思茅松扦插苗与实生苗造林效果比较研究

依据相同立地条件下同龄人工林样地调查数据,分析比较思茅松扦插苗与实生苗造林效果的差异。结果表明:1)实生苗造林保存率比扦插苗高,但两者均高于90%;2)扦插苗的树高、地径生长量比实生苗大;3)扦插苗及实生苗高生长和径生长之间存在极显著的正相关关系,扦插苗表现出“高胖”的形态特征,而实生苗倾向于“矮胖”。     

交趾黄檀不同家系扦插苗造林成效比较

于2017—2019年在福建省龙海林下国有林场翻钟工区开展交趾黄檀19个家系的扦插苗造林比较试验,分析早期生长性状。结果表明:造林1.5 a时,扦插苗试验林平均造林保存率为98.83%,实生苗(对照)保存率为95.57%;家系扦插苗平均地径3.89 cm、平均树高2.62 m,不同家系扦插苗在地径、树高间都存在极显著差异(P0.01)。家系扦插苗早期生长性状具有较高的遗传力,变化幅度在77.03%～89.40%,具有改良的潜力;与实生苗相比,地径、树高遗传增益明显,变化幅度分别达到33.86%～93.57%、62.51%～129.5%。对地径、树高进行隶属函数法综合分析,初步选择出生长表现较好的3个家系(2、13、15号)扦插苗,可以逐步在造林应用中推广。     

云南红豆杉实生与扦插人工幼林生长量的比较研究

通过对云南省马关县金城林场云南红豆杉实生苗和扦插苗营造的4年生幼林的生长量进行对比分析,结果表明:实生苗造林幼树的树高、地径、生物量干重指标都大于扦插苗造林的幼树,且表现出明显的生长优势;实生苗造林幼树的地径变异系数是扦插苗造林幼树地径变异系数的1.1倍;扦插苗造林幼树树高变异系数是实生苗造林幼树树高变异系数的2.8倍。     

思茅松良种扦插苗造林初期生长效果

用已认定的思茅松良种(景谷思茅松无性系种子园种子)建立采穗圃生产的扦插苗,开展不同密度(2 m×2 m、2.5 m×3 m、3 m×4 m)及不同种类苗木(思茅松良种实生苗、思茅松良种扦插苗、卡西亚松扦插苗、湿加松扦插苗、湿加松实生苗)的造林对比试验。对造林后第4年的测量数据进行比较,在不同种类苗木试验中,思茅松良种扦插苗与其它种类苗木的树高在0.01水平上存在极显著差异,比卡西亚松扦插苗、湿加松扦插苗、湿加松实生苗、思茅松良种实生苗树高分别高出39.5%、24.7%、46.5%、30.1%;思茅松良种扦插苗与湿加松扦插苗的胸径在0.05水平上存在显著差异,比卡西亚松扦插苗、湿加松扦插苗、湿加松实生苗、思茅松良种实生苗高出8%、-15.3%、6.4%、-9.1%;在用思茅松良种扦插苗定植的密度试验中,树高差异不显著,密度2.5 m×3 m和2 m×2 m、3 m×4 m的胸径在0.05水平上存在显著差异,密度2.5m×3 m比密度2 m×2 m、3 m×4 m的胸径分别高出10.5%、29.2%,3个密度处理的平均树高和胸径可达到327 cm和56mm。由此可见,思茅松良种扦插苗造林效果显著高于其它苗木,造林密度以2.5 m×3 m为好。     

4a苗龄交趾黄檀扦插苗造林成效分析

开展交趾黄檀不同家系扦插苗造林试验,结果表明,4 a苗龄交趾黄檀家系扦插苗平均造林保存率较高,为94.37%,大部分参试家系扦插苗适应性较强,比实生苗生长更快;不同家系扦插苗树高、胸径、冠幅处理间存在极显著差异,地径存在显著性差异;树高重复力最高,地径重复力最低。通过综合评价,选择出了遗传稳定性最优的2号、13号家系。     

黎蒴扦插苗与实生苗造林对比试验初报

比较黎蒴扦插苗与实生苗苗期和造林后7个月及31个月的生长情况,发现黎蒴扦插苗多个性状优于实生苗;造林初期,实生苗生长较快,生长明显优于扦插苗,扦插苗蹲苗期较长,但后期扦插苗生长可以超过实生苗。从目前情况来看,黎蒴扦插苗造林值得推广。     

