The Physiological Characteristics and Root Spatial Distribution of Spring Wheat in Drip Irrigation Field

By the drip root zone moisture control tests under tube planted condition,the root physiological characteristics,root vertical distribution and yield components in different water treatments were observed for the aim of providing theoretical basis to formulate the drip irrigation system of spring wheat in South Xinjiang.The results showed:(i) Booting to filling was the key period for root growth of spring wheat,in this stage,the total root mass,total root length,total root absorption area,active absorption area and root activity reached maximum.(ii) When soil moisture was too low,root peroxidase activity decreased,proline content increased but in later stage declined too fast that let to premature decay of root.Too much water in soil,would influence the root absorption area,root activity decline and late-maturing,economic production efficiency was lower.Appropriate soil moisture(70%~75% of the soil water content) treatment could effectively promote the root growth and physiological function,the yield was the highest.Through controlling root zone moisture status of wheat by drip irrigation,it was possible to get a higher yield,and obtain higher water use efficiency.