我省为什么要确定油松、槐树两种树为省树呢?首先,我省南北跨纬度6°13′,长约680公里,东西跨经度4°17′,宽约380公里,境内沟壑纵横,地形复杂。气候类型属于温带大陆性季风气候,中南部属暖温带,北部属中温带,东南部有大面积的半湿润暖温带地区。复杂的地理气候条件,形成许多区域性小气候。因此,植物资源相当丰富。乔灌木约有 First, the province’s north-south latitude 6 ° 13 ’, about 680 km long, east-west longitude 4 ° 17’, 380 km wide, the territory of ravines Vertical and horizontal, terrain complex. The climate type belongs to the temperate continental monsoon climate, the warm temperate zone in central and southern China, the temperate zone in the north, and the large area of ​​semi-humid warm temperate zone in the southeast. Complex geographical and climatic conditions, the formation of many regional microclimate. Therefore, plant resources are abundant. Arbor about shrubs