New technology for fertilizing tomatoes in protected areas

Tomatoes are deep-rooted crops with high yields. The yield per mu can reach more than 5,000 kg. The whole growth period needs to absorb a lot of nutrients from the soil, mainly nitrogen, phosphorus and potassium. For every 1000 kg of tomatoes, 7.8 kg of nitrogen and 1.3 kg should be absorbed . Phosphorus, 15.9 kg of potassium, 2.1 kg of calcium, 0.6 kg of magnesium. The absorption ratio of nitrogen, phosphorus, potassium, calcium and magnesium in tomatoes during their lifetime is 100:26:180:74:18 . According to the principle of nutrient balance, plants can grow normally only after the absorption of various nutrients reaches physiological balance, and high yield can be achieved. The new technology of rational fertilization of tomatoes mainly includes four aspects.

First, the preparation of nutrient soil. 5 parts of garden soil, 3 parts of horse manure, 1 part of circle fertilizer, 0.75 kg of ammonium nitrate, 1 kg of superphosphate, 5 kg of plant ash per cubic meter of nutrient soil, and watered with carbendazim or chlorothalonil 100 g, evenly Spray disinfection.

The seedbed soil can be mixed according to the proportion of 4 fields of garden soil and 6 parts of organic fertilizer. 2-3 kg of ternary compound fertilizer is applied per cubic meter of soil and disinfected with carbendazim or 70% methyl thiophanate.

Second, timely planting. In addition to disinfection of the selected good seeds, soaking seeds with trace element solution to promote seed germination can play a role in early maturity and yield increase. 4 g of each of copper sulfate and zinc sulfate, and 0.2 g of each of manganese sulfate and ammonium molybdate were dissolved in 10 kg of water, and then germinated for 24 hours after soaking for 24 hours.

Third, seedbed management. Seedbed management after sowing is an important part of cultivating strong seedlings. Insulation and moisturizing and fertilizer control measures should be taken. Normal seedlings can be alternately sprayed with 0.2%-0.3% urea and 0.3% potassium dihydrogen phosphate. In addition to foliar top dressing, after the 1-2 pieces of true leaves of tomatoes are unfolded, continuous application of 800-1000 mg/L of carbon dioxide for 15-20 days can promote the tomato to become a strong seedling, and the yield increasing effect is obvious.

Fourth, skillfully apply topdressing, strong and promote fruit. The top dressing of tomatoes should not be too much. After the result, heavy fertilizer should be applied. The principle of topdressing is: from less to more, from thin to thick, the main stage is nitrogen fertilizer, and the later stage is mainly phosphate fertilizer. The decomposed thin manure water and chemical fertilizer are alternately applied. The soil drought should be light and the fertilizer should be thick, and the soil should be thick and moist. The tomatoes are usually harvested once every time. The goal of fertilization is: strong and fruit-promoting, coordinate the balance of vegetative growth and reproductive growth, promote control and combination, promote early results, more results, and fruit.

1. Lightly apply the fertilizer. Generally, 10-15 days after planting, 500 kg of manure and urine, or 10 kg of urea or 20 kg of ammonium sulfate should be applied per acre combined with watering, and carbon dioxide gas fertilizer should be applied in an appropriate amount. Sunny 1000 mg / liter, cloudy 5000 mg / liter.

2, heavy application of fruit fertilizer. Generally, 10-15 kg of diammonium or 15-20 kg of ammonium nitrate per mu , or chasing the cake fat juice or the decomposed dilute excrement, 500-800 kg per acre with water, and Apply about 10 kg of potassium sulfate.

3, clever application of fruit fertilizer. The third time is Shengguofei, which is applied after the first ear of fruit is harvested and the second ear is swollen. Generally, apply ternary compound fertilizer or 40-50 kg of diammonium phosphate per mu , or decomposed thin manure or simmered cake fertilizer liquid ( diluted 10-20 times with water ) 1000-1500 kg , with water.

4, suitable for relay fertilizer. Generally, 30-50 kg of ternary compound fertilizer is applied per acre , or 1000-1500 kg of decomposed and dilute faecal fertilizer, prolonging the result period to prevent premature aging and increase yield.

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