1. Characteristics of fertilizer requirement: Because of the long growing period, broccoli has a large demand for nutrients. The most needed amount is nitrogen and potassium. Especially when the leaf clusters grow vigorously, more nitrogen fertilizer is needed, and the phosphorus needs more phosphorus during the formation period. Before the bud, it is necessary to ensure the full supply of phosphorus and potassium nutrition. In addition, broccoli requires a large amount of boron, magnesium, calcium and molybdenum. Therefore, on the basis of ensuring the supply of nitrogen, phosphorus and potassium fertilizer, appropriate amounts of trace elements such as boron and magnesium should be applied.
2. Fertilization technology: Under the medium fertility level, the fertilization amount per mu of broccoli in the whole growth period is 2500-3000 kg of farmyard manure (or 350-400 kg of commercial organic fertilizer), 20-23 kg of nitrogen fertilizer, 6-8 kg of phosphate fertilizer, and 11-potassium fertilizer. 14 kg, according to the crop variety and soil fertility, the fertilization amount is adjusted appropriately, the nitrogen and potassium fertilizers are divided into base fertilizer and three top dressings, and the phosphate fertilizer is used as the base fertilizer, and the fertilizer and the farmyard manure (or commercial organic fertilizer) are mixedly applied.
Base fertilizer: 2500-3000 kg of farmyard manure or 350-400 kg of commercial organic fertilizer per mu, 6 kg of urea, 13-17 kg of diammonium phosphate, 7-8 kg of potassium sulfate, 0.5 kg of borax. Top dressing: 10-11 kg of urea in the rose period, 5-6 kg of potassium sulfate; 13-15 kg of urea applied in the initial stage of flower bulb formation, 6-8 kg of potassium sulfate, and the formation of urea 10-11 potassium sulfate in the middle of the flower ball 5-6 kg. Top dressing: The boron deficiency in the soil can be sprayed with 0.1%-0.2% borax solution on the initial and middle leaves of the flower bulb, and the soil magnesium deficiency can be sprayed with 0.2%-0.4% magnesium sulfate solution 1-2 times.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
2. Fertilization technology: Under the medium fertility level, the fertilization amount per mu of broccoli in the whole growth period is 2500-3000 kg of farmyard manure (or 350-400 kg of commercial organic fertilizer), 20-23 kg of nitrogen fertilizer, 6-8 kg of phosphate fertilizer, and 11-potassium fertilizer. 14 kg, according to the crop variety and soil fertility, the fertilization amount is adjusted appropriately, the nitrogen and potassium fertilizers are divided into base fertilizer and three top dressings, and the phosphate fertilizer is used as the base fertilizer, and the fertilizer and the farmyard manure (or commercial organic fertilizer) are mixedly applied.
Base fertilizer: 2500-3000 kg of farmyard manure or 350-400 kg of commercial organic fertilizer per mu, 6 kg of urea, 13-17 kg of diammonium phosphate, 7-8 kg of potassium sulfate, 0.5 kg of borax. Top dressing: 10-11 kg of urea in the rose period, 5-6 kg of potassium sulfate; 13-15 kg of urea applied in the initial stage of flower bulb formation, 6-8 kg of potassium sulfate, and the formation of urea 10-11 potassium sulfate in the middle of the flower ball 5-6 kg. Top dressing: The boron deficiency in the soil can be sprayed with 0.1%-0.2% borax solution on the initial and middle leaves of the flower bulb, and the soil magnesium deficiency can be sprayed with 0.2%-0.4% magnesium sulfate solution 1-2 times.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
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