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Showing 1 to 20 of 606 for “"Pinus"”.
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Studies on Species of the Aphid Genus Cinara on Pinus Edulis and Pinus Monophylla
… on the two different pinyon pine species, Pinus edulis Englem. and P. monophylla Torr. & Frem. In Chapter 2, I compared the morphology of C. wahtolca, C. edulis (Wilson) and C. terminalis (Gillette and Palmer) feeding on the two pinyons. All three species were larger when on P. monophylla, …
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Somatic embryogenesis in Pinus radiata
Somatic embryogenesis of Pinus radiata has been seen as an attractive alternative to traditional propagation methods. This is due to its potential for high multiplication rates and rejuvenation, as well as its compatibitity with molecular techniques. To date no commercial production of somatic …
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Determinación del crecimiento en vivero de tres especies de pino: Pinus oocarpa, Pinus tecunumanii y Pinus caribaea variedad Hondurensis procedentes de catorce sitios en la localidad de Matagalpa, Nicaragua
… del crecimiento en vivero de las especies Pinus oocarpa procedente de Pércilas. Daraylí, Los Alpes, Dipilto, Rodeo Grande y Cerro El Bonete: Pinus tecunumanii procedente de las Camelias, Apante, Yucul y San Rafael del Norte; Pinus caribaea variedad hondurensis procedente de Santa Clara, …
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Stafafura (Pinus contorta) í Norðtunguskógi. Fræ: dreifing-magn-spírun
… yfir 80 ár frá því að fyrstu stafafuru-fræin (Pinus contorta) voru flutt inn til Íslands frá Norður Ameríku og fyrstu plönturnar voru ræktaðar og gróðursettar hér á landi. Komið hefur í ljós að stafafura, einkum af kvæminu Skagway, er vel aðlöguð að aðstæðum hér á landi og lifir og vex almennt …
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Dendroclimatology of Pinus sylvestris L. in the British Isles
A study of the properties of tree-ring density and ring-width chronologies from five sites in the British Isles, two in Sweden and two sub-fossil sites in Northern Ireland is described. The technique of x-ray densitometry is used to measure density. It is shown that it is possible to use x-ray …
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ΚΛΗΡΟΝΟΜΙΚΗ ΙΚΑΝΟΤΗΤΑ ΠΑΡΑΓΩΓΗΣ ΡΗΤΙΝΗΣ ΧΑΛΕΠΙΟΥ ΠΕΥΚΗΣ (PINUS HALEPENSIS MILL)
… ΠΡΟΕΛΕΥΣΕΩΝ ΚΑΙ ΟΙΚΟΓΕΝΕΙΩΝ ΧΑΛΕΠΙΟΥ ΠΕΥΚΗΣ (PINUS HALEPENSIS MILL) ΣΕ ΔΥΟ ΔΙΑΦΟΡΕΤΙΚΑ ΠΕΡΙΒΑΛΛΟΝΤΑ. ΟΙ ΦΥΤΕΙΕΣ ΕΙΧΑΝ ΕΓΚΑΤΑΣΤΑΘΕΙ ΜΕ ΤΟ ΣΧΕΔΙΟ ΤΩΝ ΠΛΗΡΩΝ ΤΥΧΑΙΟΠΟΙΗΜΕΝΩΝΟΜΑΔΩΝ (RANDOMIZED COMPLETE-BLOCK DESIGN). ΑΠΟ ΤΗΝ ΕΡΕΥΝΑ ΑΥΤΗ ΠΡΟΕΚΥΨΕ ΟΤΙ Η ΠΑΡΑΓΩΓΗ ΤΗΣ ΡΗΤΙΝΗΣ ΕΙΝΑΙ ΕΝΑΣ ΚΛΗΡΟΝΟΜΗΣΙΜΟΣ …
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Untersuchungen zur Ökologie von Pinus rotundata LINK im Südschwarzwald
… der in Mitteleuropa endemischen Moor-Kiefer (Pinus rotundata) durchgeführt. Auslöser der Arbeit waren Absterbeerscheinungen der Moor-Kiefer und eine mangelnde Verjüngung derselben in gestörten Hochmooren des Südschwarzwaldes und Vegetationsveränderungen v.a. in der Randzone gestörter Moore zu …
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Modeling Green Weight of Loblolly Pine (Pinus taeda L.)
