The green onions in the autumn pay attention to watering matters
After the autumn festival, the temperature is obviously reduced and the air humidity is reduced. The appropriate temperature and humidity make the green onions enter a period of rapid growth. In the meantime, we must scientifically manage the water and fertilizer to create a suitable growth environment for the formation of light blue, thus increasing the output of green onions and Quality, in the production of specific to grasp the following points:
1. After the beginning of autumn, the temperature gradually decreased, and the root absorption function was transferred to a vigorous period. After entering the period of leaf growth, the need for water and fertilizers increased. During the period from the beginning of autumn to Bailu, the principle of watering was “light pouring, early and late pouring,†combined. Water topdressing “Loft of leaf attackâ€, applying 1500 kg of farmyard manure per acre, 20-25 kg of superphosphate, 10 kg of potassium sulfate to promote the rapid development of leaf parts.
2. After the white dew, the weather is cool, the temperature difference between day and night increases, green onions into the light blue and white formation period, is also a critical period of fertilizer management, in the white dew to the equinox, topdressing with a fast-acting nitrogen-based, with urea as the best, applied 20 kg per acre. It is advisable to use about 15 kg of potassium sulfate. The principle of watering is "diligence, heavy pouring," and often keep the soil moist to meet the growing needs of light blue.
3. After the frost has fallen, the weather is getting cooler and cooler, leaf growth is getting slower, and the transpiration of leaves is decreasing. Watering should be gradually reduced. Watering should be stopped 7-8 days before harvest to improve the storability of Welsh onion.
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