烟草科技2019，Vol.52Issue(12)：1-9,9.
不同浓度钼酸钠对白肋烟苗期碳氮代谢和硝酸盐含量的影响
Effects of sodium molybdate concentrations on carbon and nitrogen metabolism and nitrate content in seedlings of burley tobacco
摘要
Abstract
To clarify the mechanism of sodium molybdate on promoting the carbon and nitrogen metabolism of tobacco seedlings and its effective application concentration,a pot experiment was carried out by culturing burley tobacco TN90 in an artificial climate chambers with temperature from 22 to 28 ℃, average photosynthetic photon flux density of 800 μmol·m-2·s-1,relative humidity of 85% ,day (light) and night (dark)alternate every 12 hours. Sodium molybdate solutions at five concentrations (0,0.1%,0.5%,1.0% and 2.0% ) were sprayed on tobacco plants to study the treatment effects on the pigment content,photosynthetic rate,nitrate reductase activity,carbon and nitrogen compound contents of burley tobacco leaves. The results showed that within the concentration of 0.1%–2.0% ,the pigment content,activities of enzymes correlated with nitrogen metabolism,soluble protein content,carbohydrate content and dry matter accumulation increased and the contents of total nitrogen and nitrate decreased in the leaves after spraying sodium molybdate. At the sodium molybdate concentration of 1.0%,the dry matter accumulation and nitrogen use efficiency of the leaves raised by 30.72% and 12.42% respectively,the nitrate content decreased by 27.45%. In conclusion,within the concentration of 0.1%-2.0% , the application of sodium molybdate promotes the carbon and nitrogen metabolism and nitrogen use efficiency of burley tobacco seedlings, significantly decreases their nitrate content,especially at the concentration of 1.0%.关键词
白肋烟/钼酸钠/碳氮代谢/硝酸盐含量/氮素利用效率Key words
Burley tobacco/Sodium molybdate/Carbon and nitrogen metabolism/Nitrate content/Nitrogen use efficiency分类
农业科技引用本文复制引用
冯雨晴,李亚飞,史宏志,周骏,白若石,马雁军,林淑贞..不同浓度钼酸钠对白肋烟苗期碳氮代谢和硝酸盐含量的影响[J].烟草科技,2019,52(12):1-9,9.基金项目
上海烟草集团有限公司科技项目"烟草硝酸盐积累机理及降低硝酸盐含量调节技术研究"(TP2019-C4). （TP2019-C4）
