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1.
用产于加拿大9个种源的扭叶松种子育苗,在湖北恩施的建始县国有高岩子林场的十字坪、姚家坡进行了扭叶松不同种源地、不同种源的植苗造林试验。其幼树期的试验结果表明:扭叶松能适应两地的环境条件,植苗造林成活率及保存率达91.3%~100%;对14年生的试验林进行高、径生长分析,扭叶松的树高生长和胸径生长受种源、造林地点的影响极显著;种源与造林地点对树高生长的交互作用极显著。进一步对树高进行单点分析,参试的9个种源,在十字坪试点,10577、26230、25730、27084、28476、14726、26153七个种源的树高生长极显著高于25801、25803两个种源,且7个种源两两间差异不显著;姚家坡试点10577种源的树高生长极显著高于其他种源,其下依次是28476、26153、26730、27084、14726五个种源。胸径生长在种源间的极显著差异缘于10577种源与25803、25801种源间的差异,其他任意两种源间的胸径生长差异不显著。 相似文献
2.
Kamis Awang Perugupalli Venkateswarlu Abd.Shukor Nor Aini Goran Adjers Suree Bhumibhamon Bopit Kietvuttinon Fuh-Juinn Pan Kiatkong Pitpreecha Apisit Simsiri 《Forest Ecology and Management》1994,70(1-3):147-158
The performance of 25 provenances in international trials on seven sites in four countries was assessed for survival and growth at 3 years. Of these provenances, seven were from Queensland, 12 from Northern Territory, Australia, and six from Papua New Guinea. Significant growth differences were found: (a) among provenances at four sites, (b) among the sites, and (c) between provenance regions. The interaction between sites and provenances as well as between sites and provenance regions was also significant. The poorest growth was recorded in Kanchanaburi, Thailand, while the best growth was in Banjarbaru, Indonesia. Stability analyses of the provenance x site interaction revealed eight provenances with high vigour and good tree form that were relatively stable across sites. These included Archer River, South Coen, Coen River and Wenlock River provenances from Queensland; Noogoo Swamp and Mann River provenances from Northern Territory; and North Bensbach and Old Tonda Village provenances from Papua New Guinea. 相似文献
3.
利用9个生长较好的马尾松种源区域试验点测定材料,建立24个种源在不同纬度上9年生树高的Gaussian反应函数,发现3个反应函数参数(模式纬度、内稳定性参数和尺度参数)具有显著的地理变异模式。北部种源大多在其原产地以南3~6个纬度的区域内生长表现最佳,而南部种源的原产地大致也是其生长的最适地。一般来讲,南部种源较北部种源具有较高的内稳定性和遗传可塑性,适宜栽植的区域较广。根据优良种源在不同纬度上的生长优势,并考虑到气候等安全因素,为几个马尾松优良种源确定了适合的推广栽植范围。 相似文献
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全国杉木种源试验协作组 《林业科学研究》1988,(1):1-13
本文对杉木地理种源第一次试验21个试验点上19个种源的六年生幼林和第二次试验45个试验点上43个种源的三年生幼林的生长发育及适应性状进行分析,评定各种源的优劣以及与环境的互作。研究表明:种源间差异极显著,如六年生幼林材积的选择效果平均达20%,优劣种源间平均相差3.3倍。根据生长量、稳定性、开花结实和耐寒性等指标,综合评定选出南岭山地为我国杉木的优良种源区。同时,依据各造林区试验结果,初步确定能获得明显增产效益的优良种源,并提出了杉木种子的调拨意见,定出可作为我国杉木良种基地的最优种源区域。 相似文献
6.
