EFEECT OF IRRIGATION MANAGEMENT AND FERTILIZATION ON N, P AND K CONCENTRATION OF TWO WHEAT VARIETIES

Abstract

A Field experiment was conducted during the season 2016-2017 in AlMahaweel Research Station in Babel Governorate /Ministry of Agriculture to determine the role of irrigation and fertilization management in growth and yield of two wheat varieties IPA 99 and Al-Rasheed 22. The experiment included four irrigation treatments: River water irrigation (I0), Salty well water irrigation (I1), Alternate irrigation one irrigation with river water
followed by two irrigation with well water (I2) and Traditional farmer irrigation treatment (I3). Six fertilization treatments: treatment without fertilization and without foliar application (T0), fertilization treatment with NPK without foliar application (T1), fertilization treatment with NPK with foliar application with Zn (T2), fertilization treatment with NPK with foliar application with Zn and Fe (T3), fertilization treatment with NPK with foliar application with Zn, Fe and Mn (T4) and fertilization treatment with NPK with foliar application with Zn, Fe, Mn and Cu (T5). Two varieties of wheat IPA 99 (V1) and Al-Rasheed 22 (V2). Determine the amount and period irrigation depended on sensors reading of volumetric water content was measured using GS3 sensors. Irrigation water was applied at 50% depletion to the depth of effective root zone and calculates depth of water applied up to
field capacity. Amount of irrigation water to the local farmer irrigation was determined according to traditional irrigation schedule by farmer up to field capacity. The most important results can be summarized: The amount of irrigation water added varied with a variation of irrigation treatments I0, I1, I2 and I3. The amounts were 4938, 4141, 4864 and 4138 m3 ha-1 for IPA 99 and 4909, 4172, 4829 and 4192 m3 ha-1 for Al-Rasheed 22 respectively, irrigation water quantity added varied depending on the sensor's reading. The irrigation treatment I0, I2 and I3 significantly increased the concentration of N, P and K in grain while the concentration of N, P and K in grain decrease on I1 irrigation treatment for IPA 99 and Al-Rasheed 22. The foliar application treatments significantly increased the concentration of N, P and K in grain for IPA 99 and Al-Rasheed 22.