Improving efficiency of water use for irrigated rice in a semi-arid tropical environment

Borrell, Andrew; Garside, A. L.; Fukai, S.

doi:10.1016/s0378-4290(97)00033-6

Cited by 178 publications

(106 citation statements)

References 15 publications

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“…Irrigation water use of rice grown on beds with intermittent irrigation until two weeks before panicle initiation, followed by continuous fl ooding, was similar to water use of dry-seeded rice on the fl at with continuous fl ooding commencing about one month after sowing . This is in contrast with fi ndings on a more permeable soil in semi-arid tropical northern Queensland where irrigation water use of rice on beds with saturated soil culture was 32% less than fl ooded rice on the fl at due to reduced percolation losses, which were considerable (Borrell et al, 1997). Studies in the USA have also shown considerable water savings with furrow irrigated rice on beds (Tracy et al, 1993;Vories et al, 2002).…”

Section: Reducing Seepage Percolation and Evaporation Losses In Rw Fmentioning

confidence: 86%

“…Water management for rice : There are numerous reports of large irrigation water savings when changing from continuously fl ooded rice to saturated soil culture to alternate wetting and drying, but yields decrease as soil water content declines below saturation (Sandhu et al, 1980;Thompson 1984, 1985;Borrell et al, 1997;Xu 1999;Bouman and Tuong 2001;Bouman et al, 2002). However, many studies throughout India and China have shown that continuous ponding is not necessary to maintain rice yields at reasonable levels (Sandhu et al, 1980;Sandhu 1987 p. 66 in Hira andKhera 2000;Chaudhary 1997;Xu 1999;Belder et al, 2004;Tuong et al, 2004).…”

Section: Reducing Seepage Percolation and Evaporation Losses In Rw Fmentioning

confidence: 99%

See 1 more Smart Citation

Water Saving in Rice-Wheat Systems

Humphreys¹,

Meisner²,

Gupta³

et al. 2005

Plant Production Science

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Section: Reducing Seepage Percolation and Evaporation Losses In Rw Fmentioning

confidence: 86%

Section: Reducing Seepage Percolation and Evaporation Losses In Rw Fmentioning

confidence: 99%

Water Saving in Rice-Wheat Systems

Humphreys¹,

Meisner²,

Gupta³

et al. 2005

Plant Production Science

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“…In general, two approaches have been taken to characterize the relationship between weather inputs and rice yields. First, in agronomic studies, usually involv-ing laboratory or experimental fields, rice plants are placed under different types of environmental stresses and physiological responses are measured (e.g., Borrell et al 1997;Homma et al 2004;Yin et al 1996). An extension of this approach is to use field data to calibrate crop models that simulate the physiological growth process.…”

Section: Methodsmentioning

confidence: 99%

Early Warning Techniques for Local Climate Resilience: Smallholder Rice in Lao PDR

Behnke

Heft-Neal

Roland‐Holst

2017

Climate Smart Agriculture

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As part of the Regional Rice Initiative Pilot Project, UNFAO has committed resources to support policy dialog and decision capacity related to climate change adaptation and mitigation in agriculture, with particular attention to food security and the rice sector in Asia and the Pacific. This initiative includes sponsorship of research to deliver information and knowledge products for policy makers to better manage climate risks to the rice sector and identify adaptation needs for the rice sector in Lao PDR. In the following pages, we report on progress of one component of this activity, econometric estimation of long term impacts that climate change can be expected to have on rice yields. The work reported here is preliminary and should not in its current form be used as a basis for policy.

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“…In the past, crop, land and water management practices were the main considerations to increase rice's water productivity (defined here as the amount of grains produced per unit water supplied by irrigation and rainfall). Several water-saving technologies have been developed that aim to reduce non-beneficial water flows from rice fields during crop growth, namely seepage, percolation and evaporation (Bouman and Tuong 2001): saturated soil culture (Borrell et al 1997), alternate wetting and drying (Tabbal et al 2002), groundcover systems (Liu et al 2005) and aerobic rice . In addition, reducing the duration of land preparation and shallow tillage significantly reduce the total water input for wetland preparation.…”

Section: Introductionmentioning

confidence: 99%

Prospects for Genetic Improvement to Increase Lowland Rice Yields with Less Water and Nitrogen

Peng¹,

Bouman²

Scale and Complexity in Plant Systems Research

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Abstract. Increasing yield potential of lowland rice remains to be the top priority in rice geneticimprovement programmes, because rice farmers' primary concern is still grain yield and world rice production has to increase by 1% annually in the next 20 years to meet the demand of the growing population. Improvements in yield potential of irrigated lowland rice were achieved under ample supply of water and nutrients. Water use efficiency (WUE) and nitrogen use efficiency (NUE) were seldom included in the breeding objectives for irrigated lowland rice. Scarcity of freshwater resources has threatened the production of the flood-irrigated rice crop, and excessive use of N fertilizer is causing environmental concerns. We have to increase lowland rice yield with less water and N. Newly developed crop management strategies have proven to be effective in increasing WUE and NUE. Several watersaving technologies such as alternate wetting and drying (AWD) and aerobic rice system have been developed to increase the water productivity of rice. However, yield penalty occurred when these watersaving technologies were practised with current varieties. New varieties have to be developed to reduce the yield loss under AWD and aerobic rice system in order to increase WUE further. Direct selection for WUE under flood-irrigated lowland conditions may have a negative impact on grain yield under watersaving strategies. Optimizing the timing and rate of N application to synchronize supply and demand of N by the crop has resulted in a great reduction in fertilizer-N input without yield loss and greater NUE. Genetic improvement of NUE has not been achieved in rice. Genotypic variation in NUE has been reported in many studies. Plant traits that are associated with high grain yield and high NUE should be identified so that breeders are able to use these traits easily as selection criteria in the breeding programme to develop N-efficient varieties without sacrificing rice yield potential. New breeding techniques such as development of F 1 hybrids, marker-aided selection, transformation and genetic engineering should be combined effectively with the empirical breeding method in order to increase rice grain yield with less water and N.

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Improving efficiency of water use for irrigated rice in a semi-arid tropical environment

Cited by 178 publications

References 15 publications

Water Saving in Rice-Wheat Systems

Water Saving in Rice-Wheat Systems

Early Warning Techniques for Local Climate Resilience: Smallholder Rice in Lao PDR

Prospects for Genetic Improvement to Increase Lowland Rice Yields with Less Water and Nitrogen

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