Fruit expansion period

During the annual management of fruit trees, the fertilization work during fruit expansion is particularly important. At this time, the fruit has changed from a nitrogen nutrient period to a sugar nutrient period, requiring a large supply of nutrient water. If it is malnourished, it will lead to fruit splitting. Therefore, during the fruit expansion period, it is necessary to ensure sufficient water and nutrients to meet the physiological needs of fruit development, so that the fruit is swollen rapidly, the color is good, and the fruit drop and fruit cracking phenomenon are reduced.

Excessive nitrogen is harmful during the rapid expansion of the fruit, which can induce the occurrence of bitter pox and also reduce the fruit coloration rate. Only by rational fertilization, coordinating the proportion of various required elements, improving light and efficiency, and the metabolic function of fruit trees can ensure the need for fruit enlargement. According to the physiological and nutritional characteristics of the fruit expansion period, spraying the fruit and fruit to make the fruit handle thicker, increase the nutrient transport capacity, increase the fruit's swelling vitality, enhance the fruit coloration, preserve fruit, strong fruit, and prevent fruit drop. At the same time, the corresponding addition of potassium fertilizer, calcium fertilizer, the accumulation of carbohydrates and the amount of transport to the fruit , to ensure the nutritional needs of the fruit expansion period, improve production and improve quality.