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杂交水稻在施足有机肥和氮、磷化肥的基础上增施钾肥,能充分发挥其杂种优势,获得高产。杂交水稻对钾素的需求与常规稻有所不同,尤其在齐穗期至成熟期还吸收19.2％的钾,而常规稻在抽穗扬花以后,几乎不再吸收钾素了。亩产千斤的杂交稻需吸收钾(K_2O)35—40斤,常规稻一般只需25—30斤。杂交水稻吸收钾远比常规稻高,且在各生育期干物质中
Hybrid rice application of sufficient organic fertilizer and nitrogen and phosphorus based on the application of potash fertilizer, can give full play to its heterosis, access to high yield. Potassium demand of hybrid rice is different from that of conventional rice, especially absorbing 19.2% of potassium from heading to maturity, whereas conventional rice almost no longer absorbs potassium after heading and flowering. Heavy yield per kilogram of hybrid rice need to absorb 35-40 kg of potassium (K_2O), conventional rice generally only 25-30 kg. Hybrid rice absorbs much more potassium than conventional rice and is in dry matter at various growth stages