The integrated water and fertilizer technology commonly used in strawberries is drip fertigation technology, which can reduce surface evaporation, reduce greenhouse humidity, reduce the occurrence of pests and weeds, and avoid direct contact of strawberries with soil to improve the appearance and quality of strawberries. Technical content irrigation pipeline laying. Before planting, it is necessary to prepare soil, apply fertilizer, make sputum, drip irrigation, and install fertilizer. Lay one or two drip irrigation tubes (drip irrigation belt or one micro-spray belt) at the middle of the two rows of strawberry plants. Fertilizer preparation. According to the requirements of the fertilizer application, first dissolve the fertilizer in water, pour the fertilizer into the differential pressure fertilization tank, or pour it into an open container and inhale it with a venturi fertiliser. Differential pressure fertilization method: The fertilizing tank is connected in parallel with the pressure regulating valve on the main pipe, and the inlet pipe of the fertilizing tank should reach the bottom of the tank. Before fertilizing, water is poured for 20 to 30 minutes. When fertilizing, tighten the can lid and open the inlet valve of the tank. After filling the tank with water, open the outlet valve of the tank to adjust the pressure difference to keep the fertilization speed normal. Fertilization time is generally controlled at 40 to 60 minutes to prevent uneven or insufficient fertilization. Venturi fertilization method: The venturi is connected in parallel with the valve on the main pipe. Pour the previously dissolved fertilizer into an open container, and put the tip of the venturi into the fertilizer. The tip should have a filter. Do not place the tip on the bottom of the container. Open the valve on the suction pipe and adjust the valve on the main pipe to make the suction pipe absorb the fertilizer evenly and stably. Drip irrigation scheme: The principle of drip irrigation and fertilization must adhere to a small number of times. Transfer to the flowering period every 5 to 7 days, drip irrigation once, each drip irrigation 8 ~ 10 square / acre; flowering to the expansion period every 5 to 7 days drip irrigation, each drip irrigation 5 ~ 8 square / acre; harvesting period every 6 ~8 days drip irrigation, each drip irrigation 6 ~ 8 square / acre. Irrigation operation: When irrigation, the valve on the fertilization tank should be closed, the control valve of the drip irrigation system branch pipe should be completely opened, and irrigation should be carried out according to the drip irrigation scheme. Turn off the power at the end of the irrigation and immediately close the control valve. The drip irrigation depth is generally 30 cm. The principle of drip irrigation is a small number of times, do not extend the drip irrigation time to achieve the purpose of multi-irrigation.
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