共查询到20条相似文献，搜索用时 93 毫秒
1.
激素,钙,水杨酸和铵诱导马尾松,黑松抗松材线虫病的研究 总被引：3，自引：0，他引：3
诱抗试验结果表明：（１）ＩＢＡ、乙烯、ＩＢＡ＋乙烯对马尾松的诱抗效果达６０％，而ＩＢＡ＋乙烯对黑松苗的诱抗效果为１２．５％。（２）Ｃａ＾２＋ＩＢＡ对黑松苗的诱抗效果为３６．６７％。（３）除Ｓａ＋ＩＢＡ对黑松苗的诱抗效果为１６．７％外，其余Ｓａ的各处理效果均不明显。（４）铵的单用、混用或与Ｃａ＾２＋混用对马尾松诱抗效果均可达６６．８％￣１００％。 相似文献
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神灯白掌组织培养快繁技术 总被引：2，自引：0，他引：2
以神灯白掌顶芽或茎段作为外植体,消毒后接种在培养基（１）：ＭＳ＋ＢＡ１０＋ＮＡＡ０１＋３％蔗糖,培养３０ｄ。将无菌材料转接在新配制的培养基（１）上,３０ｄ转接１次,如此反复继代,年繁殖系数达３６。生根培养采用培养基（２）：１／２ＭＳ＋ＩＢＡ０８＋１５％蔗糖＋００２％活性炭。瓶内平均发根率达９８％以上,温室内移栽平均成活率达９５％以上。 相似文献
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马尖相思离体培养再生植株的研究 总被引：4，自引：0，他引：4
用马尖相思（Ａｃａｃｉａ ｍ ａｎｇｉｕｍ ）１０ 年龄树芽器官为外植体,通过组织培养直接诱导不定芽产生,并获得根茎叶齐全的试管苗。剪取当年枝条的自顶芽往下依次带节的茎段培养,以第二、第三节茎段诱导芽萌动率高而快;芽诱导培养基为改良ＭＳ＋ ６－ＢＡ ２ ｍ ｇ／Ｌ＋ ＮＡＡ ０．５ ｍ ｇ／Ｌ,芽诱导率９０％ ;芽增殖培养基为改良ＭＳ＋ ６－ＢＡ ０．５ ｍ ｇ／Ｌ＋ ＮＡＡ ０．２５ ｍ ｇ／Ｌ＋ ＶＢ２ ５ ｍ ｇ／Ｌ＋ Ｖｃ ４ ｍ ｇ／Ｌ,芽增殖倍数４．８ 倍;生根培养基为１／２ ＭＳ＋ ＡＢＴ ２ ｍ ｇ／Ｌ＋ ＩＢＡ ０．２ ｍ ｇ／Ｌ＋Ａｃ ０．１％ ,生根率９７．０％ ;黄心土为试管苗最佳移栽基质,成活率达到８５％ 。 相似文献
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绿宝石蔓绿绒离体培养繁殖技术研究 总被引：2，自引：1，他引：1
绿宝石蔓绿绒离体培养繁殖技术研究结果表明：①冬春两季的茎尖、带芽茎段是理想的外植体材料；②外植体用７５％ 酒精消毒１５ ｓ，再用０１％ 升汞浸泡５ ｍ ｉｎ，可达到较好的消毒效果；③最佳分化增殖培养基ＭＳ＋ ＢＡ２ ｍ ｇ／Ｌ＋ ＮＡＡ０３ ｍ ｇ／Ｌ，可使增殖倍数达７５０；④最佳生根培养基濎濚ＭＳ＋ ＮＡＡ０５ｍ ｇ／Ｌ＋ ＩＡＡ０１ｍ ｇ／Ｌ＋ 蔗糖２０ｇ／Ｌ＋ 活性炭２ｇ／Ｌ，达到９６２％ 的瓶苗生根率；⑤组培苗按照最佳移栽程序，可获得９１２１％ 的移栽成活率。 相似文献
