不同氮素形态供应对玉米幼苗生物量和氮素累积的影响  

Effect of Different N Forms on the Dry Weight and N Accumulation of Maize Seedlings

作　　者：薛艳芳[1] 张慧[1] 夏海勇[2] 王庆成[1] 温立玉 薛燕慧 于正贵 李宗新[1] 

机构地区：[1]山东省农业科学院玉米研究所,济南250100 [2]山东省农业科学院作物研究所,济南250100

出　　处：《玉米科学》2016年第6期126-130,共5页Journal of Maize Sciences

基　　金：山东省自然科学基金(ZR2015YL066);山东省农业科学院2014年度高层次人才及创新团队引进计划"青年拔尖人才";山东省现代农业产业技术体系玉米创新团队项目(SDAIT-02-07)

摘　　要：采用营养液培养方法,研究不同形态氮素供应对玉米幼苗生物量和氮素累积的影响。结果表明,登海605和鲁单981地上部植株干重均表现为硝酸钙>硝酸铵>尿素>硫酸铵处理。两个品种根系干重在硝酸钙、硝酸铵和尿素处理下无显著差异,均高于硫酸铵处理下的根系干重。两个品种地上部植株氮浓度和叶片SPAD值均表现为硝酸钙<硝酸铵<尿素<硫酸铵处理。登海605地上部氮素累积量在硝酸钙、硝酸铵、尿素和硫酸铵处理下呈下降趋势;鲁单981地上部氮累积量在不同氮素供应条件下无显著差异。与其他氮素形态相比,硝酸钙供应条件下氮素生理效率最高,最有利于促进玉米幼苗干物质累积,但造成地上部植株氮浓度的稀释效应。A solution culture experiment with two maize hybrid lines was conducted to study the effects of dif-ferent N forms on the dry weight and N accumulation of maize seedlings. The results showed that the shoot dryweight of the two maize hybrid lines was in the order, Ca（NO3）2NH4NO3Urea-N（NH4）2SO4. The root dry weight ofthe two maize hybrid lines was significantly lower with the treatment of（NH4）2SO4supply compared with the otherthree N forms, where the root dry weight was not significantly different. The shoot N concentration and leaf SPADvalues of the two maize hybrid lines were in the order, Ca（NO3）2NH4NO3Urea-N（NH4）2SO4. The shoot N accumu-lation of Denghai605 tended to decrease with the treatment orders of Ca（NO3）2, NH4NO3, Urea- N and（NH4）2SO4while that of Ludan981 was not affected by different N forms.These results suggested that compared with the otherthree N forms, the treatment of NO3-N supply signficantly incresed the internal N efficiency and further improvedthe dry weight accumulation, but resulted in N dilution effect of maize seedlings.

关 键 词：玉米 氮素形态 干物质累积量 氮素累积量 

分 类 号：S513.062[农业科学—作物学]