Improving water use efficiency and productivity in rice crops by applying alternate wetting and drying with pregerminated broadcasting in farmers’ fields

2021 ◽  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Use Efficiency ◽  
Efficiency And Productivity

Effects of Alternate Wetting and Drying Irrigation on Yield and Water Use Efficiency of Rice

2016 ◽  
Vol 42 (7) ◽  
pp. 1026 ◽  
Author(s):  
Guang CHU ◽  
Ming-Fei ZHAN ◽  
Kuan-Yu ZHU ◽  
Zhi-Qin WANG ◽  
Jian-Chang YANG
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Use Efficiency

scholarly journals Alternate wetting and drying irrigation for rice cultivation

1970 ◽  
Vol 6 (2) ◽  
pp. 409-414 ◽  
Author(s):  
MMH Oliver ◽  
MSU Talukder ◽  
M Ahmed
Keyword(s):  
Grain Yield ◽  
Water Use Efficiency ◽  
Water Use ◽  
Ground Level ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Use Efficiency ◽  
Large Water ◽  
Level Of Significance ◽  
Boro Rice

A field experiment was conducted at the Bangladesh Agricultural University (BAU) to find out possible effects of alternate wetting and drying irrigation (AWDI) on the yield, water use and water use efficiency (WUE) of Boro rice. The experimental layout was furnitured using split-plot design (SPD) with two modern varieties (MV) of rice viz. BRRIdhan 28 and BRRIdhan 29, which received four irrigation treatments randomly and was replicated thrice. The treatments ranged from continuous submergence (T1) of the field to a number of delayed irrigations (T2, T3 and T4) denoting application of 5 cm irrigation water when water level in the perforated PVC pipe fell 10, 20 and 30 cm below ground level (G.L.), respectively. The study revealed that treatment T1 attributed by the highest total water use (122.2 cm) and the lowest WUE (58.53 kg/ha/cm) produced the highest grain yield (6.86 t/ha). Treatment T2, on the contrary, gave the second highest yield (6.58 t/ha) and consequently the second highest WUE (69.48 kg/ha/cm) indicating quite a large water saving (15 cm) compared to treatment T1. The yields in treatments T3 (6.27 t/ha) and T4 (5.86 t/ha) were significantly lower at 1% level of significance compared to that of treatment T1. No significant effect was found either for the treatment or for the varieties on the number of effective and total tillers hill-1 nor did they affect 1000 grain weight. Reduced plant height, no. of effective tillers hill-1, grain yield, straw yield, biological yield and harvest index were found with the increasing water stress. Key words: Alternate wetting and drying irrigation; Boro rice; Yield; Water use efficiency DOI: 10.3329/jbau.v6i2.4841 J. Bangladesh Agril. Univ. 6(2): 409-414, 2008

scholarly journals Water Use Efficiency and Physiological Response of Rice Cultivars under Alternate Wetting and Drying Conditions

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Yunbo Zhang ◽  
Qiyuan Tang ◽  
Shaobing Peng ◽  
Danying Xing ◽  
Jianquan Qin ◽  
...  
Keyword(s):  
Water Management ◽  
Grain Yield ◽  
Water Use Efficiency ◽  
Water Use ◽  
Field Experiments ◽  
Grain Filling ◽  
Dry Season ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Use Efficiency

One of the technology options that can help farmers cope with water scarcity at the field level is alternate wetting and drying (AWD). Limited information is available on the varietal responses to nitrogen, AWD, and their interactions. Field experiments were conducted at the International Rice Research Institute (IRRI) farm in 2009 dry season (DS), 2009 wet season (WS), and 2010 DS to determine genotypic responses and water use efficiency of rice under two N rates and two water management treatments. Grain yield was not significantly different between AWD and continuous flooding (CF) across the three seasons. Interactive effects among variety, water management, and N rate were not significant. The high yield was attributed to the significantly higher grain weight, which in turn was due to slower grain filling and high leaf N at the later stage of grain filling of CF. AWD treatments accelerated the grain filling rate, shortened grain filling period, and enhanced whole plant senescence. Under normal dry-season conditions, such as 2010 DS, AWD reduced water input by 24.5% than CF; however, it decreased grain yield by 6.9% due to accelerated leaf senescence. The study indicates that proper water management greatly contributes to grain yield in the late stage of grain filling, and it is critical for safe AWD technology.

scholarly journals Consumptive water footprints, water use efficiencies and productivities of rice under alternate wetting and drying for Kharagpur, West Bengal, India

2021 ◽  
Author(s):  
A. Biswas ◽  
D. R. Mailapalli ◽  
N. S. Raghuwanshi
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Field Experiments ◽  
Water Footprint ◽  
Water Productivity ◽  
Rice Variety ◽  
Wetting And Drying ◽  
Alternate Wetting And Drying ◽  
Use Efficiency ◽  
Consumptive Water

Abstract An experimental study was carried out with medium duration rice variety (IR 36) during kharif and rabi seasons of 2015/16 and 2016/17 to investigate the effect of alternate wetting and drying (AWD) practice on water use efficiency, productivity, and consumptive water footprints of rice. The performance of AWD practice was compared with the conventionally (CON) irrigated rice using non-weighing lysimeters. The study resulted that by managing the alternate wetting and drying up to 15 cm below the ground level, a significant reduction in water input (26–29% in kharif and 22–27% in rabi season) could be achieved under AWD. A reduction in evapotranspiration (about 6% in both kharif and rabi seasons) was also observed under AWD. Reduction in consumptive water footprint (about 2–3% in kharif and 2–5% in rabi) was obtained under AWD. Reductions in blue water footprints (7% in kharif and 4–5% in rabi) was also observed under AWD. On average, crop water use efficiency was significantly enhanced by 27–33% and 20–29% in the respective kharif and rabi seasons under AWD practice. Significant improvement in total water productivity by 29–37% and 23–35% in the respective two seasons exhibited the superiority of AWD over CON during the two years of field experiments.

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