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烟田土壤供氮状况与上部叶烟碱含量关系的研究
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【烟草论文毕业论文下载】
摘 要 施用无机氮肥能够较大幅度提高0~20cm土壤中无机氮的含量,并维持7周左右,其中在移栽后第3周,各处理NH4+-N和NO3--N平均含量分别增加了1.09倍和10.29倍,但施用无机氮肥对提高20~40cm土壤中无机氮的含量的作用不大;在烟株移栽后0~7周,0~20cm土壤中NH4+-N和NO3--N及20~40cm土壤中NO3--N的含量随施氮量的增加而升高;施氮量与0~40cm土壤平均无机氮含量及上部叶烟碱含量的之间均存在显著的正相关性。
关键词 烟田土壤 无机氮 上部叶 烟碱
中图分类号:S 572 文献标识码:A
The study on relationships between the
concentrations of inorganic nitrogen in soil,
nicotine content of uppers of flue-cured tobacco and
nitrogen levels
LIU Wei-qun, WANG Wei-min, GUO Qun-zhao, WANG De-qin,
SUN Jian-ying, WANG Ai-wu
(Agronomy College of Henan Agriculture University,
Zhengzhou 450002, China)
Abstract: The application of inorganic nitrogen
fertilizer could raise the content of inorganic
nitrogen of 0~20 cm soil layer drastically only for
seven weeks, but affected slightly the conten
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