本试验的目的是探求在第一次再生皮割胶时,用双割线或在高割面原生皮上开一半螺旋割线割胶并加或不加刺激处理,是否比通常采用的低割面半螺旋单割线制更为有利。试验区是1939年芽接的,共有136个不著名的品系,每品系约6株。1946年开始割胶;1951年10月开始进行试验,当时开始割第一次 The purpose of this experiment was to find out whether a semi-helical cut with a double cut or a semi-helical cut on a high-cut primary hide at the first reclaimed skin tapping, with or without stimulation, Spiral single cut line is more favorable. The experimental area is budding in 1939, a total of 136 unknown strains, each about 6 strains. Tapping began in 1946; in 1951 October began the trial, then cut the first time