نتایج جستجو برای: uneven aged stands

تعداد نتایج: 225767  

2016
Xinyun Xie Jun Cui Wentao Shi Xijun Liu Xiao Tao Qin Wang Xiaoniu Xu

The quantification of biomass carbon pools is important for understanding carbon cycling in forest ecosystems. This study was designed to reveal the effects of stand age on biomass partitioning and carbon storage of Chinese fir plantation stands in Dabie Mountains of Anhui, East China. A total of six even-aged Chinese fir plantation stands along an age-sequence from 10 to 50 years were selected...

Journal: :Forest Ecosystems 2021

Abstract Background Studies on the relationship between biodiversity and ecosystem productivity have suggested that species richness functional diversity are main drivers of processes. Several patterns this been found, including positive, unimodal, negative, neutral trends, keeping issue controversial. In study, taxonomic as above-ground biomass (AGB) were compared, mechanisms influence product...

حسن زاد ناورودی, ایرج, سیدزاده, سیدحسین,

The effect of management was studied on the variation of some crucial forest stand features in the district nine of Shafaroud Gilan during a 20-year period. The survey was conducted in the regeneration affectation on 1985 and 2007. The measurement were done with a similar design (systematic randomized sampling in a 150×200m grid and 0.1 ha circular field plots) in 1985 and 2007, respectively. A...

Journal: :caspian journal of enviromental sciences 0

estimation and mapping of forest resources are preconditions for management, planning and research. in this study, we applied kriging interpolation of geostatistics for estimation and mapping of forest stock at-tributes in a natural, uneven-aged, unmanaged forest in the caspian region of northern iran. the site of the study has an area of 516 ha and an elevation that ranges from 1100 to 1450 m ...

Journal: :Agricultural Science Digest – A Research Journal 2022

Background: In this study 11 height and diameter prediction models were fitted evaluated for Himalayan Chir pine (Pinus roxburghii) in Jammu region of UT J K (India). The data collected from 50 permanent sample plots uneven aged stands Pinus roxburghii total 500 individual tree measurement used study. At initial stage all the resulted significant coefficients, besides various selection criteria...

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