The area under cultivation is large and the area under cultivation is wide. The lifetime of tomatoes is divided into gestation periods, nursery periods and flowering outcomes。
The gestation period runs from seed to leaf expansion to the first leaf appearance。
The seedling period is from the real leaf to the first bouquet. This period is a parallel period between nutritional growth and reproductive growth, which can produce healthy, age-appropriate seedlings under conditions of sufficient light, good ventilation and full nutrition。
The flowering result period runs from the first curvature to the fruit harvest. It is divided into a start-up and a start-up period. Precinct period: from the first curvature to the sitting fruit, the transition is mainly from nutritional to reproductive growth; the flowering result period: the main period during which production is formed is from the first chorus to the fruit harvest。
Absorption of nutrients is small in the pre-birth period, with a rapid increase in nutrients from the beginning of the first bouquet, to 70-80 per cent of total nutrients in the circulatory period. Absorption of tomatoes to nitrogen, phosphorus and potassium is on a straight upward trend, the absorption of potassium is nearly double that of nitrogen, the absorption of calcium is similar to that of nitrogen, and the presence of calcium in the ridges of phosphate nitrate (potassium) fertilizer can prevent the occurrence of stylosis。
Tomato fertilization techniques are:
1. Base fat. Tomato field cultivation requires the re-application of base fertilizer, i. E. 35-40 kg of potassium nitrate per acre based on application of organic fertilizer。
2. Catch fat。
(1) 20 kg of phosphorus fertilizer applied in combination with acre water when the first ear swelled。
(2) following harvest of the first fruit, the acre is followed by 20 kg of nitrite fat on the ridge。
(3) a significant increase in yields and vitamin c levels can be achieved every 7 to 10 days in the pristine season with 20% ridges of phosphate fertilizer, 1% of potassium phosphate, 0. 1% of zinc sulphate and 0. 25% of a mixture of boron acid. (winter winter)
