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Sunday, August 2, 2020 | History

1 edition of Self-thinning and Growth Modelling for Even-aged Chinese Fir (Cunninghamia Lanceolate (Lamb.) Hook.) Stands = found in the catalog.

Self-thinning and Growth Modelling for Even-aged Chinese Fir (Cunninghamia Lanceolate (Lamb.) Hook.) Stands =

Jianguo Zhang

Self-thinning and Growth Modelling for Even-aged Chinese Fir (Cunninghamia Lanceolate (Lamb.) Hook.) Stands =

Sha mu zi ran xi shu yu sheng zhang mo ni

by Jianguo Zhang

  • 228 Want to read
  • 37 Currently reading

Published .
Written in English

    Subjects:
  • Forest influences,
  • Forest thinning,
  • China fir

  • Edition Notes

    Includes bibliographical references.

    Other titlesSha mu zi ran xi shu yu sheng chang mo ni
    StatementZhang Jianguo
    Classifications
    LC ClassificationsSD397.C52 Z43 2011
    The Physical Object
    Paginationiv, 142 pages ;
    Number of Pages142
    ID Numbers
    Open LibraryOL25403979M
    ISBN 107030320204
    ISBN 109787030320209
    LC Control Number2011512606
    OCLC/WorldCa781829990

    Xiongqing Zhang, Lele Lu, Quang V. Cao, Aiguo Duan, Jianguo Zhang, Climate-sensitive self-thinning trajectories of Chinese fir plantations in south China, Canadian Journal of Forest Research, /cjfr, (), (). Thomas Martin, Pernille Thorbek, Roman Ashauer, Common ground between growth models of rival theories: A useful illustration Jianguo Zhang, Aiguo Duan, Caiyun He, Estimation of the self-thinning boundary line within even-aged Chinese fir (Cunninghamia stands: Onset of self-thinning, Forest Ecology and Management, /

    The competition‐density (C‐D) effect for self‐thinning Pinus densiflora Sieb. et Zucc. stands was analyzed. The relationship between biological time τ and physical time t followed a hyperbolic curve. The coefficients A t and B included in the reciprocal equation of the C‐D effect in self‐thinning stands (i.e. 1/w =A t +B), where w and ρ, respectively, represent the mean stem. A database comprised of diameter frequency distributions of Chinese fir , such as Logistic, Gompertz, Richards all defined sigmoid curves, are also popularly applied to forest growth modelling Estimation of the self-thinning boundary line within even-aged Chinese fir .

    A systematic evaluation of nonlinear mixed-effect taper models for volume prediction was performed. Of 21 taper equations with fewer than 5 parameters each, the best 4-parameter fixed-effect model according to fitting statistics was then modified by comparing its values for the parameters total height (H), diameter at breast height (DBH), and aboveground height (h) to modeling data.   Chinese scholarship in the recent post-Mao liberalization has tended to represent Hu Feng and Lu Ling as heroic promoters of May Fourth Enlightenment in the face of the oppressive and authoritarian legacy of Yan’an and the Maoist discourses of revolutionary collectivism. Rather than a confrontation between the values of personal enlightenment.


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Self-thinning and Growth Modelling for Even-aged Chinese Fir (Cunninghamia Lanceolate (Lamb.) Hook.) Stands = by Jianguo Zhang Download PDF EPUB FB2

Self-thinning is a dynamic equilibrium between forest growth and mortality in fully stocked stands. In this study, the segmented model was used to analyze the trajectory of stand density and. Xiongqing Zhang, Jianguo Zhang, Aiguo Duan, A Hierarchical Bayesian Model to Predict Self-Thinning Line for Chinese Fir in Southern China, PLOS ONE, /, 10, Cited by:   A Hierarchical Bayesian Model to Predict Self-Thinning Line for Chinese Fir in Southern China Article (PDF Available) in PLoS ONE 10(10):e October.

Abstract. We calculated a self-thinning exponent of for tree mass using the 3/2 power equation in 93 Cunninghamia lanceolata plots. According to Weller’s allometric model, the self-thinning exponent for tree mass was calculated as from the allometric exponents θ and by: 3.

Abstract A self-thinning model is developed for fully stocked and under stocked pure even-aged stands. The self-thinning power law for fully stocked stands can be considered as a special case of this model. A stand growth model is developed by combining the self-thinning model with a basal-area increment model.

The long-term growth of even-aged forests has been modelled by considering self-thinning rules, normally used to model vegetation succession (e.g.

