【作者】 刘卫群； 陈良存； 陈旭初； 王卫民；

【Author】 LIU WEI-QUN, CHEN LIANG-CUN, CHEN XU-CHU, and WANG WEI-MIN Henan Agricultural University, Zhengzhou 450002, China

【机构】 河南农业大学；

【摘要】 采用盆栽通过对烟株生长后期叶片硝酸还原酶(NR)和转化酶(Inv)活性的测定,研究了不同基追比和追肥时期对烟株生长后期碳氮代谢强度转化的影响,结果显示:与对照相比,NR和Inv活性对追肥时期和基追比比较敏感,追肥时期和基追比能够提高下部叶NR和Inv活性:降低上部叶NR活性,提高成熟前期上部叶Inv活性,降低后期Inv活性,表明追肥能够提高下部叶的碳氮代谢强度,加速上部叶的氮碳代谢进程。更多还原

【Abstract】 the nitrate reductase and invertase activity were detect to study the effect of dressing on the level of carbon and nitrogen by the pot test at later growth stage of tobacco, the results indicated that: the level of carbon and nitrogen adopting 7:3 of base fertilizer to dressing was beneficial to improve the quality of supper-leaf and lower-leaf while dressing time is 20 days or 20 days and 40 days after transplanting physiological characteristics and its response to dressing are studied with the cultivar Nc89 (Nicotiana tabacum L。) by pot experiment, the results indicated that: the nitrate reductase(NR) and invertase activity always decreased; dressing enhances the nitrate reductase activity of lower-leaf and decrease it of supper-leaf, dressing can raise invertase activity, but supper-leaf displayed no perceptible correlation with dressing rate, abasing the proportion of NR and lnv of lower-leaf and increasing the proportion of supper-leaf.更多还原