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本文供试材料为GT1,主要探索幼龄胶树提早采胶的可能性。1976-1980年试验表明,树围50厘米以上的幼树,在合适的刺激强度和采胶强度的调控下,改变了光合产物的分配率,提高了经济系数,干胶产量不仅比常规刀割高,而且比同采次的刺激刀割高,树围生长抑制亦较少,树围30～49厘米的幼树,干胶产量、产量递增率和干物质分配率均较低,树围生长抑制严重。因此,从适当提早投产,又尽量减少副作用考虑,初步认为,海南地区无性系GT1以离地100厘米处有50％树围达到45厘米以上为针刺采胶标准。本文还研究了原针孔产胶机能的恢复状况。结果表明,树围50厘米以上的胶树,原针孔经三年再生,已达到同高度原生皮的产胶水平,树围50厘米以下的幼树尚未完全恢复。其它副作用尚不显著。
In this paper, the test material for the GT1, mainly to explore the possibility of early plastic seedlings young gum. Tests from 1976 to 1980 showed that under the control of appropriate stimulus intensity and harvesting intensity, saplings with trees more than 50 cm in diameter changed the partition ratio of photosynthate and increased the economic coefficient. , But also higher than that of the same excavated knife, the growth inhibition was less in the shrubs, and the saplings, glutelin production, yield increment rate and dry matter partition ratio of the shrubs with 30-49 cm of shrubs were lower, . Therefore, from the appropriate early put into production, but also to minimize side effects, preliminary that the clonal GT1 in Hainan to 50 cm off the ground at 100 cm to 45 cm above the acupuncture for plastic mining standards. This article also studied the recovery of the original pinhole glue machine performance. The results showed that the gum tree with the circumference of 50 cm or more was regenerated from the original pinhole for three years and the level of rubber production reached the same level as that of the native skin. The young tree below 50 cm had not fully recovered. Other side effects are not significant.