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在海南花岗岩砖红壤上对柱花草进行了施用磷钾肥料配比试验。结果表明：（1）施用磷肥促进桂花草根系生长，根量增加。（2）施用磷肥促进地上部株高的增长和干草产量的提高，随磷肥用量增加产量比对照提高9．9％～23．8％；钾肥施用（K2O≤180kg/hm2），随钾肥用量的增加产量提高9．6％～17．9％。（3）磷钾肥能显著改善柱花草的品质，施磷可提高其蛋白质含量和干草全磷含量．施钾有降低其蛋白质含量的趋势和增加草粉次分含量。（4）根据磷钾肥与柱花草产量建立的回归模型计算，花岗岩砖红壤上最佳经济施肥量为P2O5113．gkg／hm2，K2O125．9kg／hm2。
In Hainan red granite soil on the column flowers were applied phosphorus and potassium fertilizers ratio test. The results showed that: (1) Phosphate fertilizer promoted the root growth of osmanthus fragrans grass and the root amount increased. (2) The application of phosphate fertilizer promoted the increase of shoot height and hay yield, and the yield increased by 9.9% ~ 23.8% as compared with the control with the increase of the amount of phosphate fertilizer. With the application of potassium fertilizer (K2O≤180kg / hm2) Increase production increased by 9.6% to 17.9%. (3) Phosphorus and potassium fertilizer can significantly improve the quality of Stylosanthes, applying phosphorus can increase its protein content and total phosphorus content of hay. Potassium has the tendency to reduce its protein content and increase the sub-content of grass. (4) According to the regression model established by the yield of P and K fertilizer and column flower, the best economic fertilizer on the red soil of granite brick is P2O5113. gkg / hm2, K2O125.9kg / hm2.