In the general case of autumn cabbage, it is appropriate to sow 3 to 5 days before and after the beginning of autumn, and the high temperature year can be postponed until mid-August. Late-maturing varieties with long-lasting disease resistance and long-term growth period can be properly spread early, and medium-maturing varieties with short growth period can be broadcasted for several days. The fertilizer and water management of autumn Chinese cabbage is introduced for reference.
top dressing:
The yield of Chinese cabbage is high, and the amount of fertilizer is large. On the basis of applying the base fertilizer, do not promptly topdress the fertilizer. The top dressing should be determined according to different growth periods and seedling conditions, and the seedling stage is generally not topdressing. If the bottom fertilizer is insufficient, the first time can be in the 3 to 4 true leaf stage, apply 10 kg of ammonium sulfate per acre, spread on both sides of the seedlings, and immediately water, called "lifting fertilizer"; the second time in the seedling or After the seedlings are transplanted, 15 to 20 kg of ammonium sulfate per acre is applied, and the ditch is applied on both sides of the ridge, which is called “fat fertilizerâ€; the third time in the rosette period, 25 to 30 kg of ammonium sulfate per acre, perphosphate 10 to 15 kilograms of calcium, put the fertilizer into the ditch or the hole, and then add a little soil to help the ridge, and then water, called "large top dressing"; the fourth time in the middle of the ball, 15 to 20 kg of ammonium sulfate per acre, Can be applied with water, called "filling heart fat."
Watering:
Chinese cabbage from the group to the rosette period, the temperature is gradually decreasing, the temperature is moderate, and water can be properly watered at this time. The end of the rosette can be properly controlled for several days, and then watered after the third top dressing. After the Chinese cabbage enters the ball-forming period, it needs the most water. Therefore, it is necessary to pour water once the seedlings are finished. Then, after a second to three days, a second water is poured. This time is very important, when the soil is cracked, the lateral roots will break, and the fine roots will die, affecting the ball. In the future, water is usually poured once every 5 to 6 days to keep the soil moist.
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