Mohamed Salama
Prof. of Soils and Water Research, Egyptian Atomic Energy Authority, Egypt
Phone: +201007376576
Address: Egypt, Cairo, El Obour city, Ahmed Ramy street, 287B
Phone: +201007376576
Address: Egypt, Cairo, El Obour city, Ahmed Ramy street, 287B
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Papers by Mohamed Salama
The objective of this study was to evaluate the performance of two equations were presented by Salama et al., 2015 to estimate actual evapotranspiration depending on temperature factor (Maximum and Minimum temperature); by connecting between accumulative growing degree day and cumulative actual evapotranspiration under province of Inshas (Egypt).
The results showed that the high yield of spring wheat was obtained by equation (A) for Sids12 and Misr2 varieties while Gemaza10 afford a high yield under equation (B). Also, there are significant differences between the two equations in applied water quantity and water lost by deep percolation; hence, the applied water in equation (A) was 531.1, 554.7 and 576.7mm/season for Sids12, Misr2 and Gemaza10, respectively, while it was 420.3, 438.6 and 455.7mm/season for the same varieties under equation (B). The reduction percent for water lost by deep percolation were 8.33, 8.36 and 8.26% for equation (A) and 5.70, 6.48 and 6.85% for equation (B) under Sids12 and Misr2 and Gemaza10, respectively.
In this paper, the performance and accuracy of two equations on the yield, water applied and deep percolation is prerequisite for selecting an alternative approach or less data dependent methods in case of non-availability of data. Therefore, the temperature-based approaches in equation (A & B) were used to estimate evapotranspiration (ET) at Inshas, Egypt.
management in local and regional water balance studies. At the field scale, ETa is important in irrigation planning and scheduling and is an integral part of field management decision support tools. The conventional approach of estimating actual evapotranspiration is difficult and needs more calculations and extensive data on soil-plant-atmosphere.
A field experiment was conducted to simplify the measurement and calculation of actual evapotranspiration by using thermal units (heat units) for spring wheat crop under trickle irrigation system in sandy soil. Two irrigation methods were applied; the first one (A) using the crop evapotranspiration (ETc) that depends on whether parameters, and the second (B) is the depletion from field capacity which dependent on soil parameters. Three varieties of wheat namely Sids12, Misr2 and Gemmeza10 were cultivated on sand soil and treatments arranged in complete randomized block design with three replicates.
Application of treatment (B) resulted in highly significant increase in yield production of Gemmeza10 and Misr2 as compared to treatment (A). Grain yield of different wheat varieties grown under treatment (B) could be ranked in the following descending order:
Misr2 > Gemmeza10 > Sids12. While under treatment (A) it could be arranged in the
following descending order: Misr2 > Sids12 > Gemmeza10. On the other hand, the overall means indicated non-significant difference between all wheat verities. The highest values of water and irrigation use efficiency as well as heat use efficiency were obtained with treatment (B). The equation used in the present study is available to estimate ETa under arid climate with drip irrigation system.
The objective of this study was to evaluate the performance of two equations were presented by Salama et al., 2015 to estimate actual evapotranspiration depending on temperature factor (Maximum and Minimum temperature); by connecting between accumulative growing degree day and cumulative actual evapotranspiration under province of Inshas (Egypt).
The results showed that the high yield of spring wheat was obtained by equation (A) for Sids12 and Misr2 varieties while Gemaza10 afford a high yield under equation (B). Also, there are significant differences between the two equations in applied water quantity and water lost by deep percolation; hence, the applied water in equation (A) was 531.1, 554.7 and 576.7mm/season for Sids12, Misr2 and Gemaza10, respectively, while it was 420.3, 438.6 and 455.7mm/season for the same varieties under equation (B). The reduction percent for water lost by deep percolation were 8.33, 8.36 and 8.26% for equation (A) and 5.70, 6.48 and 6.85% for equation (B) under Sids12 and Misr2 and Gemaza10, respectively.
In this paper, the performance and accuracy of two equations on the yield, water applied and deep percolation is prerequisite for selecting an alternative approach or less data dependent methods in case of non-availability of data. Therefore, the temperature-based approaches in equation (A & B) were used to estimate evapotranspiration (ET) at Inshas, Egypt.
management in local and regional water balance studies. At the field scale, ETa is important in irrigation planning and scheduling and is an integral part of field management decision support tools. The conventional approach of estimating actual evapotranspiration is difficult and needs more calculations and extensive data on soil-plant-atmosphere.
A field experiment was conducted to simplify the measurement and calculation of actual evapotranspiration by using thermal units (heat units) for spring wheat crop under trickle irrigation system in sandy soil. Two irrigation methods were applied; the first one (A) using the crop evapotranspiration (ETc) that depends on whether parameters, and the second (B) is the depletion from field capacity which dependent on soil parameters. Three varieties of wheat namely Sids12, Misr2 and Gemmeza10 were cultivated on sand soil and treatments arranged in complete randomized block design with three replicates.
Application of treatment (B) resulted in highly significant increase in yield production of Gemmeza10 and Misr2 as compared to treatment (A). Grain yield of different wheat varieties grown under treatment (B) could be ranked in the following descending order:
Misr2 > Gemmeza10 > Sids12. While under treatment (A) it could be arranged in the
following descending order: Misr2 > Sids12 > Gemmeza10. On the other hand, the overall means indicated non-significant difference between all wheat verities. The highest values of water and irrigation use efficiency as well as heat use efficiency were obtained with treatment (B). The equation used in the present study is available to estimate ETa under arid climate with drip irrigation system.