作物学报2016，Vol.42Issue(12)：1844-1852,9.DOI:10.3724/SP.J.1006.2016.01844
光、氮及其互作对玉米氮素吸收利用和物质生产的影响
Effects of Light, Nitrogen and Their Interaction on Nitrogen Absorption, Utilization and Matter Production of Maize
摘要
Abstract
A field experiment was conducted using maize cultivar Yuyu 22 with three nitrogen levels (N1: 0 kg ha–1, N2: 120 kg ha–1, N3: 240 kg ha–1) and two light conditions (L1: no shading, L2: shading 14 days from the third day before tasseling) to study the effects of light, nitrogen and their interaction on nitrogen absorption and utilization, matter production of maize in 2012 and 2013. Compared with L1 treatment, L2 not only reduced the activities of nitrate reductase (NR) and glutamine synthetase (GS) in ear leaf and nitrogen accumulation in plant and grain, but also significantly reduced dry matter accumulation and declined the length of ear, kernels per row and kernels per ear, resulting in the final grain yield reduced significantly. However under L2, with increasing nitrogen application level, the activities of NR and GS in ear leaf improved and ear length, kernels per row and kernels per ear increased significantly, the grain yield eventually improved significantly. This indicates that there are significant effects of light, nitrogen and their interaction on matter production , nitrogen absorption and utilization of maize, and that nitrogen fertilizer could partially offset the impact of low-light stress on the matter production and yield of maize.关键词
玉米/氮肥水平/弱光胁迫/产量/氮素吸收与利用/物质生产Key words
Maize/Nitrogen levels/Low-light stress/Yield/Nitrogen absorption and utilization/Matter production引用本文复制引用
宋航,周卫霞,袁刘正,靳英杰,李鸿萍,杨艳,尤东玲,李潮海..光、氮及其互作对玉米氮素吸收利用和物质生产的影响[J].作物学报,2016,42(12):1844-1852,9.基金项目
本研究由国家现代农业产业技术体系建设专项(CARS-02-19)和国家公益性行业(农业)科研专项(201203100)资助。This study was supported by the China Agriculture Research System (CARS-02-19) and the Special Fund for Agro-scientific Research in the Public Interest (201203100) （CARS-02-19）