Green weight and green weight per unit volume relationships for loblolly pine trees have not been studied extensively and models for predicting weights across broad geographic areas are not readily available. In this regard three basic interrelated issues were addressed in this study: 1) an …
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Eco-hydrological pathways inferred from stable isotopes in a Pinus ponderosa and Pinus monophylla woodland of the Sheep Range, southern Great Basin, USA
… in the southern Great Basin of Nevada- <italic>Pinus ponderosa</italic> and <italic>Pinus monophylla</italic>.Samples of xylem and leaf tissues from multiple trees at the site were collected and analyzed for δ<super>18</super>O and δD. Additional samples from groundwater, soil …
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The influence of low moisture stress on the gas exchange and thylakoid activity of loblolly pine (pinus taeda) and aleppo pine (pinus halepensis)
The objectives of this study were to determine the influence of sublethal water stress on the physiology of loblolly and Aleppo pine. Gas exchange characteristics, uncoupled thylakoid electron transport capacity, and needle osmotic potentials were measured. Seedlings of both species were watered …
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Photosynthesis and transpiration in a dry-land Pinus radiata forest
… at the leaf and canopy scales in a dry-land Pinus radiata D. Don forest by combining gas exchange measurements with biophysical process-based models of photosynthesis, radiation transfer, and soil water balance. Responses of photosynthesis to leaf intercellular CO₂ concentration in two-year …
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Caracterización mecánica de la madera estructural de Pinus sylvestris L
… los resultados alcanzados para otras especies (Pinus nigra, Pinus radiata, Pinus pinaster) en estudios similares y con los datos resultantes de la caracterización con probetas de pequeñas dimensiones.
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Pinus spp. na produção de painéis de partículas orientadas (OSB)
Este trabalho teve como objetivo estudar algumas variáveis de processamento na produção de painéis OSB (oriented strand board). O plano experimental foi dividido em três etapas distintas: 1) construção e avaliação do orientador de partículas; 2) estudo dos efeitos da densidade dos painéis, …
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AVIAN FORAGING RESPONSE TO JACK PINE (PINUS BANKSIANA) VOLATILE CHEMICALS
… I tested this interaction in the jack pine (<em>Pinus banksiana</em>) forests in the Upper Peninsula of Michigan. I measured VOCs released from trees that were favored by foraging insectivorous and omnivorous birds and compared them to VOC measurements from trees that had no avian foraging. …
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Lateral development in roots and shoots of Pinus radiata seedlings
… range of growth active substances are presented. Pinus radiata was chosen because of its availability, its role in forestry and its rapid and hardy growth. Although much is known about its shoot growth and silviculture and rooting of cuttings, only a limited amount of work has been concerned with …
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A dendrochronological investigation of Pinus radiata from Silvermine Nature Reserve
Whole trunk cross sections of Pinus radiata were collected from Silvermine Nature Reserve, Cape Town. The site was located on a hill in the nature reserve where precipitation was assumed to be a limiting factor in tree growth. Ring widths along 82 radii on 41 samples were measured to the closest …
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Diferenciación adaptativa entre poblaciones de Pinus canariensis Chr. Sm. ex DC
… en los distintos estados de desarrollo de Pinus canariensis. En dos ensayos de sequía llevados a cabo bajo condiciones controladas, las plántulas de pino canario mostraron adaptaciones morfológicas y fisiológicas adecuadas para la captación de agua y optimización de la fotosíntesis en …
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GENETIC EFFICIENCY IN TWO LOBLOLLY PINE (PINUS TAEDA L) SEED ORCHARDS
<p>The degree to which seed crops in seed orchards reflect the genetic variability and superiority present among orchard parents (genetic efficiency) was examined in two loblolly pine seed orchards using seven allozyme loci as genetic markers.</p><p>The frequency of outcrossed progeny in the seed …
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Elaboración de ecuaciones de volúmenes para pinus oocarpa Schiede en Nicaragua
Se elaboró dos tablas de voldmenes para Pinus oocarpa Schiede., una en función del DAPcc y la otra en función del DAPcc y la altura total. Estas tablas volumétricas se confeccionaron através de una muestra compuesta por 272 arboles provenientes de tres diferentes sitios de aprovechamiento forestal, …
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