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在绿化施工中，经常因为特殊原因而不能在适宜的季节植树，致使其成活率很低。经过多年实践表明，做到快挖细扎，精心栽植，加强管理，即可打破季节的限制，提高非季节植树的成活率。 相似文献
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近年来城市园林绿化建设任务逐年增多,非适宜季节移植树木越来越普遍,根据非适宜季节树木移植所需要的关键技术,结合多年生产实践总结出突破植树季节的树木移植方法. 相似文献
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园林绿化施工也讲反季节种植 总被引：4，自引：0，他引：4
在很多重大市政建设工程的配套绿化工程中,出于特殊时限的需要,绿化要打破季节限制,克服不利条件,进行非正常季节施工。为了使工程质量达到优良,施工方需有效提高非 相似文献
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随着城市建设的快速发展,对城市建设中的园林绿化,也提出了新的要求。尤其是在目前城市建设工程的配套绿化工程中,出于特殊时限的需要,绿化要打破季节限制,克服不利条件,进行非正常季节施工。为了使工程质量提高,施工方在施工中需要有效提高非正常季节绿化施工的成活率,确保经济效益和社会效益。 相似文献
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指出了随着城市化进程的逐年加快,在城市园林景观建设过程中由于某些特殊原因需要在夏季甚至盛夏时节进行树木移植。非季节树木移植由于其能够快速成荫并形成景观的特点,近年来被多次应用于城市重点区段的园林景观营造。依据对实际案例调查和相关文献资料搜索,研究分析了新疆地区非适宜季节树木栽植在园林景观中的应用现状,得出了其在应用案例中体现出的优、劣势和特殊意义,探讨了影响非适宜季节树木移植成活的内部和外部因素,并结合案例阐述了非适宜季节树木移植的施工过程和工程实施要点。 相似文献
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赵婷 《内蒙古林业调查设计》2023,(4):44-45+95
在园林绿化中,移植季节对于树木成活率具有重要影响。随着我国园艺行业的快速进步和城市绿化建设的加速发展,为延长绿化工程周期,需要在非移植季节（每年5月中旬至9月中旬）进行园林绿化、植树造林。因此,反季节栽种移植樟子松的方式正逐渐成为一种发展趋势。文章以内蒙古清水河县北堡乡干旱山区为例,阐述了在非适宜季节里成功移植樟子松,提高成活率的技术。 相似文献
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阐述了大坳水库水源涵养林第一期工程建设情况.根据该地区的气候、地质状况,综合考虑生态、经济效益、景观效应,全面规划、整体推进、合理配置,选用优质苗木营造了一批高标准、高质量的水源涵养生态林. 相似文献
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Introduction
The mortality of nursery-grown beech (Fagus sylvatica L.) seedlings after out planting into the field is usually high. 相似文献13.
Acevedo Manuel Álvarez Carolina Cartes Eduardo Dumroese R. Kasten González Marta 《New Forests》2020,51(1):159-174
Ruil (Nothofagus alessandrii) is an endangered keystone species from the Mediterranean climate zone of Chile. Ruil’s fragile state of conservation urges development of restoration programs, but specific protocols for nursery production and field establishment that ensure plant survival are largely unknown. Therefore, we examined the effect on nitrogen (N) fertilization and container size during nursery production in combination with the use of mesh shelters after outplanting on survival and growth during the first growing season in the field. First year outplanting survival of nursery-grown container seedlings was enhanced when seedlings were given nitrogen (N) during nursery production and deployed with mesh tree shelters in the field. The volume of the container had no effect on outplanting survival and growth. Increasing N from zero to 200 mg N L?1 provided sufficient N levels, resulting in increased seedling height, root-collar diameter, shoot biomass, and total seedling N and phosphorous concentrations. Additional N provided by the 400 and 600 mg N L?1 treatments underwent luxury consumption by the seedlings with no further benefits in field performance. Improved growth in the nursery, along with the use of mesh tree shelters after outplanting, especially during the typical summer drought, may be responsible for increased survival during the first growing season. Increasing the performance of nursery-grown ruil seedlings is essential to restoring this endangered, vulnerable, and foundation species within the highly biodiverse, yet seriously threatened endemic Maulino Costero Forest of the Mediterranean climate of central Chile.
相似文献14.
