不同施肥时期对春玉米土壤硝态氮含量变化的影响  

Effect of Different Application of Nitrogen Fertilizer on Soil Nitrate Nitrogen during Growth of Maize

作　　者：叶冰[1] 韩晓日[1] 战秀梅[1] 杨劲峰[1] 付时丰[1] 

机构地区：[1]沈阳农业大学土地与环境学院农业部东北土壤与环境重点开放实验室,辽宁沈阳110866

出　　处：《杂粮作物》2010年第4期302-305,共4页Rain Fed Crops

基　　金：国家科技支撑计划项目(2008BADA4B06);(2006BAD02A12);农业部公益性行业专项(200803030)资助

摘　　要：以"郑单958"为材料,探究不同施氮处理下0～60 cm春玉米生育期间土壤硝态氮含量的变化,结果表明:0～40 cm土层,施氮增加了土壤硝态氮含量,且受施氮影响较大;20～40cm土层,与不施氮相比,施氮影响了玉米生育后期该层的土壤硝态氮含量;40～60 cm土层,土壤硝态氮含量变化不明显,趋于平稳,在吐丝期以后有所不同,施氮影响了灌浆阶段硝态氮的含量。其中以N 240 kg/hm2,1/5作口肥,2/5拔节中期追施,2/5大口期追施模式最佳,追施氮肥增加了玉米生育后期土壤的供氮能力,增产显著。该研究初步探明了不同施肥处理土壤硝态氮含量影响的变化规律,为玉米合理施肥,提高氮肥利用率提供依据。Use ＇Zhengdan 958＇ as the material,explore different nitrogen application to the next 0～60 cm of soil nitrate during the spring maize content changes,the results show that ：0～40 cm soil layer,the layer of soil nitrogen increased the nitrate content of,and influenced by nitrogen;20～40 cm soil layer,and non-nitrogen than the nitrogen affects the growth period of corn late in the layer of soil nitrate content is higher than in the August 18 deal with non-nitrogen;40～60 cm layer of soil nitrate content prior to July 20 there is no significant effect by the nitrogen in the silking stage after the impact of nitrogen by the large nitrate nitrogen affected the grain filling stage of content.

关 键 词：春玉米 氮肥 土壤硝态氮 棕壤 

分 类 号：S513.062[农业科学—作物学]