A provenance trial of Michelia chapensis Dandy in the south of China was carried out in three sites to assess yield and stability analyses. The trials were conducted as randomized, complete block designs with four replications at each site. Additive main effects and multiplicative interaction (AMMI) and genotype main effect and genotype × environment interaction (GGE) were employed in the evaluation of provenances; AMMI analyses showed that significant genotype × environment interaction effects (P < 0.05) existed between provenances, capturing 15.11 % of the total sum of squares. The AMMI stability value revealed that provenance 2 was stable, but had low yield. GGE-biplot models showed that provenances 7, 8, 10, and 11 were more stable and high-yielding. The GGE results also confirmed that among the three sites, site JiuQuShui was the most ideal environment for representation and discrimination. 相似文献
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针对福建建瓯的7年生33个产地的木荷种源试验林,研究揭示其生长和木材基本密度的种源差异及地理变异模式,并依据聚类分析结果进行速生优质种源选择。结果表明,木荷胸径、树高、枝下高、材积指数和木材基本密度等存在显著或极显著的种源变异,其中以材积指数的种源变异最大。木荷生长和木材基本密度的种源变异主要受产地温度影响,呈典型的纬向变异模式,来自纬度较低、温度较高产地的木荷种源,其树高、胸径和材积指数等生长量较大,木材基本密度较小。木荷各性状间也存在相关性,其木材基本密度与生长性状呈显著负相关。除存在显著的种源效应外,不同重复间的微立地效应也非常显著,在较差立地条件下,木荷种源的生长量较小,但木材基本密度呈现增大趋势。基于生长和木材基本密度进行种源聚类,可大致将木荷划分为中心种源区、中部种源区和北部种源区3个种源区。同时,以高于材积指数和木材基本密度种源总体均值为选择标准,分别初选出17个速生型和11个速生优质型木荷优良种源,其中多数优良种源来源于南岭山脉—武夷山脉的中心种源区。 相似文献
9.
《Scandinavian Journal of Forest Research》2012,27(2):112-126
In three Nordic field trials, 26 provenances of Abies lasiocarpa (Hook.) Nutt. and Abies lasiocarpa var. arizonica (Merriam) Lemmon were evaluated 3 yrs after establishment. The focus was on 16 traits important for adaptation, establishment and production of Christmas trees. For all three sites in Denmark, Norway and Iceland, survival ranged from 89 to 96%. Provenances showed statistically significant differences for all but two traits. For all traits there was significant interaction between provenance and site. Analysis of ecovalens showed that for most traits, only a limited number of provenances contributed substantially to the interaction. Therefore, a large proportion of the provenances showed a fairly consistent ranking across sites. The frequency of potential Christmas trees in the provenances ranged from 10 to 49%. Southern provenances from New Mexico and Arizona seemed to have the best potential for producing high-quality Christmas trees. The southern provenances added substantially to the interaction between provenance and site for budset, lammas growth and colour. When using multivariate statistical methods on all measured traits, the provenance clusters fitted neatly into six distinct geographical regions. 相似文献
10.
《Scandinavian Journal of Forest Research》2012,27(1-4):275-287
Survival at a mean height of 2.5 m was studied in eight experimental series comprising provenances of Pinus sylvestris (L.). A ninth series of planting experiments was used for verifying functions predicting local provenance survival. The estimated survival of local provenances declined as the temperature sum decreased, with the decline being most rapid close to timberline. Variation in survival within the same climatic region was large, especially in moderately harsh areas. Southward transfer increased survival. Transfer effects differed depending on the temperature sum at the growth site; the greatest effects were found in moderately harsh areas. Altitudinal transfer effects were small and inconsistent. Local provenance survival differed between series. Local provenance survival varied depending on topography and humidity. Transfer effects did not vary between series, nor were they influenced by site factors. Prediction confidence limits were used to estimate the risk for failure of single reforestation attempts. 相似文献
11.
Enrique Andivia Felipe Carevic Manuel Fernández Reyes Alejano Javier Vázquez-Piqué Raúl Tapias 《New Forests》2012,43(5-6):815-824
Forest restoration programs using Holm oak (Quercus ilex ssp. ballota [Desf.] Samp.) have had limited success. The effect of plant provenance on plantation success is uncertain, although some previous studies suggest that some provenances may be better able to tolerate stress. We studied the tolerance to drought in seedlings from two Spanish provenances of Holm oak before and after outplanting. One provenance was from a continental climate with cold winters (GR) and the other was from a xeric climate (HU). Seedlings were subjected to a water stress test in the nursery during the summer and survival was visually assessed after 2?weeks. In addition, 35 healthy seedlings of each provenance that were not subjected to the water stress tests were used for outplanting experiment. In these plants the seasonal changes in water potential at dawn (Ψ), specific leaf area (SLA), cuticular transpiration (Ec), and loss of xylem hydraulic conductance of twigs (PLC) were measured over 18?months. After the water stress test in summer, mortality was 44.3?% for GR seedlings and 12.6?% for HU seedlings. In addition there were differences between the two provenances in plant water status after planting. The HU provenance had a better water status and was more water conservative in the summer (higher Ψ, lower Ec, lower PLC), but not in the winter. The different drought tolerance and water relations parameters of these two provenances indicate that provenance should be considered in forest restoration and conservation programs involving Holm oak. 相似文献
12.