Smith and Hann, ; Tang et al., ;Meng et. Li Xue, Kazuharu Ogawa, Akio Hagihara, Shoulong Liang, Jingping Bai, Self-thinning exponents based on the allometric model in Chinese pine (Pinus tabulaeformis Carr.) and Prince Rupprecht's larch (Larix principis-rupprechtii Mayr) stands, Forest Ecology and Management, /S(98), (), ().

The self—thinning rule predicts that for a crowded, even—aged plant population, a log—log plot of total plant mass against plant density will give a straight line of slope —1/2.

It has been described as one of the more general principles of plant population biology, but the evidence supporting it has recently come under close scrutiny.

The self-thinning rule has played a critical role in controlling stand stocking and modeling stand development in forest stands. Chinese fir (Cunninghamia lanceolata) is a native and fast-growing. Research highlights The self-thinning exponent with a mortality interval of 2–67% sufficiently represented the maximum volume–density relationship for Chinese fir based on the onset of self-thinning.

Self-thinning exponents systematically change with different mortality intervals, and − is a transitory value in the course of self-thinning that gradually changes due to dynamics of.

The self—thinning rule predicts that for a crowded even—aged plant population a log—log plot of average plant mass vs. plant density will reveal a straight "self—thinning" line of slope– 3 / 2. Self‐thinning models were developed to describe the relationship between the stem number and mean diameter of even‐aged and monospecific tree stands undergoing self‐thinning.

The models were developed separately for Pinus sylvestris L., Picea abies (L.) Karst. and Betula pendula Roth. stands. Data from 41 unthinned permanent sample plots. Xiongqing Zhang, Quang V Cao, Hanchen Wang, Aiguo Duan, Jianguo Zhang, Projecting Stand Survival and Basal Area Based on a Self-Thinning Model for Chinese Fir Plantations, Forest Science, /forsci/fxz, ().

The allometric relationships of mean tree height to mean organ mass w were studied in Bruguiera gymnorrhiza stands.

According to Weller's allometric model, the self-thinning exponent α was estimated to be in leaf, in wood and in aboveground. The self-thinning exponent α in leaf was not significantly different fromwhich showed that the stand leaf biomass was constant. The Chinese economy is undergoing profound change in policy and structure.

The change is necessary to increase the value of growth to the Chinese community, and to sustain growth into the future. The changes are so comprehensive and profound that they represent a new model of Chinese economic growth.

This book describes the replacement of an old uninhibited investment. Xiongqing Zhang, Lele Lu, Quang V. Cao, Aiguo Duan and Jianguo Zhang, Climate-sensitive self-thinning trajectories of Chinese fir plantations in south China, Canadian Journal of Forest Research, /cjfr, (), (). Abstract A problem that has always existed in self‐thinning studies is the lack of objectivity in determining which data points to include when fitting the maximum biomass‐density line.

This paper demonstrates a more objective method of selecting data points using data from 12 even‐aged Pinus radiata stands undergoing self‐thinning. The method involves the division of a cluster of data.

Introduction. The self-thinning rule describes the mortality related to competition among trees within even-aged stands with full site occupancy [1, 2].The rule has been a topic of research and discussion for more than eighty years [3–5].In forestry, the rule has been used to develop relative density indices [6, 7], construct stand density management diagrams [8, 9], and serve as a predictor.

Zhang JG, Duan AG, Sun HG, Fu LH () Self-thinning and growth modelling for even-aged Chinese fir (Cunninghamia lanceolata (lamb.) hook.) stands. Beijing: Science Press. Beijing: Science Press. The competition density effect and changes of mean total tree weight (w) and stand density (ρ) during course of self-thinning were examined in even-aged pure stands ofEucalyptus camaldulensis Dehn.

which were planted in the tropical monsoon region. The level of competition was controlled by changing the initial stand density from trees ha−1 to 40, trees ha−1. Hozumi's model was. THE SELF-THINNING RULE: DEAD OR ALIVE?1 W.

M. LONSDALE Commonwealth Scientific and Industrial Research Organization, Division of Entomology, Tropical Ecosystems Research Centre, Winnellie, Darwin, Northern TerritoryAustralia Abstract.

The self-thinning rule predicts that for a crowded, even-aged plant popu.1. Many theoretical models have been proposed to explain the empirical self‐thinning relationship given by Yoda et al. in for even‐aged, monospecific stands of plants, but the models are inadequate to allow consensus on the processes driving variation in density‐dependent mortality and self‐thinning.

2. Most non‐individual based models (non‐IBMs), and many IBMs, employ a.b Center for Biosystems Modelling, Texas A&M Uni6ersity, College Station, Texas, TXUSA Abstract The self-thinning rule relates plant mass to plant density in crowded, even-aged stands by a power-law equation with an exponent ˝ The rule is widely accepted as an empirical generalization and quantitative rule that applies.