缺氮　嫩叶生长受到抑制，植株细长，下部叶片失绿变黄。缺氮严重时，整个植株呈淡绿色，嫩叶小而直立，主脉呈紫色，尤其以底叶为重，果实小，植株易感染灰霉病和疫病。缺磷　植株生长缓慢，茎细弱矮小，严重时叶片下垂、卷曲，并形成暗紫色病斑，首先是叶子背面呈紫红色，然 The growth of nitrogen-deficient leaves is inhibited, the plants are slender, and the leaves of the lower part turn pale green. When the nitrogen deficiency is serious, the whole plant is light green, the young leaves are small and erect, the main veins are purple, especially the bottom leaves are heavy, the fruits are small and the plants are easily infected with gray mold and epidemic diseases. Phosphorus deficiency plant growth is slow, thin stem short, severe drooping leaves, curly, and the formation of dark purple lesions, the first is the back of the leaves were purple, however