tree plantations
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Phytotaxa ◽  
2022 ◽  
Vol 530 (1) ◽  
pp. 65-76
Author(s):  
RUIFANG XU ◽  
KEVIN D. HYDE ◽  
SAMANTHA C. KARUNARATHNA ◽  
JIAN-CHU XU ◽  
PETER E. MORTIMER ◽  
...  

During a survey of rubber tree plantations in Yunnan Province, China, a fungus growing on natural rubber latex was collected and isolated. Maximum likelihood and Bayesian analyses of combined ITS, LSU, SSU, tef-α and rpb2 genes showed the isolated taxon belongs to Wiesneriomycetaceae and was well separated from closely related genera with high statistical support. It can be differentiated from other genera in Wiesneriomycetaceae by synnemata with catenate conidia that are cylindrical, 0–4 to multi-septate, often with a dark brown band at the septa. Morphology, phylogenetic analyses and pairwise homoplasy index (PHI) tests provide evidence that the new isolate is a distinct genus. The genus Heveicola is introduced, with H. xishuangbannaensis as the type species. A key to the genera in Wiesneriomycetaceae is also provided.


Author(s):  
Susana Gómez-González ◽  
Maria Paniw ◽  
José Luis Blanco-Pastor ◽  
Ana I. García-Cervigón ◽  
Oscar Godoy ◽  
...  

Author(s):  
M. O. Kvitko ◽  
V. M. Savosko

The main purpose of this work was to consider artificial tree plantations in terms of ecosystem approach, as a significant factor in improving the ecological environment for the introduction of the sustainable development paradigm in the conditions of industrial pollution Kryvyi Rih region. During 2015–2020, natural forest ecosystems and artificial forest plantations were studied by classical methods. These woody plantations are located in contrasting ecological conditions. The relevance of our research is determined by the need to find practical measures aimed at the formation and maintenance of woody plantations to increase resistance to areas under industrial pollution. The solution to this problem was carried out by assessing their living conditions and biometric indicators.


Author(s):  
N. V. Dragan

A phytosanitary inspection of the tree plantations of the memorial composition “integral prismatiod”. The affection of tree diseases was established visually in the presence of pathologies. In the examination of Fraxinus excelsior was used the method proposed by T. Kowalski et al, 2010. 43% of trees are healthy, about 30% of trees have minor pathologies, 21% of trees are very weak, 6% of trees are dry or withering. The main diseases were rot, necrosis and cancer, drying of the crown. The most dangerous disease was halar necrosis of Fraxinus excelsior, which led to the drying up of a large number of trees and affected half of the living trees. The prognosis of Fraxinus excelsior plantations is unfavorable. A change of dominant breeds will take place on the site, Acer platanoides will take the dominant position.


Author(s):  
Oleksandr Horielov ◽  
Oleksii Horielov ◽  
Ylija Krugliak ◽  
Igor Krasnoshtan ◽  
Valeriy Mykolaiko

Aim. The analysis of the taxonomic composition and living condition of tree plantations of roadside strips in Kyiv. Methods. Determination of the species composition and viability of trees and shrubs was carried out by route survey on test areas along the routes with different traffic intensity. The plants living condition was established according to the methodology developed by us, which provides an integrated vitality assessment based on a set of morphometric, reproductive and phenological features. Results. It is established that in the conditions of traffic flow of high intensity 23, of moderate 27 and of low 29 species of trees and bushes were found on the test areas. The tree plants of most common genera and species of roadside plantations are identified. The plants living condition analysis showed, that in the conditions of traffic flow of high intensity, plants of moderate and low vitality predominate; while in the conditions of moderate and low traffic intensity, the predominant numbers of plants have high vitality. Conclusions. Analysis of the range of roadside plantations indicates its limited and almost complete absence of conifers. The species composition is not optimal and is not always determined by the degree of resistance to transport pollution specific conditions. The woody plants vitality is largely determined by the traffic intensity and compliance with care technology.


