期刊论文

Effects of nitrogen rate and planting density on the yield formation and the nitrogen fertilizer utilization in summer maize in Dongting Lake area

中文

湖南农业大学学报(自然科学版)

1007-1032

2019

45

2

131-137

10.13331/j.cnki.jhau.2019.02.004

国家重点研发计划项目（2016YFD0300308–01）；

本校为第一机构

为完善洞庭湖区机收夏玉米配套高产高效栽培技术,以2个宜机收玉米品种(郑单958、湘农玉27号)为材料,于2017—2018年在湖南桃源县开展大田试验,研究施氮量(150、225、300 kg/hm~2)与种植密度(60 000、 75 000、90 000株/hm~2)对夏玉米产量形成和氮素利用的影响。结果表明:夏玉米全生育期随施氮量增加延长2~4 d,适当早播可以缩短夏玉米全生育期;施氮量对夏玉米产量无显著性影响,种植密度、品种和种植密度互作、种植密度和施氮量互作对产量影响显著,施氮量宜随种植密度增大适当减少;郑单958在90 000株/hm~2与150 kg/hm~2施氮量条件下产量最高,湘农玉27号在90 000株/hm~2与225 kg/hm~2施氮量条件下产...

In order to improve the summer maize cultivation techniques for high yield and high efficiency in Dongting Lake area, field experiments were conducted in 2017-2018 with two machine-harvesting maize varieties (Zhengdan958 and Xiangnongyu No.27) as materials in Taoyuan county, Hunan province. Three nitrogen rates, 150, 225, 300 kg/hm~2, and three planting densities, 60 000, 75 000, 90 000 plants/hm~2, were used in the experiments. The results showed that the whole growth duration was prolonged 2-4 days with the increase of N rate and was shortened by the earlier sowing. Zhengdan958 and Xiangnong...