提高樟子松插穗生根力的研究

通过不同光质对插穗生长的影响，采穗前插穗的培育、采穗后插穗的处理以及扦插后促进插条的生长试验的研究结果表明，培育萌芽枝，其生根率可达到84％；经黄化、环割、割插、综合性洗脱和灰色塑料膜遮荫等处理，其生根率可提高17％－33％。     

黄心夜合秋季嫩枝扦插效应分析

试验表明，黄心夜合无性繁殖其穗条扦插生根率有显著差异，参试无性系生根率为32％-93％；穗条带1-2叶可显著提高穗条生根率；穗条带多片叶或不带叶其生根率显著降低；GGR生根剂不同浓度处理后的穗条其生根率有显著差异；多菌灵不同浓度处理后的穗条其生根率没有显著差异。     

几种因素组合对红豆杉扦插成活率的影响

扦插季节、插床基质、药剂的选用及浓度处理等因素对红豆杉（TaxusChinesis（pilger）Rehd）扦插成活生根率及生根速度有明显影响．试验结果表明：春夏扦插试验最优组合都为B2C1D2；春播和县插生根率和生根速度有明显差异，春插需96天才开始生根，生根率最高为36．00％；而夏插只需85天就开始生根，生根率最高为86．00％；药剂类型以奈乙酸100×10－6效果最佳，插床基质以珍珠岩效果最佳．     

芦荟吸芽离体培养和植株再生

芦荟吸芽在MS＋BA3－4mg/L＋NAA 0.5-0.7mg/L的培养基中，产生丛生芽；转入MS＋BA 2.0-3 NAA0.5-0.7mg/L继代培养时，芽生长健壮；切割不定芽在1／2MS＋ABT1.5-2.0mg/L培养基中可诱导生根，生根率达90％以上。每年3－6月，9－10月移栽于河沙：Luo石为3：1的基质内，移栽成活率达80％以上。     

小叶乌饭硬枝扦插育苗试验

对小叶乌饭进行扦插繁殖试验，结果表明，4种扦插基质中，以黄心土为基质的扦插生根率最高，生根率为27％；在扦插前用激素处理插条可促进其生根，3种试验激素中，以吲哚乙酸200mg／l处理的插条，生根效果最好，生根率达37％。     

竹柏繁殖试验研究

竹柏通过播种和扦插，获得以下试验结果。播种育苗。最高发芽率９０．０％，平均８０．０％，一年生苗最高１０．７０ｃｍ，平均为８．２７ｃｍ；地径最粗生长为０．３１４ｃｍ，平均０．２３５ｃｍ。扦插试验；春插，α－奈乙酸和吲哚乙酸以珍珠 为基质生根率最高，分别是７０．００％和４０．００％；夏插；α－奈乙酸和吲哚乙酸在基质黄心土直的生根率最高，分别是７６．７０％，８３．３０％。     

日本落叶松插穗生根及家系母株间生根能力差异研究

冀北山区日本落叶松半木质化插穗夏插３０天后开始生根，从扦插至大部分插穗生根需要６２天。插穗经２００ｐｐｍＩＢＡ溶液处理２０ｍｉｎ后，生根率可达７６＾，延长处理时间至４０ｍｉｎ，生根率可提高到８６％以上。日本落叶松半同胞有系，母株间插穗生根率变异幅度大，分别为４０％＝９２％，１４．２％－１００％。生根性状在二种水平上均存在有巨大的改良潜力。因此，日本落叶松扦插繁殖生要物改良要实行家系选择和母株选择兼     

龙眼扦插育苗及丰产栽培技术研究

采用文中所介绍的技术、龙眼扦插４０天后即产生愈伤组织，愈合率达８６．６％；６０－９０天大量生根，生根率达８７．２％成活率达７４．５％；９０天后即可进行苗地移栽，成活率达９０．５％，１年一苗高６０－１５０ｃｍ，地径０．６－１．５ｃｍ，此时即可邮圃定植，２－３年挂果，４年进入丰产期，丰产效果显著。     

毛果含笑扦插繁殖法研究

本文报道了扦插基质、ＮＡＡ浓度、光照强度、插条的光合面积对毛果含笑（ＭｉｃｈｅｌｉａｓｐｈａｅｒａｎｔｈａＣ．ｙ．ＷｕｅｔＬａｗ）插条生根的影响．结果表明，扦插基质以珍珠岩：腐叶土：红壤＝１：１：１混合最好，生根率达６２％；ＮＡＡ１５０×１０－６处理校好，特别是当愈伤组织形成后，取出插条再次用１５０×１０－６的ＮＡＡ浸泡４小时效果更佳，生根率达７２％且可使插条比处理一次的提前２０～３０天生根；搞条带两片叶子生根较好，生根率达６８％，并且根系祖壮发达，在６０％的透光下生根较好．     

