以感芝麻状斑点病大白菜品系03 B9为试材，通过钵栽及外源浇灌等方式，研究硝酸钾、硫酸钾、尿素等不同形态氮肥对大白菜芝麻状斑点病发生的影响，以及铵态氮代谢、酚类物质代谢有关物质对芝麻状斑点病发生或缓解的影响。结果表明：铵态氮肥能加重芝麻状斑点病发生；EDTA-Fe和苯丙烯酸等能增加硝酸还原酶活性或酚类物质含量，也会加重芝麻状斑点病发生；能抑制酶促褐变的抗坏血酸和对细胞膜具有保护作用的硅酸钾对缓解芝麻状斑点病作用最大。%The Chinese cabbage line 03 B9 with high sensitivity to black sesame spot was used as material to investigate the influences of different forms of nitrogen fertilizer (potassium nitrate,potassium sulfate,urea) and exogenous substances related to ammonium nitrogen or phenol substance metabolism on occurrence and al -leviation of black sesame spot on Chinese cabbage through pot culture and exogenous watering .The results showed that the ammonium nitrogen fertilizer could aggravate the occurrence of black sesame spot .EDTA-Fe and cinnamic acid could increase the activity of nitrate reductase or synthesis of phenolics , and also aggravated the occurrence of black sesame spot .Whereas the ascorbic acid inhibiting enzymatic browning and potassium silicate possessing protective action on cell membrane could alleviate the black sesame spot .
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