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苏北沿海海岸线长约1039公里,土地面积约有21000平方公里,地势平坦,气候温暖,为暖温带向亚热带过渡地带,并兼有海洋性气候,为江苏省重要粮、棉产区之一。由于地势和季风的影响,风灾比较严重,5—6月时有龙卷风、冰雹危害,7—9月常有台风袭击,最大风力可达11级,并有干旱、寒流,特别是倒春寒的影响,威胁着粮、棉的稳产、高产。因此,在这一地区发展林业生产,建立防护林体系,不仅可以解决部分木材的供应和燃料的自给,而且还可以改善农田生境,保证粮、棉的稳产、高产。 本区的林业生产和防护林建设正受到各级政府和人民的重视,部分地区已显示出较好的经济和环境效益。但造林树种显得单纯。本文仅提出可供引种并适宜于苏北沿海防护林建设部分树种,供选择利用时参考。 1.银杏(Ginkgo biloba L.) 为果材
The coastline of northern Jiangsu coast is about 1039 kilometers long and covers an area of about 21000 square kilometers. It has a flat terrain and a warm climate. It is a transitional zone from warm temperate zone to subtropical zone and has both maritime climate. It is one of the important grain and cotton producing areas in Jiangsu Province. Due to the influence of the terrain and the monsoon, the typhoon is relatively serious, with tornadoes and hail from May to June. Typhoons are often hit in July-September. The maximum wind power can reach 11 and there is the influence of drought and cold, especially in late spring. Threatening the stability of grain, cotton, high yield. Therefore, developing forestry production and establishing shelterbelts in this area can not only solve the problem of supply of some wood and fuel self-sufficiency, but also improve farmland habitat and ensure stable and high yield of grain and cotton. The construction of forestry production and shelterbelt in this area is being valued by governments and people at all levels, and some areas have shown good economic and environmental benefits. However, tree species seem simple. This paper presents only for introduction and suitable for the construction of coastal shelterbelts in northern Jiangsu part of the tree species for the selection of the use of reference. 1. Ginkgo biloba L. is the fruit material