羊踯躅压条、扦插育苗技术初探

2004～2005年在玉溪市林木种苗工作站对羊踯躅进行压条和扦插育苗繁殖,结果为压条繁殖7月中旬、选取2～3年生枝条、环割2/3、喷洒300mg·kg-1ABT6号生根粉,低压生根成活率最高85%,高压生根成活率最高80%;扦插育苗时间最佳为8月中旬,ABT6号生根粉处理浓度200mg·kg-1、最佳基质是60%珍珠岩+40%泥炭土和底层40cm的细河沙,最高生根率为28%.     

生根粉浓度和环剥宽度对银杏高空压条生根的影响

为研究ABT 1号生根粉和压条环剥宽度对银杏高空压条生根和育苗成活率的影响,以扬州大学银杏资源圃内20年生银杏的枝条为试材,采用双因子试验,设定环剥宽度和ABT 1号生根粉浓度2个控制因子,环剥宽度设置7、12、18 mm 3个不同梯度,ABT 1号生根粉浓度设置0、500、1 000、1 500 mg/L 4个水平。结果表明:银杏枝条生根率随ABT 1号生根粉浓度的升高呈先上升后下降趋势,最佳浓度为1 000 mg/L。3种不同环剥宽度中,12 mm环剥宽度的愈伤组织产生率较高,可达90%以上,生根率也最高,达50%。但银杏枝条生根非常缓慢,高空压条需要在母株上生长3个月之久才能形成根系,移栽5个月后压条开始展叶,根系也进一步生长。此外,在母株上已形成根系的压条移栽成活率极高,达到100%,而形成愈伤组织的枝条移栽成活率较低,为56.67%,且植株的生长势较弱,根系形成也较弱。     

羊踯躅压条、扦插育苗技术初探

2004-2005年在玉溪市林木种苗工作站对羊踯躅进行压条和扦插育苗繁殖,结果为压条繁殖7月中旬、选取2～3年生枝条、环割2／3、喷洒300mg·kg-1ABT6号生根粉,低压生根成活率最高85％,高压生根成活率最高80％;扦插育苗时间最佳为8月中旬,ABT6号生根粉处理浓度200mg·kg-1、最佳基质是60％珍珠岩+40％泥炭土和底层40cm的细河沙,最高生根率为28％。     

琼岛杨高枝压条繁殖技术研究

为探讨琼岛杨高枝压条繁殖技术,研究了基质、生根粉、压条日期对琼岛杨高枝压条生根的影响。结果表明:泥心土+新鲜牛粪+椰糠(3:1:1)的混合基质更利于压条生根,1月份压条,涂抹ABT1生根粉可以显著提高压条生根效果,其中涂抹1500mg/L ABT1生根粉的压条生根率达76.67%,生根数为6.07条。     

北美冬青结果枝高空压条技术研究

研究了压条日期、环剥宽度、植物生长调节剂浓度和压条基质对3~4年生的盆栽北美冬青(Ilex verticillata)"奥斯特"结果枝高空压条成活率和生根率的影响。结果表明:4种不同浓度(原液、3/4原液、1/2原液、1/4原液、)的植物生长调节剂(NAA+IBA)处理能够提高压条的生根率,生根率可达100%;不同环剥宽度影响压条的愈伤率和成活率,环剥宽度过小(0.2cm),愈伤化严重,生根率降低,环剥宽度过大(1.5cm),成活率降低;3种压条基质以V_(泥炭)∶V_(珍珠岩)=3∶1混配基质效果最好,平均生根条数达10.73条,平均根长7.3cm。从综合指标看,压条时间选择在6-7月,环剥宽度0.5~1.0cm,以1/4~1/2原液浓度的植物生长调节剂处理最适宜。     

平欧杂交大果榛子全光照喷雾嫩枝扦插试验初报

平欧杂交大果榛子全光照喷雾嫩枝扦插试验结果表明,不同的处理浓度,不同的药物处理及时间对嫩枝扦插生根率和生根根量有显著影响。初步确定出平欧杂交大果榛子嫩枝扦插生根适宜组合为1号ABT生根粉100mg/kg处理时间2h生根率为60%。     

