<span style="color: rgb(51, 51, 51); font-family: 宋体; font-size: 12pt;" ar-sa;"="" zh-cn;="" en-us;="" 0pt;="" roman";="" new="" "times="" times="">在评价赣榆县滨海通榆运河河岸堤顶、堤腰、堤底三个立地条件分异性的基础上，进行了１１个树种（品种）的引种试验和间作物配置，建立了１１种立体种植模式，分析了各个立地条件下的林木生长表现和经济效益。从生态、经济和社会的综合效益考虑，设计了河岸利用的最优模式：堤顶为香椿＋小麦＋大豆；堤腰为Ｉ－６９杨＋小麦＋大豆；堤底为Ｉ－１０５杨＋杞柳。预期经济效益可比原有纯杨树型模式提高４０.９％

Based on the comment of three different sites—TB (top part of the bank), SB (slope part of the bank) and  LB( low part of the bank) of Tongyu Canal bank in Ganyu county of Jiangsu Province, an experiment with trees introduction and g interplanting e was conducted. As the combination of trees and crops, various cubic sub-models on different sites (TB, SB and LB) was set up. Analysis of growth annual economic benefits produced by different tree on same site  compared with each other or by those same trees on different sites was carried out, the optimal trees and crops fit for TB, SB and LB were selected, furthermore, in the view of synthetic benefits of economic, ecology and society, so the optimal model is designed as following , TB: Tooma sinensis Roem. + wheat + bean, SB: polar I-69 +wheat + bean and LB: polar I-105+Salix purpurea L. Its annual profit will in crease 40.9% than that of model(TB, SB and LB: polar I-69 +wheat + bean).