Geographic variation in tree growth and wood density of <Emphasis Type="Italic">Guazuma crinita</Emphasis> Mart. in the Peruvian Amazon 总被引:1,自引:0,他引:1
Guazuma crinita Mart. is a fast-growing timber tree in the Peruvian Amazon. A trial of 11 Peruvian provenances was established in three planting
zones. Tree growth at 6, 12, 18 and 30 months and wood density at 32 months were analyzed across and within zones. Zones accounted
for more variation than provenances. Density varied significantly due to provenances in the analysis across zones, whereas
growth exhibited strong provenance by zone interactions. The local provenance grew well and produced relatively dense wood
in all zones. The relative magnitude of variation due to provenances depended on the planting zone. Density was greater in
the lower than in the upper stem. Density increased with longitude from the more humid to the drier part of the sample region.
In general, correlations indicated that larger trees had lower density and a larger difference in density between the lower
and upper stem, but the strength of these relationships depended on the provenance and zone. Results suggest that fast-growing
provenances can be selected at an early age without significantly reducing wood density. The local provenance is recommended
for reforestation pending future research demonstrating the superiority of foreign provenances. Some practical implications
for tree-improvement programs are discussed. 相似文献
13.
在镇沅、龙陵,瑞丽3个试验点,通过对15个种源99个旱冬瓜家系18个月的幼林的树高、胸径及材积的测定与分析,结果表明,(1)在旱冬瓜的地理种源间存在着丰富的遗传变异,不同种源幼林期在树高、胸径、材积生长上均存在着显著差异,表明在滇西南地区开展旱冬瓜优良种源的选择十分必要.(2)在3个试验点表现较好、较稳定的种源是瑞丽种源,材积的实际增益分别为,镇沅试验点34.2%、龙陵试验点40.2%、瑞丽试验点45.4%,瑞丽旱冬瓜种源可作为滇西南地区旱冬瓜人工造林的采种种源. 相似文献
14.
Autumn frost hardiness in Norway spruce plus tree progeny and trees of the local and transferred provenances in central Sweden 总被引:1,自引:0,他引:1
Reforestation with provenances from locations remote from the planting site (transferred provenances) or the progeny of trees of local provenances selected for superior form and vigor (plus trees) offer alternative means to increase yield over that obtained by the use of seed from unselected trees of the local provenance. Under Swedish conditions, Norway spruce (Picea abies (L.) Karst.) of certain transferred provenances generally has an advantage in productivity relative to the local provenance comparable to that of progeny of plus trees. The aim of this study was to explore the extent to which productivity gains achieved by provenance transfer or the use of plus tree progeny are associated with reductions in autumn frost hardiness, relative to that of trees of the local provenance. In a field trial with 19-year-old trees in central Sweden, bud hardiness was tested on four occasions during the autumn of 2002. Trees of the local provenance were compared with trees of a south Swedish provenance originating 3 degrees of latitude to the south, a Belarusian provenance and the progeny of plus trees of local origin. The Belarusian provenance was the least hardy and the local provenance the most hardy, with plus tree progeny and the south Swedish provenance being intermediate in hardiness. Both the Belarusian provenance and the plus tree progeny were significantly taller than trees of the other populations. Within provenances, tree height was negatively correlated with autumn frost hardiness. Among the plus tree progeny, however, no such correlation between tree height and autumn frost hardiness was found. It is concluded that although the gain in productivity achieved by provenance transfer from Belarus was comparable to that achieved by using the progeny of plus trees of the local provenance, the use of trees of the Belarus provenance involved an increased risk of autumn frost damage because of later hardening. 相似文献
15.