不同层次的红锥优异种质造林

通过对红锥(Castanopsis hystrix)扦插苗、表型优良单株采种培育实生苗及优良种源种子培育实生苗的不同层次红锥优异种质进行造林试验,结果表明:3种不同层次红锥优异种质造林效果差异显著,扦插苗极显著优于表型优良单株采种培育实生苗和优良种源采种培育实生苗,扦插苗造林成活率和保存率明显优于实生苗;平均树高提高62.90%和121.26%;平均胸径提高30.81%和56.43%;表型优良单株采种培育的实生苗优于优良种源种子培育的实生苗,平均树高和平均胸径分别提高35.83%和19.59%。充分利用不同层次的红锥优异种质,可大大缩短红锥育种周期。     

沙棘园营造技术

本文通过选择野生大苗,按株行距2m×4m 雌雄比8:2营造水地沙棘园。在集约栽培条件下,定植3a 后,保存率可达94%以上,树高、地径、当年生侧枝的年均生长量逐年增加,同时冠幅迅速扩展。山地沙棘园的营造,造林成活率由高到低依次为一年生实生苗,2年生实生苗和扦插苗;苗高和地径的生长量在造林当年差异不显著。     

海南石梓扦插育苗试验

<正> 海南石梓(Gmelina hainanensis Oliv.)为我国海南岛特产树种。1978年引来我县栽培,4年生时树高达5.9米,胸径12.5厘米。我们营造了一片实生苗和扦插苗对比试验林,据观察,扦插苗造林比实生苗造林生长快,干形好。为进一步提高海南石梓扦插成活率,我们于1982年春进行了扦插育苗试验,现将试验结     

南方红豆杉实生苗和扦插苗定植后幼树生长量比较

对南方红豆杉实生苗、顶枝扦插苗和侧枝扦插苗定植3.5年后幼树的生长量(树高、地径和侧枝发枝数)进行观测与分析。结果表明:定植3.5年后幼树的树高、地径和侧枝发枝数在3个处理间均存在极显著差异。树高表现较好的处理是侧枝扦插苗,其次是实生苗,较差的是顶枝扦插苗;地径和侧枝发枝数生长表现较好的均是实生苗,其次是顶枝扦插苗,较差的是侧枝扦插苗。     

高脂马尾松实生苗与扦插苗的早期生长比较

对2～5年生马尾松实生苗、扦插苗2种苗木进行造林对比试验,试验结果显示,这2种苗木造林的保存率都超过95%。扦插苗和实生苗2年生时5个测量性状（树高、胸径、冠幅、活枝轮盘数、侧枝总数）均差异不显著;3年生时树高、胸径差异显著,其它不显著;4年生时5个性状差异均显著。即从3年生开始扦插苗早期生长量才显著高于实生苗。说明扦插林早期较实生林速生。在种子短缺的情况下,利用优良的无性系繁殖苗木,是十分有效的。     

窄冠刺槐无性系根段扦插育苗研究

刺槐(Robinia pseudoacacia L.)因其木质坚硬,色泽纹理美观,耐磨耐腐蚀,抗弯抗压及抗剪强度高,是制造地板、家具等产品的优质木材[1]。我国从20世纪70年代开始对刺槐进行遗传改良,先后在次生种源选择、优良无性系选育等方面做了大量研究[2-5],选育出了一大批生长表现良好的优良无性系[6-7],特别是于2002年在河南省选育的窄冠刺槐优良无性系,生长快,主干通直圆满,分枝角度小,托     

木荷裸根苗和容器苗造林效果对比分析

采用一年生木荷容器苗和裸根苗在不同造林地类型上造林,比较造林效果。结果表明:木荷容器苗造林成活率和保存率在不同的造林地类型中均明显优于裸根苗。木荷容器苗造林树高生长和地径在不同的造林地类型中均明显优于裸根苗,并且差异显著。不同的造林地类型中,采伐迹地的成活率、保存率、树高生长量和地径生长量最好,其次为林冠下,再次为生物防火带。     

文冠果育苗栽植技术

本文主要对文冠果的播种育苗的种子分级、混沙埋藏催芽,温水浸种催芽,育苗地选择与整理作床,播种育苗,苗期管理,插根育苗技术以及文冠果栽植技术的选地与整地,栽植时间,栽植方法,幼林抚育管理等技术进行了介绍,以适应文冠果发展。     

Influences of seedling size,container type and mammal browsing on the establishment of <Emphasis Type="Italic">Eucalyptus globulus</Emphasis> in plantation forestry

