Simultaneous Impact of Deficit Irrigation Methods and Superabsorbent Polymer on Morphological, Physiological and Yield Characteristics of Corn

Authors

1 M. Sc. Student, Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran

2 Assistant Professor, Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran

3 Professor, Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran

Abstract

To study the simultaneous impact of conventional and alternate-furrow deficit irrigation and superabsorbent polymer on characteristics of corn, a field experiment was carried out at Research Farm of College of Agriculture, Islamic Azad University, Karaj, Iran, in 2013-2014 growing season. Conventional deficit irrigation with three levels including irrigation with 100, 75 and 50% crop water requirement, localized deficit irrigation with two levels including fixed alternate furrow irrigation and conventional furrow irrigation that were located in the main plots and superabsorbent polymer with two levels including control (non-use superabsorbent polymer Stockosorb) and use of superabsorbent (30kg/ha) that were located in the sub plots. The results showed the amount of fresh and dry forage yield and biological yield in fixed alternate furrow irrigation method were not different significantly as compared to the conventional furrow irrigation method, while the volume of irrigation water during the growing season in fixed alternate furrow irrigation decreased by 25.9 %. Superabsorbent consumption lead to reduced irrigation water at a rate of 13.4 % during the growth season. highest water use efficiency for dry forage yield (2.04 kg.m-3) was obtained in treatment of fixed alternate furrow irrigation in condition of moderate stress and used of superabsorbent, that increased by 75.9% as compared to control treatment and there was significant difference. In conventional furrow irrigation method, average of water use efficiency for dry forage yield and biological yield was obtained 1.32 and 3.52 kg.m-3, respectively; while in fixed alternate furrow irrigation was increased to 1.75 and 4.31 kg.m-3, respectively.

Keywords


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