日本的北九州地区山地坡度不大,土地干燥,瘠薄的林地到处可见。这些林地并没有充分利用,杂木林和小竹子丛生。这样的林地面积,福冈县就达到了三万二千多公顷。为了利用靠近城市的这些土地,福同林业试验场曾不断地研究从国外引进适合当地生长的速生树种。主要研究选择对土地条件要求不严的洋 In Kitakyushu, Japan, there is not much slope in the mountains, and the land is dry and barren woodlands are everywhere. These woodlands are not fully utilized, with mixed woods and small bamboos clustered. This forest area, Fukuoka Prefecture reached more than 32,000 hectares. In order to take advantage of these lands near the city, Fookong Forestry Experimental Site has been constantly studying the introduction of fast-growing tree species suitable for local growth from abroad. The main research choice of the land requirements of the lax ocean