施钼对烤烟叶片硝酸还原酶活性、硝态氮含量及产质的影响

摘要

Four tobacco varieties, i.e. K326, Yunyan85, CB-1 and Hongda, were chosen to study effects of foliar application of molybdenum on the NR activity, NO3--N content, and yield and quality of tobacco leaf in field experiment. Results showed that when soil available molybdenum content was 0.03 mg/kg, spraying molybdenum fertilizer can significantly enhance NR activity and reduce NO3--N content during early growing stage,especially in vigorous growing stage. Molybdenum application can increase the percentage of fine and middle grade tobacco and significantly decrease the percentage of variegated tobacco, increase yield and output value, increase content of potassium and molybdenum in tobacco leaves.%在大田条件下,对K326、云烟85、CB-1、红大4个烤烟品种进行叶面喷施钼肥处理,研究钼对烟草叶片NR活性、NO3--N含量、烟叶产量和品质的影响.结果表明:在土壤有效钼0.03 mg/kg条件下,叶面喷施钼能明显提高不同品种烟草生育前期特别是旺长期叶片NR活性,降低NO3--N含量;施钼能提高烤后烟叶中上等烟的比例,明显降低杂色烟的比例,增加烟叶产量和产值,提高烟叶含钾量和含钼量.