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What are the key technical points for managing Schisandra chinensis during its growing period?

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1. Water management: In the first year after planting, water should be applied multiple times to ensure soil moisture content, thereby ensuring the survival rate of the seedlings and the normal growth of young trees. For trees that have entered the fruiting stage, in a normal year, ensure 4-5 waterings: pre-flowering water, post-flowering water, fruit-swelling water, and freeze-up water, while combining with intertillage and weeding. After watering, loosen the soil immediately to preserve moisture and prevent soil compaction. 2. Fertilization management: In the first year after planting, in early to mid-June, apply 15-20 kg of urea per 667 sq m as a top dressing. For 2-year-old plants, in early May, apply phosphorus

1. Water management: In the first year after planting, water should be applied multiple times to ensure soil moisture content, thereby ensuring the survival rate of the seedlings and the normal growth of young trees. For trees that have entered the fruiting stage, in a normal year, ensure 4-5 waterings: pre-flowering water, post-flowering water, fruit-swelling water, and freeze-up water, while combining with intertillage and weeding. After watering, loosen the soil immediately to preserve moisture and prevent soil compaction.

2. Fertilization management: In the first year after planting, in early to mid-June, apply 15-20 kg of urea per 667 sq m as a top dressing. For 2-year-old plants, in early May, apply phosphorus and potassium fertilizer and urea at about 20 kg each to promote growth, expand the canopy, and reach production as soon as possible. After the third year, in addition to top-dressing with chemical fertilizers, apply base fertilizer in autumn in early to mid-October to ensure soil fertility. For orchards with relatively high yields and weak tree vigor, a 5‰ urea solution can be used for foliar feeding.

3. Intertillage and weeding: Although Schisandra chinensis is a wild plant, after being introduced and planted in fields, attention must be paid to intertillage and weeding so that it can grow normally, bear fruit earlier, and reach production as soon as possible. Intertillage and weeding can also be combined with irrigation and fertilization, carried out 3-4 times each year. The first should be before budding, loosening the soil to preserve moisture while fertilizing; the second in mid-May combined with irrigation; the third in late June; and the fourth in mid-July. In short, there must be no serious weed infestation in the orchard. Intertillage and weeding reduce soil nutrient consumption and can also reduce the occurrence of diseases and insect pests.

4. Diseases: Leaf blight begins to occur in early to mid-July and can be controlled with a 0.01% solution of 5% thiophanate-methyl. Powdery mildew can be controlled by spraying a 0.125%-0.167% solution of 25% triadimefon. Both of these diseases can also be controlled in mid-June with a 1:1:200 Bordeaux mixture, with very good results.

5. Insect pests: Schisandra chinensis has relatively few insect pests, and under normal circumstances they do not occur. If they occur sporadically, they can be caught manually. If a large-scale outbreak occurs, low-toxicity pesticides such as zinc sulfophos and deltamethrin can be used for control, but 1 month before harvest, the use of all pesticides must be stopped to avoid pesticide residues that affect the quality of the medicinal material.

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