共查询到20条相似文献，搜索用时 640 毫秒
1.
QinGuanghua JiangYuezhong B.Nottola 《中国林学(英文版)》2003,5(3):21-27
18 clones of Populus deltoides and P. x euramericana were introduced from Italy, Turkey and domestic in 1986 and 1987 with the agreement of FAO. A completely random block design was applied and the seedling test and controlled afforestation trials had been held at Jinan City, Gaotang County and Juxian County, Shandong Province respectively. The results showed that two clones, namely S307-26 (P. deltoides cv.‘S307-26‘) and PE-19-66 (P. deltoides cv.‘PE-19-66’) performed well both in terms of adaptability and growth characteristics. The mean growth volumes (V) of single tree of S307-26 and PE-19-66 were 0.181 2 m3 and 0.164 9 m^3, which were 42.0 % and 29.2 % larger than that of I-69 (P. deltoides cv.‘Lux‘ 1-69/55 ) (CK), respectively, at the age of 5years at three experimental sites. Results of variance analyses and T test (LSD) for variables showed that above mentioned two clones were significantly different with 1-69 (CK). Further analyses found that both clones could be propagated easily and showed high resistance to poplar diseases, pests, drought, cold as well as strong wind, and had long growing period. Furthermore, mechanical properties were also better and fiber length was longer than that of 1-69 (CK). It was concluded that both S307-26 and PE-19-66 were ideal varieties for the establishment of fast growing poplar plantations, especially of the wood pulp forest plantations in the region. 相似文献
2.
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
3.
In order to discover which ectomycorrhizal-(ECM) fungi have better growth-promoting effects on poplars, cuttings from four
poplar species were inoculated with nine species of ECM fungi by three methods. We investigated the status of mycorrhizal
formation and the effects of these fungi on the growth of the poplars. The results show that Xrocomus chrysentero (Xc), Boletus edulis (Be), Pisolithus tinctorius (Pt) and Laccaria amethystea (La) formed clear ectomycorrhizal symbiosis with the poplar seedlings. Among these four ECM fungi, Xc had the greatest ability
to develop mycorrhizae with all four poplar species. Be shows a greater ability to form mycorrhizae with Populus deltoides Bartr cv. ‘Lux’ (Poplar I-69). Pt and La had relatively weaker abilities of colonization. The other five ECM fungal species,
i.e., Scleroderma luteus (Sl), Leccinum scabrum (Ls), Boletus speciosus (Bs), Calvatia craniiformis (Cc) and Rhizopogen luteous (Rl) could not easily form mycorrhizae with poplar seedlings grown in sterilized substrates, but could do so in non-sterilized
soil. With the method of drilling and injecting liquid inoculum, a simple operation, the mycorrhizal infection rates were
higher than with the other two methods, applying solid inoculum as fertilizer at the bottom of the pots and dipping roots
in the inoculum slurry. P. simonii Carr. formed mycorrhizae with most of the nine ECM fungi. P. x euramericana (Dode) Guinier cv. ’san Martino’ (Poplar I-72) and P. deltoids Harvard x P. deltoids Lux (Poplar NL-351) had the highest compatibility with Pt. Poplar I-69 shows the highest compatibility with Xc. The study
indicates that the optimal ECM fungi for poplars I-69, I-72 and NL-351 were Be, Xc and Pt, respectively. The optimal fungi
for P. simonii Carr. were Xc and Be. These ECM fungi promoted the growth of the poplar seedlings significantly.
__________
Translated from Journal of Nanjing Forestry University (Natural Sciences Edition), 2007, 31(6): 29–33 [译自: 南京林业大学学报(自然科学版)] 相似文献
4.
5.
Yankui Wei Liming Jia Ling Wang Guoqing Qiu Changshan Xing 《Frontiers of Forestry in China》2008,3(1):98-105
The characteristics of root growth in the fast-growing and high-yield plantation of poplar I-214 (Populus × euramericana cv. ‘I-214’) were studied under two contrasting conditions, subsurface drip-irrigation (SDI) and normal irrigation (CK),
on the sandy soil of Chaobai River, Beijing. The results showed that in the soil layer of 20–50 cm, there was a considerable
increase in the amount of roots less than 10 mm in diameter (especially those of less than 2mm) under SDI, which was three
times as much as that under CK. The absorbing roots under SDI were concentrated in the soil layer of 20–50 cm, while the roots
under CK were distributed evenly in each layer. With respect to horizontal distribution, roots (d<10 mm) under SDI were distributed mainly near the subsurface emitters and the amount of roots in 3 m in a row under SDI were
50% less than under CK. Therefore, it is suggested that subsurface emitters with the shape of “#” should be collocated in
the middle of two rows and two individual trees to increase the distributing and absorbing range of roots under SDI, and further
increase the plantation productivity.
