摘要
为探寻烤烟节水灌溉优化模式,采用避雨控水试验研究9种灌溉模式对烤烟不同生育期光合特性的影响。结果表明,伸根期灌溉控制下限为60%田持能显著提高该期烤烟净光合速率,并能显著促进烤烟旺长期净光合速率提高;成熟期灌溉控制下限为60%田持较70%田持更有利于提高该期烤烟净光合速率和叶片水分利用效率;推断"伸根期-旺长期-成熟期"灌溉下限为"60%-70%-60%"田持的灌溉模式在9种模式中为提高烤烟全生育期净光合速率的最优模式。
To optimize the mode of water-saving irrigation for flue-cured tobacco,a rain-proof experiment was conducted to investigate the effects of 9 irrigation modes on photosynthetic of flue-cured tobacco in different growing stages.The results showed that the net photosynthetic rates of flue-cured tobacco in root extending stage and fast growing stage were significantly increased when 60% of field capacity was controlled as the bottom line of irrigation in root extending stage.Compared with that of 70% FC,the net photosynthetic rate and leaf water use efficiency in maturity stage could be increased by the treatment of 60% FC.It can be concluded that the mode of ＂60% FC-70% FC-60% FC＂ was the best among 9 studied modes considered net photosynthetic rate of flue-cured tobacco for whole growth period.
出处
《节水灌溉》
北大核心
2012年第3期36-39,共4页
Water Saving Irrigation
基金
国家"863"计划项目(2006AA10Z271)
贵州省烟草公司科技计划项目(200705)
国家烟草专卖局科技计划项目(010199902001)
关键词
烤烟
节水灌溉模式
光合特性
生育期
flue-cured tobacco
irrigation model
photosynthetic character
growth stage
