Cyclocarya paliurus (Batal.) Iljinskaja, as a woody tree species, has various health-promoting phytochemicals and is commonly used in tea production China. A field trial for C. was conducted at two typical sites to evaluate genotype × environmental interaction (GEI) effects identify the stability adaptability of 13 families. The main environment (GGE) were analyze GEI height, diameter breast he...

The diameter at breast height (DBH) and location of trees are important factors when surveying forest resources ecological functions. In this study, a device mainly comprising self-made DBH-measuring instrument positioning base station was used. hardware consisted two devices to simultaneously measure the DBH within sample plot. Specifically, is acquired by processing angle data with an algorit...

Height–diameter relationships based on stand characteristics (trees/ha, basal area, and dominant stand height) were investigated for balsam fir, balsam poplar, black spruce, jack pine, red pine, trembling aspen, white birch, and white spruce using data from permanent growth study plots in northern Ontario, Canada. Approximately half the data were used to estimate model parameters with the rest ...

In this paper, a new algorithm to improve the accuracy of estimating diameter at breast height (DBH) for tree trunks in forest areas is proposed. First, the information is collected by a two-dimensional terrestrial laser scanner (2DTLS), which emits laser pulses to generate a point cloud. After extraction and filtration, the laser point clusters of the trunks are obtained, which are optimized b...

The early detection of populations of a forest pest is important to begin initial control efforts, minimizing the risk of further spread and impact. Emerald ash borer (Agrilus planipennis Fairmaire) is an introduced pestiferous insect of ash (Fraxinus spp. L.) in North America. The effectiveness of trapping techniques, including girdled trap trees with sticky bands and purple prism traps, was t...

The main objective of this research was to evaluate the use unmanned aerial vehicles (UAVs) in estimating aboveground biomass and carbon, dasometric characteristics at three different spacings (2.5 m × 1.0 m, 2.5 2.0 3.0 m) a silvopastoral system (SPS) for production Tectona grandis. A total 90 trees were sampled, 63 which used perform evaluation (vertical horizontal) spacing test an SPS, rest ...

The protection and propagation of rare endangered species are key to the preservation their population development; however, due scarcity individuals, potential effects status in whole forest ecosystem still poorly understood. Using data from a 60 × 140 m dynamic monitoring sample Carpinus tientaiensis (Betulaceae) Zhejiang Southeast China. We assessed distribution diameter at breast height (DB...

This paper reviews an aerial sampling technique that could reduce the cost of calculating standing forest biomass in remote regions by collecting a geographically distributed set of large scale transects that include a limited number of permanent plots. The biomass of these plots is calculated from allometric equations and extrapolated to the transects as a function of tree species, crown diame...

(1) Background: The Cordia alliodora (Ruiz & Pav.) Oken (laurel) natural regeneration management is a widespread practice among smallholders in the Amazon upper basin for establishment of traditional agroforestry systems. This tree approach opposite to development project proposals that contemplate reforestation with nursery seedlings region. present study evaluated effects thinning levels ...

Abstract Peatland plays an important role as the storage of carbon stocks both in soil layer and biomass. The value peatlands is strongly influenced by peatland’s quality potential to produce emissions if natural conditions are disturbed. Revegetation can improve land cover compared succession. success revegetation be seen from survival rate growth performance planted species. purpose this prel...