灌溉排水学报2017，Vol.36Issue(6)：13-17,5.DOI:10.13522/j.cnki.ggps.2017.06.003
微喷对冬小麦冠层微环境日变化及叶片水势的影响
Impact of Micro-sprinkler Irrigation on Diurnal Variation of Microenvironment of Canopy of Winter Wheat and Their Leaf Water Potential
摘要
Abstract
This paper investigated the impact of micro-sprinkler irrigation on diurnal change in microenvironment of winter wheat canopy, their leaf water potential and yield using split-plot experiment. We used the cultivar Ai-kang58 as the model plant. The results showed that irrigating 10 mm of water at late grain-filling stage could signif-icantly reduce the temperature and carbon dioxide concentration of the canopy, whereas increasing the relative hu-midity and leaf water potential of the canopy. The treatment of drip-irrigating at sowing, jointing and flowering stages, together with a further 10 mm of irrigation at late filling stage, gave the highest yield (6952.39 kg/hm2) and 1000-grain weight (45.44 g), which were significantly higher than those in other treatments. Analysis showed that the yield was negatively related to canopy temperature (P<0.01), while positively related to leaf water potential (P<0.01) and relative humidity of the canopy (P<0.05). Therefore, drip irrigation at sowing, jointing and anthesis stages with further 10 mm of irrigation at late grain-filling stage could optimize the canopy microenvironment and alleviate thermal stress, significantly increasing yield and grain weight as a result.关键词
冬小麦/冠层微环境/叶片水势/产量Key words
winter wheat/canopy microenvironment/leaf water potential/yield分类
农业科技引用本文复制引用
杨逗逗,张黛静,王艳杰,刘雪晴,刘安琪,陈倩青,李春喜..微喷对冬小麦冠层微环境日变化及叶片水势的影响[J].灌溉排水学报,2017,36(6):13-17,5.基金项目
国家"十二五"科技支撑计划课题(2013BAD07B07,2013BAD07B14) （2013BAD07B07,2013BAD07B14）
河南省重点科技攻关项目(142102110056) （142102110056）
