Irrigation management techniques with anaerobic baffled reactor effluent: effect on rice growth, yield and water productivity

Abstract

The study evaluated the effect of irrigation management techniques using anaerobic baffled reactor (ABR) effluent on the growth and yield of rice. It was hypothesized that irrigation techniques with ABR effluent have a significant effect on the growth, yield of rice, water productivity (WP) and water balance (WB). The experimental setup was a randomized complete block design for 2017 and 2018 cropping seasons, three treatments each with three replications. The treatments were alternating wetting and drying (AWD), continuous flooding irrigation (CFI) and wetting without flooding (WWF). The effect of irrigation management techniques was significant (P < 0.05) for the 2017 season but insignificant (P > 0.05) in 2018 on the yield. The effect of irrigation treatments on WP was significant (P < 0.05). The effects were not significant (P > 0.05) on the plant height, leave area index (LAI) and number of tillers per plant. However, the effect was significant (P < 0.05) on the number of panicles per plant. The effects of irrigation treatments were significant (P < 0.05) on number of irrigation, amount of irrigation, total water use and daily field WB. In conclusion, the result proved the acceptability of the hypothesis. AWD irrigation with ABR effluent should be encouraged among rice farmers.

Effects of Bacillus subtilis and Saccharomyces cerevisiae inoculation on soil bacterial community and rice yield under combined irrigation with reclaimed and fresh water

“…With an increased salinity, the rice yield and stem weight decreased significantly [56] . Moreover, the application of bacterial agents can improve the resistance of crops to salt stress [57,58] , Busari [59] also confirmed the fact that alternating between wetting and drying irrigation using anaerobic baffled reactor (ABR) effluent domestic sewage (The reclaimed water used in this experiment also comes from domestic sewage) decreased plant height, leave area index (LAI), and the number of filled grains per panicle, while increasing the number of panicles per m 2 , the number of tillers per plant, the number of filled grains per m 2 , and the grain yield. The dry weight of the roots after treatment with J1, J2, and J3 was higher than in J0.…”

Alternate Wetting and Drying (AWD) on Rice Irrigation

“…AWD irrigation has been widely used worldwide and is one of the popular methods in paddy cultivation. AWD has promoted water productivity in rice irrigation relative to conventional irrigation (Akter et al, 2018;Biswas et al, 2021;Busari et al, 2019;Chidthaisong et al, 2018). In addition, Norton et al (2017) ascertained in their report that AWD increased the total grain mass due to the high number of productive tillers.…”