scholarly journals THE EFFECTIVENESS OF NATURAL GROWTH STIMULANTS IN THE CULTIVATION OF SEEDLINGS OF PICEA OBOVATA LEDEB.

2021 ◽  
pp. 329-333
Author(s):  
Tatiana Vladimirovna Khurshkainen ◽  
Svetlana Karlenovna Stetsenko ◽  
Elena Mikhailovna Andreeva ◽  
Gennady Grigorievich Terekhov ◽  
Alexander Vasilievich Kutchin
Keyword(s):  
Forest Nursery ◽  
Picea Obovata ◽  
Siberian Spruce ◽  
Stages Of Growth ◽  
Planting Material ◽  
Agricultural Plants ◽  
Forest Nurseries ◽  
Slow Growing ◽  
Effective Growth ◽  
Seedling Tree

Picea obovata Ledeb. is a slow-growing in the early stages of growth type of coniferous trees. The use of growth stimulants in the cultivation of spruce seedlings can accelerate the production of standard planting material. The paper presents the results of research of plant growth regulators influence on spruce seedlings within three years of cultivation in forest nursery conditions. Before sowing seeds of spruce soak in solutions of biological-active preparations Verva and Verva-spruce, obtaining from Abies and Picea wood greenery extracts. The plants growth regulator Verva from Abies needles (operating substance – triterpenic acids) is applied in plant growing at cultivation agricultural and commercial crops. Operating substance of a preparation Verva-spruce used for protection of agricultural plants from diseases, are phenolic compounds of Picea wood greenery possessing fungicidal and insecticidal activity. It is established that spruce seedlings processed before sowing by bio-preparation had higher parameters of growth (seedling height, diameter of seedling tree at root neck) in comparison with control plants within three years of cultivation in conditions of forest nursery. Three-year spruce seedlings which have been grown up with use of growth stimulators Verva and Verva-spruce exceeded control on 20–30% on height and on 19–20% on seedling tree thickness.  Bio-preparations Verva and Verva-spruce can be recommended for application in forest nurseries as effective growth stimulators at cultivation of Siberian spruce landing material.

FUNGI COLONIZING CONIFEROUS SEEDLINGS IN FOREST NURSERIES OF MIDDLE SIBERIA

2021 ◽  
Vol 14(63) (1) ◽  
pp. 57-66
Author(s):  
Marina A. SHELLER ◽  
Elena A. SHILKINA ◽  
Aleksey A. IBE ◽  
Tatyana V. SUKHIKH ◽  
Inna E. SAFRONOVA
Keyword(s):  
Pinus Sibirica ◽  
Stone Pine ◽  
Siberian Stone Pine ◽  
Picea Obovata ◽  
Siberian Spruce ◽  
Phialocephala Fortinii ◽  
Phytosanitary Measures ◽  
Forest Nurseries ◽  
Pinus Sibirica Du Tour ◽  
Middle Siberia

The study was carried out in four forest nurseries of Middle Siberia. Affected seedlings of Scots pine (Pinus sylvestris L.), Scots Siberian stone pine (Pinus sibirica Du Tour), and Siberian spruce (Picea obovata Ledeb.) were collected for molecular phytopathological examination. In total, 14 fungal taxa were identified in the needles and roots of the plants. The most dominant among them were Sydowia polyspora (Bref. & Tavel) E., Didymella glomerata (Corda) Qian Chen & L. Cai, Cladosporium herbarum (Pers.) Link, Lophodermium seditiosum Minter, Staley & Millar, Phialocephala fortinii C. J. K. Wang & H. E. Wilcox and Cadophora finlandica (C. J. K. Wang & H. E. Wilcox) T. C. Harr. & McNew. The richness of the fungal taxa was higher in the needles than in the roots of all the tree species studied. The obtained results could be used for implementing more effective phytosanitary measures in the studied nurseries.

scholarly journals NEW TECHNOLOGY FOR PRESOWING TREATMENT AND SEEDING OF COMMON PINE SEEDS IN THE NURSERY

2020 ◽  
Vol 8 (1) ◽  
pp. 43-48
Author(s):  
Aleksandr Golev ◽  
Valeriy Ivannikov ◽  
Vladimir Bukhtoyarov
Keyword(s):  
Growth And Development ◽  
Seed Quality ◽  
New Technology ◽  
Growth Potential ◽  
Forest Nursery ◽  
Genetic Characteristics ◽  
Planting Material ◽  
Presowing Treatment ◽  
Effective Growth

