Timely watering: spring water to be poured back, pouring green water to be timely, premature watering will reduce the temperature of the soil, is not conducive to the growth of onions, will inhibit the growth of plants too late, the occurrence of leaf tip phenomenon. It is generally believed that the mature tubular leaves of onions turn dark green, the leaves are hypertrophied, the waxiness of the leaves is increased, and the color of the heart leaves is deepened, which is the sign of the end of the seedlings in this period. After the seedlings are planted, they are generally poured with water every 5 days to promote the rapid expansion of the bulbs. When the plants in the field are partially lodged, watering is stopped to avoid storage after the bulbs are harvested.

Spraying regulators for scientific fertilization: The first fertilization will be carried out after returning green in spring, supplementing the growth of the onion root system, and laying the foundation for the vigorous growth of the above-ground parts. The onion plant grows to 8 to 10 true leaves. When the bulb begins to grow in size, it begins to spray the fruit to reach the ground. This makes the underground fruit nutrient transportation conduit thicker, improves the fruit's enlarging vitality, the fruit surface is smooth, the fruit type is robust, and the high yield is high. .

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