不同NH4+/NO3-比例的氮素营养对棉花氮素代谢的影响

应用生态学报 ›› 2004, Vol. ›› Issue (4): 728-730.

不同NH₄⁺/NO₃^-比例的氮素营养对棉花氮素代谢的影响

董海荣^1,2, 李金才¹, 李存东¹

1. 河北农业大学农学院, 保定 071001;
2. 中国农业大学农学与生物技术学院, 北京 100094

收稿日期:2002-10-25 修回日期:2003-03-25
通讯作者: 李金才
基金资助:
河北省自然科学基金资助项目(399119)

Influence of different NH₄⁺/NO₃^- ratios on nitrogen metabolism of cotton

DONG Hairong^1,2, LI Jincai¹, LI Cundong¹

Hebei Agricultural University, Baoding 071001, China

Received:2002-10-25 Revised:2003-03-25

摘要/Abstract

Abstract: The influence of different NH₄⁺/NO₃^- ratios on nitrogen metabolism of cotton was studied under controlled hydroponics.The results showed that compared with single nitrate nutrition,solutions with 25/75,50/50,75/25 and 100/0 of NH₄⁺/NO₃^- significantly increased the soluble protein accumulation in leaves and roots of cotton,and the maximum content of soluble protein in leaves and roots appeared respectively in the solution with 50/50 and 75/25 of NH₄⁺/NO₃^-.The soluble protein content in roots was increased with the increase of NH₄⁺ percentage,but was slightly less in the solution of 100/0 than 75/25,which was probably related to the excess NH₄⁺ limiting boot metabolism.With the increase of NH₄⁺ percentage,the nitrate content in petiole and the nitrate reductase activity in functional blade declined,but ammoniac nitrogen content increased in every organ of cotton.These results showed that foreign nitrogen affected the nitrogen metabolism of cotton in a different way,and the nitrogen absorption by cotton was probably related to different forms of foreign nitrogen.

Key words: Cotton, NH₄⁺, NO₃^-, Nitrogen, Metabolism

中图分类号:

S562.01

董海荣, 李金才, 李存东. 不同NH₄⁺/NO₃^-比例的氮素营养对棉花氮素代谢的影响[J]. 应用生态学报, 2004, (4): 728-730.

DONG Hairong, LI Jincai, LI Cundong. Influence of different NH₄⁺/NO₃^- ratios on nitrogen metabolism of cotton[J]. Chinese Journal of Applied Ecology, 2004, (4): 728-730.

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不同NH₄⁺/NO₃^-比例的氮素营养对棉花氮素代谢的影响

Influence of different NH₄⁺/NO₃^- ratios on nitrogen metabolism of cotton

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