Effects of Water Stress and Fertilization on Yield and Protein of Forage Maize Under Fertigation System

Document Type : Research Paper


1 Former MSc. student, Department of Soil Science, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran.

2 Assistant professor, Department of Water Engineering, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran.


     To save and protect of water resources, optimizing of water use in agriculture is inevitable. This research was carried out to study effect of water stress and fertilizer on grain yield and protein content of forage maize. In this regards a factorial experiment design with three replicates was conducted in the experimental field research of ShahrekordUniversity during spring and summer 2010. Experiment factors were irrigation in the four treatments (supplying 60, 80,100 and 120% water requirement, named I2, I3 and I4, respectively). Fertilization was included five levels, supplying 0, 60, 80,100 and 120% of the recommended nutrition. Mentioned treatments were named F0 -as control level, F1, F2, F3 and F4, respectively. The fertilizers were applied by fertigation. Results indicated that grain yield and protein in maize are significantly affected by water amount, fertilizer level and their interaction. Among irrigation treatments the maximum grain yield (18570 Kg/ha) obtained under I4 treatment, which wasn't significantly different from that of I3 treatment (α<1%) and so the maximum quantity protein production (2122 Kg/ha) and maximum protein fraction (13.9%) obtained under I4 and I2 treatments, respectively. Among Fertilization treatments the maximum quantity and friction of protein production (17552 and 2188 Kg/ha), respectively obtained under F4 treatment. In the other hand the maximum protein percent (12.8%) obtained under F3 treatment that its quantity wasn't significantly different from percent of F4 treatment (α<1%). Therefore, considering environmental and economic aspects similar to that of this project, Implementation of treatment I3 combined with fertilizer application rate F3 is recommended.


  • Receive Date: 24 October 2011
  • Revise Date: 30 September 2014
  • Accept Date: 05 January 2013
  • Publish Date: 19 February 2013