Effect of Soil Water Stress at Various Growth Stages on Soybean Yield<sup>1</sup>

Doss, B. D.; Pearson, R. W.; Rogers, H. T.

doi:10.2134/agronj1974.00021962006600020032x

Cited by 160 publications

(114 citation statements)

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“…is considered a drought sensitive crop (Mullet and Whitsitt, 1996). The negative effects of water stress are most important during reproductive development (Sionit and Kramer, 1977;Shaw and Laing, 1966;Doss et al, 1974). Water deficit has been shown to increase reflectance in the visible (380-760 nm) range, decrease reflectance in the near infrared (760-1,300 nm) range and to increase reflectance in the mid-infrared (1,300-2,500 nm) range (Carter, 1991;Carter et al, 1992;Carter, 1993).…”

Section: Introductionmentioning

confidence: 99%

Response of an Indeterminate Soybean {Glycine Max (L.) Merr} to Chronic Water Deficit During Reproductive Development Under Greenhouse Conditions

Atti¹,

Bonnell²,

Smith³

et al. 2004

Canadian Water Resources Journal / Revue canadienne des ressour

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Although crops are commonly exposed to chronic moderate water deficit stress, most research has been focused on catastrophic and extreme moisture deficit stress. A greenhouse experiment was conducted to: (i) assess the impact of chronic water stress, during reproductive development, on soybean growth and productivity; (ii) determine the effects of water stress on soybean canopy architecture; and (iii) evaluate changes in canopy reflectance due to water deficit. Soybean plants were grown under three moisture regimes: daily watering at 100% (control), 50% (medium stress W2) and 25% (severe stress W1) of evapotranspiration. Water stress during reproductive development decreased plant physiological activity, vegetative growth, and productivity and had a visible impact on plant canopy architecture at both stress levels. Water deficit reduced leaf chlorophyll content at the severe stress level. At the physiological level, the major effect of chronic water stress was a decrease in stomatal conductance. Water stress decreased the rate of plant vegetative growth for all variables measured, suggesting that water deficit during reproductive growth might have induced an early switch of plant development from vegetative to reproductive. Water deficit, at W1 and W2, did not affect the pod dry weight to total canopy dry weight ratio. This suggested that the proportional allocation of dry matter to reproductive structures was maintained and, although the stress was imposed during reproductive development, vegetative and reproductive structures were equally affected. This may be a function of the indeterminate nature of the soybean cultivar. Paraheliotropism behaviour was observable at W2, but not at W1. Thus, there might be a threshold stress level beyond which leaf movement cannot be activated, preventing control of transpiration through canopy movement. Water stress affected the spectral reflectance signature of soybean leaves, increasing leaf reflectance in the visible and decreasing it in the infrared spectral ranges at both stress levels.Résumé : Bien que les cultures soient communément exposées à la sécheresse chronique modérée, la recherche se concentre sur les déficits hydriques catastrophiques et extrêmes. Dans cet article, nous décrivons une expérimentation conduite en serre pour : (i) évaluer l'impact du déficit hydrique sur la croissance et productivité du soja (Glycine max (L.) Merr.); (ii) déterminer les effets du stress sur l'architecture de la canopée du soya; et (iii) évaluer l'effet du stress sur la réflectivité de la canopée. Les plantes de soja furent cultivées sous trois régimes d'irrigation : arrosage journalier à 100% (contrôle W3), 50% (stress moyen W2) et 25% (stress sévère W1) de l'évapotranspiration. Le stress hydrique diminua l'activité physiologique, la croissance végétative, et productivité du soja, et affecta l'architecture de la canopée aux deux niveaux de stress. Le stress hydrique a diminué le contenu foliaire en chlorophylle pour le stress sévère. Au niveau physiologique, l'effet maj...

