Effect of Deficit-Irrigation Plus Oxygenation on Root Growth of Super Rice
In order to improve the water use efficiency of irrigation in farmland,this study aimed to clarify the effect of deficit-irrigation plus oxygenation on the root morphological characteristics,physiological traits,agronomic traits,and yield of super rice.With Zhongzao 39 as the experimental material,three deficit-irrigation combinations(0-30 mm oxygenated water irrigation,and deficit-irrigation with 60%-80%and 80%-100%of soil volume saturation water content)were set up.Measurements were taken on indicators including the plant height,effective tiller number,plant dry weight,total root length,root surface area,root average diameter,total root tip number,root vitality,and malondialdehyde(MDA)content at the mid-tillering,late-tillering,and heading stages.Results were as follows.(1)Deficit-irrigation plus oxygenation could enhance the root vitality of super rice,delay the weakening of root vitality at the late-tillering and heading stages,and effectively reduce the MDA content of super rice roots.(2)Deficit-irrigation plus oxygenation was beneficial for increasing the effective tiller number and accumulating plant dry weight of super rice.(3)Deficit-irrigation plus oxygenation significantly increased the total root length,root surface area,root average diameter,and total root tip number of super rice.In conclusion,deficit-irrigation plus oxygenation significantly influences the growth of super rice roots,promotes water use efficiency,and facilitates rice yield formation.
super ricedeficit-irrigation plus oxygenationmorphological characteristicsyieldroot vitality
NETL
NSTL
万方数据
维普
