| 种植制度对土壤硝态氮及烟叶氮化物的影响 |
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| 引用本文： | 李家俊,潘文杰,李继新,王茂胜.种植制度对土壤硝态氮及烟叶氮化物的影响[J].贵州农业科学,2009,37(5). |
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| 作者姓名： | 李家俊 潘文杰 李继新 王茂胜 |
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| 作者单位： | 1. 中国烟草总公司贵州省公司,贵州,贵阳,550004
2. 贵州省烟草科学研究所,贵州,贵阳,550003 |
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| 基金项目： | 国家烟草专卖局资助项目 |
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| 摘 要： | 为了解不同种植制度对土壤硝态氮累积及烟叶氮化物的影响,选择种植玉米和烤烟长达20年的土壤为载体,在不同施氮量条件下,研究土壤剖面硝态氮的淋溶分布,以及后作烤烟总氮、烟碱和蛋白质含量.结果表明,随土层增加,土壤剖面硝态氮逐渐下降;长期连作烤烟,0～100 cm土层硝态氮含量明显高于玉米,在烤烟生长过程中,随着气温的升高,土壤硝态氮含量明显增加.单季高施氮,烟地硝态氮主要在20～40 cm的犁底层土壤中富集.烤烟连作降低了烟叶单位面积产量,同时也降低了烟叶中总氮、烟碱及蛋白质含量.烤烟连作,形成土壤中硝态氮大量富集,养分失衡,氮素利用效率下降,使烤烟生长受阻.优化种植制度、科学施肥是改良烤烟营养状况,降低硝态氮环境的重要手段.
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| 关 键 词： | 种植制度 硝态氮 土壤剖面 烤烟氮化物 |
Influences of Cropping System on Soil Nitrate Nitrogen and Tobacco Nitride |
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| LI Jia-jun,PAN Wen-jie,LI Ji-xin,WANG Mao-sheng.Influences of Cropping System on Soil Nitrate Nitrogen and Tobacco Nitride[J].Guizhou Agricultural Sciences,2009,37(5). |
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| Authors: | LI Jia-jun PAN Wen-jie LI Ji-xin WANG Mao-sheng |
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| Institution: | 1.Guizhou branch;CNTC;Guiyang;Guizhou 550004;2.Guizhou Tobacco Research Institute;Guizhou 550003;China |
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| Abstract: | In order to understand the effects of different cropping system on accumulation of soil nitrate-N and tobacco nitride,distribution of the nitrate-N on soil profile,total nitrogen,nicotine and protein in the tobacco leaf were studied in the plots with 20 years' continuous mono-cropping of corn and flue-cured tobacco based on different nitrogen level.The results show that nitrite-N in the soil profile decreases gradually with increase of soil layer depth.The nitrate-N from 0 to 100 cm soil layer is higher tha... |
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| Keywords: | cropping system nitrate-N soil profile tobacco nitride |
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