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Section: Introductionmentioning

confidence: 99%

Response of an Indeterminate Soybean {Glycine Max (L.) Merr} to Chronic Water Deficit During Reproductive Development Under Greenhouse Conditions

Atti¹,

Bonnell²,

Smith³

et al. 2004

Canadian Water Resources Journal / Revue canadienne des ressour

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“…However, stress during the reproductive growth stage tends to reduce yield directly (Doss et al, 1974;Sionit and Kramer, 1977;Hirasawa et al, 1994;Saitoh et al, 1999). The drought stress at the pod fi lling stage seems to be most serious (Fukui, 1965;Doss et al, 1974;Sionit and Kramer, 1977;Saitoh et al, 1999).…”

mentioning

confidence: 99%

Drought Tolerance Characteristics of Brazilian Soybean Cultivars— Evaluation and characterization of drought tolerance of various Brazilian soybean cultivars in the field —

Oya

Nepomuceno

Neumaier

et al. 2004

Plant Production Science

125

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“…Soybean seed yield is more affected by water stress during the flowering-pod setting period (Runge and Odell, 1960; Thompson, 1970;Ashley and Ethridge, 1978;Korte et al, 1983a;Kadhem et al, 1985a) and the seed filling period (Doss et al, 1974;Constable and Hearn, 1978;Brown et al, 1985;Griffin et al, 1985) than during the vegetative period.…”

mentioning

confidence: 99%

Water deficits during reproductive growth of soybeans. I. Their effects on dry matter accumulation, seed yield and its components

et al. 1991

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Summary — The objective of this study was to determine the effect of water deficits during the reproductive period of an indeterminate soybean (Glycine max (L) Merr) crop on growth, seed yield and its components, and to establish whether the R 1 -R 4 or the R 4 -R 6.3 period was the most sensitive to drought. Group maturity III cultivar Asgrow 3127 was planted in the 1986—1987 and 1987-1988 growing seasons on a loamy soil (typic argiudol). The trial consisted of 3 deficiency treatments starting with 50% of soil-available water at the soil depth explored by the roots at the time of initiation, and with a control (II) constantly maintained at > 50% of soil available water. The treatment drought periods were: 0I) from R 1 to R 4 ; 10) from R 4 to R 6.3 ; and 00) from R 1 to R 4 and from R 4 to R 6.3 . Plots were individually irrigated and during the drought periods protected from rainfall with plastic covers. The control treatment (II) had greater dry matter production than 0I and 10, and these 2 treatments produced more dry matter than 00. Drought from R 1 to R 4 decreased leaf area production and drought from R 4 to R 6.3 accelerated leaf senescence. Leaf area index was related to percent solar radiation interception showing a critical LAI of = 5.5. Consequently, water deficits affected solar radiation interception. The reduction in PAR intercepted by the crop due to water deficits was no greater than 12%. The utilization efficiency of the intercepted PAR that ranged from 1.5-1.9 g per MJ was clearly affected by the drought. Drought during the first period affected the vegetative growth with little effect on seed yield. This effect was reflected on harvest index and on dry matter remobilization efficiency. On the other hand, the reduction in crop growth rate induced by drought during the R 4 -R 6.3 period was associated with important decreases in the number of reproductive structures per unit area as well as in total vegetative dry matter. The number of pods/ha was the yield component most affected by the treatments. For 0I, the number of seeds/pod and the weight of the seeds compensated the reduction in number of pods, relative to the control. water deficit / Glycine mex (L) Merr

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Effect of Soil Water Stress at Various Growth Stages on Soybean Yield¹

Cited by 160 publications

References 1 publication

Response of an Indeterminate Soybean {Glycine Max (L.) Merr} to Chronic Water Deficit During Reproductive Development Under Greenhouse Conditions

Response of an Indeterminate Soybean {Glycine Max (L.) Merr} to Chronic Water Deficit During Reproductive Development Under Greenhouse Conditions

Drought Tolerance Characteristics of Brazilian Soybean Cultivars— Evaluation and characterization of drought tolerance of various Brazilian soybean cultivars in the field —

Water deficits during reproductive growth of soybeans. I. Their effects on dry matter accumulation, seed yield and its components

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Effect of Soil Water Stress at Various Growth Stages on Soybean Yield1

Cited by 160 publications

References 1 publication

Response of an Indeterminate Soybean {Glycine Max (L.) Merr} to Chronic Water Deficit During Reproductive Development Under Greenhouse Conditions

Response of an Indeterminate Soybean {Glycine Max (L.) Merr} to Chronic Water Deficit During Reproductive Development Under Greenhouse Conditions

Drought Tolerance Characteristics of Brazilian Soybean Cultivars— Evaluation and characterization of drought tolerance of various Brazilian soybean cultivars in the field —

Water deficits during reproductive growth of soybeans. I. Their effects on dry matter accumulation, seed yield and its components

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Effect of Soil Water Stress at Various Growth Stages on Soybean Yield¹