摘要
用信息段法估测油松较密林分整株的雌花数和球果数 ,结果得出 :1 / 3CH可做为整株雌花数和春季当年球果数估测的最佳信息段 ;1 / 3～ 2 / 3CH可做为整株春季隔年球果数和秋季成熟球果数估测的最佳信息段 ;在人力充足的情况下 ,可考虑用 1 / 2 CH估测整株雌花数、当年球果数。
Information segment method was used to estimate the numbers of female flowers and pinecones of a whole Pinus tabulaeformis tree in dense forest stands.It was concluded that 1 /3CH can be used as the optimum segment to estimate the numbers of female flowers and pinecones of a whole tree in spring;1 /3～ 2 /3CH to estimate the number of biennial pinecones of a whole tree in spring and ripened pinecones in qautumn;1 /2 CH,however,to estimate the number of female flowers,the current year's pinecones and the ripened pinecones in autumn.
出处
《西北林学院学报》
CSCD
北大核心
1997年第A12期119-124,共6页
Journal of Northwest Forestry University
基金
林业部"八五"重点科技攻关项目!"中国主要造林树种开花结实规律及种子产量预测预报的研究"部分内容
关键词
种子产量
信息段法
预测预报
油松
球果数
forecasting of seed yield
Pinus tabulaeformis
information segment method
dense forest stand
information tree method
