Opportunities and risks with early sowing of sunflower in a salt-affected coastal region of the Ganges Delta

Paul, Priya Lal Chandra; Bell, R.W.; Barrett-Lennard, Edward G.; Kabir, Enamul; Gaydon, Donald S.

doi:10.1007/s13593-021-00698-9

Cited by 23 publications

(27 citation statements)

References 29 publications

(37 reference statements)

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“…Nevertheless, our results suggest that farmers only have a 24-h window following heavy rainfall to implement effective drainage. Drainage can either be implemented as a rapid response to heavy rainfall [16], or pre-installed as surface or sub-surface drains [17]. While 48 h inundation and subsequent waterlogging in the root zone was damaging to shoot and root growth, sunflower plants showed some evidence of recovery.…”

Section: Discussionmentioning

confidence: 99%

“…Hence, plants may recover in part from the damaging effect of waterlogging when re-aeration of the root zone occurs after a period of stress. Nevertheless, the risk of crop damage can be decreased by installed surface and/or sub-surface drainage to reduce waterlogging effects and improve plant growth and yield [16,17].…”

Section: Discussionmentioning

confidence: 99%

“…2021, 5, 68 2 of 12 to unexpected post-monsoon rainfall [16]. A recent study that varied the time of sowing for sunflower in this area showed significant yield loss (30%) due to waterlogging from sudden rainfall [16]. The same study reported that adequate surface drainage and appropriate agronomic management were needed to minimize the waterlogging risks.…”

Section: Introductionmentioning

confidence: 91%

“…However, sunflower is susceptible to damage during the germination or seedling stage due Soil Syst. 2021, 5, 68 2 of 12 to unexpected post-monsoon rainfall [16]. A recent study that varied the time of sowing for sunflower in this area showed significant yield loss (30%) due to waterlogging from sudden rainfall [16].…”

Section: Introductionmentioning

confidence: 91%

“…However, little information is available on the effect of short-term waterlogging on the emergence and early-stage (2 and 4-leaf stage) growth of sunflower. Our previous field observations suggest that early stages of sunflower growth on saline clay-textured soil with a shallow water table were sensitive to heavy post-monsoonal rainfall events [16]. This study, therefore, aimed to evaluate the impact of short-term waterlogging on the emergence, and shoot and root development of sunflower at early growth stages, and to determine the most sensitive stage for waterlogging damage and the maximum duration of waterlogging that plants could tolerate under field conditions.…”

Section: Introductionmentioning

confidence: 99%

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Short-Term Waterlogging Depresses Early Growth of Sunflower (Helianthus annuus L.) on Saline Soils with a Shallow Water Table in the Coastal Zone of Bangladesh

et al. 2021

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Sunflower (Helianthus annuus L.), which is widely grown globally for its high-quality edible oil, is reasonably salt and drought tolerant but it is susceptible to waterlogging. In the saline coastal zone of the Ganges delta, sunflower is often exposed to sudden heavy rainfall during early growth but plant tolerance to such events is not known. Hence, we evaluated the effect of short-term soil inundation (referred to as waterlogging) for 0, 24, 48 and 72 h on sunflower at emergence, 2-leaf, and 4-leaf stages in early- and late-sown crops under field conditions (saline, clay-textured soil, and shallow groundwater). Waterlogging for 24 h did not affect sunflower at any stage but waterlogging for 48 and 72 h suppressed emergence and growth at the 2 and 4-leaf stages. Waterlogging for 72 h completely prevented the emergence for early sowing, whereas emergence was less affected for later sowing. Shoot and root dry weight were most affected at the emergence and 2-leaf stage, not at the 4-leaf stage. In conclusion, waterlogging caused by more than 24 h soil inundation at up to the 4-leaf stage severely depressed emergence and growth, indicating the need for effective drainage at sowing of sunflower in the low-lying coastal saline zone of Bangladesh.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Short-Term Waterlogging Depresses Early Growth of Sunflower (Helianthus annuus L.) on Saline Soils with a Shallow Water Table in the Coastal Zone of Bangladesh

et al. 2021

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Early sowing increases nitrogen use efficiency of sunflower in wet clay soils

et al. 2023

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Early sowing increases yield potential of sunflower on wet, saline clay soils but the effects on nitrogen (N) requirements have not been determined. In a 2-year study on a drainable field with wet, saline clay soils in southwestern coastal Bangladesh, we investigated nitrogen use efficiency (NUE) and yield responses to N rates (0, 60, 90, 120, 150, 180 and 210 kg ha −1 ) for zero-till sunflower cv. Hysun-33 sown from November 30 (early) to December 30 (late). Early sowing produced highest seed yield (3.59 ton ha −1 ) and oil yield (1400 kg ha −1 ) at 150 kg N ha −1 . Delayed sowing (December 15-December 30) reduced seed and oil yields by 4%-15% and 7%-18%, respectively. In late sowing, crops suffered from multiple stresses (soil-water deficit, salinity, and heat), which decreased yields. The N fertilizer requirement in late sowing was higher (180 kg ha −1 ) to achieve maximum yield, yet the yield was lower than from earlier sowing. Compared with nil N supply, the rates of 60-150 kg N ha −1 increased seed and oil yields of the early-sown sunflower by 1.3-3.3 times and 1.2-2.9 times, respectively, whereas the rates of 180-210 kg N ha −1 decreased seed and oil yields by 2%-5% and 7%-14%, respectively. Higher net profit (US$764) was also achieved from earlier sowing with 150 kg N ha −1 . We conclude that under wet and saline clay soils, higher sunflower yield in early sowing is attributable to lower stress that increased NUE and decreased N requirement.

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Impact of Different Tillage Systems on the Dynamics of Soil Water and Salinity in the Cultivation of Maize in a Salt-Affected Clayey Soil of the Ganges Delta

Paul

Bell²,

Barrett-Lennard³

et al. 2022

Transforming Coastal Zone for Sustainable Food and Income Security

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Opportunities and risks with early sowing of sunflower in a salt-affected coastal region of the Ganges Delta

Cited by 23 publications

References 29 publications

Short-Term Waterlogging Depresses Early Growth of Sunflower (Helianthus annuus L.) on Saline Soils with a Shallow Water Table in the Coastal Zone of Bangladesh

Short-Term Waterlogging Depresses Early Growth of Sunflower (Helianthus annuus L.) on Saline Soils with a Shallow Water Table in the Coastal Zone of Bangladesh

Early sowing increases nitrogen use efficiency of sunflower in wet clay soils

Impact of Different Tillage Systems on the Dynamics of Soil Water and Salinity in the Cultivation of Maize in a Salt-Affected Clayey Soil of the Ganges Delta

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