共查询到20条相似文献，搜索用时 281 毫秒
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香脂冷杉是美国北部和加拿大一个非常重要的树种,它既是用材树种、生态树种,也是景观绿化树种。文章综述了香脂冷杉天然分布区的自然环境、繁育、生长及危害因子,以期为我国的引种栽培提供指导。 相似文献
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峨眉冷杉(Abies fabri)是我省特有的树种。峨边县是蛾眉冷杉主要分布地区之一。面积占四川峨眉冷杉总面积的37.8％,蓄积占20.2％。峨眉冷杉具有耐寒、耐湿、耐荫等特性,多属藓类箭竹冷杉林型。峨眉冷杉林以成熟,过成熟林为主,面积占该群系的87％,蓄积占94％,平均年龄120—180年,与其他冷杉林比较,其生长速度较快,成熟年龄早,结实周期较长,结实量小,给人工更新用种造成了一定困难。因此,建立母树林基地是加快峨眉冷杉更新速度,提高更新质量的重要措施之一。为此,笔者对川南林业局蛾眉冷杉母树林的生长情况进行了调查。 相似文献
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班克松引种总结 总被引：2，自引：0，他引：2
班克松原产北美洲北部 ,是美洲松中分布最广的树种 ,由于它耐寒冷、耐干旱、耐瘠薄、适应性强 ,木材又是良好的纸浆原料 ,世界上中、高纬度国家和地区都有引种。我国吉林、长春、辽宁、北京等地区也有引种 ,为了丰富胶东地区的树种资源 ,选择适生有价值的造林树种。在山东省林木种苗站的帮助下 ,于 1989年开始班克松引种试验研究工作 ,经过在垛山林场 11年的栽植试验 ,年平均高生长量 0 .31ｍ、胸径0 .5ｃｍ ,8年生前的生长量优于黑松 ,试验林的植株都已正常开花结实 ,并表现出抗旱、耐高温和耐瘠薄等特性 ,在海拔较高 ,立地比较瘠薄的山地… 相似文献
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Chen Hongji 《林业研究》1999,10(3):181-182
Different types of plantations were observed in Baishilazi National Nature Reserve, Liaoning Province, for 34 a. The environmental
quality ofAbies holophylla plantations was analyzed under different cutting systems. Analysis factors included soil erosion rate, humification degree
of litters, and water hold capacity. The surface soil loss of clear cutting area was 19000t·km−2·a−1 more than that of selective cutting area. The content of soil organic matter in board-leaved—Abies holophylla forest was 4.62% more than that in pure stand, and the water hold capacity of the mixed forest was 1.43 time of that of pure
stand. The mixed forest of board-leaved—Abies holophylla by selective cutting can upgrade the ecological environment quality.
This paper is a part of a key project from Liaoning Science Committee.
Responsible editor: Zhu Hong 相似文献
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Peguero-Pina JJ Sancho-Knapik D Cochard H Barredo G Villarroya D Gil-Pelegrín E 《Tree physiology》2011,31(10):1067-1075
Abies alba and Abies pinsapo are two closely related fir species that occur in the Iberian Peninsula under very different environmental conditions. Abies alba proliferates in the humid European mountains, including the Spanish Pyrenees. In contrast, A. pinsapo is a relict species that occurs in some restricted areas of the Mediterranean mountain ranges in Spain and Morocco, which experience intense summer drought periods. To cope with the high atmospheric evaporative demand during summer, A. pinsapo may either have a high resistance to xylem cavitation or develop a very efficient conducting system to reduce the soil-to-leaf water potential gradient. To investigate such hypotheses, we measured (i) the xylem vulnerability to cavitation for different populations, and (ii) several anatomical and hydraulic parameters indicating xylem sufficiency for -supplying water to the shoot in two contrasting populations of both species. Our results show that the resistance to cavitation was not different between species or populations. However, hydraulic conductivity (K(h)), specific hydraulic conductivity (K(s)), leaf-specific conductivity (LSC) and whole-shoot hydraulic conductance (K(shoot)) were higher in A. pinsapo, indicating a higher efficiency of water transport, which should contribute to maintaining its xylem tension below the threshold for rapidly increasing cavitation. The higher K(s) in A. pinsapo was largely a result of its wider tracheids, suggesting that this species may be much more vulnerable to freeze-thaw-induced cavitation than A. alba. This is consistent with the absence of A. pinsapo in northern mountain ranges with cooler winters. These physiological differences could partly explain the niche segregation and the geographical separation of these two firs. 相似文献
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《Scandinavian Journal of Forest Research》2012,27(8):653-663
