Tolerance of canola to drought and salinity stresses in terms of root water uptake model parameters

Yanagawa, Aki; Fujimaki, Haruyuki

doi:10.2478/johh-2013-0009

Cited by 17 publications

(19 citation statements)

References 14 publications

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“…Some crops cope well under conditions where soil generally imparts water stress (Yanagawa & Fujimaki 2013). Huzsvai & Rajkai (2009) demonstrated the adaptability of maize plants to water deficit.…”

Section: Introductionmentioning

confidence: 99%

Root and leaf traits, water use and drought tolerance of maize genotypes

Végh

2013

Biologia

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Abstract:The main components of drought tolerance of six maize genotypes were studied to evaluate crop performance in water limiting environments: (1) the postponement of dehydration by reduced transpiration rate (TR) and an increased efficiency of water acquisition from soil; (2) the tolerance of dehydration by effective physiological water use. The aim was to describe the genotype dependent response to drought in leaf and root traits and water relations using data from controlled environment and field experiments, and using dynamic simulation by the Swedish Coup model. High genetic variation was detected in the root density, acquisition efficiency and water use among the genotypes. The female parent lines had the greatest TR with the smallest dry matter accumulation in water deficiency, whereas hybrids could acquire more water from dryer soil while maintaining a lower TR. Hybrid Mv 444 increased water potential more strongly in leaves than hybrid Norma. The postponement of dehydration was observed for Norma, while more tolerance to dehydration characterized Mv 444. Simulation was an effective tool for testing hypotheses considering water acquisition efficiency and for summarizing the results of the measurements in a formalized structure; it helped to quantify the dynamics of water availability and the impact of drought on the growth of the maize genotypes.

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Section: Introductionmentioning

confidence: 99%

Root and leaf traits, water use and drought tolerance of maize genotypes

Végh

2013

Biologia

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“…The simulation results for the pairs of cases with the same retention curve (Cases 1 and 4, Cases 2 and 3) were similar (compare Figures 5 and 6). The suction required to deplete VWCs during normal growth has been reported to be about 1000 cm [30]; therefore, we considered that Case 1 (600 cm) and Case 4 (700 cm) provided the more realistic values of h 50 for application in HYDRUS-1D, even though the RMSEs of Cases 2 and 3 were lower. The common factor for Cases 1 and 4 was the use of the measured retention curve.…”

Section: Optimization Of H 50 and Simulation Of Evapotranspirationmentioning

confidence: 99%

Optimal Choice of Soil Hydraulic Parameters for Simulating the Unsaturated Flow: A Case Study on the Island of Miyakojima, Japan

Okamoto

Sakai

Nakamura

et al. 2015

Water

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Abstract:We examined the influence of input soil hydraulic parameters on HYDRUS-1D simulations of evapotranspiration and volumetric water contents (VWCs) in the unsaturated zone of a sugarcane field on the island of Miyakojima, Japan. We first optimized the parameters for root water uptake and examined the influence of soil hydraulic parameters (water retention curve and hydraulic conductivity) on simulations of evapotranspiration. We then compared VWCs simulated using measured soil hydraulic parameters with those using pedotransfer estimates obtained with the ROSETTA software package. Our results confirm that it is important to always use soil hydraulic parameters based on measured data, if available, when simulating evapotranspiration and unsaturated water flow processes, rather than pedotransfer functions. OPEN ACCESSWater 2015, 7 5677

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“…VWC for all the depths and treatments decreased with time due to evapotranspirational water loss (Fig. 4) (Huzsvai & Rajkai 2009;Yanagawa & Fujimaki 2013); however, values differed depending on depth and the treatment method used. The difference in values of VWC between the two treatments became more pronounced from 5 days after flooding at 11.5 cm and 27.0 cm depths, and from 2 days after flooding at a depth of 43.0 cm, where the values of VWC for the CC-FLD treatment decreased more extensively in comparison with those of the noCC-FLD treatment.…”

Section: Environmental Conditions and Plant Growthmentioning

confidence: 99%

Advantages of pre-harvest temporal flooding in a catch crop field in relation to soil moisture and nutrient salt removal by root uptake

et al. 2014

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Catch crop cultivation coupled with subsequent flood activity is an environmental friendly method of removing nutrient salts from soil in greenhouse. However, in comparison with the usual fallow period in greenhouse horticulture in Japan, a longer time is required for cultivation and soil drying after flooding. To minimize such time while retaining catch crop performance, temporal flooding was conducted in an experimental catch crop field of corn before harvest (i.e., pre-harvest temporal flooding), when crops were growing well and most nutrient salts within the soil had been taken up by the roots. Results showed that pre-harvest temporal flooding enhanced crop growth and stomatal opening; hence, evapotranspiration (mostly transpiration) was increased to a high value (3.5 times that of bare soil plot in greenhouse). Therefore, compared with the bare soil field, there was a remarkable pronounced decrease in the soil water content due to evapotranspirational water loss in the catch crop field after temporal flooding. Furthermore, the total nutrient (nitrogen) uptake by crops was also significantly accelerated in relation to pre-harvest flooding owing to the increase in crop growth. It was also found that electrical conductivity and nitrate nitrogen concentration of soil solution (at a soil-water ratio of 1:5) decreased with time owing to root uptake, and were at a fairly low level when pre-harvest flooding was conducted. These results suggest that pre-harvest temporal flooding shortens the implementation time by accelerating soil drying, and increases salt removal by root uptake; thus, this method delivers considerable advantages for practical use in catch crop cultivation.

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Tolerance of canola to drought and salinity stresses in terms of root water uptake model parameters

Cited by 17 publications

References 14 publications

Root and leaf traits, water use and drought tolerance of maize genotypes

Root and leaf traits, water use and drought tolerance of maize genotypes

Optimal Choice of Soil Hydraulic Parameters for Simulating the Unsaturated Flow: A Case Study on the Island of Miyakojima, Japan

Advantages of pre-harvest temporal flooding in a catch crop field in relation to soil moisture and nutrient salt removal by root uptake

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