作物籽粒中NO<SUB>3</SUB><SUP>-</SUP>-N和NO<SUB>2</SUB><SUP>-</SUP>-N的积累与氮肥种类和数量的关系

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Relationship of NO₃^--N,NO₂^--N accumulation in some crop seeds with N fertilizers application

QIN Yuchuan

Chinese Journal of Applied Ecology . 2000, (1): 88 -91 .