Studied the Effect of Deficit Irrigation and Nitrogen Nutrition on Systems in Maize Leaf
A pot experiment was conducted on spring maize to investigate the effect of the water deficit period and nitrogen nutrition on leaf antioxidant system of malondialdehyde (MDA), peroxidase (POD) and superoxide dismutase (SOD) activity. The study showed that regulated deficit irrigation (RDI) increased MDA, at the same time it decreased POD and SOD activity. Nitrogen application ensured high levels of SOD and POD before heading. MDA content was negatively correlated with nitrogen rate and irrigation, and that reached its peak at the later stage of jointing, then decreased. POD activity reached its maximum at terminal jointing stage, decreased at heading stage. Water deficit significantly reduced POD activity, with a significant compensation effect after water covered. Although nitrogen application enhanced POD activity, while POD of heading decreased under the condition of NH and DI in heading stage or whole growth period. SOD activity trend was consistent with that of POD. Compensation effect of water covered was best for physiology and biochemistry under water deficit at seedling stage, and deficit irrigation at jointing stage was better. High nitrogen treatment was not suitable for deficit irrigation at heading stage.
Deficit irrigation Nitrogen rate maize leaf Malondialdehyde Peroxidase Superoxide dismutase
Xiaogang Liu Fucang Zhang
Faculty of Modern Agricultural Engineering Kunming University of Science and Technology Kunming, Chi Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Educ
国际会议
哈尔滨
英文
38-41
2012-06-16（万方平台首次上网日期，不代表论文的发表时间）