PROBLEM TO BE SOLVED: To provide a structure for easily laying conventional lawn-protecting panes and a lawn-protecting material for feeding air to the lawn by the stepping pressure of persons walking on it.SOLUTION: This plant protection material consisting of a lower frame laid on a base pane and an upper frame is provided with that the lower frame is constituted by lower part step-pressing parts and lower part-penetrating hole parts, the lower part step-pressing parts stand as projecting and are connected with each other, the lower part-penetrating hole parts are parts having holes, the upper frame is made from an elastic material and consists of upper part step-pressing parts and upper part-penetrating hole part, the upper part step-pressing parts are connected with each other and having a cylindrical form having a closed upper end and feeding the air by contracting with the stepping pressure, also the upper part step-pressing parts and lower part step-pressing parts are positioned so as to correspond the upper part step-pressing parts to the lower part step-pressing parts with each other on loading the upper part frame on the lower part frame, the upper part-penetrating hole parts are the hole parts, a connecting part is installed for connecting the upper part frame with lower part frame with each other, joining parts capable of joining them together with each other are installed at the lower part frame, the upper part frames are independent with each other and at least a part of the upper part-penetrating hole parts penetrates vertically through the lower part-penetrating hole parts.COPYRIGHT: (C)2008,JPO&INPIT【課題】本発明は、従来の芝生保護盤を容易に敷設する構造と、上を歩く人の踏圧により芝に空気を供給する芝生保護資材の提供にある。【解決手段】本発明は、基盤上に敷設される下部枠と上部枠からなる植物保護資材にあって、下部枠は、下部踏圧部と下部透孔部から構成され、下部踏圧部は凸状に立上りかつ互いに連結され、下部透孔部は孔部であり、上部枠は、弾性体製で上部踏圧部と上部透孔部からなり、上部踏圧部は互いに連結され、かつ上端が閉塞された筒状で踏圧により収縮することで空気を供給し、かつ上部踏圧部と下部踏圧部は、上部枠が下部枠上に載置される際上部踏圧部と下部踏圧部とが対応する位置にあり、上部透孔部は孔部であり、上部枠と下部枠には互いに接続する接続部が設けられ、下部枠には互いに接合可能な接合部が設けられ、上部枠は互いに独立し、
