Ingenious management measures for spinach sowing
After spinach sowing, buckle the greenhouse, generally two water seedlings, and then irrigate one water 10 days after emergence. After the two true leaves of spinach unfold, the leaf number, leaf weight and leaf area increase rapidly, keep the soil moist before 3-4 leaves, apply 25 kg ammonium bicarbonate per mu, shallow hoe once, remove the dense seedlings from time to time, and control the water properly. Pay attention to heat preservation before and after "Lesser Snow" in November, and release air and dehumidification at noon. In order to appear on the market ahead of time, a small arch shed can be set up during the overwintering period. spinach begins to turn green after late January and should be released gradually. The suitable greenhouse temperature is no more than 25 ℃. When the temperature is high, the spinach plant is thin and weak, the leaves curl, the quality decreases and the yield decreases. And pay attention to watering the green water, apply 25 kilograms of ammonium bicarbonate with the water, and then irrigate once every 7-10 days, and fertilize again.
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Nitrogen deficiency in spinach and its control measures
Spinach nitrogen deficiency: the leaf color is light green, the basal leaf (old piece) turns yellow, gradually develops upward, and turns brown when dry. The plant is short, the branch (tiller) is few, appear the phenomenon of premature senescence. Control methods: apply sufficient base fertilizer, 2000-3000 kg per mu of rotten fertilizer, 30-35 kg of phosphate fertilizer and 10-15 kg of potash fertilizer. 2 Murray.
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Techniques of overwintering and seedling protection of spinach in North China
Western celery, also known as parsley, parsley, and American celery, is planted in the Shuyang area in autumn, with a general yield of 3000murmur4000 kg per mu and a yield of 5000 kg per mu. Now its autumn high-yield cultivation techniques are briefly described as follows: first, the selection of improved seeds and sowing selection of late bolting, strong stress resistance, not easy to soften, thick and hollow meat.
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