早春保护地种植番茄,是争高产值的蔬菜品种。为了早上市,都想采取措施提早定植。如南磨房公社新村大队,二月中下旬定植的,在不加温条件下,因气候寒冷,只知早盖帘晚揭帘闭棚增温,而忽视了放风管理。结果使棚内湿度长时间过大,而地温偏低,造成有利病害发生的条件。所以,三月下旬晚疫病发生较多,不仅影响了生产,确为大棚番茄提供了菌源。 Growing tomatoes in early spring protected areas is to fight high output of vegetable varieties. In order to get to the city in the morning, we all want to take measures to plant early. For example, the New Village Brigade of South Mills Commune, which was planted in mid to late February, did not warm up, but due to the cold climate, it only knew that the curtain curtain had a warming effect at the early stage of the curtain curtain and neglected the ventilation management. As a result, the humidity in the shed is too large for a long time and the ground temperature is low, resulting in favorable conditions for the disease. Therefore, late blight late blight occurred more, not only affected the production, indeed provided a source of greenhouse tomato.