赤桉试管苗移栽及插插技术研究初报

组培苗自组培室移出３ｄ内栽完的成活率为７４％，１１ｄ内栽完的降低至２８．７％；扦插时气温１５．６℃以上生根率可达到８９．４％至９８％，１２℃以下生根率只有７１．３％；２号ＡＢＴ生根粉１００ｍｇ／Ｌ液浆处理插穗，生根率为９５．５％，     

Cutting propagation of <Emphasis Type="Italic">Santalum austrocaledonicum</Emphasis>: the effect of genotype,cutting source,cutting size,propagation medium,IBA and irradiance

Developing methods for routine clonal propagation of sandalwood (Santalum austrocaledonicum) is important for its domestication and development as a commercial agroforestry species. The amenability of this species to propagation by leafy stem cuttings in low-cost non-mist propagators was assessed in four separate experiments. These experiments evaluated the effects of (1) genotype (15 genotypes from two island provenances), (2) cutting position on the stock plant (apical, medial and basal), (3) cutting size (1-node/400 mm² and 2-node/800 mm² leaf area), (4) three propagation media [scoria (5 mm, air-filled porosity (AFP)—29%), vermiculite and perlite (1:1 v/v, AFP—46%) and vermiculite, perlite and peat (2:2:1 v/v/v, AFP—42%)], (5) indole-3-butyric (IBA) (3000, 4000 and 8000 ppm) and (6) irradiance in the propagator [daily light integral (DLI) 5.3, 3.9, 2.6, 2.2 mol m^?2 day^?1]. IBA, propagation media and cutting size had no significant effect on rooting percentage, root number or root growth. Evidence of provenance-based variation in rooting capacity was recorded with greater rooting success for genotypes from the island of Erromango compared with Tanna. Variation in adventitious root induction was also recorded between individual genotypes from Erromango across all four experiments. Cuttings collected from the apical and medial parts of the shoot on the stock plant had higher rooting percentage than those collected from the base. Differences in rooting capacity between apical and medial shoots were variable between experiments and may be attributed to different levels of hardening. The use of artificial shade (~?70%) to achieve a mean DLI of between 2.6 and 3.9 mol m^?2 day^?1 increased rooting percentage compared to both lower (2.2 mol m^?2 day^?1 or?~?90% shade) and higher (5.3 mol m^?2 day^?1 or?~?50% shade) irradiance treatments. Leaf retention of cuttings in the propagator was positively associated with the percentage of cuttings with adventitious roots, with highest percentage in cuttings with full leaf retention, regardless of original cutting size. This study demonstrated S. austrocaledonicum seedlings can be successfully propagated by cuttings provided the propagation conditions are optimized for each genotype.     

Clonal propagation of Pterocarpus santalinoides L'Hér. ex DC.: the effect of substrate,cutting type,genotype and auxin

Pterocarpus santalinoides is a multipurpose tree species, native to Africa and South America. However, excessive pruning for fodder is jeopardising its seed production leading to poor regeneration in the Sahel region. Efficient vegetative propagation techniques may overcome this concern. To address this issue, four experiments were conducted to determine the effects of substrate (Experiment 1), cutting type (Experiments 2 and 3), genotype (Experiment 4) and auxins (Experiments 1, 2, and 4) on rooting ability in a non-mist propagating unit in Mali. Among the four tested substrates, no significant differences were found in rooting parameters, including the percentage of rooted cuttings, the number of roots and secondary roots per rooted cutting, and the length of the longest root per rooted cutting. Semi-hardwood cuttings rooted significantly better than softwood cuttings with a higher percentage of rooted cuttings (31.7?±?6.5% vs. 9.2?±?2.7%), greater number of roots (8.2?±?4.8 vs 1.5?±?0.7), greater number of secondary roots (16.7?±?4.2 vs 4.6?±?1.8) and longer root length (17.8?±?12.0?cm vs 2.3?±?1.0?cm) per rooted cutting. In addition, one-node cuttings cut below the second and third nodes, respectively, had the highest rooting success (88% and 90%, respectively) followed by cuttings cut below the fourth node (68%) and the first node (62%). Significant differences in the percentage of rooted cuttings were found among 12 randomly selected genotypes with rooting varying from 2% to 75%.The results also showed that auxin application, especially IBA, had a significant effect on rooting success, the number of roots and secondary roots per rooted cutting. Single-node cuttings, and cuttings of 10?cm length with multiple softwood and semi-hardwood nodes, can be used with or without auxin treatment for successful clonal propagation of P. santalinoides. The results of the present study indicated that P. santalinoides is amenable to clonal propagation using low-cost propagators and sand-based rooting media.     

