Drought response of dry-seeded rice to water stress timing and N-fertilizer rates and sources

Castillo, E.; Tuong, To Phuc; Singh, Upendra; Inubushi, Kazuyuki; Padilla, J. L.

doi:10.1111/j.1747-0765.2006.00064.x

Cited by 28 publications

(14 citation statements)

References 11 publications

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“…Though water-related parameters to quantify the osmotic stress were not measured, we assumed that the effect of osmotic stress could adequately mimic that of drought at a similar magnitude of osmotic potentials, as concluded by previous authors (e.g., Kauffman and Eckard, 1971;Michel, 1971;Attree and Fowke, 1993). This assumption was supported by the similarity between findings in this study and those of previous authors (Wopereis et al, 1996;Tuong et al, 2002;Castillo et al, 2006). The higher N concentration in the stressed plants suggests that osmotic stress limited growth more than N uptake by the plants.…”

Section: Discussionsupporting

confidence: 92%

Response To Salinity In Rice: Comparative Effects Of Osmotic And Ionic Stresses

Castillo

Tuong

Ismail

et al. 2007

Plant Production Science

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: The effects of the osmotic component of salt stress on rice cultivar IR64 were examined. Treatments were four combinations of two levels of osmotic stress at two developmental stages: medium-and highlevel stress applied at the vegetative and reproductive stages using salt (NaCl) and polyethylene glycol-6000 (PEG) as sources of osmotic stress. Both PEG and NaCl reduced the total above ground biomass and delayed flowering and maturity, with a longer delay observed with the high-level stress. The reduction in number of filled spikelets, 1,000-grain weight, and hence grain yield was significantly greater when they were applied during the reproductive stage than during the vegetative stage. The sodium concentration in plant tissues also increased in plants treated with NaCl, indicating that besides osmotic stress, plants were also subjected to ionic stress. Treatment with NaCl decreased the potassium concentration in plant tissues but did not cause significant differences in phenology, biomass accumulation, yield or N uptake compared with PEG. We concluded that the response of IR64 to NaCl was attributed to the osmotic component. These findings may be specific to IR64, which has a medium tolerance to salinity stress. Further studies are needed with longer stress durations to achieve a higher Na + concentration in plant tissues in several varieties with contrasting tolerance to salt stress to further establish the relative importance of osmotic versus ionic components of salt stress in rice.

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Section: Discussionsupporting

confidence: 92%

Response To Salinity In Rice: Comparative Effects Of Osmotic And Ionic Stresses

Castillo

Tuong

Ismail

et al. 2007

Plant Production Science

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100

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“…A threshold of 40 kPa during a single stage (3L-PI, FL-PM) and at all three stages significantly reduced yield by 39-48% in comparison with the flooded control, and yields with 40 kPa were also lower than yields of all treatments with 10 kPa thresholds at one or all stages, but similar to yields with 20 kPa thresholds. Castillo et al (2006) found similar yield reductions with severe stress applied during part of the period PI-FL or part of FL-PM. In a field experiment, De Datta et al (1973b) found 30 and 40% yield reductions with a 15 kPa threshold for two varieties (IR20 and MI-48), and no further reduction with a threshold of 40 kPa.…”

Section: Effect Of Water Stress Treatment On Grain Yield and Yield Cosupporting

confidence: 53%

“…A stress of 40 kPa during FL-PM resulted in significantly lower grain weight than stresses of 10 and 20 kPa at the same stage, and than all stresses at the other two stages. Castillo et al (2006) also found lower grain weight when drought stress was applied during grain filling. However, in the present experiment, when 40 kPa was applied at all three stages, there was no effect on grain weight.…”

Section: Effect Of Water Stress Treatment On Grain Yield and Yield Comentioning

confidence: 83%

“…This was then followed by well-watered conditions to maturity. These studies showed that periods of drought delayed phenological development, but much more so (by up to about three weeks) when the stress was applied during the vegetative phase (Woopereis et al, 1996;Castillo et al, 2006;Davatgar et al, 2009). In these studies, applying stress during the reproductive stage (panicle initiation, booting, flowering) was more detrimental to grain yield than applying stress during the early vegetative stage, while applying the stress during mid tillering was also detrimental.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Water Deficit Stress on Yield Performances in Wet Seeded Rice