When reforestation is cut down for various needs of our country coniferous forests significantly reduced their quality, mainly due to the fact that they are poorly renewed. One of the reasons for this is the low quality of seed material, harvested usually not from the testes and plus trees, but from trees with low genetic characteristics of trees. In the resulting seed mix to contain different fractions of seeds differing in seed quality. When sowing such heterogeneous seeds in a forest nursery at the end of the growing season, a significant part of the grown seedlings (up to 30 %) goes to marriage, because they do not meet the requirements of the standard. This is because, contained in the total mass of small seeds do not have the growth potential that large, and when they grow together, seedlings grown from small seeds do not meet the requirements of the standard, because in the process of growth and development are oppressed by larger seedlings. The new technology for sizing pine seeds allows you to completely separate the fractions of small seeds. Sowing small seeds separately from large ones at the optimal depth of planting, you can create conditions for their effective growth and development, as well as provide additional planting material that meets the requirements of the standard.

scholarly journals Analysis of the polymorphism of microsatellite loci in Picea abies (L.) H. Karst. and Picea obovatа Ledeb populations

2021 ◽  
Author(s):  
В.А. Волков ◽  
Г.В. Калько
Keyword(s):  
Molecular Markers ◽  
Picea Abies ◽  
Microsatellite Markers ◽  
Microsatellite Loci ◽  
Geographic Origin ◽  
European Part ◽  
Picea Obovata ◽  
Siberian Spruce ◽  
Planting Material ◽  
European Part Of Russia

Процессы генезиса хвойных лесов интенсивно изучаются с использованием методов молекулярного маркирования. Микросателлитные локусы рассматриваются в качестве наиболее полиморфной и воспроизводимой системы кодоминантных молекулярных маркеров. В цели исследования входило установить возможность использования микросателлитных маркеров для определения видовых различий между елью европейской и сибирской (Picea abies и Picea obovatа), а также оценить степень генетической обособленности региональных популяций ели на территории Европейской части РФ. Исследование показало, что использование набора из двенадцати микросателлитных маркеров позволяет разделить выборку елей, собранных с европейской и азиатской частей страны, на два генетических кластера, соответствующих видам Picea abies и Picea obovatа. Проанализированные в исследовании микросателлитные локусы могут быть использованы для оценки генетического разнообразия и географического происхождения ели европейской и сибирской. The processes of genesis of coniferous forests are widely investigating using molecular markers. Many studies are based on the analysis of microsatellite loci, which are acknowledged as the most reproducible and polymorphic co-dominant molecular markers. This study is aimed to establish the possibility of using microsatellite markers to determine differentiation between Norway and Siberian spruce (Picea abies and Picea obovata). Another task of this research was to assess the degree of genetic isolation of regional spruce population in the territory of European part of the Russian Federation. This study shows that using a large number of microsatellite markers allows to divide the sample of spruce collected from European part of Russia and Siberia in two genetic clusters, corresponding to Picea abies and Picea obovata. The microsatellite loci analyzed in the study can be used to assess genetic diversity and geographic origin of spruce trees and determine the origin of wood and planting material of Norway and Siberian spruce.

scholarly journals Pathogenicity and Virulence of Pythium Species Obtained from Forest Nursery Soils on Douglas-Fir Seedlings

Plant Disease ◽  
2013 ◽  
Vol 97 (6) ◽  
pp. 744-748 ◽  
Author(s):  
Jerry E. Weiland ◽  
Bryan R. Beck ◽  
Anne Davis
Keyword(s):  
Pseudotsuga Menziesii ◽  
Seedling Survival ◽  
The United States ◽  
Douglas Fir ◽  
Tree Seedlings ◽  
Pythium Species ◽  
Forest Nursery ◽  
Damping Off ◽  
Greenhouse Study ◽  
Forest Nurseries

