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烤烟硝酸盐含量与土壤养分的关系
引用本文:许自成,陈伟,肖汉乾,吴军,黄平俊.烤烟硝酸盐含量与土壤养分的关系[J].生态学报,2006,26(6):1889-1895.
作者姓名:许自成  陈伟  肖汉乾  吴军  黄平俊
作者单位:1. 河南农业大学农学院,郑州,450002
2. 湖南省烟草公司,长沙,410007
基金项目:河南省南阳市规划局资助项目;河南省高校杰出科研创新人才工程项目;河南省烟草专卖局资助项目
摘    要:采用多元统计分析方法研究了湖南烤烟叶片硝酸盐、亚硝酸盐含量与土壤养分之间的关系,结果表明:(1)典型相关分析证实烟叶硝酸盐、亚硝酸盐含量与土壤主要含氮养分(土壤全氮、碱解氮、铵态氮)及有机质含量的关系密切,与土壤其他养分含量的相关性较小,反映出在一定范围内,随着土壤含氮养分及有机质含量的增加,烟叶(亚)硝酸盐含量呈现增加的趋势,且土壤含氮养分及有机质含量与烟叶硝酸盐含量关系的密切程度高于与亚硝酸盐含量的相关;(2)根据烟叶硝酸盐、亚硝酸盐含量及其相应的植烟土壤养分(有机质、全氮、碱解氮、铵态氮)含量的大小,通过聚类分析把同一等级的烟叶样品分为高、中、低3类,不同类别相比较,有机质含量越高的土壤,其土壤全氮、碱解氮、铵态氮含量以及相应的烟叶硝酸盐、亚硝酸盐含量也越高,说明土壤有机质的高低,直接影响了土壤氮素的供应状况,进而影响了烟叶硝态氮含量的积累;(3)根据聚类分析结果建立了不同等级烟叶硝酸盐、亚硝酸盐含量高低的判别函数,可作为烟叶硝态氮含量在不同土壤肥力条件下判别归类的参考依据。

关 键 词:烤烟  硝酸盐  亚硝酸盐  土壤养分  多元统计分析
文章编号:1000-0933(2006)06-1889-07
收稿时间:2005-04-08
修稿时间:2005-04-082005-11-12

The analysis of relationships between the contents of nitrate and nitrite in flue-cured tobacco leaves and the soil nutrient conditions
XU Zicheng,CHEN Wei,XIAO Hanqian,WU Jun and HUANG Pingjun.The analysis of relationships between the contents of nitrate and nitrite in flue-cured tobacco leaves and the soil nutrient conditions[J].Acta Ecologica Sinica,2006,26(6):1889-1895.
Authors:XU Zicheng  CHEN Wei  XIAO Hanqian  WU Jun and HUANG Pingjun
Institution:1. College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China ; 2. Tobacco Corporation of Hunan Province, Changsha 410007, China
Abstract:Nitrate and nitrite in tobacco leaves are the precursors of tobacco-specific nitrosamines(TSNA).All the factors influencing contents of the above two precursors would affect the formation and accumulation of TSNA.In order to produce high quality and less harmful raw tobacco leaves,it is of great significance to reduce the TSNA content by controlling soil nutrient-supplying conditions to moderate the accumulation of nitrates and nitrites in tobacco leaves.The multivariate analysis was done on the relationships between the contents of nitrate and nitrite in flue-cured tobacco leaves and soil nutrient contents in Hunan tobacco-growing areas.(1) The correlation analysis showed that the contents of nitrate and nitrite in flue-cured tobacco leaves were highly positively correlated with the amounts of main nitrogen-containing nutrients(including total N,alkali-hydrolysable N and ammonium N) and soil organic matter,with a higher coefficient for nitrate.(2) The cluster analysis showed that the higher the amount of soil organic matter,the higher the contents of soil N-containing nutrients(total N,alkali-hydrolysable N and ammonium N) and the leaf nitrate and nitrite,indicating a direct influence of high soil organic matter contents on the soil N supply,and consequently the accumulation of nitrate N in tobacco leaves.(3) Discriminant functions,built by the cluster analysis based on the contents of nitrate and nitrite in tobacco leaves of different class levels,could be used as a reference to judge the nitrate N content in tobacco leaves under different soil fertilities.
Keywords:flue-cured tobacco  nitrate  nitrite  soil nutrients  multivariate statistical analysis
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