摘要
利用竞争的观点对杉木单株平均直径生长进行模拟。引进树冠和冠长作为林木实现竞争的两个主要指标,用竞争力函数作为衡量竞争大小的主要潜力指标,求出潜在林木生长的竞争力函数和现实林木竞争力函数。用调节系数对现实林木竞争力函数进行调节,从而求出林木潜在直径生长曲线,对此生长通过竞争系数进行调节,导算出林木直径生长模型,同时通过竞争状态类比,比较竞争潜力,进一步求出林分直径生长的预测模型,并对此模型进行应用。它能用于预测林分每年生长,同时也能在生产上指导间伐及林分管理。
Study on the simulation of diameter growth of Chinese Fir is conducted based on the competitive mechanism of stands. The crown and its length are taken as main competitive indexes, and the competitive function f(Cr,l) as main growth potentials to calculate potential growth function ip(Cr,l) and practical growth function fd(Cr,l) of stands. The curve of potential diameter growth of a stand can be therefore brought out from the practical growth function adjusted by coefficient K. It is considered that the potential diameter growth of a stand is the growth of diameter under the environment without any competition, namely the potentials of diameter growth of a stands is fully played. So diameter growth models can be calculated through the potential growth function adjusted by competitive coefficient C. Furthermore, the forecasting model of diameter growth can be gotten from the comparison of competitive potentials f(Cr,l). The model can be used to forecast the annual growth of stands, and provide guidance for thinning and management of stands. It is also useful for the estimation of rational rotation and comprehensive management of stands.
出处
《林业科学研究》
CSCD
北大核心
1993年第2期210-215,共6页
Forest Research
基金
八五"攻关课题"杉木建筑优化栽培模式研究
关键词
杉木
间伐
林分
生长
Chinese Fir, thinning, competitive function, potential growth
