随着保护地蔬菜连年种植,蔬菜长势越来越差,病害越来越多,特别是蔬菜生理性病害,逐年加重。施入的肥料增多了,但蔬菜不仅没有长的更好,反而色淡叶小,表现出缺肥症状,蔬菜产量以及经济效益呈 With the continuous planting of vegetables in protected areas, vegetables grow worse, more and more diseases, especially vegetable physiological diseases, increasing year by year. The amount of manure applied increased, but not only the vegetables did not grow better, but the color of leaves was small, showing lack of fertilizer, vegetable yield and economic efficiency was