__________
Translated from Journal of Beijing Forestry University, 2007, 29(2): 34–40 [译自: 北京林业大学学报] 相似文献
6.
7.
8.
Chang-Hua Fang Daniel Guibal Bruno Clair Joseph Gril Ya-Mei Liu Sheng-Quan Liu 《Annals of Forest Science》2008,65(3):307-307
Six inclined poplar I-69 (Populus deltoids cv. I-69/55) trees were collected for studying the influence of growth stress level on wood properties. Growth stress indicator (GSI) was measured at eight positions around the periphery of each trunk at breast height and corresponding wood samples were obtained. Wood anatomical, physico-mechanical and chemical characteristics were measured, including cell diameter, fibre length, double wall thickness excluding the gelatinous layer, lumen diameter after gelatinous layer removal, proportion of wood tissues, basic density, FSP, MOE, compressive strength, shrinkage and chemical composition. Each property was regarded and discussed in relation to the growth stress level. 相似文献
9.
山东省临沂地区杨树人工林林分密度管理图,于1986年冬至1987年春在该地区设置69杨等临时标地356块资料基础上编制而成。密度为278—5952株/ha(其中500—1894株/ha者占89.1％);优势高为5.9—28.6m;平均胸径为3.8—28.6cm;蓄积量为3.9—339.7m~3/ha。管理图编制方法:等树高线选用M~(-1)=A_1+B_1N~(-1)式,等直径线选用D~(-1)=A_2+B_2N式;最大密度线采用M_(Rf)=K_2·N_(Rf)~(K_1~′)式;密度管理线采用M_(Ry)=K_3·N_(Ry)~(K_1~′)式。本密度管理图的精度,等树高线为97.6％;等直径线为98.9％,符合生产要求。 相似文献
10.
在集约栽培的杨树人工林中进行小区灌溉试验,研究了不同供水处理下林木生长和水分生理指标的变化,分析了田间供水量、蒸腾耗水量和材积产量的关系。结果表明,林木蒸腾耗水量和材积年产量均随供水水平的高低而增减。5年生杨树人工林(林行距3×6 m)在5—10月的蒸腾耗水量约602.6—879.2mm,林木生长1m~3 材积需蒸腾消耗180.0—215.0 t水。作者还用多种模式分析了田间供水量与材积产量的相关关系,提出了估算杨树人工林需水量的方法和 Ⅰ-69杨人工林需水量表。 相似文献
11.
1982年以来在湖南省汉寿进行了I－69杨人工林生长规律与营养特性的定位研究,前三年（1982－1984年）结果表明,当地的气候、土壤生态因子适于I－69杨生长,胸径生长年、月变异极显著,第一年生长慢,8月为高峰期;第三年较高第二年次之,6月为高峰期,三年胸径年平均增长4．78cm。主要营养元素（除Mg外）的月变异极显著,与胸径生长规律一致,年变化夫显著差异,年平均含量较高,N为3．25％－3．31％,P2O5为0．58％－0．59％,K2O为1．59％－1．61％,CaO为3．17％－3．28％,MgO为0．54％－0．70％,反映了I－69杨生长与主要营养元素吸收,利用以及土壤养分的供给,处于动态平衡的良好状态。 相似文献
12.
据不完全统计,杨树人工林全国共有114.8万ha,为能进一步提高杨树经营管理水平,编制杨树二元立木材积表已成为当务之急。作者利用从1981年起经过5a时间测定与收集16个树种共6383株实测样木资料,编制了12个杨树二元立木材积表,供生产、科研工作应用。 相似文献
13.
14.
Forest plantations in the northeastern United States comprise a small proportion of the total forest area. Most plantations are typically softwood dominated and managed for sawlog and pulpwood production, while high-yield hardwood plantations for bioenergy feedstocks have not been as widely investigated. The objective of this study was to compare the biomass production of planted white spruce (Picea glauca (Moench) Voss) and hybrid poplar (Populus spp.) plantations (four clones) in monoculture, and in mixture of the two on a typical reforestation site in Maine. Three years following planting, hybrid poplar height and ground line diameter growth rates began to diverge among clones, and by 6?years, the Populus nigra?×?Populus maximowiczii (NM6) clone clearly outperformed three Populus deltoides?×?Populus nigra clones (D51, DN10 and DN70) both in pure stands and in mixtures with white spruce. In mixture, we found the yield of white spruce to decline as the yield of hybrid poplar increased. Overall, yields of white spruce monocultures were comparable to those reported in eastern Canada, while the hybrid poplar biomass yields were substantially lower than those reported from studies on abandoned agricultural lands, likely due to the harsher soil conditions at our site. The dominance of rocky and poorly drained sites (like the one tested in this study) across Maine will likely limit the feasibility of widespread hybrid poplar plantations, and thus constrains their potential use as a bioenergy feedstock. 相似文献
15.
