桥山林区油松采种基地结实原因及调查分析

近年来,山西、陕西等省份油松种子产量较正常年份减少幅度较大,有些地方甚至绝收,已严重地阻碍了林业生态工程建设步伐。本文就桥山林区油松采种基地结实原因进行分析调查。

Bridge mountain forest pinus tabulaeformis seed base solid reason and analysis

In recent years, shanxi, shaanxi of pinus tabulaeformis production provinces, such as pinus tabulaeformis seed production in a normal year decrease rate is bigger, some places even rejection, which has severely hindered the construction of forestry ecological engi- neering, now on bridge mountain forest pinus tabulaeformis sed base strong reason analysis of the investigation.