Technical measures for saving fertilizer and saving water in wintering greenhouses

1. Fertilizer: From the perspective of cost-saving reduction of input and fertilization efficiency, 10,000 kilograms of chicken manure, 50 kilograms of urea, and 50 kilograms of compound fertilizer per acre are considered. This is the best amount of fertilizer for fruit and vegetable crops in winter greenhouses.

Second, water conservation: The use of drip irrigation, the relative soil moisture content of 80% is appropriate, compared with conventional furrow irrigation can also save water 70.4%, which is extremely lack of agricultural water in the saline-alkali region development of vegetable production is of great significance.

The main technical regulations:

1. Introduce fine varieties. Choose middle and late ripe tomato varieties that are resistant to low temperature, low light, disease resistance, high yield and good quality.

2, nursery, colonization. The tomato seeds were soaked in water at 55°C for 10 minutes, then slowly lowered to 25°C to 30°C and soaked for 5 hours. Remove the drain and prepare the seedlings. When 5 to 6 leaves of seedlings are to be planted, the planting density is 2,000 plants per mu.

3, water and fertilizer management. With drip irrigation, when the relative soil moisture content is less than 80%, watering is performed to a relative moisture content of 100%. The results of the general period every 20 days topdressing once, each fertilizer can be controlled in the amount of urea per acre 5 to 10 kg, compound fertilizer 5 kg.

4, temperature management. After entering the result period, do not make the minimum temperature in the shed lower than 8°C. In the daytime, it may be properly ventilated if it exceeds 30°C.

5, plant adjustments. Single stalks are used for pruning to remove lateral branches at any time to ensure ventilation and light transmission in the field. Can be topping after the 5 ear fruit, in the upper part of the ear to select a strong lateral branch to replace the original main branch, can be left to 4 to 5 ear topping.

6, preserved fruit. Spray the flowers with the appropriate concentration of tomato spirits to ensure the fruit setting rate and artificial pollination.

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