| 氮肥减量后移对玉米产量和氮素吸收利用及农田氮素平衡的影响 |
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| 引用本文： | 邹晓锦 张鑫 安景文. 氮肥减量后移对玉米产量和氮素吸收利用及农田氮素平衡的影响[J]. 中国土壤与肥料, 2011, 0(6): 25-29 |
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| 作者姓名： | 邹晓锦 张鑫 安景文 |
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| 作者单位： | 辽宁省农业科学院环境资源与农村能源研究所,辽宁沈阳,110161 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项，"十一五"国家科技支撵计划重点项目 |
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| 摘 要： | 田间试验研究了不同土壤氮素供应水平和底追比例对玉米籽粒产量、土壤硝态氮和农田氮素平衡的影响.与农民习惯施肥(N 240 kg·hm-2,基肥和大喇叭口追肥为1∶2)相比,氮肥减量10％(N 216 kg· hm-2)和20％ (N 192kg·hm-2)处理的玉米产量并没有降低,而氮肥利用效率显著增加.氮肥减量后移可使耕层无机氮供应较好地与作物吸收同步,降低收获期0～100 cm土层的硝态氮积累,减少氮素的田间表观损失,提高氮肥利用效率.在本试验条件下,氮肥减量20％(N 192 kg·hm-2),基追比例1∶3∶1处理的植株产量、地上部植株氮肥吸收利用率、氮肥农学利用率均较高,0～100 cm土层未出现硝态氮明显累积,氮素表观损失量最少,是最佳施氮运筹模式.
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| 关 键 词： | 施氮量 氮肥后移 玉米 产量 硝态氮 氮平衡 |
| 收稿时间： | 2011-02-28 |
| 修稿时间： | 2011-06-24 |
Effect of reducing and postponing of N application on yield, plant N uptake, utilization and N balance in maize |
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| ZOU Xiao jin,ZHANG Xin,AN Jing wen. Effect of reducing and postponing of N application on yield, plant N uptake, utilization and N balance in maize[J]. Soil and Fertilizer Sciences, 2011, 0(6): 25-29 |
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| Authors: | ZOU Xiao jin ZHANG Xin AN Jing wen |
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| Affiliation: | ZOU Xiao-jin,ZHANG Xin,AN Jing-wen(Institute of Environmental Resoures and Rural Energy Liaoning Academy of Agricutural Sciences,Shenyang 110161) |
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| Abstract: | Field experiment was conducted to investigate the effect of reducing and postponing of nitrogen fertilizer on yield,plant N uptake,soil N supply,utilization and N balance in maize.Results showed that grain yield was no significant difference with N application of 10% and 20% reducing,while the N efficiency was increased.The reducing and postponing N application could improve synchronization of soil N supply and crop demand during maize growing stage,while NO-3-N accumulation of 0~100 cm soil profile and app... |
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| Keywords: | N application postponing N application maize yield soil nitrate nitrogen nitrogen balance |
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