WATER AND FERTILIZER REQUIRMENTS OF RICE CROP IN SOME SOILS OF DELTA REGION

Abstract

Tow field experiments and one pot experiment were conducted at Mishla, Kafer El-Ziat, ( Ghrbia governorate) in 1996 growing season. Rice variety Giza 177 was pia nted . All culture practices except the factors under investigation were carried out as common practices, which recommended by the Ministry of agriculture and land reclamation.

Experiment 1: The effect of water management on rice yield, water consumptive use and water requirements. The. experiment covered the study of the effect ofwater management on yield and yield components of rice and N, P and K concentrations, water requirements and consumptive use of rice, and the effect of paddy cultivation of rice on some chemical properties of the soil. The irrigation treatments were eight as follows: 1- Irrigation every 4 days interval, raising the submerged head to 7 em depth (control). 2- Irrigation when the first foot ofthe soil surface reached the saturation then supplied water 12 em head as a submerged head. 3- Same as treatment 2 except the submerged head was 8 em.

4- Same as treatment 2 except the submerged head was 4 em.

5- Irrigation when the first foot of the soil surface reached 75% of full saturation then supplied water 12 em head as a submerged head. 6- Same as treatment 5 except the submerged head was 8 em.

7- Same as treatment 5 except the submerged head was 4 em. 8- Irrigation when the first foot of the soil surface reached field capacity, then supplied water to full saturation.