A range of various different planting distances (from 7.5 to 9.5 m) between oil palms were tested using an equilateral triangle design in a plantation density experiment which was settled in an oil palm commercial plantation in Nigeria. Climatic conditions were quite stable, with two seasons and around 2000 mm of annual rainfall. The soil was of desaturated ferralitic type, sandy on the surface, deep and without coarse elements. The early impact of plantation density was analysed at eight years after planting. Some early signs of depressive effect on yields were found for high planting densities (180 and 205 p/ha). Such a negative impact was not severe enough to counteract the effects of a higher number of palms per hectare. As a consequence, a gradient could be observed as yields (in tons of bunches per hectare) increased with density. We can anticipate that the competition effect between palms will increase over time with high densities, so that the counteracting point ought to be reached in a few years. A thinning treatment has been included in the protocol. Thinning was carried out at the end of the eight-year period. (Résumé d'auteur)
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机译：使用等边三角形设计在种植密度试验中对油棕之间的各种不同种植距离（7.5至9.5 m）进行了测试，该试验设计在尼日利亚的油棕商业种植园中进行。气候条件非常稳定，有两个季节，年降雨量约为2000毫米。土壤为不饱和铁素体类型，表面为沙土，较深且没有粗糙的元素。在种植八年后分析了种植密度的早期影响。高种植密度（180和205 p / ha）发现了一些对产量产生抑制作用的早期迹象。这样的负面影响还不足以抵消每公顷更多棕榈树的影响。结果，随着产量（密度每公顷吨）增加，可以观察到一个梯度。我们可以预见，随着密度的提高，手掌之间的竞争效果将随着时间的推移而增加，因此应该在几年内达到抵消点。方案中已包含细化处理。在八年期末进行了细化。 （Résuméd'auteur）
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