Investigation of two irrigation methods in terms of Water Productivity and sugarcane yield in the second Ratoon

The simultaneity of sugarcane's dry season with summer heat and high evaporation makes it one of the most water-consuming plants, considering that sugarcane is cultivated in large areas in Khuzestan province Evaluation of water consumption water productivity in sugarcane cultivated lands is very important.the present study was conducted with the aim of evaluating the effect of subsurface drip irrigation on water productivity and quantitative and qualitative yield of sugarcane in the second Ratoon and comparing it with the conventional irrigation system (closed-end furrow irrigation). Experiment with a fixed working depth of 20-cm and two distances of droppers (L1=50, L2=60-cm) and two flow rates (Q1=2.3, Q2=3.6-lit/hr.). It was done with four repetitions and in the form of a block design and as a split plot. The results of variance analysis of quantitative traits showed that the highest stem height and sugarcane yield in the treatment (Q2.3, L50) were The order of 211-cm and 88-ton/ha was observed. The results of variance analysis of qualitative traits also showed that the highest yield of pure sugar with 11-ton/ha was related to the treatment (Q2.3 L50) and the lowest amount was 6.6-ton/ha. in conventional irrigation treatment (control). The highest water productivity per cane and sugar produced for the treatment (Q2.3, L50) was obtained, 4.64 and 0.58 kg/m3, respectively, which compared to the control treatment, caused There has been an increase of about 52% in water productivity. Finally, the treatment (Q2.3, L50) had the highest yield and water productivity.