Less nitrogen and more potassium. The demand for nitrogen, phosphorus, and potassium of zucchini was the most potassium, nitrogen and phosphorus. The temperature in spring is high. If there is too much nitrogen fertilizer, it is very easy for the squash to grow long. Therefore, we must pay attention to less nitrogen fertilizer in spring dressing, mainly high potassium compound fertilizer. High temperature and drought. Zucchini is not heat-tolerant, and high-temperature drought not only reduces the yield but also induces viral disease. The temperature in spring is relatively high. If the ventilation and watering are not timely, it is easy to cause high temperature and drought in the shed, resulting in virus disease. In addition, the temperature inside the shed is high, and the squash can be prolonged and cause melons. Therefore, we must strengthen ventilation in the spring, timely watering, to avoid the formation of high temperature and drought conditions in the shed. Under normal circumstances, the daytime temperature in the shed should be controlled between 20°C and 24°C and at night between 12°C and 14°C. Watering in time when drought occurs, and cultivating loose soil after watering. Prevent falling flowers and falling fruit. Artificial pollination is performed at 6 to 8 am each day. Male flowers are removed and the stamens are exposed. A few coats can be applied to the female flower style. The auxin treatment can use 20-25 mg of 2,4-D solution per liter or 30-50 mg per liter of phytoplankton to spray or apply freshly flowering female flowers to prevent flowering and fruit loss, and increase fruit setting rate. . Prevent too many results. In the period of fruiting melons, we must prevent too many fruits from falling into the fall. Generally, 2 leaves and 1 melon should be used for fruit thinning. In the later period, old leaves and diseased leaves should be destroyed in time to promote ventilation and light transmission, and increase production. Sensor Type Of Fire Alarm,Sensor Type Fire Alarm,Fire Alarm Sensor Type,Fire Alarm Guangdong Isafenest Co.,Ltd. , https://www.isfenest.com