摘要
采用田间小区试验，研究吉林省东部地区不同施氮量对高产春玉米氮素积累分配规律及产量的影响。结果表明，施氮量影响春玉米不同生育时期各生育器官氮素的阶段累积量，对累积趋势与分配规律无明显影响，不同处理对春玉米各器官氮积累量影响均表现为N300〉N450〉N150〉N0，表明适宜的氮肥用量不仅能有效促进春玉米对氮素的吸收、累积，而且能显著提高生育后期子粒氮素的积累量，从而促进高产的形成。春玉米花前是大量累积氮素的时段，其积累量占吸收总量的67％～88％。各处理间子粒产量均达显著水平，随着施氮量增加，子粒产量呈先升高再降低的趋势。综合考虑产量、养分积累分配等因素，该地区高产田块春玉米的推荐施氮量为300～330kg/hm2。
A field trial was conducted to study nitrogen accumulation characteristics and distribution dynamics and yield of spring maize under different N rates in eastern Jilin. The results showed that N application rates affected the nitrogen accumulate at different growth stages, but no influence on the tendency of nutrients accumulation and distribution regulation in plant. The effect of different N rates on nitrogen accumulation in the each organ of spring maize is： N300〉N450〉N150〉N0, which indicated that the suitable amount of N fertilizer application of the spring maize not only promoted nitrogen absorption and accumulation effectively, but improved grain nitrogen accumulation significantly in the late growth stage, thus contributing to the formation of high-yielding. The grain yield reached sig- nificant level among the treatment. Nitrogen was accumulated before anthesis, which take up the total amount of 67%- 88% of absorption. The grain yield expressed the trend of first rising and then decreasing along with the increase of N fertilizer application rate. For spring maize in eastern Jilin, for high-yielding fields in this area, with the yield and the nutrition accumulation and distribution were concerned, the nitrogen application rate at around 300-330 kg/ha was recommended under the condition of this experiment.
出处
《玉米科学》
CAS
CSCD
北大核心
2014年第1期132-136,142,共6页
Journal of Maize Sciences
基金
科技部"十二五"粮食丰产科技工程(2011BAD16B10)
科技部"十二五"粮食大面积均衡增产技术集成研究与示范(2012BAD04B02)
关键词
春玉米
产量
氮素累积
氮素分配
Spring maize
Yield
Nitrogen accumulation
Nitrogen distribution
