Effect of low-level irrigation and different-level of N-fertilizer on yield and yield components of corn hybrids (Zea mays L) in Kermanshah temperate climate, Western Iran

Document Type : Research Paper


Department of Agriculture, Islamic Azad university, Science and Research Branch Tehran, Iran



To investigate the effect of different levels of N-fertilizer in diverse-content irrigation and drought-stress on yield and yield components of various hybrids of corn, an experiment has been conducted for two years (2016-2017) as split plot based on a randomized complete block design with four replications at Natural Resource and Agricultural Research Station, Kermanshah Province, Western Iran located in West Eslamabad (63 km west of Kermanshah). The amount of water-requirement has been assigned as main plots in three levels including 100%, 80% and 60% of water-requirement as perfect, moderate- and extreme-stress levels, respectively. Different levels of N-fertilizer (in the form of urea) were determined based on results of soil-experiment consisting of suggested-amount equal to 170 Kg N ha-1, 30% higher than the suggested-amount (221 Kg N ha-1), 30% lower than the suggested-amount (119 Kg N ha-1), as well as corn hybrids (ksc260, ksc500, ksc703) were dedicated as subplots. In normal states, increasing N-fertilizer level of 119 Kg N ha-1 to 221 Kg N ha-1 improved these attributes, however, imposing drought-stress declined. While in stress-drought accompanied with increasing N-fertilizer from 119 Kg N ha-1 to 170 Kg N ha-1 improved these attributes. Meanwhile, the N-fertilizer effect has not been so important. The grain yield of ksc730 hybrid was higher than the others in the normal and moderate-stress, while reaction to N-fertilizer by ksc260 hybrid was better and led to more enhanced yield in the extreme drought-stress particularly accompanied via applying 221 Kg N ha-1.


Al-Bakeir, HM 2003, Yield, growth rate, and nutrient content of corn (Zea mays L.) hybrids. Hebron University Research Journal, 1: 25-38.
Al-Dulaimy, QZA, Hammad, HS & Al-Tamimi, RA 2022, Effects of planting date and spraying with organic fertilizers on vegetative growth indices of dill plant (Anethum graveolens L.). Caspian Journal of Environmental Sciences, 20: 793-798.
Alizadeh Oghianos, p, Azari, A & Salimi, M 2009, Evaluation of the lines and hybrids of corn grain yield in response to water stress and amounts of nitrogen fertilizer interaction. 1st National Conference of Environmental Stress in Agricultural Sciences. University of Birjand, Birjand, Iran.
Ashouri, M 2019, Nitrate pollution reduction using biological fertilizers in paddy fields, the South Caspian Sea basin, Guilan Province, Iran. Caspian Journal of Environmental Sciences, 17: 63-71.
Ashofteh Beiragi, M, Ebrahimi, M, Mostafavi, Kh & Khavari Khorasani, S 2011, A study of morphological basis of corn (Zea mays L.) yield under drought stress condition using correlation and path coefficient analysis. Journal of Cereals and Oilseeds, 2: 32-37.
Attafi, R, Darvishi Boloorani, AM, Fadhil Al-Quraishi, A, Amiraslani, F 2021, Comparative analysis of NDVI and CHIRPS-based SPI to assess drought impacts on crop yield in Basrah Governorate, Iraq. Caspian Journal of Environmental Sciences, 19: 547-557.
Batayneh, KA, Abdel Razzaq, MG, Ghazuan, T, Sabah Jabr, HM, Hameed, NS, Zabibah, R, Obaid, FN, Obaid, AJ, Attia Thijail, H, Ahjel, S, Safaa, G & Ghaleb Maabreh, H 2022, Effects of water shortage on food legume crops. Caspian Journal of Environmental Sciences, 20: 839-844.
Erphrath, JE, Alm, DM, Hesketh, JD & Huck, MG 1996, Water, nitrogen and weed stress in field corn (Zea mays L.): shoot growth and development. Bioronics, 25: 55-65.
Hopkins, WG 2004, Introduction to plant physiology. 3rd Ed., John Wiely & Sons, New York, 557 p.
Kamara, A, Menkir, A, Badu-Apraku, B & Ibikunle, O 2003, Reproductive and stay green trait responses of maize hybrids, improved open-pollinated varieties and farmers local varieties to terminal drought stress. Maydica 48: 29-37.
 Kgasago, H 2006, Effect of planting dates and densities on yield and yield components of short and ultra-short growth period maize (Zea mays L.). PhD Dissertation, Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, University of Pretoria, South Africa, 120 p.
Mojadam, M & Modahaj, A 2011, The effect of nitrogen levels on water consumption efficiency, yield and yield components of grain maize under optimal conditions and drought stress, Iranian Journal of Field Crops Research, 10: 546-554.
Moser, S, 2004, Effects of pre-anthesis drought stress and nitrogen on yield, nitrogen use efficiency, and grain minerals of tropical maize varieties, A dissertation submitted to the Swiss Federal Institute of Technology, Zurich for the degree of Doctorate of Natural Sciences. Diss. ETH No. 15527.
O’Leary, M 2016, Maize: From Mexico to the world. CIMMYT. Retrieved by, http://www.cimmyt. org/maize-from-mexico-to-the-world/, May 20, 2016.
Rakhimova, OV, Khramoy, VK, Sikharulidze, TD & Yudina, IN 2021, