有机无机复混水稻专用肥效果研究

为了研究有机无机复混水稻专用肥效果,2015年在晚稻上小区试验以不同用量处理基施,农民习惯用肥作对照;2016年在一季稻上小区试验以不同用量处理,按照处理750 kg/hm~2与等N量复合肥作对照,以基施和追施两种方式进行试验研究。结果表明:以基施效果最好,施用量为750 kg/hm~2产量最高;追施效果较差,低于750 kg/hm~2用量会造成减产。施用复混专用肥后,土壤pH值提高,有机质增多,碱解氮、速效磷和速效钾量增加,缓效钾量减少。试验表明:施用复混专用肥能够满足水稻一生所需养分供求,养分释放平衡,生长稳健,落色好,能够起到用地与养地相结合的效果。

Application Effects of Organic-Inorganic Compound Rice Specific Fertilizer

In order to study the application effects of organic-inorganic compound rice specific fertilizer, the experiments were conducted as basal and topdressing ways. Theorganic-inorganic compound rice specific fertilizer (CRSF) has total nutrients at 25% and organic matter at 45%. In 2015, different CRSF application rates were tested and the traditional fertilization was used as the control in a late rice field experiment. In 2016, different CRSF application rates and application ways were tested and an equal N application amount of compound fertilizer was used as the control in a single season rice field experiment. The results indicated that the CRSF used as base fertilizer was better in its effects than as topdressing fertilizer. The highest rice grain yield was found in the CRSF used as base fertilizer at 750 kg/hm2, while the decrease of rice grain yield was observed for the CRSF applied as topdressing fertilizer at rate < 750 kg/hm2. The application of CRSF increased soil pH, the contents of organic matter, and available N, P and K in soil, but decreased the content of slowly available K in soil. In conclusion, the application of CRSF is suitable for rice growth and also could improve the fertility of the paddy soil.