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玉米幼苗地上部/根间氮的循环及其基因型差异

李燕婷, 米国华, 陈范骏, 劳秀荣, 张福锁

中国农业大学植物营养系.北京 100094；山东农业大学.山东,泰安 271018

摘要

以两个玉米(Zea mays L.)自交系原引1号(YY1)和综31(Z31)为研究材料,采用盆栽土培的培养方法,在正常供氮(HN,0.15g N/kg干土)和低氮量供应(LN,0.038 g N/kg干土)培养条件下对玉米幼苗植株体内氮的循环量及其在地上部/根间的分配量进行了定量地测定、计算。结果表明,在玉米幼苗地上部/根间氮的循环量很高。低氮量供应使玉米幼苗植株吸氮量下降,根中氮的分配比例增加,同时地上部/根间氮的循环量也随之减少。与氮低效自交系Z31相比,氮高效自交系YY1幼苗中地上部/根间的氮循环量大、氮向根的分配量高,因而有利于其根系的生长,表现为根/地上部之比和总根长较高。这可能有利于其中后期对氮素的高效吸收与利用。

关键词： 玉米(Zea maysL.); 氮循环; 低氮供应; 基因型差异

Genotypic difference of nitrogen recycling between root and shoot of maize seedlings

Li Yanting, Mi Guohua, Chen Fanjun, Lao Xiurong, Zhang Fusuo

Department of Plant Nutrition,China Agricultural University.Beijing 100094；China

Abstract

Nitrogen (N) recycling between root and shoot in maize seedling was investigated by using two inbred lines (YY1 and Z31) under two N levels, normal N supply (HN, 0.15 g N/kg soil) and low N supply (LN, 0.038 g N/kg soil) in a pot experiment. N recycling diagrams were established by using the method of Amstrong and Kirkby (1979).

Key words: Maize(Zea mays L.);N recycling;low N supply;Genotypic difference

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引用本文：

李燕婷, 米国华, 陈范骏, 劳秀荣, 张福锁. 玉米幼苗地上部/根间氮的循环及其基因型差异[J]. 生理学报 2001; 53 (3): .

Li Yanting, Mi Guohua, Chen Fanjun, Lao Xiurong, Zhang Fusuo. Genotypic difference of nitrogen recycling between root and shoot of maize seedlings. Acta Physiol Sin 2001; 53 (3): (in Chinese with English abstract).