植物营养与肥料学报2014,20（2）：290-297 Journal of Plant Nutrition and Fertilizer
doi=10.11674/zwyf.2014.0204
氮高效玉米自交系的筛选指标及其子粒氮素
营养特性分析
翟文芳，高聚林*，于晓芳，胡树平，苏治军，王志刚，孙继颖，谢
（内蒙古农业大学农学院，呼和浩特010019）
摘要：在高氮和低氮条件下，对高产氮高效型、高产氮低效型、低产氮高效型、低产氮低效型四个类型玉米自交系氮效率筛选指标进行分析。结果表明，施用氨肥后，高产氮高效型和高产氮低效型根系氨素转移量增加，对子粒氨的贡献率提高。低氮下高产氮高效型根系氮转移量对子粒氮的贡献率高于高产氮低效型，高氮和低氮条件下两种基因型子粒氮主要来源于粒重形成阶段营养体的转移，而氮素不足时高产氮高效型后期根系氮素吸收能力比高产氮低效型更具有优势。无论高氮还是低氮条件下，对高产氮高效基因型的筛选，子粒吸氮量和吐丝期茎叶总氮量是重要的辅助筛选指标。
关键词：玉米；自交系；氮高效；筛选
中图分类号：Q945.12
文献标识码：A
文章编号：1008505X(2014)02-0290-08
The index for the screening of N-efficient inbred lines of maize and their
Nnutritionpeculiarityinseedproduction
CUI Wen-fang, GAO Ju-lin', YU Xiao-fang, HU Shu-ping, SU Zhi-jun, WANG Zhi-gang, SUN Ji-ying, XIE Min
( College of Agronomy, Inner Mongolia Agricultural Uninersity, Huhhot O10019, China)
Abstract : The nutrient indices of four different N -efficiency maize inbred lines : high yield with high N efficiency , high yield with low N efficiency , low yield with high N efficiency and low yield with low N efficiency , were studied under high and low nitrogen fertilizer application rates . The results show that the N contents in stems and leaves and their transfer amount to grains are important indices for the screening of high yield with high N -efficiency genotype of maize, regardless of the N fertilizer application rates . The application of N fertilizer can increase the absorption and transfer of N from vegetative parts to grains . The contribution rate to grain N accumulation transferred from the vegetative parts are higher than from the roots at anthesis stage in all genotypes of maize under both high and low N application rates , but the N absorption amount and transfer rate from roots to grains are higher with high yield with high N-efficiency genotype when N is applied at low level . The contribution rate to grain N accumulation through the transfer from vegetative parts in high yield with high N efficiency type is higher than that in high yield with low N-efficiency type at both N application conditions . Therefore, both the N ahsorb amount and the total N content in the stem and leaf are important indices for the screening of high yield with high N -efficiency genotype of maize. Key words corn inbred line nitrogen-efficiencyscreening
收稿日期：2013-03-08
接受日期：2013-08-20
基金项目：国家自然科学基金项目（31260300）；国家粮食丰产科技工程（2011BAD16B13，2012BAD04B04，2013BAD07B04）：国家玉米产业技术
体系蒙西综合试验站（CARS-02-63）;973计划项目（2009CB118601）资助。
作者简介：崔文芳（1977一），女，内蒙古呼伦贝尔人，博士研究生，主要从事玉米生理生态研究。E-mail：cui.wenfang@163.eom
*通信作者E-mail：gaojulin@yahoo.com.cn