沿海农田林网建设关键技术的经济学择优

对江苏沿海地区农田林网的经营类型、造林树种、林带配置进行了技术经济学分析和多目标灰色局势决策择优。结果表明：农田林网经营类型宜选择复合经营的果材兼用型林网。造林树种可选择速生丰产的杨树等用材树种和经济效益高的桃树等果树。林网配置在海堤河岸上选择用材树种,营造基干林带,筑起大网格框架；在道路沟渠上立体配置林果树种,营造主林带和副林带,构建中网格；在脱盐排水沟上添加果树辅助林带,建立小网格,形成多树种多林种合作、大中小网格配套、多道防线联防、多效益多产品产出的复合配置模式。

ECONOMICALLY PREFERRED KEY TECHNIQUES ON SHELTER BELT CONSTRUCTION ON COASTAL FARMLAND

Technical economy analysis and multi purpose preferred grey state strate gies concerning plantation tree species, shelterbelt composition and their management types on coastal farmland in Jiangsu Province have been reported. The results showed that the optimal selection of management types of windbreak network is the compound management of wood forest and fruit. And the main plantation tree species should select fast growth timber and economically high efficiency species, such as poplar, peach etc. The foundation shelterbelts, as the biggest lined network, was planted on the coastal banks; the main and assistant shelterbelts serving as moderate network can be planted by road sides and on ditch banks. The subsidiary shelterbelt as the smallest network, can be planted on ditches for desalinization and drainage purposes. Therefore, the compound structural model of multiplicity species, lined networks and shelterbelts, and more efficiency and high output products can be composed.