Pythium species are common soilborne oomycetes that occur in forest nursery soils throughout the United States. Numerous species have been described from nursery soils. However, with the exception of P. aphanidermatum, P. irregulare, P. sylvaticum, and P. ultimum, little is known about the potential for other Pythium species found in nursery soils to cause damping-off of tree seedlings. A greenhouse study was conducted to evaluate the pathogenicity and virulence of 44 Pythium isolates representing 16 species that were originally recovered from soil at three forest nurseries in Washington and Oregon. Seeds of Douglas-fir (Pseudotsuga menziesii) were planted into soil infested with each of the isolates. Seedling survival, the number of surviving seedlings with necrotic root lesions, and taproot length were evaluated 4 weeks later. Responses of Douglas-fir to inoculation varied significantly depending on Pythium species and isolate. Eight species (P. dissotocum, P. irregulare, P. aff. macrosporum, P. mamillatum, P. aff. oopapillum, P. rostratifingens, P. sylvaticum, and P. ultimum var. ultimum) significantly reduced the number of surviving seedlings compared to the noninoculated treatment. However, all Pythium species caused a greater percentage of seedlings to develop root lesions (total mean 40%) than was observed from noninoculated seedlings (17%). Taproot length varied little among Pythium treatments and was not a useful character for evaluating pathogenicity. Results confirm the ability of P. irregulare, P. mamillatum, and P. ultimum var. ultimum to cause damping-off of Douglas-fir seedlings, and are indicative that other species such as P. dissotocum, P. aff. macrosporum, P. aff. oopapillum, P. rostratifingens, and P. sylvaticum may also be responsible for seedling loss.

scholarly journals Metabolomic analysis of extreme freezing tolerance in Siberian spruce (Picea obovata)

2014 ◽  
Vol 204 (3) ◽  
pp. 545-555 ◽  
Author(s):  
Liudmila Angelcheva ◽  
Yogesh Mishra ◽  
Henrik Antti ◽  
Trygve D. Kjellsen ◽  
Christiane Funk ◽  
...  
Keyword(s):  
Freezing Tolerance ◽  
Metabolomic Analysis ◽  
Picea Obovata ◽  
Siberian Spruce

Xylophilus ampelinus (canker of grapevine).

2021 ◽  
Author(s):  
Tanja Dreo
Keyword(s):  
Vitis Vinifera ◽  
Causative Agent ◽  
Bacterial Blight ◽  
Host Plants ◽  
Surrounding Area ◽  
Planting Material ◽  
Xylophilus Ampelinus ◽  
Slow Growing ◽  
Natural Dispersal

Abstract The causative agent of bacterial blight of grapevine, X. ampelinus, is a slow-growing bacterium. It is thought that only European grapevines (Vitis vinifera) are susceptible (Panagopoulos, 1988b). Natural dispersal from infected plants is limited to the vineyard and the immediately surrounding area and is mostly associated with pruning. Dispersal over large distances is expected to occur only associated with host plants, most likely during trading of planting material. It is difficult to control as outbreaks are sporadic and infections are often latent thus hindering detection.

Polymeric Nursery Bed Stabilization to Reduce Seed Losses in Forest Nurseries

1987 ◽  
Vol 11 (2) ◽  
pp. 116-119
Author(s):  
William C. Carlson ◽  
John G. Anthony ◽  
R. P. Plyler
Keyword(s):  
Vinyl Acetate ◽  
Water Erosion ◽  
Forest Nursery ◽  
Seed Zone ◽  
Forest Nurseries ◽  
Wind And Water Erosion

Abstract A polymerization treatment using Geotech, a copolymer of acrylate and vinyl acetate monomers, was used to stabilize forest nursery beds to substantially reduce wind and water erosion. Such treatment did not affect either the temperature of the seed zone in the soil or germinant emergence.Seed losses were reduced by the treatment, resulting in increased nursery yield. South. J. Appl. For. 11(2):116-119.

Phytomineral Gel for Seedling Roots Incrustation of Siberian Spruce (Picea obovata Ledeb.)

2019 ◽  
pp. 255-261
Author(s):  
A.L. Vorobyov ◽  
◽  
А.А. Kalachev ◽  
S.V. Zalesov ◽  
◽  
...  
Keyword(s):  
Picea Obovata ◽  
Siberian Spruce ◽  
Seedling Roots
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