Ten exotic Abies species were tested in two field trials, where the aim was to find suitable species and provenances for Christmas tree production in coastal and fjord areas in Norway. The material included 14 provenances of Abies nordmanniana, 3 provenances of Abies bornmuelleriana, 3 provenances of Abies koreana, 2 provenances of Abies amabilis, and 1 provenance each of Abies equi-trojani, Abies alba, Abies procera, Abies homolepis, Abies nephrolepis, and Abies forrestii. Field trials were established at Gulen in Sogn og Fjordane County and at Verdal in Nord-Trøndelag County. Christmas tree classification was done seven and eight growing seasons after establishment. The Christmas tree yield was higher in Gulen (64%) than in Verdal (45%), which is situated further north. Also, the survival and the height growth were higher in Gulen than in Verdal. A more humid climate and a longer growth season in Gulen may explain some of the differences. Of the 10 species, A. nordmanniana, A. homolepis, and A. bornmuelleriana produced the highest Christmas tree yield at Gulen, while A. homolepis and A. koreana had the highest yield at Verdal. Due to early bud burst, A. equi-trojani and A. bornmuelleriana are only suited for Christmas tree growing in the best climatic areas. 相似文献
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Photosynthesis, respiration, and transpiration were studied in different Abies alba provenances during and alter ozone exposure at three different levels (0/control, 125, and 250 ppb O3, respectively). The after-effects of ozone on frost resistance and growth rate were also analyzed. Pronounced reductions of photosynthesis and transpiration rates and an increased respiration were registered as a response to O3. Five months after exposure the winter frost resistance was significantly reduced, and growth depressions were registered during the following year. Differences in ozone sensibility and regeneration ability between provenances could be demonstrated. 相似文献
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辽宁省当前主要杨树优良新品种 总被引：2，自引：0，他引：2
近些年来 ,辽宁省杨树研究所在杨树良种选育研究中 ,通过杂交、引种等手段 ,相继培育出荷兰 3930杨、辽宁杨等 10余种更新换代优良品种 (无性系 ) ,在生产造林中广泛应用。文章着重介绍了这些良种的来源、形态、抗性、生长特性及适生推广区。主要优良品种 (无性系 )有 :①荷兰3930杨、3934杨 ;②辽宁杨、盖杨、辽河杨 ;③欧美杨 10 7、10 8;④ 92 0 5杨、92 0 7杨 ;⑤小×胡 2 3号、小×胡 19号杨 相似文献
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Difference in uprooting resistance among coniferous species planted in soils of volcanic origin 总被引：1，自引：0，他引：1
Akio Koizumi Naoki Oonuma Yoshihisa Sasaki Kunihide Takahashi 《Journal of Forest Research》2007,12(3):237-242
Uprooting resistance against wind force for coniferous plantations in soils of volcanic origin was studied. The difference
in uprooting resistance among Abies sachalinensis, Picea jezoensis, and Larix kaempferi was discussed. The sample site was set in Chitose plantations in Hokkaido Japan, where typhoon 0418 caused fatal uprooting
damage in 2004. An uproot resistance index—the ratio of the geometrical moment of area for uprooted root-plate to the moment
susceptibility to wind force—was defined to quantify relative uprooting resistance against wind force. It was calculated from
the dimensional measurements for the tree forms and root-plates of 100 uprooted sample trees after the typhoon attack. As
a result, the uprooting resistance for Picea jezoensis, which was less damaged among the sample species, was estimated to be greater than those for the other two species. 相似文献
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晋RS-1系核桃砧木的选育研究 总被引：2，自引：0，他引：2
根据观察研究发现,砧木对核桃树的寿命、生长、开花、结实以及适应性均有很大影响。因此,为了促进我国核桃产业发展,选育优良抗性砧木品种显得十分必要。经过9 a的反复调查试验,从山西省屯留县选育出的晋RS-1系核桃砧木,是我国第1个核桃砧木优系。笔者介绍了晋RS-1系母树的生物学特性,分析了其抗寒、抗病虫害能力以及子代繁殖力等方面的优势。结果表明：晋RS-1系砧木比中林1号、辽宁1号、鲁光等品种表现出耐寒、耐旱、病虫害少、繁殖能力强等特点,是一个非常理想的砧木优系,适宜在我国北方核桃产区大力推广。 相似文献