Comparison between aerobic and flooded rice in the tropics: Agronomic performance in an eight-season experiment

Peng, Shaobing; Bouman, B.A.M.; Visperas, R. M.; Castaneda, A.R.; Nie, Lei; Park, Hong-Kyu

doi:10.1016/j.fcr.2005.07.007

Cited by 199 publications

(152 citation statements)

References 11 publications

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“…Li et al (2009b) also found that continuous cultivation of aerobic rice results in a substantial yield decline in greenhouse conditions. This may be due to the build-up of nematodes and soil pathogens under aerobic conditions (Ventura et al, 1981;Peng et al, 2006). Pot conditions with small soil volumes might be less buffered than field soils and the balance of underground water.…”

Section: Discussionmentioning

confidence: 99%

Effects of water management on arsenic and cadmium speciation and accumulation in an upland rice cultivar

Ouyang

et al. 2015

Journal of Environmental Sciences

133

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Pot and field experiments were conducted to investigate the effects of water regimes on the speciation and accumulation of arsenic (As) and cadmium (Cd) in Brazilian upland rice growing in soils polluted with both As and Cd. In the pot experiment constant and intermittent flooding treatments gave 3-16 times higher As concentrations in soil solution than did aerobic conditions but Cd showed the opposite trend. Compared to arsenate, there were more marked changes in the arsenite concentrations in the soil solution as water management shifted, and therefore arsenite concentrations dominated the As speciation and bioavailability in the soil. In the field experiment As concentrations in the rice grains increased from 0.14 to 0.21 mg/kg while Cd concentrations decreased from 0.21 to 0.02 mg/kg with increasing irrigation ranging from aerobic to constantly flooding conditions. Among the various water regimes the conventional irrigation treatment produced the highest rice grain yield of 6.29 tons/ha. The As speciation analysis reveals that the accumulation of dimethylarsinic acid (from 11.3% to 61.7%) made a greater contribution to the increase in total As in brown rice in the intermittent and constant flooding treatments compared to the intermittent-aerobic treatment. Thus, water management exerted opposite effects on Cd and As speciation and bioavailability in the soil and consequently on their accumulation in the upland rice. Special care is required when irrigation regime methods are employed to mitigate the accumulation of metal(loid)s in the grain of rice grown in soils polluted with both As and Cd.

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Section: Discussionmentioning

confidence: 99%

Effects of water management on arsenic and cadmium speciation and accumulation in an upland rice cultivar

Ouyang

et al. 2015

Journal of Environmental Sciences

133

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“…Rice eventually developed strong adaptation potential for fully flooded conditions across tropical to temperate environments, while wheat became well adapted to aerobic conditions mostly restricted to temperate environments. Rice, with a semiaquatic behavior, consumes about 30% of the total fresh water available for agricultural crops worldwide, which equates to a 2-to 3-fold higher consumption than other cereals such as wheat and maize (Zea mays; Peng et al, 2006). Despite a significantly lower water requirement, the potential yield of wheat in a favorable environment (9 tons ha 21 ) is comparable with the yield of fully flooded rice (9 tons ha 21 ) in the dry season at the International Rice Research Institute (IRRI; Fischer and Edmeades, 2010).…”

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confidence: 99%

Does Morphological and Anatomical Plasticity during the Vegetative Stage Make Wheat More Tolerant of Water Deficit Stress Than Rice?