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以河北省易县毛白杨为试材，对其离体快速繁殖过程中的各阶段进行了较为系统的观察分析。结果表明： 幼树半木质化新梢中部单芽茎段为最佳外植体材料； 启动培养基以改良培养基 Ｂ５＋ ０２ ｍ ｇ／ Ｌ Ｎ Ａ Ａ为最好； 试管苗的叶片可与腋芽及茎尖同时作为继代培养的材料， 最佳分化培养基为 Ｍ Ｓ＋ ０２５ ｍ ｇ／ Ｌ Ｂ Ａ＋ ０２５ ｍ ｇ／ Ｌ Ｚｔ＋ ０２５ ｍ ｇ／ Ｌ Ｉ Ａ Ａ；最佳生根培养基为１／２ Ｍ Ｓ＋ ００２ ｍ ｇ／ Ｌ Ｎ Ａ Ａ＋ １０ ｍ ｇ／ Ｌ Ｖ Ｂ１＋１５％ 蔗糖， 生根率可达１００％ ， 生根数量为４ 条。 相似文献
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研究山杨高得率浆（ＣＴＭＰ、ＡＰＭＰ）废水在实验室用活性污泥法连续处理的净化效果。结果表明：（１）两种废水用活性污泥法处理可得到良好的净化效果。ＣＴＭＰ废水在全部水力停留时间（ＨＲＴ＝１０～５６ｈ）内,ＣＯＤ负荷量在２１８～１２９ｋｇ／ｍ３·ｄ时,ＣＯＤｃｒ、ＢＯＤ５去除率分别为６５９％～８１０％（平均７４６％）和９５５％～９８１％（平均９６８％）;ＡＰＭＰ废水在ＨＲＴ为１０～４６ｈ,ＣＯＤ负荷量为３４７～１６１２ｋｇ／ｍ３·ｄ时,ＣＯＤｃｒ、ＢＯＤ５去除率分别为８４０％～８５６％（平均８４９％）和９８０％～９８９０％（平均９８６％）;（２）在试验采用的全部水力停留时间内,通过处理产生的污泥的ＳＶＩ（污泥指数）均低于１５０ｍＬ／ｇ,污泥的沉降性能良好,在整个试验中,未发现污泥膨胀现象;（３）活性污泥法操作管理简单、方便,对废水的适应性强 相似文献
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对白刺离体培养进行研究的结果表明：腋芽分化最适培养基为ＭＳ＋ＢＡ２．０ｍｇ／Ｌ＋ＩＢＡ０．５ｍｇ／Ｌ,继代生根最适培养基为１／２ＭＳ＋ＩＢＡ０．６ｍｇ／Ｌ、生根率达１００％;２０日龄试管苗移栽成活率达９５％以上。 相似文献
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调查研究了马尾松、黑松、黄松的形态、解剖及叶绿素含量差异。发现黄松的针叶最长；针叶每厘米长鲜重及枝条顶芽色泽接近马尾松，针叶横断面长宽比接近黑松；针叶硬度介于两松之间。黄松针叶黄绿色，其叶绿素总量、叶绿素Ａ及Ｂ均明显低于马尾松或黑松。黄松针叶树脂道数超过马尾松或黑松，叶内２个维管束的排列方式，针叶树脂道中生性及气孔带数目均与黑松相似，针叶色泽与黑松×马尾松的人工杂种（日本的和华松）相似。由于上述特征，黄松为杂种的可能性是存在的。 相似文献
9.
