First, nitrogen deficiency: When the vegetable seedlings lack nitrogen deficiency, the seedlings grow weak, the stems are short and fine, the leaves are small, the two cotyledons first turn yellow, and continue to develop upwards. Finally, the whole plant is yellow or brown, and when it is severe, it will die; root vegetables Not inflated; knots are not easy to ball or bad balls. Remedial measures: Urea urea 7.5 to 10 kilograms, or use human urine plus appropriate amount of urea water pouring, can also spray 0.5-1% urea solution. 2. Phosphorus deficiency: Plants are short, leaves are small, leaf color is dark green, and the lower leaves become purple or red-brown; poor growth of lateral roots, roots of root vegetables do not swell; fruit vegetables delayed results or fruit ripening period is delayed. Remedy: Use 0.5 kg of superphosphate per mu for water soaking for 24 hours, add 50 kg of water after filtration, and apply 0.5 kg of urea to spray foliar, spray twice. Or use 100-150 grams of potassium dihydrogen phosphate and 50 kg of water for spraying. Third, the lack of potassium: seedlings in the seedling stage potassium deficiency symptoms are not obvious. In the adult seedling stage, symptoms appear on the old leaves. The tips and leaves of the old leaves turn yellow or turn brown, and spots of tissue necrosis along the veins are observed. The plants are poor in cold resistance and drought resistance, and are easy to fall down. Symptoms appear in the early stages of growth of the leafy vegetables; symptoms occur when the root vegetables are inflated; symptoms occur when the knots begin at the beginning of the knot, and the leaves shrink and have a hard touch; fruits and vegetables do not grow during the early stages of growth. Deficiency of performance, when the fruit is enlarged, symptoms appear on the old leaves. Remedy: Topdressing potassium chloride 5-8 kg per acre or plant ash 75-100 kg can also be foliar spray 1% potassium chloride solution or 3-5% ash soak the filtrate.
Winter is the season when a large number of cabbage are on the market, and there are many dishes made with them, such as hand-shredded cabbage, fried pork with cabbage, fried cabbage with cabbage, cold cabbage, fried cabbage with vermicelli, etc., all of which are very delicious. Among the dishes, shredded cabbage is the best!
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