Rainer Petzold Kai Schwärzel Karl-Heinz Feger 《European Journal of Forest Research》2011,130(5):695-706
The aim of this study was to investigate transpiration and its main driving factors on the example of a hybrid poplar plantation
with the clone Populus maximowiczii × P. nigra, cv. Max 1 on a site in the hilly loess region of Saxony (Germany). Transpiration was measured using sap flow techniques
during the 2007 and 2008 growing season. At the same time, throughfall, soil moisture dynamics and soil physical properties
were also measured. Total transpiration rates amounted to 486 mm and 463 mm, respectively, during the 2 years. Maximum daily
transpiration rates reached 6.7 mm/day, while an average of 2.2 mm/day for the entire growing season was recorded. The main
controlling factors for stand transpiration included the evaporative demand, water availability and soil temperature. The
information was implemented into a simple empirical model for the prediction of transpiration. It can be concluded that large-scale
establishment of poplar plantations will result in a distinct reduction in groundwater recharge. On the other hand, surface
run-off and soil erosion may decrease. Due to limited water availability in the late growing season, the growth potential
of the tested clone cannot fully be exploited at many sites in Germany. 相似文献
16.
Natural durability of two plantation woods, Chinese fir and I-214 poplar, was investigated thoroughly by three testing methods,
namely an accelerated laboratory decay test, a fungus cellar test and a field test. After the decay test using Postia placenta and Trametes versicolor, Chinese fir and the I-214 poplar showed 34% and 69% of mass loss, respectively, indicating they should be classified as
slightly durable and non-durable wood. This conclusion was confirmed by the fungus cellar test and the field test. Like the
performance in the decay test, I-214 poplar showed no resistance to termites either in the laboratory or in the field, whereas
Chinese fir would be classified as moderately resistant.
[Supported by Sino-Japanese Technical Cooperation Project Titled “Studies on Chinese Plantation Wood” (JICA PROJECT/033-1418-E-O)] 相似文献
17.
蒸腾速率是杨树水分状况最重要的水分生理指标,它携带着耗水的信息。由于杨树形体高大,测定工作十分困难。国外的大棚、蒸渗仪、树干液流、微气候等测定方法,花钱多,不易操作,难以推广。迄今为止,还数、Huber和Arland等改进的快速称重法(Quick-weighing method,以下简称快称法)简便易行,在苏联、中国及欧洲国家广泛应 相似文献
18.
Site productivity of the hybrid poplar clone Brooks6 was predicted using soil and site information from 6, 4-year-old plantations
in north-east Alberta. Predictions were made at both the local and microsite scales. Percent sand (R
2 = 0.352, P = 0.001) was the best single predictor of hybrid poplar productivity, showing a curved relationship. Soil pH also showed
a curved but weaker relationship with hybrid poplar productivity (R
2 = 0.133, P = 0.100). Maximum tree productivity occurred at sand contents between 55 and 70% and pH values near 6. Other variables, including
foliar nutrient concentrations, foliar δ13C, electrical conductivity, depth of the A horizon and total chemistry of the soil, were also related to hybrid poplar productivity
at the local and microsite scales. However, all of these variables were correlated to either soil texture (percent sand) or
pH. At the microsite scale within plantations, percent sand was the most important predictor of tree productivity and explained
more than 50% of the variability within plantations, although the relationship varied by plantation. In plantations with fine
textures, sandier microsites were associated with increased growth while in sandy plantations, finer textured microsites were
more productive. As a whole, the growth of the hybrid poplar clone Brooks6 appears to be mostly influenced by a combination
of soil water and nutrient availability, the former being impacted by soil texture and the latter being governed by soil pH. 相似文献
19.
美洲黑杨及其杂种在世界和我国杨树栽培中的地位与作用 总被引：2，自引：0，他引：2
本文介绍了美洲黑杨的天然分布, 生长状况。西欧各国对其珍贵基因资源的重视和利用, 我国引种美洲黑杨的现状及其作用等, 并对我国进一步利用美洲黑杨的基因资源, 促进我国杨树栽培的发展提出了一些看法。 相似文献
20.
A water soluble inhibitor of germination is present on the surfaces of freshly collected spores of Marssonina brunnea (Ell et Ev.) P. Magn. Spores of this pathogen have a high potential for germination even in the absence of external substrates. Among the poplar clones examined there was no correlation between spore germination on leaf discs and the disease reaction of the discs under controlled conditions. However under these conditions the disease development on leaf discs taken from clone I-69/55 was correlated with the high resistance of this clone to Marssonina leaf spot in the field. 相似文献