不同氮源对烤烟碳氮代谢关键酶和化学成分的影响

以6个不同氮源为材料,研究了其对4个大田生育期烤烟碳氮代谢关键酶活性和化学成分的影响。结果表明:硝酸铵和芝麻饼肥配施时,烟株的硝酸还原酶活性和转化酶活性在整个生育期内都较高,而α-淀粉酶的活性是前期减弱后期增强,这有利于干物质的积累和烟叶的适时成熟。硝酸铵和芝麻饼肥配施时,烤后烟叶的化学成分及其比值较为适宜,有利于优质烟叶的形成,其中T4处理作为氮源更有利于烤烟的生长发育。

Effects of Different Nitrogen Sources on Enzyme Activity in Carbon and Nitrogen Metabolism,and Chemical Composition in Flue-cured Tobacco

The effects of six different nitrogen sources on enzyme activity in carbon and nitrogen metabolism,and chemical composition in flue-cured tobacco were studied at four different growth stages.The results showed that the activities of nitrate reductase(NR) and invertase(Inv) were always high during the full growth period when the mixture fertilizer of ammonium nitrate and sesame cake was applied.However,the α-amylase activity showed low at early growth stage but increased at late growth stage.It was good for the accumulation of dry matter and timely maturity of tobacco leaves.Also,the chemical composition and ratio of cured tobacco were more appropriate in this situation.The high-quality tobacco could be harvested more easily based on this.Our data proved that it was better for tobacco growth when T4 treatment was used for the nitrogen source in this study.