The improved structure of the hole pattern of the seedling tray was created,A plurality of acupoints are arranged on the main body of a seedling tray with the required number of seedlings arranged in intervals,To provide medium filling and storage and seedling planting；Among them, the cave lattice has a central axis through the hollowing in the upper and lower axial directions,In addition, a plurality of dielectric limiting surfaces are arranged in a pre equidistant ring with a central axis,The resistance surface of the medium is relative to its central axis and forms a resistance angle fixed by the limiting medium,The end face of the resistance limiting surface of the medium is concave with a groove with a fixed width and a longitudinal extension,By using the air with the gap width and the central axis running through the hollow, the radial development of the seedling root and the generation of the branch root can be prevented.本創作育苗盤的穴格改良結構，主要係在一苗盤本體上以所需育苗數排列間隔凹設複數穴格，藉以提供介質充填收納及種苗植設；其中該穴格係呈上下軸向貫穿鏤空而具一中心軸線，並以中心軸線預定等距環設複數介質限阻面，該介質限阻面相對其中心軸線且共成一限制介質定著的阻流角，該介質限阻面的端面係凹設具有固定縫寬而縱向延伸的一阻根槽縫，藉以縫寬及中心軸線軸向貫穿鏤空的空氣阻絕其植設種苗根的徑向發展與刺激支根產生。
