对茎围为40、45和50厘米的PR107无性系,分别用S/2·d/2、S/2·d/3割制割胶及对茎围为40厘米的PR107无性系,在S/2·d/2、S/2·d/3割制下,用2％乙烯利刺激割胶,四年的结果表明,对PR107无性系,在茎围为45厘米时即行开割,亩干胶产量、株次产等均较高,并且茎围增粗量较大,适量开割标准的株数较多。两种割制比较,用S/2·d/3割制割胶时,胶树死皮率并不比S/2·d/2的低,产量约比S/2·d/2的少41.5％,且乙烯利刺激效应差。由此看来,对PR107无性系,在加强管理的情况下,茎围达到45厘米时,用S/2·d/2割制另加2％乙烯利刺激采胶是适宜的 For PR107 clones with 40, 45 and 50 cm stems, the cuttings were cut with S / 2 · d / 2 and S / 2 · d / 3, respectively. 2 · d / 2, S / 2 · d / 3 cut, with 2% ethephon to stimulate the tapping, the results of four years showed that the PR107 clones, 45 cm in the stem when the line is cut open, Yield, yield and other strains were higher, and the stem thickening larger, the appropriate number of cutting more cutting the number of plants. Compared with the two kinds of cutting, the dead skin percentage of the gum was no less than S / 2 · d / 2 and the yield was about 41.5% less than that of S / 2 · d / 2. , And ethephon stimulation effect is poor. In view of this, with PR107 clones, it is desirable to cut S / 2 · d / 2 cut plus 2% ethephon to achieve 45 cm stems under enhanced management