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在1957年和1958年,布置了4个相同设计的大规模田间试验(见表1),用来研究不同复盖植物对胶树生长的比较效应。共比较了匍匐豆科植物、禾本草、米甘草和天然复盖等4种复盖类型。在1960年召开的天然橡胶研究会议上曾讨论过这些试验的初步结果,本文简要地报导到1963年4月为止所获得的进一步的数据。
In 1957 and 1958, four large-scale field trials of the same design (Table 1) were arranged to study the comparative effects of different covered plants on the growth of gum trees. A total of four compost types were compared, including creeping legumes, grasses, rice licorice and natural covering. The preliminary results of these experiments were discussed at the Natural Rubber Research Conference in 1960 and this article briefly reports further data up to April 1963.