Salinity and sodicity are dual problems affecting soil productivity, lint yield, and fiber quality in the irrigated Pima cotton (Gossypium hirsutum L.) fields in Far West Texas. This field study evaluated the effects of S burner-treated and blended irrigation water on the sodicity and salinity levels of the root zone, cotton lint yield, and fiber quality. Results indicated that pre-study soil salinity and sodicity exceeded the threshold levels in many areas within the 9.2-ha study site.
Results after one year of irrigation with S burner-treated water
- 19% reduction in the salinity of the upper 0- to 30-cm depth
- Redistribution of salts at deeper depths
- The decrease in the average sodium adsorption ratio (SAR) of the study site. Soils decreased by 3 to 5% at 0- to 15-, 30- to 45-, and 45- to 60-cm depths
- The reduction in the SAR range for 15- to 30- and 60- to 75-cm depths indicated a redistribution of Na
- Irrigation with S burner-treated blended water increased annual cotton lint yield by 20% compared with the long-term average and fiber quality improved
- However, 1 yr of irrigation with S burner-treated water did not reduce the maximum soil salinity and SAR values below the threshold levels at different depths.
Multi-year studies are needed to confirm our results and quantify the duration required to restore soil quality, cotton yield, and fiber quality.
