磷钾配施对晒红烟碳氮代谢和光合效率的影响  

Effects of P and K Fertilizers on the Carbon and Nitrogen Metabolism and Photosynthetic Efficiency of Dark Sun-cured Tobacco

作　　者：方明 符云鹏 刘国顺 邓正平 田峰 吕其松 尹永强 

机构地区：[1]国家烟草栽培生理生化研究基地,郑州450002 [2]湖南省烟草公司郴州分公司,湖南郴州423000 [3]湘西自治州烟草公司烟科所,湖南吉首416000

出　　处：《中国烟草科学》2007年第2期27-30,共4页Chinese Tobacco Science

基　　金：国家烟草专卖局资助项目"湖南名晒烟深度开发利用研究"(110200101003B)

摘　　要：采用盆栽试验研究了磷钾配施对晒红烟碳氮代谢和光合效率的影响。结果表明,在氮用量相同的情况下,磷钾肥缺乏易导致硝酸还原酶(NR)活性、转化酶(INV)活性和叶绿素含量下降。在旺长期以前,不施磷肥和磷肥缺乏的处理NR/INV比值较大,不施磷钾肥和磷钾肥缺乏易导致Fv/Fo和Fv/Fm降低,并且磷素缺乏的影响程度要大于钾素缺乏的影响程度。在参试的5个处理中,以施用纯N 150 kg/hm2,N:P2O5:K2O=1:2:2.5的肥料配比有利于烟株的碳氮代谢平衡。The effects of P and K fertilizers on the carbon and nitrogen metabolism and photosynthetic efficiency of dark sun-cured tobacco were studied with a pot experiment. The results showed that with equal N rate （150kg N per hectare）, the nitrate reductase （NR） activity, invertase （INV） activity, and chlorophyll contents of fresh leaves decreased without P or K fertilizer application. The NR/INV ratio was higher in case of no or low P appfication and the values of Fv/Fo and Fv/Fm decreased in either case of no or low P and K application. The effect of P deficiency was severer than K deficiency before fast growing stage. The application of N 150 kg/hm^2 with N：P2O5：K2O=1：2：2.5 was in favor of the balance of carbon and nitrogen metabofism.

关 键 词：晒红烟 磷钾配施 碳氮代谢 光合效率 

分 类 号：S572[农业科学—烟草工业]