摘要
该文按单木竞争指标在构造中是否包括了对象木、竞争木以及树木的位置这些决定竞争状态的因素,把竞争指标分为完备型和非完备型两类,并认为非完备型只适用于受人为干扰较小的林分,只有完备型才适用于不同林分的动态模拟.本文还按理论和实践兼顾的原则,制定了评价竞争指标优劣的5条标准,其中一条要求竞争指标对林分竞争状态的变化反应灵敏,并具有适时可测或可估性.
The perfect and imperfect categories are presented as a new classification of competition indices on individual trees, based on whether the subject and competitive trees and their spatial distributions (which are the main aspects contributing to competition) , are involved in the indices estimation. Indices of the perfect category can be used in stand dynamic simulating, but imperfect ones behave well only in the case where the predicting stand remains untouched.Criteria with five items, which are used to judge the quality of indices, are offered considering that the indices should be theoretically reasonable and practical, and the important items of the five stresses that the indices are sensitive to competition status and measurable or predictable of individuals whenever they are encountered.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1992年第4期1-8,共8页
Journal of Beijing Forestry University
基金
自然科学基金
关键词
林分密度
林分
分类
评价
competition index, stand density, stand growth simulating
