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How to fertilize tomatoes
The planting area of ​​tomatoes is very large, and the planting area is also very wide. Its life is divided into three stages: the germination period, the seedling stage, and the fruiting period. Germination period. From the germination of the seeds to the development of the cotyledons until the first true leaf is revealed as the germination period. Seedling period. From the emergence of true leaves to the emergence of the first inflorescence, this period is the parallel period of vegetative and reproductive growth. Flowering result period. From the buds of the first inflorescence to the fruit harvesting, it is divided into the beginning flowering period and the flowering fruiting period. The fruiting period from the first inflorescence bud to the fruit set is a transitional stage mainly from vegetative growth to reproductive growth; the fruiting period of flowering is from the first inflorescence to the fruit harvesting and is the main period of yield formation. . The absorption of nutrients by tomatoes increases with the growth period. The absorption of nutrients in the early growth period is small. From the beginning of the first inflorescence, the nutrient uptake rapidly increases, and the nutrient uptake during the fruit period can account for 70% to 80% of the total absorption. The absorption of nitrogen, phosphorus, and potassium in tomato showed a linear upward trend. The absorption of potassium was close to one time of nitrogen. The absorption of calcium was similar to that of nitrogen. The fertilization technology for tomatoes is as follows: 1. Basal fertilizer for tomato cultivars must be reapplied to basal fertilizer, that is, based on the application of organic fertilizer, applying 35 to 40 kg of phosphatic potassium nitrate per acre. 2. Top dressing In the first ear swelling, combined with watering 20 gram of muscarinic phosphate fertilizer in Mushi Shi Tian ridge. After harvesting the first ear, 20 kg of Nitrophosphate fertilizer is applied as the phytofertilizer. In the fruit period, 20% of Tianling brand of nitrophosphate, 1% of potassium dihydrogen phosphate, 0.1% of zinc sulfate, and 0.25% of boric acid mixture are sprayed once every 7-10 days, which can significantly increase Xihong. City's output and vitamin C content.