Effects of Partial Root-zone Irrigation on Physical and Chemical Property of Different Parts of Flue-cured Tobacco Leaves

[Objective] The aim was to study the effects of partial root-zone irrigation on physical and chemical property of different parts of flue-cured tobacco leaves,and provide a basis for water-saving irrigation in China.[Method] Flue-cured tobacco root-zone was irrigated in different region by pot experiment,potting soil was divided into three layers and each layer irrigated respectively,then the tobacco plants' physical and chemical property from seedling stage to the rosette stage and their root system distribution situation were observed and studied under the conditions of uneven water distribution.[Result] The results showed that under the topsoil irrigation treatment the tobacco plant roots vitality was the best,but under the subsoil irrigation treatment tobacco plants' growth vigor and yield were the biggest because of drought stress playing a certain role in tobacco plant growth vigor,and the subsoil irrigation was good at avoiding the multiplication and development of micro-organisms.[Conclusion] Partial root-zone irrigation is helpful for tobacco plants growth,and reaches the water-saving goal.