东北细辛根系氮、磷、钾三要素积累动态研究

Studies on the Trend of Accumulation about Three Element N、P、K in the Root of Herba Asari

对不同年生、不同生育时期东北细辛根中氮、磷、钾三要素积累动态研究。结果表明:东北细辛根中氮、磷、钾三要素的积累规律基本相同,即在生育前期、展叶至开花期,根中含量较高,开花后期到果前期根的积累水平降低,果后期各年生东北细辛积累氮、磷、钾又逐渐上升,表现为前期高、中期低、果后营养又增长的变化趋势。6年生东北细辛不同时期需要三要素比例为:5月18日17.1:0.1:1.1、6月18日12.9:0.1:0.5、7月18日15.1:0.1:1.2、8月18日12.5:0.1:0.7,为东北细辛科学合理地施肥提供了理论指导。

The paper studied the trend of three element N,P,K accumulation in different periods and years-old roots of Herba Asari. The research results showed that the three main elements in roots had the same absorbing laws ,which was N,P and K content in roots were high before growth duration and leaf expansion to abloom, The contents was lower after abloom to bear,It increased gradually at pass bearing The ratio of N：P：K that six years-old plant needed in different periods were 17.1：0.1：1.1 on 18 May ;12.9：0.1：0.5 on18 June,15.1：0.1：l.2 on 18 July,12.5：0.1：0.7 on 18 August .It offered a persuasion for the fertilization in science and in season.