Plant interactions have long been the subject of intense research and debate in ecology. Competition facilitation are known to be basic drivers community structure, species coexistence, forest succession dynamics; however, there remains a lack understanding how spatial patterns affect these mixed coniferous broad-leaved species. In present study, we studied roles competition Zhejiang Province, ...

Korean pine (Pinus koraiensis Sieb. et Zucc.) is the most important forest vegetation in northeast China. The timber quality of this tree species largely driven by branch growth and distribution within crown. Thus, developing diameter length models, especially those that include competition indices, essential. A total 48 trees were selected to conduct destructive measurements characteristics. T...

This study aimed to determine the effects of root pruning on the physicochemical characteristics and microbial activities of poplar rhizosphere soil. The root systems of 5-year-old poplar (Populus×euramericana cv. 'Neva') trees were manually pruned at 6, 8, or 10 times diameter at breast height (DBH) from the trunk (severe, moderate, and light, respectively) along both inter-row sides. Moderate...

Abstract The greatest challenge faced when breeding populations of forest species is to achieve the right equilibrium among genetic gain and no loss effective population size. Thus this study aims define best thinning strategy compose a seed orchard Eucalyptus benthamii obtain maintaining E. studied consisted 28 open-pollinated progenies. diameter at breast height (DBH) (H) parameters were dete...

The ambrosia beetle, Platypus koryoensis (Murayama), vectors the Korean oak wilt (KOW) pathogen, Raffaelea quercus-mongolicae K.H. Kim, Y.J. Choi, & H.D. Shin, in Korea, which is highly lethal to Mongolian oak, Quercus mongolica Fisch., and is considered a major threat to forest ecosystem health. We characterized the attack pattern of P. koryoensis along the lower trunk of 240 Mongolian oaks i...

The quantitative structure model (QSM) contains the branch geometry and attributes of tree. AdQSM is a new, accurate, detailed tree QSM. In this paper, an automatic modeling method based on developed, low-cost technical scheme provided, so that can be freely used by more people. First, we two digital cameras to collect two-dimensional (2D) photos trees generated three-dimensional (3D) point clo...

In order to determine the best form factor formula for Loblolly Pine (Pinus taeda L.) plantations in Talesh (Western Guilan province-Iran), a number of 110 trees were selected based on their distribution in diameter classes, from 12 to 34 cm (in a two- cm diameter interval). First, several quantitative factors including diameter at breast height, diameter at 0.65 m of height, and diameter at st...

The global carbon is determined by forests at 45%. Mangroves sequester more per area unit than the dry land forest. sequestration capacities of mangroves in Ogooue Delta are still unknown. Thus, this study aims to set up a estimation equation for species Rhizophora racemosa and Avicennia germinans Ogooué Gabon. Data was collected 25 m * square plots four sites. dendrometry parameters were mainl...

Yield prediction has been determined to be vital in sustainable forest management. Recently, research trends have shifted from stand-level individual-level yield prediction. In this study, we examined the effectiveness of models based on a distance-independent approach for Japanese cedar (Cryptomeria japonica (L.f.) D.Don) trees western Japan. We further accuracy with reference existing data co...