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湖白土种植水稻增施磷肥均比不施磷肥增产，亩施磷肥２～８ｋｇ，平均增产稻谷４９．８ｋｇ，其对产量构成因素的作用是穗数＞粒数＞千粒重，故磷肥应作基肥施用。湖白土种植水稻磷肥最佳用量为每亩５．１３ｋｇ，考虑到旱作磷肥的后效应及生产中的实际情况，以亩施磷肥４ｋｇ为宜。同时磷肥必须与氮钾肥合理配施，才能实现高产、高效、高收益。
Compared with no phosphate fertilizer application, the application of phosphate fertilizer increased from 2 to 8 kg per acre of phosphate fertilizer and 49.8 kg of rice on average, and its effect on yield components was spike number> grain number> 1000-grain weight, so phosphorus fertilizer should be used as basal fertilizer . The optimal dosage of phosphate fertilizer for lake white clay planting is 5.13kg per mu. Taking into account the post-uptake effect of dry-land phosphate fertilizer and the actual production, it is advisable to use 4kg of phosphate fertilizer per mu. At the same time, phosphate fertilizer and nitrogen and potassium fertilizer must be rationally applied to achieve high yield, high efficiency and high yield.