从植物生理学的观点来看,水稻同其他一般作物一样是能够吸收铵态氮和硝态氮的植物。可是,日本及各国在水稻栽培中均不积极应用硝酸盐肥料。这是因为一般认为硝态氮不易为土壤颗粒吸附,因而在水田中易于流失,而且在灌水下的还原性土壤中容易脱氮逸散。但是笔者长期进行各种水稻丰产试验及分析农家的技术措施时,常常遇到不能够充分说明亩产1200斤糙长以上的高产情况。 From a plant physiology point of view, rice, like most other crops, is a plant capable of absorbing ammonium and nitrate. However, Japan and other countries do not actively use nitrate fertilizer in rice cultivation. This is because it is generally believed that nitrate nitrogen is not easily adsorbed by soil particles and is therefore easily lost in paddy fields and is easily removed in a reducing soil under irrigation. However, when I conducted various high-yield rice experiments and analyzed farmhouse technical measures for a long time, I often encountered problems of not being able to fully explain the yield of more than 1,200 kilograms of rough breads per mu.