Evaluating water depths for high water productivity in irrigated lowland rice field by employing alternate wetting and drying technique under tropical climate conditions, Southern Taiwan

Experiments were conducted at BRRI farm Gazipur during Boro season 2010-12 to determine maximum depth of water level below ground surface in alternate wetting and drying (AWD) method. The experiment was laid out in a randomized complete block design with four irrigation treatments. The treatments of AWD method were: T1 = continuous standing water, T2 = irrigation when water level reached 15 cm below ground level, T3 = irrigation when water level reached 20 cm below ground level and T4 = irrigation when water level reached 50 cm below ground level. The experiment involved BRRI dhan28 as a test crop. The treatment T2 gave the highest grain yield (5.9 and 6.2 ton/ha) in 2010-11 and 2011-12, respectively. Maximum benefits per hectare were found Tk. 5476 and 4931 for using 807 and 880 mm water during 2010-11 and 2011-12 respectively and thus water productivity was 7.1 kg/ha-mm in T2 for both the seasons. Continuous standing (T1) water (1013 and 1100 mm) gave comparable grain yield 5.7 and 6.0 ton/ha in 2010-11 and 2011-12, respectively. Minimum water productivity was found in treatment T1 (5.6 and 5.4 kg/ha-mm) for both the seasons. Application of irrigation when water was 15 cm below soil surface was found most profitable in AWD system and the grain yield was decreased when water level was below 15 cm depth. Therefore, the recommended AWD technology could increase rice yield and save irrigation water by 25-30 percent.DOI: http://dx.doi.org/10.3329/brj.v17i1-2.20899Bangladesh Rice j. 2013, 17(1&2): 33-37

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Improving Irrigated Lowland Rice Water Use Efficiency under Saturated Soil Culture for Adoption in Tropical Climate Conditions

Water ◽

10.3390/w6092830 ◽

2014 ◽

Vol 6 (9) ◽

pp. 2830-2846 ◽

Cited By ~ 10

Author(s):

Aimé Kima ◽

Wen Chung ◽

Yu-Min Wang

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Tropical Climate ◽

Lowland Rice ◽

Saturated Soil ◽

Soil Culture ◽

Climate Conditions ◽

Use Efficiency ◽

Rice Water

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Growth and yield of lowland rice as affected by integrated nutrient management and cultivation method under alternate wetting and drying water regime

Journal of Plant Nutrition ◽

10.1080/01904167.2019.1567766 ◽

2019 ◽

Vol 42 (6) ◽

pp. 580-594 ◽

Cited By ~ 6

Author(s):

Hayat Ullah ◽

Avishek Datta ◽

Noor Ahmad Samim ◽

Siraj Ud Din

Keyword(s):

Water Regime ◽

Nutrient Management ◽

Lowland Rice ◽

Growth And Yield ◽

Integrated Nutrient Management ◽

Wetting And Drying ◽

Cultivation Method ◽

Alternate Wetting And Drying

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GRAIN YIELD PERFORMANCE OF UPLAND AND LOWLAND RICE VARIETIES UNDER WATER SAVING IRRIGATION THROUGH ALTERNATE WETTING AND DRYING IN SANDY CLAY LOAMS OF SOUTHERN MALAWI

Experimental Agriculture ◽

10.1017/s0014479714000325 ◽

2014 ◽

Vol 51 (2) ◽

pp. 313-326 ◽

Cited By ~ 6

Author(s):

Y. A. SHAIBU ◽

H. R. MLOZA BANDA ◽

C. N. MAKWIZA ◽

J. CHIDANTI MALUNGA

Keyword(s):

Water Productivity ◽

Grain Filling ◽

Water Saving ◽

Crop Water ◽

Wetting And Drying ◽

Alternate Wetting And Drying ◽

Continuous Flooding ◽

Sandy Clay ◽

Drying Up ◽

Significant Yield

SUMMARYA study was conducted to evaluate performance of two rice (Oryza sativa L.) varieties under water saving irrigation through alternate wetting and drying in sandy clay loams of Southern Malawi. The varieties, Nunkile and NERICA 4, are adapted to upland and lowland irrigated conditions, individually, and commonly grown by farmers. Four irrigation regimes were used in the study: (1) continuous flooding with surface water level kept at approximately 5 cm throughout crop duration (CFI), (2) alternate wetting and drying up to start of flowering after which continuous flooding was applied (AWD1), (3) alternate wetting and drying up to start of grain filling after which continuous flooding was applied (AWD2) and (4) alternate wetting and drying throughout the crop duration (AWD3). While seasonal crop water requirement was 690 mm, total irrigation depths were 1923.61, 1307.81, 1160.61 and 807.87 mm for the four regimes respectively. The CFI treatment used 32%, 40% and 58% more water than AWD1, AWD2, and AWD3 regimes respectively. In the same treatment order, the average yields per treatment for Nunkile were 4.92, 4.75, 4.74, and 4.47 t ha−1 with significant yield differences among CFI, AWD2 and AWD3 treatments. The average yields per treatment for NERICA 4 were 3.93, 3.75, 3.75, and 3.71 t ha−1 with significant yield differences only between CFI and all AWD treatments. Crop water productivity (CWP) was higher for Nunkile compared with NERICA 4 across all irrigation treatments, while CWP for CFI treatment was superior to all three AWD treatments grown under either variety. Thus, CWP was not increased with AWD irrigations. AWD till flowering and grain filling did not significantly differ with respect to yield and CWP. It is suggested that for similar conditions and where water is scarce, rice can be grown by AWD till grain filling as it saved more water. An important part of the research is to extend the initial results beyond the climate and soils of study.

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