一、缺氮新梢短小而细弱，叶片小、呈黄绿色．老叶呈橙红色或紫色．易早期脱落，花芽少，果实小但着色好。补救措施；早春按每株每龄０．０５公斤纯氮开沟施入，５～９月间可用０．３％－０．５％的尿素溶液做根外追肥。二、缺磷枝条细弱而分枝少．叫色变深，叶柄及叶背的... First, nitrogen-deficient shoots short and thin, small leaves, yellow-green. The old leaves are orange-red or purple. Easy to fall off early, flower buds less, fruit small but good coloring. Remedy; Early spring per plant per kilogram of pure nitrogen ditch into the application, May to September 0.3% -0.5% of the urea solution can be topdressing fertilizer. Second, lack of phosphorus branches thin branches less. Color darker, petiole and leaf back ...