膨化复混肥(下称膨化肥)是用膨胀珍珠岩和单质化肥及微量元素等混配制成的新型复混肥料。具有吸附性能好,肥效释放缓而长,可减少养分损失,提高肥料利用率等特点。据报道,在北方旱地作物上应用,有1～6％的增产效果,在南方水田作物上尚未有施用先例。为了探索膨化肥在水田作物上的生产效果,1992年我站在单季晚稻上开展施用膨化肥的试验、示范研究课题,为推广应用膨化肥提供科学依据。现将试验示范结果报道如下: 一、材料和方法 Puffing compound fertilizer (hereinafter referred to as puffing fertilizer) is a new compound fertilizer made of expanded perlite and elemental chemical fertilizers and trace elements. With good adsorption properties, slow release of fertilizer to reduce nutrient loss, improve fertilizer utilization and so on. It has been reported that there is a yield increase of 1-6% in the application of dryland crops in the north and no precedent has been applied to crops in the southern paddy fields. In order to explore the effect of puffed fertilizer on paddy field crops, in 1992 I stood on the single season late rice to carry out experiments on applying puffed fertilizer to demonstrate research topics and provide a scientific basis for the popularization and application of puffed fertilizer. Now test demonstration results reported as follows: First, materials and methods