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1.缺氮植株瘦弱,叶色淡绿或呈黄色.叶小而薄,叶脉由黄绿色变为深紫色,茎秆变硬并呈深紫色。花蕾变为黄色,易脱落,果小而少。补救:用0.3～0.5%的尿素溶液叶面喷施。 2.缺磷早期叶片背面出现紫红色,脉间先出现一些小斑点,随后扩展到整个叶片,叶脉及叶柄最后变成紫红色。茎细长,富有纤维,叶片小,后期出现卷叶,结实延迟。补救:叶面喷0.4～0.5%的过磷酸钙浸出液。
1. Nitrogen-deficient plants are emaciated, with light green or yellow leaves, small and thin leaves, yellow-green leaves turning dark purple, hardened stems and dark purple. Buds turn yellow, easy to fall off, fruit small and less. Remedy: 0.3 ~ 0.5% urea solution foliar spray. 2. Phosphorus deficiency early on the back of the leaves appeared purple, pulse first appeared some small spots, then extended to the entire leaves, veins and petiole eventually turned purple. Stems slender, rich in fiber, leaves small, late leaf roll, stubborn delay. Remedy: foliar spray 0.4 to 0.5% superphosphate leaching solution.