Javier Puntieri Javier Grosfeld Marina Stecconi Cecilia Brion María Marta Azpilicueta Leonardo Gallo Daniel Barthélémy 《Annals of Forest Science》2007,64(8):839-844
Shoot growth and dieback were compared among progenies of nursery-grown seedlings of Nothofagus obliqua belonging to seven progenies of the same provenance (Quila-Quina, Argentina). First-year shoots consisted of one growth unit (GU) and second-year shoots of one or two GUs. The probability of development of two GU was similar for all progenies. Progenies were different in terms of shoot size, terminal bud abscission, the extent of shoot dieback after shoot extension and the node of origin of the relay shoot on the first shoot. Plants with a second-year shoot consisting of two GUs had a thicker stem and more nodes than those with single-GU shoots. The selection of N. obliqua seed trees based on architectural traits suitable for forestry development at specific sites must contemplate variability among progenies and their probabilities of successful development under different conditions. 相似文献
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Woo Kwan-Soo Fins Lauren McDonald Geral I. Wenny David L. Eramian Aram 《New Forests》2002,24(2):113-129
Statistically significant differences were found in 14 needle traits of western white pine (Pinus monticola Dougl.) seedlings grown from the same seed orchard source in the three nurseries in northern Idaho. Traits with significant variation included needle length and width, number of stomatal rows, number of stomata per row, total stomata per needle, adaxial surface area, stomatal density, major axes of stomata, stomatal shape, stomatal area, stomatal occlusion, epistomatal wax degradation, weight of wax per dry weight of needle, and the contact angles of water droplets placed on adaxial needle surfaces. Wax crystallites on needle surfaces were hollow and tubular and the amount of surface wax appeared to be associated with surface wettability. Our results may have important implications for tree improvement programs that require successful inoculation of nursery-grown seedlings with spores of Cronartium ribicola J. C. Fisch. ex Rabenh. to reliably screen white pines for resistance to blister rust. 相似文献
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A. M. Hietala 《Forest Pathology》1995,25(3):136-144
Rhizoctonia fungi were isolated from the roots of 2-year-old nursery-grown Norway-spruce seedlings displaying root-dieback symptoms. The most frequently isolated species, a uninucleate Rhizoctonia sp., was found to co-exist with binucleate Rhizoctonia in the same root system of several seedlings. All the uninucleate isolates anastomosed with each other forming a single anastomosis group with common cultural characteristics. Binucleate Rhizoctonia isolates were divided into several, morphologically dissimilar anastomosis groups (AG-I, R. spp.). In a pathogenicity test under sterile conditions, isolates belonging to the uninucleate Rhizoctonia sp. infected all root regions, particularly the root tips, resulting in a stunted root-system morphology, as was also observed in the isolation material. Binucleate Rhizoctonia spp. colonized only basal root regions, occasionally infecting cortical cells with monilioid hyphae, and had no effect on root growth. 相似文献
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Ole T. Helgerson 《New Forests》1989,3(4):333-358
Tree seedlings start to suffer stem damage or tissue death when the temperature at the soil surface reaches approximately 52°C. Seedling mortality rate accelerates as temperatures increase. Resistance to heat damage increases with size as the ability of a seedling to shade its base increase. Small newly germinated seedlings are at risk in late spring and early summer, while larger nursery-grown seedlings are at risk in mid to late summer, especially on soils with low heat capacity or conductivity, or with surfaces that are dry, dark colored or covered with organic matter. Heat damage to natural and planted seedlings usually occurs on flat or south-facing sites in regions with hot dry summers and clear skies, but can also occur in wetter regions under dry clear conditions. Shading only the basal portion of the stem appears to be as effective in preventing heat damage as shadingthe entire stem and some foliage, which can also reduce transpiration. Overhead shade and shade from live plants can reduce growth and survival. 相似文献
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Sarjala T 《Tree physiology》1993,12(1):93-100
The influence of ammonium on glutamine synthetase activity (GS, EC 6.3.1.2) was studied in three species of ectomycorrhizal fungi, Paxillus involutus (Batsch:Fr) Fr, Piloderma croceum Erikss. and Hjortst. and Suillus variegatus (Fr) O Kuntze growing in pure culture, as well as in the roots and needles of nursery-grown, non-mycorrhizal and mycorrhizal Scots pine (Pinus sylvestris L.) seedlings inoculated with Paxillus involutus or Piloderma croceum as the symbiont. In response to increasing concentrations of ammonium in the nutrient solution, GS activity (expressed on a dry weight basis) increased slightly in Suillus variegatus but not in the other fungi. Glutamine synthetase activity increased in the roots and decreased in the needles of non-mycorrhizal seedlings as the ammonium concentration in the nutrient solution was increased from 0 to 1 mM, but no response was noted with further increases from 1 to 12 mM. Interspecies differences in GS activity were noted among the fungi growing in pure culture, but no significant interspecies differences were observed among the same fungi in the mycorrhizal state. 相似文献
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Rhizoctonia solani was frequently isolated in the Italian Alps from nursery-grown European beech (Fagus sylvatica) seedlings displaying symptoms of cotyledon rot. Koch's postulates were verified and mode of infection of the associated isolates was investigated with light and scanning electron microscopy. Population structure of the pathogen was investigated by scoring the anastomosis reaction type in pairings between different isolates from the same seedbed. One pathogen genotype showed a large distribution area within the seedbed, this implying that the inoculum had been building up in the seedbed over a longer time period. Hyphal anastomosis tests and sequence analysis of the internal transcribed spacer (ITS) region of ribosomal DNA indicated that the pathogen belongs to AG 2-1 of R. solani. ITS sequence analysis indicates that the isolates from beech are closely related to R. solani isolates causing a disease on tulip. The striking similarities between the two diseases are discussed. 相似文献
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Population fluctuations of the European tarnished plant bug (Lygus rugulipennis Popp.) on nursery-grown Scots pine, Pinus sylvestris L. were monitored with sweep net samples over five growing seasons. The effects of cypermethrin, lindane and oxydemetonmethyl insecticide sprayings on the occurrence of Lygus adults and nymphs and prevalence of bud disorders of pine seedlings were studied. The number of Lygus bugs was highest in 1984, the first year of the study, and thereafter the annual levels of the bug declined, reaching a low in 1988. On 2- and 3-year-old Scots pine seedlings the numbers of overwintered L. rugulipennis adults and nymphs correlated positively with the occurrence of abnormal buds. Cypermethrin sprayings significantly reduced the numbers of Lygus nymphs in 1985 and 1987. In 1986 significantly fewer damaged seedlings and L. rugulipennis adults were found in pine transplants treated with cypermethrin. 相似文献