摘要
本文以济麦22为材料,研究了不同氮素形式及浓度对小麦苗期根系生长发育的影响,结果表明在促进小麦根系生长发育上,三种氮素形态(硝态氮、铵态氮、硝酸铵)的表现为:硝态氮>硝酸铵>铵态氮。对于水培生长的小麦幼苗来说,硝态氮更有利于其根系生长,且当硝态氮浓度为1 mmol‧L-1时,根系生长最好。而后研究了不同浓度硝态氮对小麦抗旱性的影响,发现适当提高硝态氮浓度可以促进根系的生长发育,增加小麦叶片含水量,使小麦对干旱有更强的抵抗力。上述结果为农业生产上通过合理施用氮肥以培育小麦壮苗及提高小麦的抗旱性提供了理论依据,并为进一步研究小麦吸收氮素的分子机理奠定了基础。
The effects of different nitrogen forms and concentrations on the growth of wheat seedling root were studied using wheat variety Jimai22.The result showed that the order of three kinds of nitrogen forms(KNO3、(NH4)2SO4,NH4NO3)in promoting wheat root growth and development was:KNO3>NH4NO3>(NH4)2SO4.The optimal concentration of nitrate was 1 mmol‧L-1.Then we investigated the drought tolerance of wheat seedling grown on media with different concentrations of nitrate.The results revealed that increasing the concentration of nitrate can boost the root growth and improve the leaf water content resulting in enhanced drought tolerance.These results provided a theoretical basis for improving the root growth and drought tolerance through rational application of nitrogen fertilizer in wheat production and further study of nitrate regulation in wheat.
作者
卢毅
董放
田田
戴爱斌
齐盛东
LU Yi;DONG Fang;TIAN Tian;DAI Ai-bin;QI Sheng-dong(State Key Laboratory of Crop Biology,College of Life Sciences/Shandong Agricultural University,Tai’an 271018,China;School of life sciences,Henan University,Kaifeng 475001,China;Shandong Institute of pomology,Tai’an 271018,China;Dongying Municipal Bureau of Agricultrual and Rural Affairs,Dongying 257091,China)
出处
《山东农业大学学报（自然科学版）》
北大核心
2022年第1期39-45,共7页
Journal of Shandong Agricultural University：Natural Science Edition
基金
国家自然科学基金(31902100)
山东省高等学校科技计划项目(J18KA145)。
关键词
氮素
小麦
根系发育
抗旱性
Nitrogen
wheat
root grown and development
drought resistance
