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根据化肥长期定位试验和全省化肥试验网的结果，广东省多数稻田施用氮磷钾营养元素的水稻增产效应为： Ｎ＞ Ｋ＞ Ｐ。大部分水稻土有效磷含量丰富或极丰富，施磷一般对当季水稻增产效果差甚至不显效。然而，连续数季植稻不施磷则导致氮钾施肥的增产效果下降而出现减产。综合养分不同丰缺类型水稻土的肥料效应和土壤养分平衡状况，通过肥料效应的回归分析，建立施肥量与产量之间的函数关系，确定广东省水稻专用 Ｂ Ｂ 肥营养配方及其产品的施用技术。经田间重复示范验证，本专用 Ｂ Ｂ 肥较之各地常规施肥和等实物量进口复合肥（１５ － １５ － １５） 有明显的增产效果，并可节约肥料资源，降低施肥成本。
According to the results of the long-term fertilization experiment and the results of the experiment network of chemical fertilizer in the province, the yield increasing effect of N, P and K nutrients in most paddy fields in Guangdong Province was: N> K> P. Most of the available paddy soil is rich in or rich in available phosphorus, and phosphorus is generally ineffective at increasing rice yield in the current season. However, the non-application of phosphorus in successive rice seasons resulted in a decrease in the yield-increasing effect of nitrogen and potassium fertilizers. Based on the fertilizer effect and soil nutrient balance of paddy soils with different deficiencies and deficiencies, regression analysis of fertilizer effect was used to establish the functional relationship between fertilization and yield, and to determine the application of nutrition formula and product for paddy rice in Guangdong province technology. After field repeated demonstration and verification, the special B and B fertilizers have obvious yield increasing effects compared with conventional fertilizers and equivalent quantities of imported compound fertilizers (15 - 15 - 15) all over the country, and can save fertilizer resources and reduce fertilizer cost.