《林业研究》2016,(3)
A provenance trial of Michelia chapensis Dandy in the south of China was carried out in three sites to assess yield and stability analyses. The trials were conducted as randomized, complete block designs with four replications at each site. Additive main effects and multiplicative interaction(AMMI) and genotype main effect and genotype 9 environment interaction(GGE) were employed in the evaluation of provenances; AMMI analyses showed that significant genotype 9 environment interaction effects(P \ 0.05) existed between provenances, capturing 15.11 % of the total sum of squares. The AMMI stability value revealed that provenance 2 was stable, but had low yield. GGE-biplot models showed that provenances 7, 8, 10, and 11 were more stable and highyielding. The GGE results also confirmed that among the three sites, site Jiu Qu Shui was the most ideal environment for representation and discrimination. 相似文献
16.
This article reviews the silviculture of walnut in Britain andconsiders the case for planting common walnut (Juglans regia)or black walnut (Juglans nigra), neither of which is nativeto Britain. In addition the results of four provenance experimentsplanted in southern Britain in 198687 are described.The results of the experiments confirm that walnut is extremelysensitive to site conditions and should only be planted on themost suitable frost free, fertile, well drained and deeply rootablesites. Species comparisons show that J nigra is more tolerantof poor sites than J. regia, but at the only suitable site forplanting walnut there was little difference between the twospecies. Vermont, Ohio and Illinois provenances of J. nigraall performed well on the best site in the Chilterns and relativelywell on the other poorer sites. 相似文献
17.
Cyclocarya paliurus is a highly valued and multiple function tree species. There has been increasing interest in planting and managing C. paliurus for timber production and medical use owing to loss of harvestable acreage. Seed from six provenances was collected from the main natural range of this species. Significant variation in growth and wood properties was measured among the six provenances at age 7 years. Provenance mean height and DBH varied significantly from 730–991 and 6.7–10.0 cm, whereas provenance means of wood basic density and crystallinity ranged from 463–554 kg m?3 and 51.4–74.1 %, respectively. Mean provenance microfibril angle (MFA) at breast height ranged from 18.1° to 23.2°, while MFA at breast height varied from 11.0° to 34.5° among growth rings which showed a consistent pith-to-bark trend of declining angles. There was no significant relationship of growth rate with latitude or longitude of seed sources, however, provenances from low latitude and longitude grew faster at the trial site. Wood quality was significantly related to latitude of seed sources, showing a positive correlation for both wood basic density and wood crystallinity, but a highly negative association with MFA. Significant correlations between wood properties measured indicated that there exists a great opportunity to improve wood quality of C. paliurus through selection of juvenile trees with low MFA. 相似文献
18.
Early growth of
Calliandra calothyrsus
(Meissner) provenances in the acid soils of southern Cameroon
Provenance evaluation of Calliandra calothyrsus was conducted at Minkoameyos in Yaounde and Nkoemvone, in Ebolowa, southern
Cameroon. The aim was to assess early growth performance in provenances of the species in acid soils of the region. The soils
of Minkoameyos are regarded as moderately acid (pH 1:1 soil:water 5 to 6 and Al saturation < 20%) while that of Nkoemvone
is referred to as very acid (pH 1:1 soil:water < 5 and Al saturation > 40%). Germination potential of the seeds was assessed
at two weeks after planting. The growth performance was evaluated at three, six, nine and twelve months for height, diameter,
biomass, number of stems and phenological developments. In terms of all the parameters measured, significant (P < 0.05) difference
was detected between provenances. Effect of site or the interaction of site by provenance was significant for only some parameters
at certain periods. Variation in the over all growth performance between provenance was high and differences between sites
was minimal. This indicates that C. calothyrsus grow well both on very acid and moderately acid soils of southern Cameroon.
The large genetic variation in growth and biomass production suggest that further screening to isolate desirable traits for
genetic improvement effort is essential. In short-term, the current result will allow for immediate selection of superior
provenances with desirable traits for use in appropriate agroforestry systems in southern Cameroon.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
19.
Mercè Guàrdia Robert Savé Raquel Díaz Antoni Vilanova Neus Aletà 《Annals of Forest Science》2013,70(8):791-800