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茭白地上部N、P、K含量及变化趋势

JOURNAL OF HUBEI AGRICULTURAL COLLEGE(2002)

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Abstract
茭白植株地上部总体上N、K含量较高,P含量低.干物质中P、K含量的变化总体呈下降趋势,N的含量在孕茭膨大期有一个激增过程.叶片和短缩茎N、P、K的含量变化与植株N、P、K含量变化基本一致.肉质茎膨大过程中N、P、K含量均显著增加,叶片和短缩茎的N、P、K含量有不同程度的下降.叶片制造的养分首先送往短缩茎,短缩茎积累达一定程度而肉质茎尚未膨大时,叶片进行自身积累,肉质茎开始膨大后,短缩茎内养分送往肉质茎.
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Key words
zizania latifolia,above-ground
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