生态学杂志2024，Vol.43Issue(11)：3291-3299,9.DOI:10.13292/j.1000-4890.202411.010
干旱条件下施氮对春玉米生长发育、产量及籽粒品质的影响
Effects of nitrogen application on growth,yield,and grain quality of spring maize under drought condi-tions
摘要
Abstract
To clarify the effects of nitrogen application on the growth,yield,and grain quality of spring maize under drought conditions,an experiment was conducted under moderate drought stress(relative moisture 45％±5％)and four nitrogen addition levels of 0,120,240 and 270 kg·hm-2 at the two key developmental stages(jointing and tasseling)of spring maize(cultivar Danyu 405).We analyzed the responses of spring maize growth,yield compo-nent and grain quality to the interaction of drought and nitrogen application.The results showed that compared with the control treatment of suitable water and no nitrogen application,nitrogen application under drought during the jointing stage increased plant height,ear length,bald tip ratio,amino acids content,and crude protein content of spring maize,while decreased leaf area index,biomass,ear diameter,100-kernel weight,theoretical yield,grain water content,fat content,and starch content of spring maize.The effects of nitrogen application under drought dur-ing the tasseling stage were similar to that during the jointing stage,but with negative impact on ear length.Com-pared with the nitrogen application under drought during the jointing stage,leaf area index,bald tip ratio,grain water content,fat,starch,amino acids,and crude protein content were increased by 18.5％,116.7％,4.9％,8.6％,1.4％,8.8％,and 28.0％during the tasseling stage,respectively,while plant height,biomass,ear length,ear diameter,100-kernel weight,and theoretical yield were decreased by 2.9％,2.4％,20.1％,7.7％,4.3％,and 40.8％,respectively.With increasing nitrogen application levels under drought,plant height,biomass,ear length,bald tip ratio,grain water content,and starch content increased,while leaf area index,ear diameter,100-kernel weight,theoretical yield,fat,amino acids,and crude protein content decreased.The yield components of spring maize were negatively correlated with grain quality.Nitrogen application had an inhibitory effect on maize yield under drought,but improved grain quality to a certain extent.Our results provide scientific basis for the production management and stress control of spring maize in Liaoning Province.关键词
干旱/施氮/生长发育/产量结构/籽粒品质Key words
drought/nitrogen application/growth/yield component/grain quality引用本文复制引用
李鸣钰,陈妮娜,米娜,张淑杰,陈明欣,单楠,张巍..干旱条件下施氮对春玉米生长发育、产量及籽粒品质的影响[J].生态学杂志,2024,43(11):3291-3299,9.基金项目
中国气象局气象能力提升联合研究专项(23NLTSQ012)、辽宁省自然科学基金项目(2021-MS-358)、沈阳市科技人才项目(RC210326)、辽宁省重点研发项目指导计划(2019JH8/10200022)、国家自然科学基金项目(41705094)和辽宁省气象局指导计划项目(ZD202413)资助. （23NLTSQ012）
