小苏打又叫碳酸氢钠，水溶液呈碱性，分解后放出二氧化碳气体。在温室内喷施小苏打，既能防病，又可增产。许多病害如黄瓜白粉病、炭疽病、番茄叶霉病等，其病原真菌在碱性条件下很难生存。用５００倍小苏打溶解防治上述病害效果很好。另外，二氧化碳是光合作用的原料，棚室内 Baking soda, also known as sodium bicarbonate, aqueous solution was alkaline, release carbon dioxide gas decomposition. Baking baking soda in the greenhouse, both disease prevention, but also increase production. Many diseases such as cucumber powdery mildew, anthracnose, tomato leaf mold disease, the pathogenic fungi in alkaline conditions difficult to survive. With 500 times baking soda dissolved to prevent the above-mentioned disease effect is very good. In addition, carbon dioxide is the photosynthesis of raw materials, greenhouse