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Windproof vigorous growth period management
This period is the period when wind and vegetative growth and reproductive growth go hand in hand. The demand for various nutrients and water is significantly increased. It is critical to strengthen field management and meet the requirements for water and fertilizer conditions in a strong growing season. (1) Intertillage and weed control: The duration of the wind rejuvenation from breeze to vigorous growth is more than 2 months. During this period, the production fields are still mainly based on root growth and development. In the field, cultivators are often used for cultivating soil, soil is used for soil conservation, weeds are eliminated, and root systems are improved. Growing environment, promote root growth. After the plants are sealed off, weeds should be removed in time to prevent grass shortage. (2) Extra-root fertilizer: According to the growth condition of plants, if there is insufficient nutrition, extra-root fertilizer may be applied. In the windless afternoon, spraying a certain concentration of potassium dihydrogen phosphate, spraying Po, rooting agent (used as specified), to supplement nutrient supply, extend the functional period of the leaf, prevent premature aging of the plant. (3) Snoring and stimulating roots: In the year of wind-proof sowing, only leafy tussocks were formed, and in the second year from June to July, more than 80% of the plants were convulsed and flowered. After the plants on the ground bloom, the underground roots begin to be lignified and hollow, which seriously affects the quality of medicinal roots or loses medicinal value. Therefore, the plants other than the planting field for more than 2 years must be removed in time when the calyx appears, usually 2 or 3 times, and they will be destroyed when they are seen, so as to avoid flowering and consume nutrients and affect the development of roots. The seedlings shall be planted in the planting area and no snoring shall be performed. In the 3 to 4 year wind-proof field, the plants that grow robustly and have strong and full plants are selected. (4) Dehumidification and deodorization: When the field encounters flooding or stagnant water, the plant growth is weak and it will cause rot-root phenomenon. Therefore, the rainy season should be combined with soil, deeper sulcus to facilitate drainage, so as not to affect plant growth. (5) Rotation of crop rotation: Windbreak continuous cropping will cause problems such as unbalanced soil fertility, serious diseases and insect pests, etc., resulting in poor plant growth, poor root development, and impact on windbreak yield and quality. Therefore, windrow cultivation should be implemented to avoid cropping.