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氮肥分次施用比例对春玉米光合速率及产量的影响
引用本文:李二珍,靳存旺,闫洪,刘娟,王婧.氮肥分次施用比例对春玉米光合速率及产量的影响[J].中国土壤与肥料,2017(5):12-16.
作者姓名:李二珍  靳存旺  闫洪  刘娟  王婧
作者单位:1. 内蒙古五原县农牧业技术推广中心,内蒙古 巴彦淖尔,015100;2. 中国农业科学院农业资源与农业区划研究所,北京,100081
基金项目:国家重点研发计划项目(2016YFC0501306),中央级公益性科研院所基本科研业务费专项资金项目(IARRP-2014-12)
摘    要:为了探索河套灌区春玉米氮肥适宜分次施用比例,依照测土配方施肥技术原理,在全生育期施N 171kg/hm~2条件下,研究了播种前(基施)、拔节期、大喇叭口期分次施氮比例对春玉米光合速率、地上部干物质积累及产量的影响。结果表明,春玉米生育期内二次施氮可显著提高光合速率和产量;除基施外,最佳追肥时期为大喇叭口期。其中,氮肥基施和在大喇叭口期追肥比例为1∶2时春玉米可获得最高产量(13.42 t/hm~2),其光合速率最高值比同时期对照处理提高了34.11%,成熟期地上部干物质量比对照处理提高了31.47%,产量、穗粒数、千粒重也分别比对照处理提高了28.03%、15.84%、22.48%。综合考虑光合速率、地上部干物质量及产量,推荐河套灌区春玉米合理氮肥运筹方式为:基施氮肥57 kg/hm~2,大喇叭口期追施氮肥114 kg/hm~2。

关 键 词:氮肥  施肥时期  施肥比例  春玉米  河套灌区
收稿时间:2016/11/16 0:00:00
修稿时间:2017/3/20 0:00:00

Effect of application period and ratio of nitrogen fertilizer on photosynthetic and yield of spring maize
LI Er-zhen,JIN Cun-wang,YAN Hong,LIU Juan,WANG Jing.Effect of application period and ratio of nitrogen fertilizer on photosynthetic and yield of spring maize[J].Soil and Fertilizer Sciences in China,2017(5):12-16.
Authors:LI Er-zhen  JIN Cun-wang  YAN Hong  LIU Juan  WANG Jing
Abstract:This study aimed to identify the optimal application method of nitrogen fertilizer for improving nitrogen use efficiency in cereal grain production. A field experiment was conducted to investigate the effects of nitrogen application period and ratio on photosynthetic rate and yield of spring maize in Wuyuan county, Inner Mongolia, China. In this experiment, N 171 kg/hm2 was applied to a certain proportion at planting, jointing and bell-mouthed periods of spring maize based on the soil test result. The results showed that the photosynthetic rate and yield of spring maize were significant higher in the twice fertilization treat-ments than those in the once and triple fertilization treatments. Except for basal fertilizer, the recommended dressing fertilizer time was at bell-mouthed period. Among the twice fertilization treatments, the highest yield of spring maize ( 13. 42 t/hm2 ) was obtained from the treatment in which the basal/topdressing ratio was 1:2. In this treatment, the highest photosynthetic rate was increased by 34. 11% than CK, the above-ground dry matter increased by 31. 47% at maturation period, the highest yield, seed number and 100-weight of spring maize increased by 28. 03%, 15. 84% and 22. 48% compared with those of CK, respectively. Based on photosynthetic rate, above-ground dry matter and yield, N 57 kg/hm2 applied at planting plus N 114 kg/hm2 applied at bell-mouthed period should be the optimal application method for spring maize production in the Hetao irriga-tion district.
Keywords:nitrogen fertilizer  application period  application ratio  spring maize  Hetao irrigation district
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