Rice crop growth and yield as influenced by changes in ponding water depth, water regime and fertigation level

Anbumozhi, Venkatachalam; Yamaji, Eiji; Tabuchi, Toshio

doi:10.1016/s0378-3774(98)00041-9

Cited by 76 publications

(44 citation statements)

References 2 publications

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“…3;September 2011ISSN 1916-9752 E-ISSN 1916 8 decrease in rice yields under non-flooded conditions that was proportional to the level of water stress experienced by the plants. Anbumozhi et al (1998) reported increased water productivity (1.26 kg/m 3 ) in AWDI plot at 9 cm ponding depth compared to continuous flooding (0.96 kg/m 3 ). Mao Zhi (1993Zhi ( , 1996 concluded that in Southern China, AWDI for rice should be more widely used because of its potential to conserve water (20-35% reduction in water use), increase water productivity (from 0.65-0.82 kg/m 3 to 1.18-1.50 kg/m 3 after the application of AWDI), increase rice yield (15-28%), and potential to improve the root environment (i.e., soil oxygen content increased by 120-200%).…”

Section: Discussionmentioning

confidence: 94%

Achieving More with Less Water: Alternate Wet and Dry Irrigation (AWDI) as an Alternative to the Conventional Water Management Practices in Rice Farming

Chapagain¹,

Riseman²,

Yamaji³

2011

JAS

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Alternate Wet and Dry Irrigation (AWDI) is a water management system where rice fields are not kept continuously submerged but are allowed to dry intermittently during the rice growing stage. A field experiment was conducted in Chiba, Japan during the rice growing season (May-September) of 2008 to assess AWDI and continuous submerged water management practices for their effects on productivity, the surrounding environment, water savings, and Water Productivity Index (WPI). The impact of age of seedlings and plant spacing were also assessed.AWDI using the proposed irrigation schedule of 10 wet days alternated with 10 dry days used less water (29% less water) without significant reduction in grain yield (7.2 t/h) compared with conventional irrigation (7.8 t/h). Water Productivity Index was significantly higher in all sub-plots in AWDI treatments. WPI was 1.7 kg/m 3 in AWDI treatments compared to 1.3 kg/m 3 in conventional water management. Additional significant results from AWDI treatment included reduced pest and disease incidence, shortened crop cycle, and reduced lodging. However, slightly higher grain yields were observed in all sub-plots of the conventional irrigation treatment than were observed in the same combinations under AWDI. This underscores the need for further research in defining what constitutes an optimum interval for AWDI considering local soil properties, prevailing climate, and the critical periods during the rice growth cycle when the yield was particularly sensitive to moisture stress.Keywords: Alternate wet and dry irrigation (AWDI), System of rice intensification (SRI), Water savings, Water productivity index (WPI), Split-split plot design (S-SPD)

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Section: Discussionmentioning

confidence: 94%

Achieving More with Less Water: Alternate Wet and Dry Irrigation (AWDI) as an Alternative to the Conventional Water Management Practices in Rice Farming

Chapagain¹,

Riseman²,

Yamaji³

2011

JAS

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“…They added that about 40-45 percent of the water normally used in irrigating the rice crop in the dry season was saved by applying water in small quantities only to keep the soil saturated throughout the growing season, without sacrificing rice yields. [15] reported increased water productivity (1.26kg/m 3 ) in AWDI plot at 9cm ponding depth compared to continuous flooding (0.96kg/m 3 ). [16], [17] concluded that in Southern China, AWDI for rice should be more widely used because of its potential to conserve water (20-35% reduction in water use), increase water productivity (from 0.65-0.82kg/m 3 to 1.18-1.50 kg/m 3 after the application of AWDI), increase rice yield (15-28%), and potential to improve the root environment (i.e., soil oxygen content increased by 120-200%).…”

Section: Water Use Efficiencymentioning

confidence: 99%

Effect of Alternate Wetting and Drying (AWD) Irrigation for Boro Rice Cultivation in Bangladesh

Rahman¹

2014

AFF

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Abstract:A field experiment was conducted at the Bangladesh Rice Research Institute 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 plots were laid out with 2 factors RCBD combining two modern varieties of rice viz., BRRI dhan29 and BRRI hybrid2, which received four irrigation treatments randomly and was replicated thrice. The treatments ranged from continuous submergence (T 1 ) of the field to a number of delayed irrigations (T 2 , T 3 and T 4 ) denoting application of 5cm irrigation water when water level in the perforated PVC pipe fell 15, 20 and 25cm below ground level (G.L.), respectively. The study revealed that treatment T 1 attributed by the highest total water use (122.2cm) and the lowest WUE (84.34kg/ha/cm) produced the lowest grain yield (4.71t/ha). Treatment T 2 , on the contrary, gave the highest yield (5.69 t/ha) and consequently the second highest WUE (85.55 kg/ha/cm) indicating quite a large water saving (15cm) compared to treatment T 1 . The yields in treatments T 3 (5.45 t/ha) and T 4 (5.27 t/ha) were significantly lower at 1% level of significance compared to that of treatment T 1 . Significant effect was found either for the treatment or for the varieties on the number of effective and total tillers hill -1, plant height, number of effective tillers hill-1, grain yield, straw yield, biological yield and harvest index.

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“…Controlling impounded water depth is quite important for rice production [40]. In SWAT-PADDY, the water depth control method used in the past research [31] was adopted.…”

Section: Modification Of the Operation Scheme Of Irrigation And Drainmentioning

confidence: 99%

Development of SWAT-PADDY for Simulating Lowland Paddy Fields

Tsuchiya

Kato

Jeong

et al. 2016

Preprint

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The consumption of rice, which recently increases globally, leads to requirement for planning sustainable water management for paddy cultivation. In this research, SWAT model was modified to evaluate sustainability of paddy cultivation. Modifications to simulate paddy cultivation are 1) to equip with a new water balance model of impounded fields, 2) to add an irrigation management option for paddy fields, which is characterized by flood irrigation managed by farmers on a daily basis, 3) to consider puddling operation that influences water quality and infiltration rate of soil. The enhanced model, named SWAT-PADDY, was applied to an agricultural watershed in Japan as a case study. The modified model succeeded in representing paddy cultivation in the study area. However, SWAT-PADDY underestimated base flow in irrigation period. The cause of this is inferred that the modified model doesn't represent return flow of excess withdrawal of river water. In conclusion, addition of the models of impoundment and management practices in paddy fields to SWAT improved field scale simulation of water balance and irrigation in paddy fields. However, further improvement of the model on irrigation return flow process is needed to better predict hydrology of watersheds dominated by paddy irrigation.

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Rice crop growth and yield as influenced by changes in ponding water depth, water regime and fertigation level

Cited by 76 publications

References 2 publications

Achieving More with Less Water: Alternate Wet and Dry Irrigation (AWDI) as an Alternative to the Conventional Water Management Practices in Rice Farming

Achieving More with Less Water: Alternate Wet and Dry Irrigation (AWDI) as an Alternative to the Conventional Water Management Practices in Rice Farming

Effect of Alternate Wetting and Drying (AWD) Irrigation for Boro Rice Cultivation in Bangladesh

Development of SWAT-PADDY for Simulating Lowland Paddy Fields

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