摘要
以晋黍9号为材料,通过分析光合色素含量、净光合速率、不同器官氮素含量及其相关系数,研究了施氮时期对糜子光合特性和各器官氮素含量的影响。结果表明,分期施氮较一次性施氮特别是花期施氮能明显提高糜子光合色素含量、净光合速率和不同器官氮素含量,花后10 d增加效果最明显,分别增加了3.33%-20.85%,1.35%-18.13%,0.99%-20.85%;随着生育进程的推进,不同处理的氮素含量基本呈现逐渐减小的变化趋势,但在糜子叶片中,N3,N4和N5处理在开花期—花后10 d期间氮素含量增加,增加幅度分别为7.20%,10.20%和9.91%;花期以后不同处理光合色素含量和不同器官氮素含量大小都表现为N4〉N5〉N3〉N2〉N1〉N0。研究表明,基肥、拔节肥、开花肥按2∶4∶4施氮,可以有效地提高净光合速率,增加光合色素含量和氮素含量。
Taking Jinshu 9 as the studied material, the paper studied the effects of different nitrogen application stages on photosynthetic characteristics and nitrogen content of different organs of broomcorn millet through the analysis of photosynthetic pigment content, net photosynthetic rate, nitrogen content of different organs and the correlation coefficient. The results showed that timing of nitrogen application could improve significantly photosynthetic pigment content, net photosynthetic rate and nitrogen content of different organs than single nitrogen application, especially when nitrogen was applied after anthesis, 10 d after anthesis was the most significantly increased, which increased by 3.33%-20.85%,1.35%-18.13%,0.99%-20.85%. With the development of the growing stages, the nitrogen content of different treatments showed a gradually decreasing trend, but in the leaves of broomcorn millet, the nitrogen content of N3, N4, N5 increased during anthesis to 10 d after anthesis, the rate of increase was 7.20%, 10.20% and 9.91%, respectively. The content of photosynthetic pigment and nitrogen in different organs of different treatments were N4〉N3 〉N5〉 N2〉 N1〉 N0 after anthesis. So base fertilizer（20%）, the jointing stage（40%）, the anthesis stage（40%）can effectively improve the net photosynthetic rate,increase photosynthetic pigment content and nitrogen content.
出处
《山西农业科学》
2016年第8期1087-1091,共5页
Journal of Shanxi Agricultural Sciences
基金
农业部国家谷子糜子产业技术体系项目(CARS-07-12.5)
关键词
施氮时期
糜子
光合色素
净光合速率
氮素含量
nitrogen application stages
broomcorn millet
photosynthetic pigment
net photosynthetic rate
nitrogen content