盐胁迫对南方7个造林树种生理特性的影响 总被引：5，自引：0，他引：5
通过盆栽试验，作者对杉木、马尾松、银杏、火炬松、中山杉、侧柏和刺槐苗的耐盐能力进行了研究。盐处理水平为４种：ＣＫ（０．０％）、Ａ（０．１％）、Ｂ（０．３％）和Ｃ（０．５％）。测定的指标包括叶片中Ｋ＋、Ｎａ＋的累积量、游离脯氨酸（Ｐｒｏ）和叶绿素含量、超氧歧化酶（ＳＯＤ）活性、水势、存活率。研究结果表明：①随着盐浓度的提高和处理时间的延长，各树种叶片中Ｎａ＋浓度明显上升，但Ｋ＋浓度变化不大。②随着盐浓度的提高和时间的推移，各树种叶片中脯氨酸（Ｐｒｏ）含量均呈上升趋势，而叶绿素含量呈下降趋势。③随着盐分浓度提高及时间的延长，各树种的水势绝对值均呈上升趋势，而ＳＯＤ活性则降低。④盐浓度高低和作用时间长短对７个树种的生长有显著影响。⑤综合评定结果表明，刺槐和银杏抗盐能力较强，侧柏和中山杉抗盐能力中等，杉木、火炬松和马尾松抗盐能力较差。 相似文献
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１９９８年４月至１９９９年３月对广州市白云山马尾松林和常绿阔叶林、广州市龙眼洞马尾松林两试验点进行了酸雨的监测,并测定和分析了林内穿透雨物理量及化学量,旨在探讨酸雨对不同森林冠层养分淋溶规律的影响。结果表明：（１）广州市酸雨占次数的７９．７％或占降雨量的９５．１％。（２）酸雨通过林冠层后,ｐＨ值明显增加。（３）在马尾松林和常绿阔叶林中,某些单次降雨出现ＳＯ４＾２－、ＮＯ３＾－、ＮＨ４＾＋Ａｌ＾３＋、Ｎａ＾＋的负淋溶现象,说明森林对这些离子（特别是ＮＯ３＾－、Ａａ＾３＋）具有吸收作用;阔叶林全年的ＮＯ３＾－和Ａｌ＾３＋净淋溶为负值,说明阔叶林比马尾松林对这两种离子具有更强的吸收能力。（４）雨水酸度增加（即ｐＨ值减小）,明显提高阳离子Ｃａ＾２＋、Ｍｇ＾２＋、Ｋ＾＋和Ｎａ＾＋冠层淋溶面分率。（５）ＮＨ４＾＋、ＳＯ４＾ 相似文献
11.
Leonor Calvo Celia García-Domínguez Agustín Naranjo José R. Arévalo 《European Journal of Forest Research》2013,132(5-6):909-917
Knowledge of the germination characteristics of Pinus species can help in the understanding, prediction and management of the regeneration of pine forests. In the Canary Islands, several exotic pines (Pinus halepensis L. and Pinus pinea L.) were planted with Pinus canariensis Chr. Sm. Ex DC, the only native pine species, and there is now an interest in controlling these exotic species to restore the original forest. The main objective of the present study is to determine the germination response of P. canariensis, P. halepensis and P. pinea to different light regimes (darkness and light/darkness), thermal shocks and the presence of inhibitory substances from the leaves and litter of P. canariensis. P. halepensis seeds showed the highest viability and germination rate. Darkness accelerated P. halepensis germination, while exudates accelerated P. canariensis germination. Only treatments of 200 °C for 5 min and 300 °C for 5 min significantly decreased the germination of all three pine species. In the absence of strong differences in germination among species after treatments, the key for fire management or prescribed burning in this case may be the sprouting ability of P. canariensis. A possible management strategy to control the two obligate seeder exotic species could be to use one intense prescribed fire followed by a low-intensity prescribed fire after seed bank germination in the field, so in this way, only P. canariensis could resprout after fire and it would eliminate only the exotic pines in a mixed stand. 相似文献
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M. S. Günthardt-Goerg 《Forest Pathology》1986,16(7):400-408
Epicuticular wax composition and its variation with needle age was analysed chemically. Needles were taken from conifers at the highest altitude of their local distribution. Quantitative and qualitative differences in the composition of the three conifer waxes were found. Increasing needle age influenced the wax composition in Pinus cembra and Picea abies. 相似文献
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Parameter prediction models for the diameter distribution ofPinus sylvestris L., Pinus nigra Arn. and Pinus halepensis Mill.in Catalonia were developed using the truncated Weibull functionas the theoretical distribution. The parameter models allowone to use individual-tree models in the simulation of standdevelopment when only stand-level data are collected in forestinventories. Parameter models for the diameter distributionof stand basal area were developed. The data consisted of permanentsample plots from the Spanish National Forest Inventory in Catalonia.A total of 1780 empirical distributions of P. sylvestris, 1204distributions of P. nigra and 1535 distributions of P. halepensiswere used as modelling data. The empirical data represent left-truncateddistributions, as the smallest diameter measured in the fieldwas 7.5 cm. Two different approaches, namely, regression (two-stepmethod) and optimization approach (one-step method), were usedto find the coefficients of the parameter models. In the two-stepmodelling method, the Weibull parameters were first estimatedseparately for every empirical distribution by maximizing thelog-likelihood function of the Weibull density function. Inthe second-step, regression analysis was used to find the relationshipbetween Weibull parameters and stand basal area, number of treesper hectare and elevation of the site. The one-step method usedoptimization to find such coefficients for the parameter models,which minimized the mean of the squared differences betweenempirical and predicted cumulative tree frequencies in the wholemodelling data. The one-step optimization method performed betterthan the two-step regression method for all tree species. Theparameter prediction models developed in this study enable theprediction of the diameter distribution of P. sylvestris, P.nigra and P. halepensis in Catalonia from limited stand information. 相似文献
17.