落叶松扦插繁殖配套技术的研究

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。     

不同穗条类型、长度的欧洲云杉扦插苗质量评价

[目的]为欧洲云杉扦插穗条选择和扦插苗培育提供依据。[方法]采用完全随机区组试验设计,研究了2种穗条类型(嫩枝基部带1.5年生硬枝、嫩枝)、3种穗条长度(5 10、10 15、15 20 cm)的嫩枝扦插苗从移植当年到第3年的成活率、保存率和生长情况。[结果]2种穗条类型扦插苗间的移植成活率和保存率差异不显著,但移植后嫩枝基部带1.5年生硬枝扦插苗的苗高、新梢生长量、地径、侧枝数、冠幅、鲜质量、干质量差异显著,都是嫩枝基部带1.5年生硬枝扦插苗大于嫩枝扦插苗。3种长度扦插苗的移植成活率、保存率的差异均显著;其中,15 20 cm长度穗条扦插苗移植成活率和保存率最高,分别是98.00%和86.00%,不同长度穗条扦插苗移植成苗率逐年下降,而且与穗条长度有关,弱小穗条获得的扦插苗成苗率低;5 10 cm的扦插苗移植成活率为46.00%,到第3年时保存率仅为23.33%,且移植后苗高、新梢生长量、地径、侧枝数、冠幅、鲜质量、干质量的差异也显著,且都以15 20cm穗条的扦插苗值最高,10 15 cm穗条的扦插苗次之,5 10 cm的扦插苗最小。嫩枝带硬枝扦插苗的苗木质量指数(QI)是嫩枝的7.74倍,15 20 cm穗条的扦插苗质量指数(QI)是5 10、10 15 cm扦插苗的5.47、5.23倍。扦插苗地径初始值与移植当年地径、苗高初始值与移植当年苗高间呈极显著正相关关系。[结论]扦插苗最初的生根状况和穗条质量影响后期培育过程中的存活和生长,嫩枝基部带1.5年生硬枝扦插苗和15 20 cm穗条的扦插苗不仅移植成活率、保存率高,而且生长量、生物量、质量指数都比短而弱小穗条的扦插苗高。     

母株年龄和插穗基部切削方式对日本落叶松生根的影响*

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     

湿地松、火炬松扦插繁殖技术研究*

对影响湿地松、火炬松扦插生根的基质、生根剂及浓度、插穗状况、扦插季节、扦插方式 、扦插后管理等因子进行了研究。较佳的扦插技术组合为：用砂性土作基质，在冬季或早春采集当年生半木质化的基部萌条，湿地松用生根剂１号低浓度，火炬松用生根剂１号或２号中等浓度浸泡１５ｈ，插后保温保湿并定期喷洒营养液，生根率可达９５％以上，温室扦插苗在５月上旬以前移入大田，当年生扦插苗高达３３－４４ｃｍ，主侧根发达，可出圈造林     

The Effect of Gravity on Root Emergence from Cuttings of Some Tree Species

Poplar shoots trained horizontally and normally growing shootswere used to compare the effect of horizontal and vertical orientationin summer on the subsequent rooting of terminal cuttings; asignificantly greater number of preformed roots emerged fromcuttings of vertical shoots. This difference in rooting abilitymay be due to the lower concentration of indolyl-acetic acidin the upper than in the lower half of horizontal poplar stemsas shown by Leach and Wareing (1967). Decapitation of a seriesof these poplar cuttings (Populus ? robusta Schn.) showed thatwound-root production was influenced by the larger terminalbuds on vertical than on horizontal shoots. From a comparison of horizontal and vertical storage of applerootstock cuttings at 45 ?F in the autumn, 29 per cent moreof the horizontal cuttings than the vertical ones had a basalcallus in the following February. Of these cuttings which madesatisfactory shoot growth (over 5 cm) in the following summer,horizontal cuttings exceeded vertical ones by 80 per cent; aresult which was correlated with root production. In a second experiment with M II apple rootstocks in which cuttingswere both stored and grown at the same angle more roots occurredon cuttings placed horizontally rather than vertically, andthis orientation also induced the rootings of a greater proportionof leafy Worcester Pearmain apple cuttings.     

沙松扦插繁殖技术研究

以沙松硬枝和嫩枝插穗为材料进行正交扦插试验,研究穗条母株年龄大小、药品种类、质量浓度、处理时间以及基质不同种类、穗条不同类型与不同着生部位对生根的影响,结果表明:影响硬枝和嫩枝扦插生根的主要因素均为穗条母树年龄大小,年龄越小,生根率越高,最优处理组合均为4~10 a母树穗条,用200 mg·L-1ABT1号生根粉浸泡12 h,生根率分别为21.4%、63.9%;嫩枝扦插生根率高于硬枝扦插,差异达到极显著水平。采用1/2珍珠岩+1/2河沙混合基质生根效果最好。穗条不同类型扦插生根存在差异,一级侧枝截制的穗条生根性状优于二级侧枝穗条和顶芽穗条,下部枝条截制的插穗生根率和根系效果均高于上部枝条。     

稀土对泡桐苗木生长效应的研究

农业上应用稀土已取得显著效益。为准确地肯定稀土对林业苗木的增产效用,并摸索关键技术,1987年至1989年,在温室和田间进行泡桐实生苗水培和埋根苗应用试验。水培试验部分地采用了植物稳态营养研究的理论和方法。