Management method of "four Prevention" of Flowers in greenhouse

The first is to prevent "freezing". For cold-resistant flowers, grass curtains should be added at night or small sheds should be set in the shed; you can also dig a storage pool every few meters in the middle of the shed to keep warm; or spread some plant ash on the ground, which can generally increase the ground temperature by 1 ℃-2 ℃.

The second is to prevent "wet". In long-term sealing, when there are many rainy and snowy days, drainage ditches should be opened outside the greenhouse to reduce soil moisture. In addition, some plant ash can be sprinkled on the basin surface or the ground to absorb heat and increase temperature, absorb moisture and reduce humidity. At the same time, we should pay attention to tightening the greenhouse film and strictly prevent the roof from stagnant water and leakage.

The third is to guard against "qi". Fully mature organic fertilizer should be applied in the greenhouse to reduce the amount of chemical fertilizer as much as possible. In sunny and windless weather, it should be ventilated and ventilated in time to exhaust harmful gases from the shed.

The fourth is to prevent "disease". The air humidity in the greenhouse is high, so special attention should be paid to prevent the occurrence of diseases such as powdery mildew, black spot, anthrax and so on. Anthracnose can be sprayed with 75% chlorothalonil at the initial stage of the disease, powdery mildew can be sprayed with 1: 1: 140 Bordeaux liquid, and black spot can be sprayed with 1000 times of methyl topiramate. Medication in the shed should avoid sunny noon high temperature period, flowering period.