园林绿化树种嫩枝扦插试验

2002～2003年采集65个园林树种1年生枝条27 000段进行了嫩枝扦插试验,从中选出易生根树种34种、不易生根树种6种、难生根树种7种、爆发性生根树种10种和不生根树种8种,为园林绿化苗木繁育工作提供了基础数据.     

金叶钝齿冬青等彩叶灌木新品种扦插育苗试验

通过对金叶钝齿冬青等彩叶灌木新品种的全封闭扦插育苗试验，掌握了各树种的扦插难易程度。金叶连翘、花叶柳最易扦插成活，金叶钝齿冬青、红叶石楠、金叶锦熟黄杨次之，而金边构骨扦插较难成活，在扩繁方式上应采用嫁接繁殖，繁殖系数会更高。从生根类型上来看，芽间生根的树种最易扦插成活，且生根率较高，芽基生根次之，而愈伤组织生根的成活率一般比前二者低，生根时间也晚一些。全封闭扦插育苗方法始终要保持床内饱和的湿润状态是此项技术成败的关键。     

楸树无性繁殖技术

楸树是我国珍贵的优质用材树种和名贵的园林观赏树种，综合利用价值高，但楸树实生繁殖较为困难，介绍了楸树嫁接与萌芽扦插繁殖技术，并对萌芽扦插生根情况进行研究，认为萌芽扦插是楸树快繁值得推广的技术。     

广东省樟科树种的园林特性评价

收集广东省樟科乡土树种的树种性状,利用层次分析法（AHP）对广东省樟科树种开展园林特性评价。构建了评价模型和评价标准,建立观赏性C1、资源潜力C2、适应性C3、经济效益C4四个约束层,确定了18个评价指标;进行各因子权重分析后发现最重要的五个因素分别是抗逆性P14、树形P1、繁殖难易P11、季相P8、土壤适应性P15。通过数据分析,从中筛选出28种具有园林应用前景的种类,探讨了乡土树种筛选评价的方法。     

园林树木的扦插繁殖

本文较为详尽的论述了园林树木扦插繁殖的定义、生根机理、优缺点,扦插的几种方法,并以嫩枝扦插为例说明扦插的具体过程,分析影响扦插生根成活的因素,最后介绍了几个常见树种的扦插方法。     

红锥采穗圃营建及其穗条的扦插育苗试验

红锥是我国极具推广和开发价值的南亚热带优良速生珍贵用材树种。为了获取红锥大量扦插繁殖用的穗条,营建其采穗圃,经大量的试验研究,探索到了较为完备的红锥采穗圃营建技术。通过对所采穗条开展的扦插育苗试验,探明了不同的穗条处理方式、不同扦插季节、不同扦插基质、不同生根药物和采穗母株对其穗条扦插生根的难易。致使红锥穗条的扦插生根率最高可达90%以上。     

高海拔地区大树移栽保活综合技术——以民乐县城西区绿化工程为例

随着经济社会的发展以及城市建设水平的提高,大树被越来越多地应用于各类园林绿地中。提高高海拔地区大树移栽成活率,是景观生态工程建设的关键。根据民乐县地理自然气候,选择适宜高海拔地区移栽的主要树种,提出了土壤盐碱改良、树种注射营养液、树种保湿、应用生根剂、树根防腐等技术的综合应用,使大树移栽成活率大幅提高。     

美国红栌的扦插繁殖

美国红栌（Cotinus coggyaria）是一种新型的彩叶树种,具有很高的园林价值。通过使用不同浓度的生根剂一吲哚丁酸（IBA）,对美国红栌不同类型的枝条（包括半木质化枝条、完全木质化枝条、未木质化的嫩梢枝条）进行处理,测定各种插穗生根率及生根条数。结果表明：使用1500mg／L吲哚丁酸（IBA）溶液处理的美国红栌插穗生根率最高,生根条数最多;而在生根插穗中又以半木质化的插穗生根率最高,生根条数最多。     

意西法三国19个油橄榄品种扦插生根力差异比较

油橄榄的繁殖方法甚多,软枝扦插是目前主要采用的繁殖方法之一。因此摸清不同品种扦插生根的难易是必要的。本试验特就一九七九年自意大利、西班牙和法国引进的十九个油橄榄品种的扦插生根情况进行了观察,分析了各自生根的难易。     

黄花忍冬扦插育苗技术

黄花忍冬叶片深绿至淡蓝,花冠黄色花量大,花期长,抗寒力强,是北方寒地难得的园林观赏树种。可用硬枝、嫩枝进行扦插繁殖,硬枝插穗应用生根剂进行处理。插后灌足水,嫩枝扦插的河沙做基质,插后罩网,喷水,生根后撤网,追肥,搞好冬前的插床防旱。     

不同生根剂对中国石竹扦插生根的影响

本试验以中国石竹为插穗,珍珠岩＋蛭石（1：1）为基质,分别采用吲哚乙酸（IAA）、吲哚丁酸（IBA）及萘乙酸（NAA）与两者相混的生根剂处理插穗,研究了不同生根剂对中国石竹扦插生根的影响。结果表明：用IBA＋NAA1000mg／L处理,可使插穗幼根提前形成,可促进根系生长旺盛,提高根系活力,但对可溶性糖含量无明显促进作用。     