湿地松、火炬松适应性分析 总被引：1，自引：0，他引：1
在同样的立地条件和抚育条件下,在1~20 a内,湿地松的生长明显优于火炬松和马尾松。20~30 a内,国外松生长不如马尾松,而且对地力的适应性也不如马尾松。作为短轮伐期的速生丰产纸浆林,湿地松是适应性比较强的速生丰产的引进树种,但在立地差、集约度低或海拔高处应以本地树种马尾松为主。 相似文献
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帕里松(Pinus quadrifolia)和灰松(Pinus sabiniana)分别原产于美国加利福尼亚和下加利福尼亚北部以及内华达山脉的半干旱地区,常常形成松栎混交林,林分垂直结构层次明显,植物种类较为丰富;具有水土保持、水源涵养、环境保护、野生动物保护等功能,而且可以提供良好的木材及林产品.积极引进优良外来树种,驯化利用丰富的乡土树种是加速林业生产和国土绿化的重要途径之一.良种壮苗的丰产栽培技术是造林成败的关键环节,本文详细阐述了从美国引进的优良帕里松、灰松种源栽植造林地选择、整地方法、造林密度、栽植方法、混交造林、抚育管理以及病虫鼠兔害防治等系列造林技术.而且选择当地乡土树种油松、侧柏、白皮松和叉枝圆柏等作对比试验. 相似文献
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P. Hansson 《Forest Pathology》1998,28(1):21-32
In a randomized block factorial experiment, 1200 seedlings from four provenances, each of Pinus sylvestris, Pinus contorta and Picea abies were inoculated with conidia (2 × 104 and 1 × 106 conidia/seedling) of Gremmeniella abietina (Brunchorstia pinea), isolated from P. contorta plantations in northern Sweden. A further 600 seedlings were left as controls. The occurrence of symptoms and the extension of dead tissues on the annual shoots were recorded 13 months after inoculation. Only the higher spore dose resulted in significant infection. P. sylvestris and P. contorta seedlings were equally susceptible (53% infected), and significantly more infected than P. abies seedlings (39%). The annual shoots of P. sylvestris and P. abies were affected to 43% and 37% of their length, which was significantly more than 15% of the length of P. Contorta shoots. The frequency of affected seedlings differed between the most southern and northern provenances of P. sylvestris and P. abies, and between the northwestern and the south-eastern provenance of P. contorta Twenty-six months after inoculation, a higher proportion of P. contorta seedlings than P. sylvestris and P. abies seedlings had recovered, and a lower proportion of P. contorta than P. sylvestris and P. abies seedlings had died. This paper discusses why P. sylvestris was found to be more susceptible to G. abietina than P. contorta in this experiment, while the reverse is found in plantations in northern Sweden. 相似文献
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《Scandinavian Journal of Forest Research》2012,27(1-4):46-51
Two‐ to three‐week‐old seedlings of Picea abies, Pinus sylvestris and Pinus contorta were inoculated with the supervirulent strain Agrobacterium rhizogenes R1600 2cm above the base of the hypocotyl; other treatments included inoculation with Agrobacterium tumefaciens strain A281 (pTVK291) or mock inoculation. Hairy or highly branched roots formed on 2–3% of seedlings of all 3 species that were infected by R1600 but on none of the other seedlings. Normal adventitious roots were also induced on 5–10% of Agrobacterium‐treated seedlings but none appeared on the other seedlings. Opine assays and growth rates of hairy and normal roots indicated that only roots with the hairy morphology were transformed. 相似文献