金花茶高空压条繁殖技术

研究不同生长调节剂、基质、环剥宽度和压条径粗对金花茶高压繁殖生根成活率的影响,结果表明:在5月份,选取径粗1.1～1.5 cm的营养枝作压条繁殖材料,在枝条平直处作带宽1.6～2.0 cm的环剥处理,用1 000 mg.L-1的ABT生根粉或萘乙酸(NAA)溶液涂刷环剥切口上方,以竹屑、苔藓作包扎基质,能明显提高金花茶高压繁殖苗的生根成活率。并总结了金花茶高空压条苗的离体移栽技术。     

大果沙棘全光照喷雾嫩枝扦插育苗试验研究

利用全光照喷雾嫩枝扦插育苗设备进行大果沙棘嫩枝扦插,推广和完善包头市大果沙棘快速繁育技术。结果表明:采用ABT生根粉1号,ABT生根粉2号,ABT生根粉6号处理嫩枝插穗,均对插穗生根有较好的效果,用当年生半木质化嫩枝条,在圆形沙床上扦插,生根率可达90%以上,当年6~8月扦插,40~60d后移到普通苗床上继续生长,大果沙棘育苗成活率可达80%~90%。     

文冠果的扦插育苗试验

采用不同母株年龄的穗条,不同基质及不同浓度的生根剂进行文冠果的扦插育苗试验。结果表明：文冠果插条随母株年龄的增大其生根率、生长量下降;温室内扦插生根率高、地径大,生长快;用ABT6号生根粉处理的插条生长势好、生根率高;温室扦插总体要比大田扦插效果好;用质量分数为100×10^-6～200×10^-6浓度的IBA浸泡1 h,能大幅度的提高扦插成活率。     

紫椴扦插繁殖技术的研究

通过L9(33 )正交试验 ,影响紫椴硬枝扦插生根的主要因素是穗条母株年龄 ,其次是激素的浓度 ,最佳组合筛选是采用 1～ 2年生枝条 ,用质量分数为 1.0× 10 -4的ABT生根粉催根处理 2 4h ,最高生根率达 82 .6 % ;通过L16(4 4 )正交试验影响嫩枝扦插生根的主要因素也是穗条母株年龄和激素浓度 ,经方差分析均达显著水平 ,最佳组合筛选出 1～ 2年生超级苗 ,采用ABT(质量分数为 1.0× 10 -4) +NAA(质量分数为 5 .0× 10 -5)处理 8h ,生根率最高 ,达88.5 %。     

栀子花压条育苗与栽培管理技术

采用2~3年生的栀子花枝条进行高空压条,在用塑料袋作外封闭包裹,内用湿润的砻糠灰作充填物的情况下,生根状况比较好;对于生根后的枝条进行剪离母体之后的花苗,进行盆栽或地栽,在不同的栽培形式下所采取的栽培与管理方法也有所不同。     

日本樱花高空压条繁殖技术研究

以3号生根粉和萘乙酸2种植物激素为生根剂,对日本樱花高空压条枝进行处理,2种生根剂各设50、100、150、200、300、600kg／L6种浓度,共12个处理,并以清水（CK）作为对照。经统计分析和Duncan新复极差比较,结果表明：3号生根粉和萘乙酸处理都有利于樱花根长和根数量的生长;以200kg／L3号生根粉其根长生长最好,平均根长达到103．81cm;以200kg／L萘乙酸处理,其生根数量最多,平均根数达到86．2根。     

Vegetative Propagation of Local Fruit Trees by Air Layering in the Guinean Savannah Highlands (GSH)

Over recent decades there has been a growing interest in the attributes of non-timber forest products (NTFPs) to food security, income generation, and poverty alleviation. In the Guinean Savannah Highlands (GSH) of West Africa, species producing these products are still in wild stands where they are subjected to various pressures. To conserve these species, their domestication is required. Air layering is a low-cost propagation technique easy to use by farmers. The present study aims at evaluating the effects of the wood type (hardwood, semi-hardwood, and softwood) as well as branch diameter (Φ ≤ 6.67 cm; Φ > 6.67 cm) in the rooting ability of the marcots (air-layered propagules) of Lophira lanceolata Van Tiegh. Ex Key., Parkia biglobosa (Jacq.) Benth, Syzygium guineense var. macrocarpum Engl., Vitex doniana Sweet., Vitex madiensis Oliv., and Ximenia americana L. The experimental design was a split-plot with three replications. The rooting percentage of the marcots varied significantly from 13.5 (X. americana) to 55.85% (Lophira lanceolata; p < .001). The diameter * wood type interaction was significant (p < .05) due to the high rooting percentage obtained in large semi-hardwood cuttings (40%). Lophira lanceolata, Syzygium guineense var. macrocarpum, and Vitex madiensis were the easiest marcotting rooting species. Large branch diameters as well as semi-hardwood are suitable for layering. This information will help in developing appropriate domestication strategies.     

