杭州地区淳安、桐庐、建德等县杉木基地造林,多数采用全垦整地,造林后间种油桐,套种玉米,既增产粮食,又促进幼林生长。但因浙北地区气温比较低,苗木生育期短,因此,一年生杉苗较矮小,造林当年,在套种玉米、铲草抚育时,杉苗易被泥块压 Hangzhou, Chun’an, Tonglu, Jiande and other county fir base afforestation, most of the whole land reclamation, after planting tung trees, intercropping corn, both increase grain production, but also to promote the growth of young forest. However, due to the relatively low temperature in northern Zhejiang Province, seedling growth period is short, therefore, shorter annual fir seedlings, afforestation year, in the intercropping corn, shoveling care, fir seedlings easily mud pressure