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本文论述了更新胶园生长初期的施肥措施和方法,并根据最近的研究结果与综合前期的研究工作,提出施肥推荐方案。施用尿素(氮)、磷矿粉(磷)和氯化钾(钾),均能相应有效地提高PB86、RRIC100、RRIC101及RRIC102幼龄胶树叶片氮、磷和钾含量。这种反应是由于各种养分单独作用的结果。从施肥到叶片磷含量发生变化所需的时间,比叶片氮、钾含量发生变化所需的时间长。试验还表明,每公顷施氮(尿素)190—310千克、磷(磷矿粉)100—160千克及钾(氯化钾)190—310千克,是提高PB86、RRIC100、101及102幼龄胶树生势的一种有效实用方法。除在天然与豆科混合覆盖胶园多施氮外,超出上述施肥量亦不可能有任何额外效果。在这种覆盖物下,氮肥用量可以提高到大约380—620千克/公顷。无性系RRIC100组与PB86相比,前者施用氮磷钾肥可以缩短非生产期18—24个月左右。尿素作为幼龄胶园(和成龄胶园)的唯一氮源,可以有效地施用。
This article discusses the application of new fertilization measures and methods in the initial stage of rubber plantation. According to the latest research results and the comprehensive preliminary research work, the fertilization recommendation scheme is put forward. Application of urea (N), phosphate rock (P) and potassium chloride (K) could effectively and effectively increase the N, P and K contents of leaves of PB86, RRIC100, RRIC101 and RRIC102. This reaction is due to a variety of nutrients alone. The time required for the change of phosphorus content from fertilization to leaf change is longer than the change of leaf nitrogen and potassium content. The tests also showed that 190-310 kilograms of nitrogen (urea), 100-160 kilograms of phosphorus (phosphate rock) and 190-310 kilograms of potassium (potassium chloride) per hectare are those of PB86, RRIC100, 101 and 102 An effective and practical method of tree growth. Except in the natural and legumes mixed with plastic covering more N fertilizer, beyond the amount of fertilizer can not have any additional effect. Under this cover, the amount of nitrogen fertilizer can be increased to about 380-620 kg / ha. Clone RRIC100 group compared with PB86, the former application of NPK can shorten the non-production period of 18-24 months. Urea, as the sole source of nitrogen in juvenile rubber gardens (and plasticized gardens), can be effectively applied.