Air layering and its potential in propagating Uapaca kirkiana: a fruit tree from the miombo woodland,Tanzania

The potential to propagate Uapaca kirkiana through air layering was investigated at Igumbilo forest, Tanzania. The objective was to determine the effect of time of setting air layers and use of indole-3-butyric acid (IBA) to promote rooting. Air layers were initiated on young shoots, 1-to 2-years old, growing on mature trees. After root initiation, they were detached, potted and reared at the nursery for a further three months. Thereafter they were harvested and assessed. Two factors were investigated: effect of time at which air layers were initiated (June, September and December), and influence of IBA at 50, 100 and 150 mg l^?1concentrations. Varied rooting successes were realised, being influenced by time at which air layers were initiated, IBA concentration or both. Optimal rooting of 82.5% was realised in June-initiated air layers treated with 50 mg l^?1 IBA. Air layers initiated in December and treated with the control had the poorest rooting (46.7%). Application of 100 mg l^?1 IBA during June significantly improved the number of roots, root length and root biomass produced. The increase in rooting ability during June is partly linked to better nutritive status, since most plants at this time have sufficient food reserves acquired during the active photosynthetic rainy period of January–May. The period is also associated with minimal plant developmental activities such as budding and flushing, which are usually antagonistic to rooting. Thus, air layering is a potential technique to propagate U. kirkiana, and can contribute effectively to capture desirable traits rapidly disappearing because of ongoing deforestation and maintain the desired fruit tree attributes once attained. Further studies are recommended to determine its cost effectiveness in relation to other vegetative techniques.     

虾子花苗木繁殖技术研究综述

概述了虾子花的繁殖技术,包括实生繁殖和以扦插、微体繁殖为主的无性繁殖,介绍了这些繁育方式在印度和我国的研究现状,为今后相关工作提供借鉴。     

A Preliminary Report on Asexual Propagation of Pinus kesiya vat. langbianensis

通过高枝压接继代培养和扦插苗继代培养等方式对思茅松（Pinus kesiya var.langbianensis）进行了无性繁殖试验，结果表明：对不同母树年龄的思茅松枝条进行高枝压接均能生根，而且生根后定植亦能成活生长，经断顶获得的穗条扦插亦获得了成功。此外扦插苗继代培养成活率较实生苗继代培养扦插成活率低，二者扦插成活率分别为54．2％和80．6％。     

思茅松不同无性繁殖试验初报

通过高枝压接继代培养和扦插苗继代培养等方式对思茅松（Pinus kesiya var.langbianensis）进行了无性繁殖试验,结果表明：对不同母树年龄的思茅松枝条进行高枝压接均能生根,而且生根后定植亦能成活生长,经断顶获得的穗条扦插亦获得了成功。此外扦插苗继代培养成活率较实生苗继代培养扦插成活率低,二者扦插成活率分别为54．2％和80．6％。     

森林采伐限额检查抽样技术探讨

无证采伐总量=采伐总量-有证采伐总量。有证采伐量的调查,其标志值为单位发证采伐量的实际采伐蓄积,以自然村为一阶单元进行总体平均数的不等群抽样估计。在设置样地对采伐总量调查时,其标志值应为单位面积的实际采伐量,可用总体平均数的双重分层抽样法估计,其分层因子为地貌和林木地。     

榛子无性繁殖技术研究的现状与趋势

榛子是一种无性繁殖相对困难的树种,目前主要采用压条法进行繁殖,繁殖系数低,这限制了榛子苗的大量生产.为了加快榛子苗木繁殖的速度,综述了有关榛子压条、扦插、嫁接和组织培养等方面研究的现状与趋势,分析了相关研究中存在的问题,并指出了其发展方向.认为如何有效地提高榛子的繁殖系数,是榛子繁殖亟待解决的问题;繁殖速度快的扦插、组织培养等繁殖方法将成为解决榛子繁殖难题的有效途径.