Abstract

Regulated deficit irrigation (RDI) is considered among the best water-saving techniques for supplementing Regulated water to fully achieve the water needs of the plant while maximizing water productivity with little or no substantial decrease in final produce compared to the conventional forms of irrigating crops. The aim of this paper is to review existing RDI approaches used in citrus production as well as plant-water stress indicators. Most of the approaches employed in citrus RDI scheduling require weather data for evapotranspiration calculations which is very technical, laborious and time consuming. Nonetheless, the time domain reflectometer (TDR) offers a simple way of scheduling RDI based on the soil-water status at any given time. This approach will help address the challenges in setting up on-farm synoptic stations to measure weather data to compute evapotranspiration or from using data from weather stations which might be different from the farm conditions. The pros and cons of all the approaches have been discussed and recommended that the TDR can be adopted as an alternative to schedule irrigation in citrus orchards to ensure that plants are supplied with adequate volume of water for maximum water use efficiency.  Key words: Partial root-zone drying, plant-water requirement, plant-water stress, regulated deficit irrigation, remote sensing, subsurface irrigation. 

Highlights

  • Journal of Horticulture and ForestrySadick Amoakohene Appiah, Jiuhao Li1*, Yubin Lan, Kelvin Edom Alordzinu, Alaa Al Aasmi, Hao Wang, Songyang Qiao, Ernest Owusu-Sekyere, Ebenezer Acheampong Afful, Evans Asenso and Fuseini Issaka

  • The aim of this paper is to review existing Regulated deficit irrigation (RDI) approaches used in citrus production as well as plant-water stress indicators

  • To resolve problems of inadequate water supplies for agriculture, Deficit Irrigation (DI) as a management tool should be encouraged to realize the objective of reducing irrigation water use while maintaining or maximizing farmers profit without essentially varying the production area (Fereres et al, 2003; Rosa et al, 2020)

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Summary

Journal of Horticulture and Forestry

Sadick Amoakohene Appiah, Jiuhao Li1*, Yubin Lan, Kelvin Edom Alordzinu, Alaa Al Aasmi, Hao Wang, Songyang Qiao, Ernest Owusu-Sekyere, Ebenezer Acheampong Afful, Evans Asenso and Fuseini Issaka. Pesticides Spraying Technology (NPAAC), South China Agricultural University Guangzhou China. The aim of this paper is to review existing RDI approaches used in citrus production as well as plant-water stress indicators. Most of the approaches employed in citrus RDI scheduling require weather data for evapotranspiration calculations which is very technical, laborious and time consuming. The time domain reflectometer (TDR) offers a simple way of scheduling RDI based on the soil-water status at any given time. This approach will help address the challenges in setting up on-farm synoptic stations to measure weather data to compute evapotranspiration or from using data from weather stations which might be different from the farm conditions.

INTRODUCTION
Definition and approaches to DI in citrus
Forms of RDI under citrus cultivation
Water scarcity in citrus production
Approach to RDI
Period of water application
Citrus crop critical periods
Effects of deficit irrigation on citrus yield
Sap flow
Remote sensing in water stress detection
Calculating citrus water requirements
CONCLUSION
Sensing of Environment
Ecological indicators
Irrigation and Drainage systems
International Journal of Recycling of Organic Waste in Agriculture
Findings
Journal of
Full Text
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