When applying base fertilizer in September, pay attention to applying farm manure or cake fertilizer with more potassium, and apply about 2 kg of decomposed cake fertilizer to each adult citrus tree. At the same time, attention should be paid to spraying potassium fertilizer during the fruit expansion period and the late fruit bearing period. #40; At this time, the demand for potassium in citrus is large, and root absorption is difficult to meet the demand for potassium fertilizer in citrus. #4 1; . It can be sprayed 2~3 times with 500 times of potassium dihydrogen phosphate solution imported from Singapore or 500 times of potassium Hefeng/KLOC-0 imported from Britain, once every 7~ 10 day. After potassium application, the fruits of potassium-deficient citrus trees are large and heavy, the soluble solid content increases, the vitamin C content increases, the acidity decreases, the flavor is rich, the pericarp is hard, the coloring is deepened, the cracking and wrinkling of fruits before harvest are reduced, the branches and leaves are rich, and the drought resistance is enhanced.

FYI