湿地松丰产林的立地条件选择

本文较系统地调查研究了湿地松在我国十五个省(自治区)引种栽培的生长情况和生态条件。根据适地适树原则,分析阐明了建立丰产林基地的最适宜区、适宜区和不适宜区;以及在建立丰产林基地中,造林地选择的地形和土壤条件。

SITE SELECTION FOR HIGH YIELD STANDS OF SLASH PINE

Since 70'S, Slash pine has been introduced and cultivated in 15 Provinces (auto-nomous region) of China, the state of growth varies with diffenent environment. This paper shows that the increments of diameer breast height and tree height of a young and middle-aged Slash pine stand are biggest in mid subtropical climate, also biggest in downland and bankland of rivers, lakes, and aeolian sandy soil of coastal regions. and the increments are reducing with higher altitude; The thickness of soil layer, especially active soil layer that bulk density is lower than 1.35~1.40g/cm3 and non-capillary porosity is higher than 10%, and soil available moisture content are major factors affecting the increments.