氮肥对大白菜生理障害——小黑点病发生影响的初步研究

Primary Studies on the Effects of Nitrogen Fertilizer on the Occurrence of Petiole Spot in Chinese Cabbage

本研究通过对两个大白菜品种进行氮肥施用量及不同施用方法试验,研究氮肥对大白菜生理障害—小黑点病发生的影响。试验结果表明,每公顷施用400 kg氮素肥料的处理(处理3),2个品种小黑点的发生程度均明显高于每公顷施用300 kg氮素肥料的处理(处理1,2);在氮肥施用总量相同的情况下,基施用量大的处理(处理2),两个品种小黑点的发生程度也明显高于基施用量少的处理(处理1)。品种间的小黑点发生差异还表明大白菜小黑点病的发生存在着明显的基因型间的差异。

The effects of nitrogen fertilizer on the occurrence of Petiole Spot Disorder in Chinese cabbage were studied by nitrogen fertilizer application amount and application method . The results showed, in high amount nitrogen fertilizer application treatment （treatment 3） , the occurrence of Petiole Spots Disorder is obviously serious than low amount nitrogen fertilizer application treatment （treatment 1 and 2）. With the same total amount of nitrogen fertilizer application, the occurrence of Petiole Spots Disorder is more serious with the high amount in base-application treatment （treatment 2） than the low amount in base-application treatment （treatmentl）. The results also showed, there are gene type differences on the occurrence of Petiole Spots Disorder in Chinese cabbage.