Author(s):  
Chao Wang ◽  
Weiwei Zhang ◽  
Xiaona Li ◽  
Juying Wu

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1718
Author(s):  
Xu Wu ◽  
Yaobin Niu ◽  
Mengyao Xun ◽  
Junyi Jin ◽  
Yakun Tang ◽  
...  

Mixed-species tree plantations have additional ecological benefits over single-species tree plantations, such as habitat restoration and increasing biodiversity. However, changes in the soil carbon, nitrogen, and phosphorus storages and stoichiometry after mixed afforestation with the N-fixing tree species under the “Grain for Green Project” in the Loess Plateau of China are not well understood. Typical restoration types, including the mixed plantations of Pinus tabuliformis with Hippophae rhamnoides (HrPt) and Robinia pseudoacacia with H. rhamnoides (HrRp), as well as the pure forests of P. tabuliformis (Pt) and R. pseudoacacia (Rp), were chosen to examine changes in the storages and stoichiometry of soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) in 0–100 cm soil layers. The results showed that compared with the corresponding pure forest, HrRp significantly increased the SOC content in the 0–20 cm soil layer and the SOC storage in the 0–100 cm layer, while HrPt significantly increased the SOC content in the 0–10 cm layer, but there was no significant difference for SOC storage in the 0–100 cm layer between Pt and HrPt. Similarly, HrRp significantly increased the TN content in the 0–10 cm layer and the TN storage in the 0–100 cm layer, but there was no significant difference in TN storage between Pt and HrPt. Furthermore, HrRp significantly increased the TP content in the 0–100 cm layer and TP storage was higher than that of Rp, while there were no significant differences in TP content and storage between Pt and HrPt. In the 0–10 cm soil layer, HrRp significantly reduced C:N and increased N:P, but HrPt significantly increased C:P. In addition, compared with the pure forest, the soil physical and chemical properties had a stronger control effect on the soil storages and stoichiometric ratios in the mixed forests. In summary, compared with P. tabuliformis, the introduction of N-fixing tree species into the R. pseudoacacia forest was more conducive to the accumulation of SOC, TN, and TP reserves and the improvement of the N and P utilization efficiency. These results have important implications for the restoration of degraded vegetation and scientific management of mixed plantations on the Loess Plateau and can provide basic data for the assessment of soil quality at the regional scale.


2021 ◽  
pp. e00457
Author(s):  
Xaysatith Souliyavongsa ◽  
Alain Pierret ◽  
Vidhaya Trelo-ges ◽  
Supat Isarangkool Na Ayutthaya ◽  
Saysongkham Sayavong ◽  
...  

Trees ◽  
2021 ◽  
Author(s):  
Chitra Shukla ◽  
K. N. Tiwari ◽  
S. K. Mishra

Forests ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1360
Author(s):  
Piotr Boruszewski ◽  
Agnieszka Laskowska ◽  
Agnieszka Jankowska ◽  
Marcin Klisz ◽  
Marcin Mionskowski

Plantations have many advantages when compared to natural or semi-natural forests, such as shortening production cycles, the production of wood with specific characteristics, and near-market production concentrations. The intensive development of this form of industrial wood production is practiced all over the world. The wood industry in Poland struggles in recent years, with a large shortage of wood. The deficit of wood has been accumulated for several years and is steadily increasing. One of the possibilities to change this trend can be development of fast-growing trees plantations. The main aim of this study was to determine the potential of land in Poland, which could be used for the cultivation of fast-growing trees plantations. The analyses took into account the area and marginal agricultural land. The potential plantation land areas were determined for poplar cultivar “Hybrid 275” and European larch (Larix decidua Mill.). The results show a possibility to generate a considerable area that can be developed into plantations of fast-growing trees in Poland. According to the analyses carried out for the purpose of this study, with only 5% use of the sown area and 5% use of forest lands, as well as the boscage (wooded land and bushy land), it is possible to obtain approximately 0.6 MM ha of land for fast-growing tree plantations. In the case of planting 50% of these lands with larch and 50% with poplar, and if a 50% capacity of the plantation is assumed, it will be possible to obtain nearly 6 MM m3 of wood per year.


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