Detailed Explanation of Key Cultivation Techniques for Introduced Sanhong Honey Pomelo

Choose a site sheltered from wind and facing the sun, with abundant water sources, deep and fertile sandy loam soil to establish the orchard. After the site is selected, use one-year-old grafted seedlings with well-developed root systems and vigorous growth for planting. The planting spacing is 3 m×3 m, and triangular planting is preferred. After planting well, carry out management tasks such as fertilizing, bagging and pruning.

1. Establishing the pomelo orchard: Choose a site sheltered from wind and facing the sun, with abundant water sources, deep and fertile sandy loam soil to establish the orchard, with contour terraces on the orchard land, a planting spacing of 3 m×3 m, and triangular planting preferred.

2. Selecting seedlings: Use one-year-old grafted seedlings with well-developed root systems and vigorous growth for planting. Under relatively good management conditions, the seedlings can quickly resume growth and the tree canopy also forms relatively quickly.

3. Fertilizing: Use annular trench application. The number of fertilizer applications should follow the requirements of “apply base fertilizer in autumn, apply bud-promoting fertilizer cautiously, and apply fruit-retention and fruit-sizing fertilizer in combination”, with 3-4 applications throughout the year. Mainly use organic fertilizer, supplemented by inorganic fertilizer, and apply more p and k fertilizer.

4. Bagging: First thin out poorly developed deformed fruit, small fruit and pest- or disease-damaged fruit. When the young fruit grows to a single-fruit weight of 100-150 grams and a fruit transverse diameter of about 5 cm, carry out bagging. When bagging, pay attention to proper tightness, so that the bag opening neither loosens nor damages the fruit stalk.

5. Pruning: Young pomelo trees are generally pruned twice, namely summer pruning and winter pruning; fruiting pomelo trees are generally pruned 3 times, namely spring pruning, summer pruning and winter pruning. Spring pruning is in February-March, summer pruning is in May-July, and winter pruning is half a month after fruit harvest, namely October-November. Focus on thinning out peripheral branches. For relatively dense canopies, the “skylight opening” pruning method may be used. For inner canopy branches, cut off fruiting branches, dead branches, pest- and disease-damaged branches and weak branches.