Drip irrigation and fertigation improve economics, water and energy productivity of spring sunflower ( Helianthus annuus L.) in Indian Punjab

Sinha, Indu B.; Buttar, G. S.; Brar, A. S.

doi:10.1016/j.agwat.2017.02.008

Cited by 46 publications

(23 citation statements)

References 7 publications

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“…Este último resultado coincide con los hallazgos de otros estudios, en los que atribuyen que este sistema de riego minimiza el requerimiento de agua al reducir las pérdidas de aplicación (evaporación del suelo, etc.) y minimizando el crecimiento de malezas (Ayars et al, 2015;Eranki et al, 2017;Sinha et al, 2017). Por otro lado, el análisis del agua subterránea (agua de pozo) mostró niveles de salinidad muy altos para ser clasificada como recurso no apto para la agricultura.…”

Section: Discussionunclassified

Análisis de sistemas de riego por gravedad y goteo subsuperficial basada en una encuesta de muestra de conveniencia en el valle de Mexicali.

et al. 2020

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La producción agrícola en el valle de Mexicali ha tenido una historia llena de contrastes. Aunque la actividad agrícola se encuentra en una recesión de la que apenas puede recuperarse, las prácticas agrícolas continúan sin cambios significativos, con la conservación y la gestión sostenible de los recursos como una prioridad. El siguiente estudio busca evaluar el perfil productivo tradicional del cultivo de alfalfa utilizando el sistema de riego por gravedad y lo compara con un sistema de riego por goteo subterráneo. El Marco de Evaluación de Sistemas mediante Indicadores de Sustentabilidad (MESMIS) se utilizó para definir el sistema que ofrece mejores condiciones en términos sustentables para la realidad actual del Valle de Mexicali. Los resultados proponen un escenario favorable para el sistema de riego por goteo en ocho de los 10 indicadores propuestos y analizados. En términos de sustentabilidad, el sistema de riego por goteo mostró superioridad en los atributos de productividad, equidad, resiliencia y adaptabilidad; mientras que el sistema de riego por gravedad presentó predominio en autogestión.

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Section: Discussionunclassified

Análisis de sistemas de riego por gravedad y goteo subsuperficial basada en una encuesta de muestra de conveniencia en el valle de Mexicali.

et al. 2020

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“…Grain yield was highly correlated with the irrigation amount in the soil. Uniform accessibility of moisture in the soil during FI and SSDI resulted in a high grain yield [49]. Soil moisture in SDI was depleted quickly because of soil evaporation, restricting water uptake by roots, and enforcing extremely bad physiological limitations [50], as well as harm to the photosynthetic system [51], contraction of the development period, assimilated translocation, reduced carbon fixation, and reduced grain set.…”

Section: Evapotranspiration Grain Yield Yield Components and Biomassmentioning

confidence: 99%

Water-Saving Potential of Subsurface Drip Irrigation For Winter Wheat

et al. 2019

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Groundwater plays a major role in agro-hydrological processes in the North China Plain (NCP). The NCP is facing a water deficit, due to a rapid decline in the water table because of the double cropping system. A two crop (maize and wheat) rotation is required to balance the food supply and demand, which leads to an imbalance between evapotranspiration (ET) and precipitation. Thus, there has been a decline of about 1.35 m yr−1 of groundwater (Luancheng Agroecosystem Experimental Station (LAES), NCP) during the last 10 years. Lysimeter experiments were conducted under different irrigation treatments (flood, surface drip, and subsurface drip) to account for ET in the selection of a suitable irrigation method. Subsurface drip irrigation reduced ET by 26% compared to flood irrigation, and 15% compared to surface drip irrigation, with significant grain yield and biomass formation due to decreased evaporation losses. Grain yield, yield components, and above ground biomass were similar in subsurface drip and flood irrigation. However, these biomass parameters were lower with surface drip irrigation. Furthermore, subsurface drip irrigation increased the crop water productivity (24.95%) and irrigation water productivity (19.59%) compared to flood irrigation. The subsurface irrigated plants showed an increase in net photosynthesis (~10%), higher intrinsic water use efficiency (~36%), lower transpiration rate (~22%), and saved 80 mm of water compared to flood irrigation. Our findings indicate that subsurface drip irrigation can be adopted in the NCP to increase water use efficiency, optimize grain yield, and minimize water loss in order to address scarcity.

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“…The proper design, operation, and management of fertigation may enable uniform application of fertilizers and increase crop yields or their quality. Proper fertigation may also save fertilizers and reduce water usage by directly delivering water and nutrient near to crop roots, which boost economic and energy profitability to farmers (Sinha et al, 2017;Tian et al, 2017). However, inappropriate fertigation may reduce crop growth and yield, as well as may lead to environmental problems and contamination hazards related to soil, groundwater and surface water (Silva et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Characterization of venturi injector using dimensional analysis

Sobenko

Frizzone

Camargo

et al. 2019

Rev. bras. eng. agríc. ambient.

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Venturi injectors are commonly employed for fertigation purposes in agriculture, in which they draw fertilizer from a tank into the irrigation pipeline. The knowledge of the amount of liquid injected by this device is used to ensure an adequate fertigation operation and management. The objectives of this research were (1) to carry out functional tests of Venturi injectors following requirements stated by ISO 15873; and (2) to model the injection rate using dimensional analysis by the Buckingham Pi theorem. Four models of Venturi injectors were submitted to functional tests using clean water as motive and injected fluid. A general model for predicting injection flow rate was proposed and validated. In this model, the injection flow rate depends on the fluid properties, operating hydraulic conditions and geometrical characteristics of the Venturi injector. Another model for estimating motive flow rate as a function of inlet pressure and differential pressure was adjusted and validated for each size of Venturi injector. Finally, an example of an application was presented. The Venturi injector size was selected to fulfill the requirements of the application and the operating conditions were estimated using the proposed models.

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Drip irrigation and fertigation improve economics, water and energy productivity of spring sunflower ( Helianthus annuus L.) in Indian Punjab

Cited by 46 publications

References 7 publications

Análisis de sistemas de riego por gravedad y goteo subsuperficial basada en una encuesta de muestra de conveniencia en el valle de Mexicali.

Análisis de sistemas de riego por gravedad y goteo subsuperficial basada en una encuesta de muestra de conveniencia en el valle de Mexicali.

Water-Saving Potential of Subsurface Drip Irrigation For Winter Wheat

Characterization of venturi injector using dimensional analysis

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