论文部分内容阅读
以超级杂交早稻淦鑫203和超级杂交晚稻淦鑫688为材料,研究了施氮量对双季超级稻产量、干物质生产及氮素吸收利用的影响。结果表明,淦鑫203在施氮量为207 kg/hm2时产量最高,淦鑫688在施氮量为232.5 kg/hm2时产量最高;淦鑫203和淦鑫688分别在施氮量为234 kg/hm2和232.5 kg/hm2时的干物质生产量最大;淦鑫203在施氮量为153 kg/hm2时氮肥利用率最高,淦鑫688在施氮量为197.7 kg/hm2时氮肥利用率最高。认为淦鑫203和淦鑫688在生产中的合理施氮量可以分别确定为180～207 kg/hm2和197.7～232.5 kg/hm2。
The effects of nitrogen rate on yield, dry matter production and nitrogen uptake and utilization of double super rice in Ganxin 203 and Ganxusk 688, a super hybrid rice, were studied. The results showed that Ganxin 203 had the highest yield of nitrogen at the rate of 207 kg / hm2, Ganxin 688 had the highest yield of nitrogen at 232.5 kg / hm2, Ganxin 203 and Ganxin 688 at the nitrogen level of 234 kg / hm2 and 232.5 kg / hm2, while Ganxin 203 had the highest nitrogen use efficiency when the nitrogen application rate was 153 kg / hm2. The highest nitrogen use efficiency of Ganxin 688 under the nitrogen application rate of 197.7 kg / hm2 . The reasonable amount of N application in Ganxin 203 and Ganxin 688 can be determined as 180 ~ 207 kg / hm2 and 197.7 ~ 232.5 kg / hm2, respectively.