Establishment of the Method for Greening and Its Management at seaside Reclaimed Land

目前，泽藤内海国家公园的绿化面积以及天然海滨森林面积明显减少，应考虑尽快采取基础调查和应对措施。本研究主要进行了以下几个方面的研究：(1)对天然海滨林区复垦土壤和表层土壤的物理性质进行了测定。(2)明确了有机和无机土壤改良剂对表层土壤稳定性的建立与应用后各种树种生长的关系。从盐碱抑制生长的角度出发，对第一可见抑制的树叶进行了连续的研究。(3)为了寻找最适合滨海绿化的树种，采用无机(包括吸水剂)和有机土壤改良剂对各种树种的种子进行播种，并对每种树种的萌发和生长进行了测定。(4)特别是在这一年，从林区自然更新的角度分析了天然树种苗木的自然外观或外观不良的现状。(5)建立了消除树木盐害的技术。降雨的反复排涝对盐分含量的降低是有效的，尤其是在多水区。

Now, a rapid decrease in green area of the National Park of Seto Inland Sea as well as natural seaside forest area is obvious, therefore it should be considered to taking the fundamental investigation and the measures against it as soon as possible. In this study, the following investigations are carried on.(1) The physical property of reclamation soil and surface soil in natural seaside forest area is measured.(2) the relationship between the application of organic and inorganic soil conditioner to establish the stability of surface soil and the growth of various tree plants after the application is clarified. With the view point of the inhibition of growth by salt, the leaf of first visible inhibition is investigated successively.(3) To find the best kind of trees for greening the foreshore land, the seeds of various trees are seeded after the application of inorganic (including thewater absorbing chemicals) and organic soil conditioner, and the germination and the growth of each kind of trees are measured.(4) Especially in this year, actual status of natural appearance or dsappearance of seedlings from natural tree seed is analyzed from the view point of natural renewal in forest area.(5) The techniques to eliminate the salt damage of trees are established. The repeated flooding and drainage of rainfall is effective to decrease in salt contents, especially in case of hedro area.