期刊论文

中文

核农学报

1000-8551

2016

30

4

783-791

10.11869/j.issn.100-8551.2016.04.0783

(CARS-01-34):国家水稻产业技术体系栽培与土肥岗位专家项目 (2012FJ6118):热带、亚热带气候条件下氮素利用效率的基因型差异研究项目

本校为第一机构

为探讨施氮量对超级稻产量、光合作用以及氮肥利用率的影响,以杂交稻品种两优培九、Y两优1号,常规稻品种玉香油占、黄花占为材料,采用~(15)N示踪法进行了5种施氮量处理的大田盆栽试验。结果表明,增加施氮量提高了SPAD值和光合速率,品种间表现一致。拔节期以后,SPAD值呈现高-低-高的变化趋势,叶片光合速率品种间有差异,杂交稻呈线性下降变化趋势,常规稻呈线性下降后略有回升。随施氮量增加,稻草中氮素含量杂交稻比常规稻低,分别为0.72% ~ 0.78%和0.59% ~ 0.61%;而稻谷中差异不显著。供试品种的产量、氮肥利用率对施氮量的反应分别表现为先增后稳和先增后减的非线性变化趋势,其中以施氮量为150 kg...

In order to investigate the effect of nitrogen application on super rice yield,photosynthetic characteristics and recovery efficiency of nitrogen fertilizer. A pot-cultured experiment with hybrid rice,Liangyoupeijiu,and inbred rice, Yliangyou1hao,Yuxiangyouzhan and Huanghuazhan was conducted by using~(15)N isotope tracing. The results revealed that SPAD value and photosynthetic rate increased with the increase of nitrogen rate,of which varieties was consistent. After the jointing stage,SPAD values appeared as the changing trend of the high-low-...