Effect of Depletion Levels of Available Water and Phosphate Fertilization on Water Consumption and Yield of Lettuce
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Engineering College, Al-Qasim Green University, Al-Qasim, Iraq
University of Wasit, College of Agriculture, Al Kut, Wasit, Iraq
Alaa Mahdi Akol   

Engineering College, Al-Qasim Green University, Al-Qasim, Iraq
Ecol. Eng. Environ. Technol. 2023; 2:131–137
A field experiment was conducted with the aim of knowing the effect of different depletion levels of ready water and different levels of phosphate fertilization on the water consumption of lettuce crop, yield coefficient and some characteristics of lettuce plant. (30,60,80) % And the addition of phosphate fertilizer at three levels (0,100,200) kg ha-1 The results showed that the highest water consumption was (386.8) mm at the 30% depletion level and the lowest water consumption at the 80% depletion, reaching (292.8) mm. As for the phosphate fertilization, it had a very small effect on the water consumption. The beginning of growth and then increased in the average age of the plant to decline in the stage of maturity. It is also noted from the results that the different levels of depletion clearly affected the characteristics of the studied plant, as it reached the highest yield at the depletion level of 30% at (36.9) ton h-1, while the lowest yield was at the depletion rate of 80% at (27.1) ton h-1. As for the phosphate fertilization, it was huh. The other as a factor influencing significantly on the yield traits, as it gave the phosphate fertilization to zero level (32.8) ton h-1 for the traits in a row, and the values were higher than them for the level of 100 fertilization, while the phosphate fertilization level 200% gave the highest value for the plant yield.