Effects of Phosphorus and Potassium on the Quality and Yield of Grafted Watermelon Heifeicui

The effect of different quantity of phosphorus and potassium on the quality and yield of grafted watermelon Heifeicui using the randomized and grouped design of wide field was studied. The results showed that the quantity of phosphorus and potassium have significant effect on the stem diameter, the main vine length, the quality and yield of Heifeicui. Among them the highest production is A1B1 treatment (which is mixed by 682 kg/hm2 calcium magnesium phosphate and 504 kg/hm2 potassium sulfate). The yield reached 36 390 kg/hm2, compared with A3B3 treatment (which is mixed by 367 kg/hm2 calcium magnesium phosphate and 252 kg/hm2 potassium sulfate), increased by 4 800 kg/hm2 and the increasing rate is 15.20%. The soluble solids content of A1B1 treatment is the highest among all treatments.