Abstract: The content of N, P, K, Ca, Mg is analysed in different organs of red clover during growing season.The purpose is to reveal the accumulated capability of each organ of red clover to five elements, and the orders of N, P, K, Ca, Mg to be accumulated in different organs, and the dynamics of each element in different organs.The result shows that the accumulated capability to N is leaf>flower>root>stem, to P is flower> leaf>root>stem, both to K and Ca are leaf>flower> stem>root, to Mg is root> leaf>stem>flower.The accumulated order is N>K>Ca>Mg>P in the root, N>Ca>K>Mg>P in the stem, N>Ca >K>P>Mg in the leaf, and N>Ca>K>P>Mg in the flower.The dynamics of elements in organs have six types.

Key words: Red clover, Element content, Nutrient dynamic

摘要： 本文研究了红三叶(Trifolium pratense)各器官在不同生育期N、P、K、Ca、Mg等元素的含量,目的在于揭示其各器官对N、P、K、Ca、Mg的积累能力、对不同元素的选择性吸收以及N、P、K、Ca、Mg在各器官的季节动态。结果表明:红三叶不同器官对各元素的积累能力不同,N:叶>花>根>茎;P:花>叶>根>茎;K和Ca:叶>花>茎>根;Mg:根>叶>茎>花。不同器官对元素选择性吸收系列不同,根为N>K>Ca>Mg>P;茎:N>Ca>K>Mg>P;叶:N>Ca>K>P>Mg;花:N>Ca>K>P>Mg;红三叶是-种典型的N-Ca型植物。此外,K、P、K、Ca、Mg在根、茎、叶、花中的动态变化有6种基本类型,Ⅰ-渐增型(/)、Ⅱ-递减型(\)、Ⅲ-U型、Ⅳ-∩型、Ⅴ-增波型(～)、Ⅳ-降波型(～)。

关键词: 红三叶, 元素含量, 营养动态