Rapid early growth of tree seedlings is critical to the success of plantation establishment. We investigated the effects of seedling size (small and large) and container types (small [Lannen 121], medium [Lannen 81] and large [Forestry Tube]) in the nursery and the effects of mammal browsing after planting on growth of Eucalyptus globulus in Tasmania’s Southern Forests. After planting, seedlings were either exposed to browsing or protected from browsing by wire-mesh cages until age 6 months. Low browsing pressure resulted in around 20% and 5–10% of foliage being browsed in the large and small size categories, respectively, between 1 and 3 months after planting the uncaged treatment. 6 months after planting, height growth increment was lower, and 4 years after planting, mortality was higher in uncaged large than caged large seedling treatments. Six and twelve months after planting, seedlings raised in Forestry Tube containers had significantly greater height increment and root collar diameter relative to other treatments. By 4 years after planting, trees of the small seedling treatment had significantly greater diameter than those of the large seedling treatment, but there was no effect of container type treatment. Four years after planting there was no effect on diameter growth by browsing of <30% of foliage up to 3 months after planting, although there was greater incidence of double leaders in trees that had been browsed as seedlings. Small seedlings produced more growth 4 years after planting than large seedlings of E. globulus.     

3个中国沙棘优良品种扦插技术研究

针对辽西地区沙棘资源发展现状,以3个中国沙棘优良类型中红果、中黄果、中无刺为研究材料,对其苗木繁育技术进行了深入系统的研究。结果表明,采用炉渣灰扦插基质、ABT生根粉1号、插穗长度10cm左右、扦插时间为6月21日左右,这种处理效果最佳,但从经济角度考虑,最宜采用鲜河沙作为基质。中国沙棘苗木繁育采用裸地沙盘全光喷雾嫩枝扦插快繁技术效果较好。沙棘硬枝扦插的成苗率受多种因素的制约,硬枝扦插时间为4月下旬至5月初,采用20cm长的插穗,2~3年生的插穗成苗率较高,生产中采用2年生的插穗。     

杨树露天嫩枝扦插育苗技术研究

杨树嫩枝扦插扩繁快,效果好,对一些珍贵杨树扩繁可行。扦插分4个阶段即自养阶段、生根阶段、缓苗阶段、生长阶段。每年最佳扦插时间为6月上旬至8月上旬。插穗带2~3片叶,叶面积100 cm2最佳。     

Micropropagation of adult birch trees: production and field performance

We compared the growth of trees produced by micropropagation from nodal stem sections or callus tissue of a 20-year-old silver birch (Betula pendula Roth) tree with that of seedlings; growth was monitored for 17 months in pots followed by six years in the field. Micropropagated trees from both nodal stem sections and callus tissue grew at a similar rate to seedling trees and no obvious mutant types were observed. However, micropropagated trees were more uniform in height and trunk girth than seedling trees and more than 80% flowered within three years of field planting, whereas only 39% of seedling trees flowered within this time. Micropropagated trees had less bark fissuring, a mature characteristic, than seedling trees.     

Study on Cultural Technologies and Salt-resistance of Nitraria sibirica in Coastal Areas with Serious Salt-affected Soil

In this research, five Nitraria sibirica provenances such as Dayilu were selected to do experiment of salt-resistance, combining fixed plots test with typical plot investigation, measuring survival rate and growth as main indicators. The experiments of main cultural technology were done on Nitraria sibirica in 4 types of site preparation, 3 types of planting, 3 designs for planting density. The Nitraria sibirica experiments for the effects of curbing salt and improving soil were done by testing soil nutrients, salt content, soil physical properties as focal points in typical site of 3-4 years woods. The experiment results showed that the Nitraria sibirica could survive well with soil salt content of 0.6%, and that survival rate declined distinctively as soil salt content exceeded 0.8%. However, high soil salt content did not influence growth in the year of planting. There were obvious differences in salt-tolerance among Nitraria sibirica provenances; Dayilu was the best on salt-tolerance, the other 4 pro     

不同类型和规格木荷苗木造林对比试验

利用福建省南平樟湖国有林场不同类型和规格的木荷苗木造林对比试验林,系统研究苗木类型与规格对造林成活率、保存率、幼林生长及叉干率的影响。结果表明:轻基质营养袋苗、大田裸根Ⅰ级苗和大田裸根Ⅱ级苗3种类型和规格的木荷苗木造林成效差异显著,其中采用轻基质营养袋苗造林可取得95.56%的造林保存率,且叉干率只有3.47%;造林后木荷1年生幼苗地径、树高和冠幅的平均值分别达到了1.63cm、107.10cm和56.43cm;造林后2年生,其地径、树高和冠幅的平均值分别达到了2.61cm、224.90cm和113.07cm,均优于大田裸根Ⅱ级苗和大田裸根Ⅰ级苗的造林成效,说明采用木荷轻基质营养袋苗造林可显著提高造林成活率和生长量,降低林木叉干率,全面提升造林成效。