南京农业大学学报2013，Vol.36Issue(3)：1-7,7.DOI:10.7685/j.issn.1000-2030.2013.03.001
氮素营养水平对大垄双行膜下滴灌玉米花粒期叶片衰老特性及产量的影响
Effects of nitrogen on leaf senescence and yield of maize under-mulch-drip irrigation in double lines at one width ridge
摘要
Abstract
The effects of different levels of nitrogen nutrition on leaf senescence and yield were studied under-mulch-drip irrigation.The results showed that the contents of chlorophyll and protein and the activities of protective enzymes(SOD,POD,CAT and APX) were enhanced,and the contents of MDA,H2O2,O2-production rate decreased with the increase of nitrogen fertilizer.When 400 kg· hm-2 nitrogen application amounts was used,parameters mentioned above of leaves from different positions showed the opposite trend.Under the same nitrogen fertilizer level and stage,the sequence of chlorophyll and protein content,POD,CAT,APX activities was:ear leaf,5th leaf above ear,5th leaf below ear.From the flowering stage to 10 days,the order of SOD activity was ear leaf,5th leaf above ear,5th leaf below ear.While the order was 5th leaf above ear,ear leaf,5th leaf below ear at later flowering stage.There was close relationship between leaf senescence,nitrogen nutrition and kernel yield.We should apply nitrogen reasonably,and lacking and excessive nitrogen could cause leaf senescence and yield reduction.关键词
玉米/氮素/膜下滴灌/生理特性Key words
maize / nitrogen / under-mulch-drip irrigation / physiological mechanism分类
农业科技引用本文复制引用
黄海,吴春胜,胡文河,徐百军,王思远,谷岩..氮素营养水平对大垄双行膜下滴灌玉米花粒期叶片衰老特性及产量的影响[J].南京农业大学学报,2013,36(3):1-7,7.基金项目
国家粮食丰产工程项目(2011BAD16B10,2012BAD04B02) （2011BAD16B10,2012BAD04B02）
吉林省财政厅农业综合开发科技示范项目(20110530) （20110530）
吉林省现代农业产业技术体系建设项目(201203) （201203）
吉林省科技支撑计划项目(20100210) （20100210）
吉林省科技厅科技发展计划项目(20116030) （20116030）
科技部农业科技成果转化资金项目(2011GB2B100006) （2011GB2B100006）
