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35杨等杨树无性系在安徽长江滩地的引种试验 总被引:2,自引:0,他引:2
在安徽长江滩地引种黑杨派3个无性系,观测分析其苗期、林期生长、适应情况及主伐经济效益,选择出了造林、育苗成活率高,生长量大,虫害较轻的35杨为适合安徽长江滩地造林的优良无性系。 相似文献
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18个杨树品系湖区对比试验初报 总被引:2,自引:0,他引:2
全国各地的杨树良种在洞庭湖区蜂拥而至的情况下,选择6个南方型黑杨、7个北方型黑杨、3个三倍体毛白杨以及由湖南省林业科学院等单位培育的2个湘林美洲黑杨新无性系,在洞庭湖垸内进行不同杨树品系的对比试验。根据5年生杨树的生长量分析,初步显示湘林-77、湘林-90两个新无性系最具生长优势,可在湖区推广应用;南林-1388、南林-895、转抗杨、南林-351、鲁山杨(辽宁杨)、南林-95杨6个黑杨派南方型无性系可作一般性生产用种在湖区应用;欧美杨108等7个黑杨派北方型无性系、白杨派3个三倍体毛白杨无性系5年生的材积仅为南林-95杨的54.7%-12.9%,不宜在湖区推广应用。 相似文献
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引言在世界杨树人工林中,黑杨派的面积约占90%以上。从五十年代后期,我国陆续从国外引进许多黑杨派的无性系,如Ⅰ—214杨,沙兰杨、P-15A、I-69杨、I-72杨、I-63杨和I-45杨等,并巳成为我国华北、中原和南方平原地区的主要栽培品种。然而,多年实践证明,许多黑杨派无性系的造林成活率较低。据调查,河北省卢龙县1979年秋至1980年春,分别在16个地点栽植了5万株沙杨,平均成活率只有10.1%;南方型的黑杨派无性系,据孟昭和同志的资料,I-214杨的造林成活率为100%时,I-72杨为59.4%,I-69杨为 相似文献
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从意大利引进的欧美杨无性系74杨及美洲黑杨无性系35杨,4年生材积分别达到0.3031、0.3256立方米,超过对照72杨的16.4%和25%,并超过了它们在意大利的生长量,现已正常开花结实.同时,具有易扦插繁殖、造林成活率高、不感染严重病虫害的优良特性,可以在气候温暖的地区进一步开展无性系区域试验,以便为大规模推广提供科学依据. 相似文献
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在河滩地环境下,引种杨树8个无性系进行造林对比试验。结果表明:不同无性系的2年生林木的胸径、树高和材积生长均存在极显著差异;除了102/74无性系生长表现比对照(35/66)差外,其余的杨树无性系表现均好于对照。经评判,在滩地环境下的杨树生长适应性排序依次为A65/31>S371>T120>A65/27>A61/186>S7C3>35/66>102/74。 相似文献
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Marron N Dreyer E Boudouresque E Delay D Petit JM Delmotte FM Brignolas F 《Tree physiology》2003,23(18):1225-1235
Responses to successive drought and re-watering cycles (1-3 cycles) were compared in greenhouse-grown cuttings of Populus x canadensis (Moench) clones, 'Luisa_ Avanzo' and 'Dorskamp.' Total leaf number increment rate, duration of leaf expansion, total and individual leaf area expansion rates and stomatal conductance were recorded periodically during the experiment. Soil water content (SWC) and predawn leaf water potential (Psi(WP)) were measured four times during each drought cycle. In parallel, relative leaf water content (RWC) and specific leaf area (SLA) were estimated on leaves collected from the top to bottom of each cutting. Under well-watered conditions, 'Luisa_Avanzo' and 'Dorskamp' differed in their patterns of leaf area expansion. Although duration of leaf expansion was similar between clones, 'Luisa_ Avanzo' exhibited higher total leaf number increment rates and individual leaf area increases than 'Dorskamp.' As a result, 'Luisa_Avanzo' cuttings reached larger individual and total leaf areas than 'Dorskamp.' 'Dorskamp' leaves had lower SLA than 'Luisa_Avanzo' leaves. In response to successive drought cycles, both clones underwent decreases in total leaf number increment rates and in total leaf area expansion rates, but both whole-plant and individual leaf areas were drastically reduced only in 'Luisa_Avanzo.' 'Dorskamp' maintained a constant leaf area as a result of an increase in the duration of leaf expansion during drought and a significant stimulation of individual leaf area expansion rate and total leaf number increment rate in response to re-watering. Drought caused a greater decrease in SLA in 'Luisa_Avanzo' than in 'Dorskamp.' Expanded leaves of 'Dorskamp' were constitutively dense or thick, or both, whereas leaves of 'Luisa_Avanzo' became dense or thick, or both, only in response to drought. In both clones, re-watering caused partial recovery of SLA to control values. Our data confirm previous field and greenhouse observations that 'Dorskamp' is more tolerant to successive drought and re-watering cycles than 'Luisa_Avanzo.' We conclude that this difference is mainly attributable to the plasticity of 'Dorskamp' after re-watering, rather than to clonal differences in drought responses. 相似文献
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Qin Guanghua Jiang Yuezhong Qiao Yuling Shandong Academy of Forestry Jinan P.R.China 《中国林学(英文版)》2003,5(4)
1IntroductionAdversitystudyisoneofthefocusesinplantphysiology.However,thepriorityhadbeenputontheselectionofpoplarcloneswithfastgrowthrateandbetterwoodqualityonpoplarbreedinginthepastfewdecades.Therewerelimitedresearchestargetedontheresistancebreeding.Moreover,mostoftheresearchonadversityresistancewasconductedonPopulustomentosa(Peietal.1994,Duanetal.1998)andPopulusussuriensis(Jiangetal.1999).LittlewasknownabouttheadversityresistanceofpoplarclonesinSectionAigeiros(Wang1982,Zhu1990,Liuetal.1… 相似文献
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海滨湿地杨树、柳树新无性系苗期耐盐性研究 总被引:3,自引:0,他引:3
在海滨湿地分别4个盐度梯度,12种杨树、柳树新无性系田间扦插试验结果表明:在苗期,不同杨树、柳树无性系的成活率、保存率、生长量等均与土壤含盐量呈负相关;在出苗期的耐盐能力,1-74杨、1-69杨可达0.241%,35杨为0.188%,J30-16、J35-13、J4-34、J31-17柳为0.089%,其余5个柳树无性系均在0.060%以下;在苗木生长期,其耐盐极限分别为0.343%,0.333%和0.201%。 相似文献