Effect of Irrigation Intervals on Soil Salinity and Cotton Yield

Soomro, Abid Ali; Mirjat, M. S.; ., F.C. Oad; ., H. Soomro; ., M.A. Samo; ., N.L. Oad

doi:10.3923/jbs.2001.472.474

Cited by 8 publications

(2 citation statements)

References 1 publication

(1 reference statement)

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“…The irrigation rate consists of bringing the actual moisture to the field capacity [11]. This method allows the yield components to develop under good water conditions [12,13]. Thus, the following formula is applied:…”

Section: Determination Of the Water Supplymentioning

confidence: 99%

Effect of Supplemental Irrigation on Durum Wheat (Triticum durum) Crop and Water use Efficiency under a Saline Environment in the Lower Cheliff Plain

BELLAGUE,

YAHIAOUI,

GACEMI

et al. 2023

QJAS

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In Algeria, the launching of projects encouraging the practice of supplemental irrigation on cereals to increase productivity and the sustainability of farms in arid and semiarid regions is confronted with the problems of water use efficiency and soil quality conservation. The use of poor-quality irrigation water for supplemental irrigation is subject to secondary salinization processes, which become worse over time. The present paper aims to study the impact of supplemental irrigation on the increase of durum wheat yield, water use and soil salinization, a trial was set up in the soil of the HMADNA experimental station (RELIZANE, Lower-Cheliff). The experimental set-up is a randomized block with three replications and five treatments (water regime): T1 rainfed, T2 irrigated at tellering stage (T), T3 irrigated up to booting stage (TB), T4 irrigated up to heading stage (TBH) and T5 irrigated up to grain filling stage (TBHF). The parameters studied were: grain yield (GrYd), water consumption or actual evapotranspiration (AET), water use efficiency (WUE), soil salinity (EC) and water satisfaction rate (Ts). The analysis of the variance of the measured parameters showed significant to highly significant differences. Under the experimental conditions of the study site, the supplemental irrigation corresponding to the T5 water regime with an AET of 543mm, contributed significantly to the increase in grain yield up to 62.64 Qx/ha with a WUE of 11.83 Kg/ha/mm and a Ts of 96.31%. Moreover, an irrigation water quantity of near 113mm at the end of the wheat vegetative cycle (grain filling stage) causes the leaching of salts from the surface layer (H0-20cm) previously acquired during the vegetative cycle of the crop. The behavioural study of the saline profile showed that the salinity of the H20-40cm layers undergoes a secondary salinization process with an increased rate ranging from 100% to 220%. In saline environments, the contribution of supplemental irrigation is very important to ensure sustainable food security within specific phenological stages (end of cycle) according to the prevailing climatic conditions of the area while meeting the water needs of the crop.

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Section: Determination Of the Water Supplymentioning

confidence: 99%

Effect of Supplemental Irrigation on Durum Wheat (Triticum durum) Crop and Water use Efficiency under a Saline Environment in the Lower Cheliff Plain

BELLAGUE,

YAHIAOUI,

GACEMI

et al. 2023

QJAS

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“…Salinity reduces crop yield under greenhouse and field conditions, e.g., in barley, , wheat, − cotton, , sugar cane, rice, maize, and sugar beet . Crops and cultivars differ in their tolerance to salinity, which is further modulated by environmental and soil conditions.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Salinity Effects on Past, Present, and Future Soil Organic Carbon Stocks

Setia

Smith

Marschner

et al. 2012

Environ. Sci. Technol.

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Soil organic carbon (SOC) models are used to predict changes in SOC stocks and carbon dioxide (CO(2)) emissions from soils, and have been successfully validated for non-saline soils. However, SOC models have not been developed to simulate SOC turnover in saline soils. Due to the large extent of salt-affected areas in the world, it is important to correctly predict SOC dynamics in salt-affected soils. To close this knowledge gap, we modified the Rothamsted Carbon Model (RothC) to simulate SOC turnover in salt-affected soils, using data from non-salt-affected and salt-affected soils in two agricultural regions in India (120 soils) and in Australia (160 soils). Recently we developed a decomposition rate modifier based on an incubation study of a subset of these soils. In the present study, we introduce a new method to estimate the past losses of SOC due to salinity and show how salinity affects future SOC stocks on a regional scale. Because salinity decreases decomposition rates, simulations using the decomposition rate modifier for salinity suggest an accumulation of SOC. However, if the plant inputs are also adjusted to reflect reduced plant growth under saline conditions, the simulations show a significant loss of soil carbon in the past due to salinization, with a higher average loss of SOC in Australian soils (55 t C ha(-1)) than in Indian soils (31 t C ha(-1)). There was a significant negative correlation (p < 0.05) between SOC loss and osmotic potential. Simulations of future SOC stocks with the decomposition rate modifier and the plant input modifier indicate a greater decrease in SOC in saline than in non-saline soils under future climate. The simulations of past losses of SOC due to salinity were repeated using either measured charcoal-C or the inert organic matter predicted by the Falloon et al. equation to determine how much deviation from the Falloon et al. equation affects the amount of plant inputs generated by the model for the soils used in this study. Both sets of results suggest that saline soils have lost carbon and will continue to lose carbon under future climate. This demonstrates the importance of both reduced decomposition and reduced plant input in simulations of future changes in SOC stocks in saline soils.

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Analysis of technical efficiency of dry season rice production in saline and non-saline areas of Bangladesh

Sarker

Rolfe

Ananda

2022

Journal of Environmental Management

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Effect of Irrigation Intervals on Soil Salinity and Cotton Yield

Cited by 8 publications

References 1 publication

Effect of Supplemental Irrigation on Durum Wheat (Triticum durum) Crop and Water use Efficiency under a Saline Environment in the Lower Cheliff Plain

Effect of Supplemental Irrigation on Durum Wheat (Triticum durum) Crop and Water use Efficiency under a Saline Environment in the Lower Cheliff Plain

Simulation of Salinity Effects on Past, Present, and Future Soil Organic Carbon Stocks

Analysis of technical efficiency of dry season rice production in saline and non-saline areas of Bangladesh

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