et al. 2015

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District of Columbia 20005 (P.S.B.)Water scarcity and the increasing severity of water deficit stress are major challenges to sustaining irrigated rice (Oryza sativa) production. Despite the technologies developed to reduce the water requirement, rice growth is seriously constrained under water deficit stress compared with other dryland cereals such as wheat (Triticum aestivum). We exposed rice cultivars with contrasting responses to water deficit stress and wheat cultivars well adapted to water-limited conditions to the same moisture stress during vegetative growth to unravel the whole-plant (shoot and root morphology) and organ/tissue (root anatomy) responses. Wheat cultivars followed a water-conserving strategy by reducing specific leaf area and developing thicker roots and moderate tillering. In contrast, rice 'IR64' and 'Apo' adopted a rapid water acquisition strategy through thinner roots under water deficit stress. Root diameter, stele and xylem diameter, and xylem number were more responsive and varied with different positions along the nodal root under water deficit stress in wheat, whereas they were relatively conserved in rice cultivars. Increased metaxylem diameter and lower metaxylem number near the root tips and exactly the opposite phenomena at the rootshoot junction facilitated the efficient use of available soil moisture in wheat. Tolerant rice 'Nagina 22' had an advantage in root morphological and anatomical attributes over cultivars IR64 and Apo but lacked plasticity, unlike wheat cultivars exposed to water deficit stress. The key traits determining the adaptation of wheat to dryland conditions have been summarized and discussed.Among cereals, rice (Oryza sativa) and wheat (Triticum aestivum) are the most important staple food crops, and they belong to the family Poaceae. These two cereals share a common ancestor and diverged about 65 million years ago (Sorrells et al., 2003). Rice eventually developed strong adaptation potential for fully flooded conditions across tropical to temperate environments, while wheat became well adapted to aerobic conditions mostly restricted to temperate environments. Rice, with a semiaquatic behavior, consumes about 30% of the total fresh water available for agricultural crops worldwide, which equates to a 2-to 3-fold higher consumption than other cereals such as wheat and maize (Zea mays; Peng et al., 2006). Despite a significantly lower water requirement, the potential yield of wheat in a favorable environment (9 tons ha 21 ) is comparable with the yield of fully flooded rice (9 tons ha 21 ) in the dry season at the International Rice Research Institute (IRRI; Fischer and Edmeades, 2010). Hence, rice records very low water productivity compared with wheat and other dryland cereals. Because of growing concerns about water scarcity and the increased frequency and magnitude of water deficit stress events under current and future climates, increasing or even sustaining rice yield under fully flooded conditions is highly challenging. To minimize the total water requ...

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“…Peng et al [15] reported a similar contribution of TDM to yield loss under aerobic conditions. As shown in Figure 2, although maintenance of HI under upland conditions remains an important issue for certain lowland cultivars (such as Takanari and Nipponbare), the major issue is maintenance of TDM productivity.…”

Section: Discussionmentioning

confidence: 64%

“…The strategy will be similar for upland rice improvement. Peng et al [15] reported that a decrease in yield under aerobic conditions as compared to flooded conditions was caused by a decrease in TDM rather than in HI. These facts suggest the importance of dry matter productivity in breeding strategy for upland cultivars.…”

Section: Introductionmentioning

confidence: 99%

Adaptability of High-Yielding Rice Cultivars in Relation to Biomass Productivity under Moderately Water Stressed Upland Conditions

Hyoda¹,

Homma²,

Shiraiwa³

et al. 2015

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Recent studies have focused on the improvement of rice productivity under aerobic conditions for times when water resources and food production are limited. This study aimed to evaluate the adaptability of high-yielding rice cultivars to moderately water-stressed upland conditions in order to contribute breeding. A three-year field experiment in the temperate climate of Kyoto, Japan, indicated that the decrease in yield was mainly derived from a decrease in above-ground total dry matter (TDM) rather than a decrease in harvest index (HI). Although the decrease in TDM was mostly caused by a decrease in radiation use efficiency (RUE), we determined that the key to adapting high-yielding cultivars to upland conditions is intercepted radiation per day (IRPD), governed by leaf area index (LAI). Although the effect was not robust, LAI growth under upland conditions was associated with root length density. RUE was dependent on leaf water potential (LWP), indicating that a plant's ability to maintain LWP under water-stressed conditions is important. The results also suggest the necessity of a canopy analyzer to evaluate LAI, as well as an infrared radiation thermometer to evaluate RUE. Performing such measurements during breeding efforts allows us to select for genotypes that are suitable for less stressed aerobic conditions.

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Comparison between aerobic and flooded rice in the tropics: Agronomic performance in an eight-season experiment

Cited by 199 publications

References 11 publications

Effects of water management on arsenic and cadmium speciation and accumulation in an upland rice cultivar

Effects of water management on arsenic and cadmium speciation and accumulation in an upland rice cultivar

Does Morphological and Anatomical Plasticity during the Vegetative Stage Make Wheat More Tolerant of Water Deficit Stress Than Rice?

Adaptability of High-Yielding Rice Cultivars in Relation to Biomass Productivity under Moderately Water Stressed Upland Conditions

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