连香树嫩枝扦插繁殖技术研究

以连香树(Cercidiphyllum japonicum)当年生枝条为材料,研究了不同植物生长调节剂、不同IBA浓度及其处理时间对插穗生根的影响。结果表明:连香树属于皮部生根型,只有极少数为愈伤组织生根。植物生长调节剂处理是提高嫩枝插穗生根能力的一个必要措施,其中IBA对连香树插条生根效果最好,NAA次之,IAA最差。采用IBA 100 mg.L-1+NAA 100mg.L-1混合处理嫩枝插条效果最好,生根率达到81.67%,且幼苗长势良好。IBA 500 mg.L-1快蘸处理8 s,生根率达到71.67%;IBA 200 mg.L-1浸泡6 h,生根率为77.78%。综合各项生根指标,采用IBA 100 mg.L-1+NAA 100 mg.L-1浸泡嫩枝插条4 h,最适宜连香树插条生根。     

论不同生长调节剂对蒙古栎嫩枝扦插生根的影响

蒙古栎是我国难以生根的树种,常应用生长调节剂促进插条生根,提高林分产量。基于此,通过使用吲哚丁酸、萘乙酸、生长调节剂生根粉以及吲哚丁酸和萘乙酸混合溶液四种生长调节剂,分析蒙古栎扦插生根受到的影响,并采取最佳方案促进蒙古栎嫩枝扦插生根,有效改良生根种植,促进生产量的增加。     

赤桉人工种子制备过程中微芽繁殖体转株的研究

实现包裹后的微芽繁殖体的生根和萌发生长即转株是以微芽为繁殖体制备人工种子中较为重要的环节之一。本试验系统地研究了生长调节剂种类、浓度以及微芽发育状态与赤桉（Ｅｕｃａｌｙｐｔｕｓｃａｍａｌｄｕｌｅｎｓｉｓ）微芽转株的关系，研究了包裹基质中直接添加诱导生根的生长调节剂及微芽生根预诱导对包裹后微芽转株的影响。试验结果表明：ＮＡＡ较ＩＢＡ和ＩＡＡ有较好的诱导微芽生根的效果；选取幼嫩及活跃生长的微芽是获得较高生根率的重要环节；包裹基质中直接添加诱导生根的生长调节剂未能解决包裹后微芽转株的问题；微芽经生根预诱导再附带生根介质包裹对微芽转株有良好的促进作用。微芽包裹后二周生根率可达８１３％，三周后转株率可达８３３％。     

Metabolic changes during adventitious root primordium development in <Emphasis Type="Italic">Tectona grandis</Emphasis> Linn. f. (teak) cuttings as affected by age of donor plants and auxin (IBA and NAA) treatment

Aging of the donor tree decreased adventitious root formation in shoot cuttings of Tectona grandis Linn. f. (teak). Exogenous application of auxins, i.e., α-naphthalene acetic acid (NAA) and indole-3-butyric acid (IBA) has a significant positive effect on the percentage of rooting. The maximum percent rooting was obtained with 4,000 ppm IBA as compared to other treatment. Significant increase in root number was recorded in shoot cuttings treated with 4,000 ppm NAA. The overall rooting response was better in the treatment with IBA rather than with NAA. Further periodic samples (0, 10, 20, and 30 days) were taken to assess the total soluble sugar, starch, protein, and peroxidase (PER) activity in the rooting zone of shoot cuttings of teak during adventitious root formation. Application NAA and IBA to shoot cuttings resulted in an increase in the level of total soluble sugar, starch, protein, and PER-activity in the rooting zone. The stored carbohydrates were utilized during adventitious root formation. Hence, total soluble sugar and starch contents of cuttings, irrespective of age of donor plants, decreased with the passage of time in cuttings planted for rooting. Significant fluctuations were observed in the protein content of cuttings during the time of root induction. There was an increase in the protein content with the passage of time from the day of planting up to its 20th day, followed by a sharp decline in the protein content of cuttings at the 30th day of planting, irrespective of the age of donor plants or the treatment of cuttings with auxins. Irrespective of donor plant age, PER-activity in the cuttings increased from the day of their planting for rooting up to the 20th day, and then declined at its 30th day of planting. It was interesting to note that PER-activity remained higher at all stages in the cuttings of 2-month-old seedlings which rooted profusely as compared to the cuttings of 15- and 30-year-old donor plants those rooted poorly. This study suggested that the exogenously applied NAA and IBA at different concentration seems to activate sugar metabolism for release of energy, protein and PER-activity which are necessary for cellular division and differentiation during adventitious root primordium initiation or development in the rooting zone of shoot cuttings.     

