A nutrient addition experiment was set up in August 1993 in a species-rich primary lowland dipterocarp forest in Barito Ulu, Central Kalimantan, Indonesia. The following treatments were applied: control, +N, +P and +NP. There were five blocks of four 50 m x 50 m plots with a separate treatment for each plot. Fine litterfall was measured on all the plots from 1 May 1994 for 12 months. Litterfall mass and phosphorus concentrations were significantly higher in all the fertilizer treatments compared with the controls. All trees (> or = 10 cm dbh) were measured in August 1993 and in August 1998, and there was no significant girth increment response to fertilization in dipterocarps or non-dipterocarps. Dipterocarps of the red meranti group showed a doubling of girth increment in the +NP treatment, however, the difference from the control fell short of significance.
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机译：1993年8月在印度尼西亚加里曼丹中部Barito Ulu的一个物种丰富的原始低地龙脑香树林中建立了营养添加实验。应用了以下处理：对照，+ N，+ P和+ NP。有四个50 m x 50 m地块的五个块，每个地块都有单独的处理。从1994年5月1日起，在12个月内对所有地块进行了良好的凋落物测量。与对照相比，所有肥料处理中的凋落物质量和磷浓度均显着更高。在1993年8月和1998年8月对所有树木（>或= 10 cm dbh）进行了测量，在双果皮或非双皮果类中，没有明显的周长对施肥的反应。红柳桉组的双腕果在+ NP处理中显示出周长增加一倍，但是，与对照组的差异达不到显着性。
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