6月研究插穗粗度、插穗长度、激素处理时间和基质4个因素对1年生毛红椿嫩枝扦插的影响。结果表明,毛红椿嫩枝扦插生根均属皮部生根型,不同处理对嫩枝扦插生根、苗木生长均有显著影响,各因素对发根数量影响大小依次为插穗粗度〉插穗长度〉激素处理时间〉基质,对最长根长度、生根率、根系效果指数的主次效应均是基质〉插穗粗度〉插穗长度〉激素处理时间,插穗粗度是扦插发根数量的决定因素,基质对扦插生根起重要的主导作用。本次扦插最佳组合为:插穗粗度0.31~0.4 cm、长度4.1~6 cm、300倍根太阳生根剂浸泡5 s、膨化蛭石+泥炭土3∶1基质,扦插生根成活率高达95.1%,将有利于毛红椿嫩技扦插的规模化设施育苗。  相似文献   

20.
Applied auxin, node position, leaf area and cutting length were examined to investigate the requirements for rooting stem cuttings of Khaya ivorensis. All these variables were shown to be important factors affecting rooting, confirming the hypothesis that successful rooting can be achieved if these primary variables are optimised.The best concentration of the auxin IBA was found to be 200 g per cutting, which hastened rooting, increased the percentage of cuttings rooted and increased the number of roots per cutting. One clone (8013) was unresponsive to auxins in terms of the percentage of cuttings rooted, but was the most responsive in terms of the numbers of roots per cutting. A greater percentage of cuttings from basal nodes were rooted than from apical nodes. Cuttings cut squarely at the base produced a radially-arranged root system, whereas an oblique cut resulted in a one-sided root system.Trimming the leaf area of cuttings to 10 cm2 gave greater rooting percentages than trimming to 100 cm2. In general, long cuttings (39 mm) rooted better than short cuttings (19 mm), however, there was an interaction between leaf area and cutting length, in which cuttings with short stems and large leaves had the lowest rooting percentage.  相似文献   

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