Sorghum Seed Germination as Affected by Moisture and Temperature

Evans, W. F.; Stickler, F. C.; Laude, Hubert

doi:10.2307/3626708

Cited by 5 publications

(3 citation statements)

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“…However, studies on chilling tolerance in field conditions (Maulana & Tesso, 2013 ; Ostmeyer et al, 2020 ) do not report the effect of soil moisture on germination and seedling emergence. Soil moisture deficit and low temperature both impair germination and delay emergence in sorghum (Evans et al, 1961 ), but their interactions are not well understood. Consequently, our study suggests that hybrids with chilling tolerance should be planted under optimum levels of initial soil moisture to ensure early crop establishment, as recommended for other crops such as maize (Lu et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Crop modeling defines opportunities and challenges for drought escape, water capture, and yield increase using chilling‐tolerant sorghum

et al. 2021

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Many crop species, particularly those of tropical origin, are chilling sensitive, so improved chilling tolerance can enhance production of these crops in temperate regions. For the cereal crop sorghum ( Sorghum bicolor L.), early planting and chilling tolerance have been investigated for >50 years, but the potential value or tradeoffs of this genotype × management change have not been formally evaluated with modeling. To assess the potential of early planted chilling‐tolerant grain sorghum in the central US sorghum belt, we conducted CERES‐Sorghum simulations and characterized scenarios under which this change would be expected to enhance (or diminish) drought escape, water capture, and yield. We conducted crop growth modeling for full‐ and short‐season hybrids under rainfed systems that were simulated to be planted in very early (April), early (May 15), and normal (June 15) planting dates over 1986–2015 in four locations in Kansas representative of the central US sorghum belt. Simulations indicated that very early planting will generally lead to lower initial soil moisture, longer growing periods, and higher evapotranspiration. Very early planting is expected to extend the growing period by 20% for short‐ or full‐season hybrids, reduce evaporation during fallow periods, and increase plant transpiration in the two‐thirds of years with the highest precipitation (mean > 428 mm), leading to 11% and 7% increase grain yield for short‐ and full‐season hybrids, respectively. Thus, in this major sorghum growing region, very early and early planting could reduce risks of terminal droughts, extend seasons, and increase rotation options, suggesting that further development of chilling‐tolerant hybrids is warranted.

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Section: Discussionmentioning

confidence: 99%

Crop modeling defines opportunities and challenges for drought escape, water capture, and yield increase using chilling‐tolerant sorghum

et al. 2021

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“…Although, studies on chilling tolerance in field conditions (Maulana and Tesso, 2013; Ostmeyer et al, 2020) do not report the effect of soil moisture on germination and seedling emergence. Soil moisture deficit and low temperature both impair germination and delay emergence in sorghum (Evans et al, 1961), but their interactions are not well understood. Consequently, our study suggests that hybrids with chilling tolerance should be planted under optimum levels of initial soil moisture to ensure early crop establishment, as recommended for other crops such as maize (Lu et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Crop modeling defines opportunities and challenges for drought escape, water capture, and yield increase using chilling-tolerant sorghum

Raymundo

Ciampitti

Morris

2021

Preprint

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Many crop species, particularly those of tropical origin, are chilling sensitive so improved chilling tolerance can enhance production of these crops in temperate regions. For the cereal crop sorghum (Sorghum bicolor L.) early planting and chilling tolerance have been investigated for >50 years, but the potential value or tradeoffs of this genotype × management change has not been formally evaluated with modeling. To assess the potential of early-planted chilling-tolerant grain sorghum in the central US sorghum belt, we conducted CERES-Sorghum simulations and characterized scenarios under which this change would be expected to enhance (or diminish) drought escape, water capture, or yield. We conducted crop growth modeling for a full- and short-season hybrids under rainfed systems that were simulated to be planted in early (mid-April), normal (mid-May), and late (mid-June) planting dates from 1986 to 2015 in four locations in Kansas representative of the central US sorghum belt. Simulations indicated that early planting will generally lead to lower initial soil moisture, longer growing periods, and higher evapotranspiration. Early planting is expected to extend the growing period by 20% for short- or full-season hybrids, reduce evaporation during fallow periods, and increase plant transpiration in the two-thirds of years with the highest precipitation (mean > 428 mm), leading to 11% and 7% increase grain yield for short- and full-season hybrids, respectively. Thus, in this major sorghum growing region early planting could reduce risks of terminal droughts, extend seasons, and increase rotation options, suggesting that further development of chilling tolerant hybrids is warranted.

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“…By contrast, in Sudan where there are few opportunities for controlled seed storage conditions, Ahmed and Alama (2010) reported viability under 85% after only one or two years in a brick warehouse, a corrugated iron warehouse or an underground pit. Evans et al (1961) studied germination in ten cultivated sorghum genotypes and emphasised the significance of interactions among genotypes, soil moisture and germination temperature in modifying germination outcomes. Shattercane, as its name implies, is able to disperse its seeds through shattering of the panicles.…”

Section: Seed Dormancy Dispersal and Viability Of Cultivated And Weed...mentioning

confidence: 99%

Safety Assessment of Transgenic Organisms in the Environment, Volume 7

2017

Harmonisation of Regulatory Oversight in Biotechnology

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Sorghum Seed Germination as Affected by Moisture and Temperature

Cited by 5 publications

References 17 publications

Crop modeling defines opportunities and challenges for drought escape, water capture, and yield increase using chilling‐tolerant sorghum

Crop modeling defines opportunities and challenges for drought escape, water capture, and yield increase using chilling‐tolerant sorghum

Crop modeling defines opportunities and challenges for drought escape, water capture, and yield increase using chilling-tolerant sorghum

Safety Assessment of Transgenic Organisms in the Environment, Volume 7

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