4种生长调节剂对三角梅扦插生根的影响

2009年在昆明市松花坝苗圃地,以三角梅4年生健壮母树上1年生枝条为插穗,利用不同浓度（50 mg/L、100 mg/L、150 mg/L、200 mg/L）的4种生长调节剂（ IAA、 IBA、 ABT1、 NAA）分别处理三角梅插穗后进行随机区组扦插试验,调查各生长指标,并进行方差分析。结果表明,相同条件下,不同生长调节剂的不同浓度水平对三角梅插穗的影响不同,以IAA 50 mg/L浸泡24 h的插穗,扦插生根效果最好,平均生根数为18根,平均根长为3.95 cm,生根率为91.67％;用100 mg/L的IAA处理的插穗,扦插生根效果次之。4种生长调节剂处理插穗的生根效果依次为IAA、 IBA、 ABT1、 NAA,均显著优于对照。     

Variation in rooting behavior of stem cuttings in relation to their origin in Taxus wallichiana Zucc.

The present study investigates optimal conditions for the vegetative propagation of Himalayan yew Taxus wallichiana Zucc., an important medicinal tree, during spring. Effect of four treatments: (a) sex of donor plant (male and female), (b) age/type of shoot (1, 2, 3 year old, long and dwarf shoots), (c) auxin treatment (IBA and NAA at 0, 0.5, 1.25, 5.0 & 50.0 mM) and (d) rooting environment (raised beds/polythene bags) on percentage rooting in stem cuttings was studied. Randomized complete block (RBD) designs were used for experimentation. Rooting ability of cuttings was significantly influenced by all these treatments. The overall rooting response was higher in long shoot cuttings taken from female tree. Age of shoot also influenced the rooting response and was highest in 1 year old long shoot cuttings of female tree. Exogenous application of auxin, α-naphthalene acetic acid (NAA) and indole-3 butyric acid (IBA), had significant positive effect on the percentage rooting. IBA significantly enhanced the rooting percentage in 1 year old long and dwarf shoots at lower doses and 2 and 3 year old long shoots from female tree at higher doses. Maximum percent rooting (90% ± 2.8) was obtained with interactive effect of 0.5 mM, NAA (22 h) × 1 year old long shoot from female tree; followed by the interactive effect of 50 mM IBA (5 s) × 3 year old long shoot from female tree (83% ± 4.1). Cuttings planted in soil: sand medium in polythene bags showed earlier rooting response (12 weeks) than cuttings planted in raised nursery beds (24 weeks). Overall, the findings of this study suggest that 0.5 mM IBA treatment is suitable for enhancing adventitious rooting in 1 year old long and dwarf shoots of male and female trees. IBA at higher doses is suitable for enhancing the rooting percentage of 2 and 3 year old long shoots from female tree. This study provides a significant lead towards the development of a simple and inexpensive technique for large scale propagation, aforestation of elite genotypes and raising of bush type plantation under ex-situ conditions.     

不同植物生长调节剂对美人梅硬枝扦插生根的影响

不同组合和质量浓度植物生长调节剂处理美人梅硬枝插穗试验结果表明：（1）不同植物生长调节剂及质量浓度促根效果不同：NAA、IAA和IBA都表现出低质量浓度促进生根,高质量浓度抑制生根的现象;同时低质量浓度的生长调节剂能使愈伤组织形成提前10～20 d,从而促进提前生根。NAA250 mg/L（浸泡30 min）处理调节生根率最好,其次是IAA500 mg/L（浸泡30 min）的处理,分别达56.67%,54.44%;在对平均单株生根数量上却以IAA500mg/L（浸泡30 min）处理效果最好,平均达11.48条。（2）NAA 250 mg/L不同浸泡时间对美人梅扦插生根效果不同：在供试质量浓度范围内,随着处理时间的增加,生根率、单株平均生根数量均增加,以NAA250 mg/L处理60 min促进生根效果最好,平均生根率达71.11%,平均生根数达10.68条。     

不同生长素处理对桉树无性系插条氧化酶活性影响的比较研究

尾叶桉MLA无性系 (简称MLA)是扦插难生根无性系 ,尾叶桉U6 无性系 (简称U6 )和刚果 12号桉W5无性系 (简称W5)是相对易生根无性系。分别用吲哚乙酸 (IAA)、吲哚丁酸 (IBA)、萘乙酸 (NAA)处理MLA、U6 和W5插条后 ,各无性系插条体内的过氧化物酶 (POD)、多酚氧化酶 (PPO)、吲哚乙酸氧化酶 (IAAO)活性呈现规律性的升高。在生根过程的不同时期 ,各酶的活性差异极显著 ,表明桉树插条的不定根发生和发展与POD、PPO、IAAO活性有密切联系。而IAA、IBA、NAA对不同无性系和不同的氧化酶活性的促进效果也有显著差异。讨论了生长素促进桉树插条氧化酶活性和不定根发生与发展的机理     

黄蔷薇嫩枝扦插育苗技术试验研究

黄蔷薇嫩枝扦插育苗的成活率受很多因素的影响。通过试验研究表明,在以蛭石为扦插基质,用IAA、IBA、NAA处理插穗时,以IBA30mg/L,NAA20mg/L的浓度成活率较高,扦插后,加强扦插苗的水分、光照、温度、病害和施肥管理,可以进一步促进插穗的生根和生长。