التراكيب المحصولية الراهنة و المثلي البديلة لرفع كفاءة استخدام مياه الري لأهم المحاصيل الحقلية الصيفية في مصر

الملخص EN

In recent years, Ethiopia went to the construction to build dams on the river's springs, which will affect negatively on the Egyptian water security.

More summer tabs water consumption, which includes rice crops, maize, sorghum, cotton and sugar cane.

Thus, we must search for the best crop structures, which reduced the total amount of irrigation water used.

On the other hand, to maximize the revenue from the use of the water unit.

Linear programming is one of tools used in this, the focus had been on the assumption that the reduction of rice crop area as the most used and most summer water in the area planted.

The emphasis has been on the assumption of reducing the area of rice as the most water-used summer crop in the cultivated area.

Crop composition has been shown to be the ideal alternative to low irrigation water, which is supposed to achieve about 75% are self-sufficient in the crop.

In addition, with restrictions on the rest of the crop, At least the area of other crops is less than the minimum.

The total savings in irrigation water for this alternative amounted to about 627.93 million cubic meters, representing about 3% of the total amount of irrigation water for the current situation.

If an investigation assumed about 50% of the rice is self-sufficient, with total irrigation water savings of about 1,228.2 million cubic meters, representing about 5.87% of the total amount of irrigation water for the current situation.

The net return of the irrigation water unit for crop installation was about 0.62 pounds for the first assumption, while the second alternative amounted to about 0.73 pounds.

While in the case of crop composition, which assumes that the area of reeds planted is not less than the minimum and maximum, the net return of the irrigation water unit was about 0.68 pounds.

About 9.67% higher than the current crop structure.

Therefore, it is recommended that the area of maize, sorghum, cotton and sugar cane be determined to reduce the amount of irrigation water to be about 2605, 350, 132, 326 thousand acres.

if the self-sufficiency of rice is assumed to be about 75%, in the form of about 2930, 350, 132, 326 thousand acres assuming selfsufficiency Rice is about 50% low because of the low irrigation water used to irrigate these crops.

The area of these crops should be about 2214, 350, 521, 328 thousand acres with the first crop composition, while about 2214, 350, 846, 328 thousand acres with the second crop in order to maximize the return on the water unit used