以第四纪红土红壤开垦的新辟稻田为供试土壤，以杂交早稻Ｖ２００为供试作物，进行田间试验，研究新辟红壤性稻田上水稻不同时期施用钾肥的效应。结果表明，在施用等量钾肥的条件下，钾肥以适当的比例作基肥和分蘖肥或基肥，分蘖肥和穗肥施用具有良好的效应，既可促进水稻对养分的吸收和早生快发，提高水稻产量，又可降低生产单位重量稻谷的吸氮量和吸磷量，提高氮、磷肥的生产效率，是水稻高产高效栽培技术体系的重要组成部分 The new paddy field reclaimed from lateritic red soil was used as test soil. The early hybrid rice V200 was used as the tested crop, and the field experiment was conducted to study the effect of applying potassium fertilizer on the paddy rice in the newly discovered red paddy soil in different periods. The results showed that under the condition of applying the same amount of potash fertilizer, potash fertilizer had the good effect of basal and tillering fertilizer or basal fertilizer, tillering fertilizer and panicle fertilizer application in appropriate proportion, which could not only promote the nutrient absorption, The yield of rice can also reduce the nitrogen uptake and phosphorus uptake per unit weight of paddy and improve the production efficiency of nitrogen and phosphate fertilizers, which is an important part of the system of high yield and high efficiency cultivation of rice