Celery is rich in nutrients and is one of the vegetables that many people like. The planting process is relatively complicated. Because of its high requirements on soil, today Xiaobian will share with you the key to celery fertilization.
Celery is one of the types of vegetables that require high soil fertility. It is suitable for loam or clay loam with rich organic matter and strong water and fertilizer retention capacity. In general, celery consumes 2.55 kg of nitrogen, 1.36 kg of phosphorus and 3.67 kg of potassium per 1000 kg of production. The growth of nutrients in celery during growth is consistent with the increase in growth, that is, as the amount of growth increases, the amount of nutrient uptake increases. The growth and development of celery also requires trace elements such as calcium and boron. The celery needs a large amount of boron. When the boron-deficient soil or the low temperature inhibits absorption due to drought, the petiole is easy to be broken, that is, the "stem disease", which seriously affects the yield. And quality, so production should pay attention to the application of boron fertilizer. 1. Fertilization technology Under the medium fertility level, the fertilization amount per mu of celery is 350 to 400 kg of commercial organic fertilizer, 13 to 16 kg of nitrogen fertilizer, 5 to 6 kg of phosphate fertilizer, 6 to 9 kg of potassium fertilizer, and organic fertilizer as base fertilizer. Nitrogen and potassium fertilizers are divided into base fertilizers and top dressings. Phosphate fertilizer is used as the base fertilizer, and the fertilizer and organic fertilizer are mixed and applied. The base fertilizer is applied with 350 to 400 kg of commercial organic fertilizer per acre, 4 to 5 kg of urea, 11 to 13 kg of diammonium phosphate, and 4 to 5 kg of potassium sulfate. Second, the topdressing of the fertilization heart leaf growth season: 6 to 8 kg of urea, 3 to 4 kg of potassium sulfate. Prosperous long-term topdressing: When the plant enters the growth stage of the leaf plexus, the leaf area expands rapidly and the petiole rapidly elongates. In the early stage of vigorous growth, it can apply 8 to 11 kg of urea and 3 to 5 kg of potassium sulfate. In the middle of vigorous growth, it can apply 6 to 8 kg of urea and 3 to 4 kg of potassium sulfate. Third, 30 to 60 days after the root dressing of celery is the peak of nutrient absorption, and 0.5% urea or potassium dihydrogen phosphate aqueous solution can be sprayed 2 to 3 times. If the calcium and boron nutrients in the soil are insufficient, foliar spraying can be carried out with 0.3% to 0.5% calcium nitrate or calcium chloride. Foliar application of boron fertilizer can avoid the occurrence of stem cracks to some extent, and can be sprayed 0.2% on the foliar surface. Borax or boric acid solution. Facility cultivation can increase carbon dioxide gas fertilizer.
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