番茄对多种营养元素均较敏感,极易出现营养失调症状。根据番茄植株生长的表现,可以明确断定其何种营养元素过量和缺乏,如果及时进行调节,即会保证产量和品质的提高。 一、缺素症状 (一)氮素缺乏症状: 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,茎杆变硬,富有纤维,并呈深紫色。花蕾变为黄色,易脱落,果小而少。 Tomato is more sensitive to a variety of nutrients, prone to malnutrition symptoms. According to the performance of tomato plant growth, you can clearly determine what kind of nutrient elements are excessive and lack of timely adjustment will ensure that the yield and quality improvement. First, the symptoms of deficiency (a) symptoms of nitrogen deficiency: plant thin, light green or yellow leaves, small and thin leaves, veins from yellow-green to dark purple, hardened stems, rich in fiber and dark purple . Buds turn yellow, easy to fall off, fruit small and less.