In the early spring, when the supply of nitrogen fertilizer is lacking, nitrogen can be added to newly planted saplings at the shoot growth stage (early May), and 50-100 grams of urea per plant and 100-150 grams of plants between 2-3 years old. Plants that grew too weak and had too much effect were 1 kg per plant. After the application of irrigation torrent, to ensure the growth of branches, leaves, young fruit. It is still controlling nitrogen and controlling water for Wang Changshu.

At the end of May or early June, Pusu once again multi-element compound fertilizer or nitrogen, phosphorus and potassium compound fertilizer. After the application of irrigation water, create more fertilizer and less water conditions to facilitate flower bud differentiation.

(B) Root-sprayed fertilizer

Newly planted plants, due to the new roots just started growing, the number is small, and the suction fertility is weak. After the leaf exploding (in early May), 0.3%--0. 5% urea can be sprayed every 10 days, and even sprayed 2-3. Times to promote seedling growth.

Spray the 0.5% urea and 2% superphosphate calcium leachate, 0.4% potassium chloride (potassium sulfate) mixture, or 0.5% urea and 0.4% potassium dihydrogen phosphate to the soon-to-effect sapling and effect trees. Flower bud differentiation and fruit growth. Some biostimulating hormones are also used in production.

(C) attention to trace elements

Calcium deficiency causes cell division and the composition of the cell wall to be affected, so it shows that the new root is short, thick, curved, and the tip is dead fast. Chlorophyll can not be composed of chlorophyll; therefore, leaf chlorosis is caused, growth is stagnant, young growth is slightly developed, and the fruit is not seasoned. Yellow, green and yellow-white spots appear between the veins of the base leaves, which then turn into brown patches. Iron deficiency caused abnormal development of chloroplasts in young leaves, chlorosis of leaves, and green veins.

In severe cases, the leaves are small and thin, and the leaves are yellow-green, yellow-white, or milky white: Along with the intensification of the disease, the veins of the leaves also turn green and turn yellow, and together with brown spots or withered edges, they gradually die and fall. In the absence of zinc, the auxin content in the tree is low, and the cells absorb less and cannot elongate. The tip of the new shoot is narrow, branches are slender, internodes are shorter, leaves are full of clusters, small and narrow, brittle and thick, often called lobular disease.

Trace elements do not represent unimportant, especially if the soil conditions are not good at this stage and the balance of mineral elements is not balanced. It can be replenished by means of earth and leaves.

(d) Water Management

At the beginning of May, the water supply of the new shoots should be sufficient during the growth period. Water should be controlled from the end of May to the beginning of June. The leaves should not be wilted and water should not be fed. The climate is too dry and only small water is used.

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