Research On Effects Of Alternate Partial Root-zone Irrigation On Growth And Physiological And Biochemical Characteristics In Sugarcane

In this study, sugarcane was set as the research object, irrigation methods include regulation uniform irrigation (CI), conventional drip irrigation (CDI), alternate partial root-zone irrigation (APRI) and alternate partial root-zone drip irrigation (APDI) and irrigation levels include70%-80%θf (high water),55%-65%θf (middle water) and40%-50%θf (low water). Research and analyze the effects of alternative irrigation technology on sugarcane physiological and biochemical characteristics, yield and water use efficiency by measuring the physiological and biochemical characteristics and yield under different treatment in sugarcane to provide the best reference for sugarcane irrigation methods and water. The main results are as follows:1. Compared with the CI and CDI treatment, Gs, Pn, Tr, Ci and chlorophyll content under APDI and APRI treatment were slightly lower, but the single leaf instantaneous water use efficiency is greatly improved, influence was significant at tillering; increased the SOD, proline, MDA, soluble sugar, soluble protein content and root vigor were increased under APRI and APDI treatment, while the chlorophyll and total N, P, K contents were reduced.2. Compared with the CI and CDI treatment, increased the fiber points, sucrose juice, juice gravity purity, sugar cane juice and sucrose contents were increased under APRI and APDI treatment, while the reducing sugars in juice was reduced, and middle water was helpful the quality traits. 3. Compared with the CI and CDI treatment, plant height was reduced and stem diameter was improved under APRI and APDI treatment, but the difference was not significant; sugarcane production is basically unchanged, but the irrigation water use efficiency were significantly improved40.01%,42.91%respectively,and influence is more pronounced at low water treatment.