At present, greenhouse strawberry production has entered the middle and late stages. In addition to strengthening pest control and controlling temperature and humidity, the most important thing is to do a good job of post-fertilization and watering. Therefore, the following problems should be noted in production and corresponding management measures should be taken.
1. Watering irrigation is uneven. The reason is that in order to save water and reduce the humidity in the greenhouse, some farmers use drip irrigation to irrigate. This way, when irrigating, the shed temperature will not fall too fast, reducing the occurrence of strawberry diseases, thereby increasing the yield of strawberries. However, due to water quality, some of the drip is often blocked in the later period, resulting in uneven irrigation, which affects the expansion of strawberry flowering results.
Management measures: According to practical experience, in the later irrigation, it is more reasonable to change drip irrigation to flood irrigation under the membrane. The specific operation method of sub-membrane irrigation is to uncover the film between the two crucibles, and place the nozzle directly into the trench under the membrane to enlarge the water and pour it through. This method of irrigation allows water to be directed from the base of the strawberry, reducing the soil compaction caused by irrigation, and the irrigation under the membrane can also reduce the number of irrigation, saving labor and labor. Generally, the sticky soil should be watered and fertilized once every 15 to 20 days, and the sandy soil should be once every 10 to 15 days.
2. After entering the second result, some strawberries showed de-fertilization. At this time, if the nutrient supply is not strengthened, it will easily affect the yield and quality of the biloba. Moreover, the flowering period is not suitable for foliar fertilization, which increases the difficulty for fertilization.
Management measures: Increasing the application of strawberry micro-element fertilizers such as strawberry pioneer, spray Shibao, and potassium dihydrogen phosphate with irrigation to increase the soil organic matter content, supplement the missing trace elements such as manganese, molybdenum, zinc and calcium, and increase the supplemental high-efficiency phosphorus. Potassium fertilizer. The method of application is to uniformly apply the diluted high-efficiency fertilizer with water when irrigating, and generally apply 25 kg of special fertilizer per acre.
3. The occurrence of pests and diseases is more serious. With the increase of temperature, the number of pests such as powdery mildew, gray mold and aphids increased relatively, which seriously affected the quality and yield of strawberries.
Management measures: prevent in advance, hang a sticky insect board every 2 meters in the shed to reduce the occurrence of mites. The plots where the disease has occurred can be fumigated with aerosol after picking strawberries. During the specific operation, it is necessary to pay attention to the bees used for pollination to the outside of the shed to prevent damage to the bees. It is necessary to seal all the places where the wind is permeable. In the evening, the gas mist fumigant is ventilated, and the second day is ventilated.
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