不同NH<SUB>4</SUB><SUP>+</SUP>/NO<SUB>3</SUB><SUP>-</SUP>比例的氮素营养对棉花氮素代谢的影响

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

DONG Hairong, LI Jincai, LI Cundong

Chinese Journal of Applied Ecology . 2004, (4): 728 -730 .