جستجوی مقالات مرتبط با کلیدواژه « closed end furrow irrigation » در نشریات گروه « آب و خاک »

One of the important factors that reduce plant growth is the short-term water stress applied to the plant in the period of two irrigations. This research aims to investigate the relationship between crop water stress index (CWSI) of sugarcane and soil moisture under two systems of closed-end furrow irrigation (CI) and subsurface drip irrigation (SDI) at research station number one of sugarcane development research and training institute was done from July to September 2022. For this purpose, a field including ratoon 3, of the variety CP69-1062, with four replications for both irrigation systems was selected. First, the upper and lower baselines were determined for CI. Then, using these baselines, the average CWSI for SDI and CI systems was estimated for each month, separately. The highest value of CWSI for CI in September was 0.54 and for SDI in August was 0.49. Results showed that there is a high correlation between CSWI and soil moisture only in CI method for the depths of 0-30, 30-60 and 60-90 cm. The correlation between CWSI and soil moisture for CI was determined in the range of 0.60-0.70, and for SDI, in the range of 0.46-0.12. It seems that in addition to water stress, other stresses such as salinity stress caused by irrigation water and farm soil are also applied to the plant.

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.