Evapotranspiration and seed yield of field grown soybean under deficit irrigation conditions

Karam, F.; Masaad, Randa; Sfeir, Thérèse; Mounzer, O.; Rouphael, Youssef

doi:10.1016/j.agwat.2004.12.015

Cited by 138 publications

(102 citation statements)

References 17 publications

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“…Compared with severe drought (T4 and T6), relatively high aboveground dry matter accumulation values of 49 and 85 g were observed in the treatments with slight drought stress during B and FPS (T3 and T5). Similar results were reported in the study by Karam et al [39]. They reported that the reduced dry matter accumulation of stressed soybean plants was mainly observed during the R2 stage (full bloom), and lower variability was observed …”

Section: Aboveground Dry Matter Accumulationsupporting

confidence: 80%

“…Similar to plant height, LAP development was also affected by drought stress. During B and FPS, the respective LAP loss in T2 and T4 were 45% and 66% of the full irrigated treatment, which was comparable to a study by Karam et al [39]. They found that water deficit during the R2 (full bloom) stage reduced leaf area index by 52% when compared to the control.…”

Section: Leaf Area Per Plantsupporting

confidence: 77%

“…Foroud et al [42] reported that water deficit before the early stage of flowering had little effect on soybean yields. Karam et al [39] reported that seed number per plant of soybean under a pod-filling stage water deficit decreased by 20%, while early drought had little effect. Significance *** *** *** *** *** *** S, seedling stage; B, branching stage; FPS, flowering and pod-setting stage; PF, pod-filling stage.…”

Section: The Effects Of Water Deficit On Yield and Its Componentsmentioning

confidence: 99%

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Quantitative Response of Soybean Development and Yield to Drought Stress during Different Growth Stages in the Huaibei Plain, China

et al. 2018

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Abstract:To quantitatively access the effects of drought stress during different growth stages of soybean on development process and yield, a pot-culture experiment was conducted in China's Huaibei Plain with different irrigation treatments over two seasons (2015 and 2016). Two drought stress levels (mild and severe) were applied at four growth stages for the experiment (S: seedling stage; B: branching stage; FPS: flowering and pod-setting stage; and PF: pod-filling stage). The effects of drought stress at different stages on growth and yield were evaluated and compared. Results of this two-year study showed that all growth and yield parameters were significantly affected by the water deficit during the sensitive FPS. Compared to the full irrigation treatment, severe drought stress during FPS caused a 22% loss of final plant height, 61% loss of the leaf area per plant (LAP), and 67% loss of final aboveground dry matter (ADM). Yield components also declined dramatically with water deficits during FPS and PF. Significant seed yield losses of 73-82% per plant were observed in the plants exposed to drought stress during FPS, and were also associated with the highest nonviable pod percentage of 13%. The greatest losses in 100-seed weight (42-48%) were observed under drought stress during PF. A rising trend in response to increasing soil water deficit (SWD) was observed for LAP, yield, and ADM losses. The slope (k) values of these fitting curves varied at different treatments, the highest value of k (7.37 and 8.47 in two years, respectively) was also observed in the sensitive FPS.

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Section: Aboveground Dry Matter Accumulationsupporting

confidence: 80%

Section: Leaf Area Per Plantsupporting

confidence: 77%

Section: The Effects Of Water Deficit On Yield and Its Componentsmentioning

confidence: 99%

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Quantitative Response of Soybean Development and Yield to Drought Stress during Different Growth Stages in the Huaibei Plain, China

et al. 2018

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“…Still, soybean is largely rainfed in regions where there is propensity for drought (Kim et al, 2007). Water stress during the growing season is harmful to soybean development (Karam et al, 2005) and significantly reduces yields if it occurs in the flowering and podding stages because the flowers and pods are shed (Liu et al 2003). Soybean yield and quality are sensitive to irrigation (Liu et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Impact of Deficit Irrigation on Yield and Chemical Properties of Soybean Seeds in Temperate Climate

Kresović

Gajić

Tapanarova

et al. 2017

Contemporary Agriculture

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“…Predicting soybean yield response to water is required for assessing irrigation management strategies to be adopted by farmers. Attention should be paid to the crop stages where water stress is most critical, with several studies having identified the period from flowering to grain filling as the most sensitive to water stress [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Water Use and Yield of Soybean under Various Irrigation Regimes and Severe Water Stress. Application of AquaCrop and SIMDualKc Models

Giménez

Paredes

Pereira

2017

Water

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Data relative to two soybean seasons, several irrigation scheduling treatments, including moderate and severe deficit irrigation, and rain-fed cropping were used to parameterize and assess the performance of models AquaCrop and SIMDualKc, the latter combined with the Stewart's yield model. SIMDualKc applies the FAO56 dual crop coefficient approach for computing and partitioning evapotranspiration (ET) into actual crop transpiration (T c act ) and soil evaporation (E s ), while AquaCrop uses an approach that depends on the canopy cover curve. The calibration-validations of models were performed by comparing observed and predicted soil water content (SWC) and grain yield. SIMDualKc showed good accuracy for SWC estimations, with normalized root mean square error (NRMSE) ≤ 7.6%. AquaCrop was less accurate, with NRMSE ≤ 9.2%. Differences between models regarding the water balance terms were notable, and the ET partition revealed a trend for under-estimation of T c act by AquaCrop, mainly under severe water stress. Yield predictions with SIMDualKc-Stewart models produced NRMSE < 15% while predictions with AquaCrop resulted in NRMSE ≤ 23% due to under-estimation of T c act , particularly for water stressed treatments. Results show the appropriateness of SIMDualKc to support irrigation scheduling and assessing impacts on yield when combined with Stewart's model.

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Evapotranspiration and seed yield of field grown soybean under deficit irrigation conditions

Cited by 138 publications

References 17 publications

Quantitative Response of Soybean Development and Yield to Drought Stress during Different Growth Stages in the Huaibei Plain, China

Quantitative Response of Soybean Development and Yield to Drought Stress during Different Growth Stages in the Huaibei Plain, China

Impact of Deficit Irrigation on Yield and Chemical Properties of Soybean Seeds in Temperate Climate

Water Use and Yield of Soybean under Various Irrigation Regimes and Severe Water Stress. Application of AquaCrop and SIMDualKc Models

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