2018

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Worldwide fresh water scarcity and labour unavailability in agriculture are driving researchers and farmers to find management strategies that will increase water productivity and reduce labour requirement. Wet seeding instead of transplanting rice greatly reduces the labour requirement for crop establishment, while use of alternate wetting and drying (AWD) instead of continuous flooding reduces irrigation input. However, the safe threshold for irrigating wet seeded rice (WSR) at different crop stages has not been investigated. Therefore, experiment was conducted to determine the effects of different degrees of water stress during different crop growth stages on yield performance of WSR. This was done in greenhouse experiment in the 2011 wet season 2011 at the International Rice Research Institute, Los Baños, Philippines. In the experiment, water stresses were applied by withholding irrigation until soil water tension increased to 10, 20 or 40 kPa (kilo pascal) at 10 cm below the soil surface. Soil water tension was measured using 30 cm long guage tensiometer installed with the center of the ceramic cup. The stresses were applied during three crop stages: 3-leaf (3L) to panicle initiation (PI), PI to flowering (FL), and FL to physiological maturity (PM). The experiment also included a continuously flooded (CF) treatment. The number of drying events ranged from 8-12 during 3L-PI, 6-10 during PI-FL and 6-10 during FL-PM. There was a consistent trend for a decline in the number of irrigations and irrigation input with increasing irrigation threshold, and thresholds of 20 and 40 kPa resulted in significantly lower input than with CF. There were consistent trends for lower grain yield as the level of water deficit stress increased, and imposition of stresses of 20 and 40 kPa at any or all three stages significantly reduced grain yield compared with CF. There was a trend for the reduction in grain yield to be greater when the stresses were imposed at all three stages compared with a single stage, but the differences were not significant. There was a consistent trend for irrigation water productivity (WPi) to decrease as the irrigation threshold increased, with significantly lower values for a 40 kPa threshold at any stage, in comparison with CF. This was because the decline in water input to the pots was less than the decline in yield as the threshold increased. The results suggest that the optimum threshold for irrigation of WSR is 10 kPa during the vegetative and grain filling stages, and that the soil should be kept at close to saturation during PI-FLBangladesh Rice j. 2017, 21(1): 1-12

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“…In rice, leaf expansion stops completely when the root‐zone soil water pressure potential exceeds 50 kPa (Wopereis et al, 1996; Tuong and Bouman, 2003). Water stress may result in delayed flowering, reduce biomass production as a result of reduced transpiration, increase panicle sterility, lower the harvest index (HI), and ultimately impact grain yield (GY) (Xue et al, 2008; Castillo et al, 2006; Xiaoguang et al, 2005). Lafitte and Courtois (2002) observed a large genotype × water interaction for yields of upland rice.…”

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confidence: 99%

Nitrogen Use and Crop Performance of Rice under Aerobic Conditions in a Semiarid Subtropical Environment

et al. 2014

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Aerobic rice (Oryza sativa L.) is gaining in popularity across South Asia, mainly because it saves water and labor. Under warm (sub) tropical conditions of this region, this unconventional system aimed at improved resource use e ciency is still in the development phase. We tested crop performance and N uptake of three local genotypes in relation to di erent water and N supply rates under aerobic conditions at the research station of the University of Agriculture, Faisalabad, Pakistan. In eld experiments during 2009 to 2010, covering two rice seasons, three irrigation levels (high, moderate, and low), three N rates (0, 170, and 220 kg N ha -1 ), and three genotypes (KSK133, IR6, and RSP1), crop performance and total N uptake (TNU) were strongly in uenced by irrigation and di ered among genotypes. At the highest level of irrigation, genotype KSK133 performed better than RSP1 and IR6, resulting in an accumulated aboveground biomass of 13 Mg ha -1 and a grain yield of 5 Mg ha -1 . e TNU ranged from 34 to 126 kg ha -1 in 2009 and from 52 to 123 kg ha -1 in 2010. For all genotypes, we observed a strong positive correlation between TNU and grain yield. Surprisingly, the N application rate did not in uence TNU, but the high irrigation regime increased TNU. e limited response to N application suggests signi cant losses of the applied N. is highlights the need for careful N management in aerobic rice systems; N application should match periods of su cient soil moisture availability and the greatest crop N demand.

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Drought response of dry-seeded rice to water stress timing and N-fertilizer rates and sources

Cited by 28 publications

References 11 publications

Response To Salinity In Rice: Comparative Effects Of Osmotic And Ionic Stresses

Response To Salinity In Rice: Comparative Effects Of Osmotic And Ionic Stresses

Effect of Water Deficit Stress on Yield Performances in Wet Seeded Rice

Nitrogen Use and Crop Performance of Rice under Aerobic Conditions in a Semiarid Subtropical Environment

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