Document Type : Research Paper
Authors
1 Graduate M.S. Dep. of Water Eng., Technical Engineering Faculty, Kerman Branch, Islamic Azad University, Kerman, Iran.
2 Dep. of Water Eng., Technical Engineering Faculty, Kerman Branch, Islamic Azad University, Kerman, Iran.
Abstract
To evaluate the effect of different levels of treated wastewater on potato growth indices, an experiment was conducted in the form of split strip plots based on a randomized complete block design with triplications. In this study, treatments at three levels of water requirement (I1 = 100, I2 = 85 and I3 = 70) as the main factor and two water quality (well water = Q1and treated municipal wastewater = Q2) as a secondary factor, were taken. The results of the study of yield and yield components of potato in different irrigation showed that applying 85% of water requirement using wastewater compare with 100% water requirement of the plant, increases water consumption efficiency by 3.5% and saved 443 m3/ha. While 85% of water requirement, no significant reduction of yield and growth indices was observed compared to full irrigation. Yield of treated wastewater was 34.6% higher than the use of well water. Tuber weight and the number of tubers per plant in wastewater treatment were 30.5% and 41% higher than the use of well water, respectively. Application of 85% low irrigation to meet the full water needs of the plant in potato cultivation in the city of Kerman is recommended.
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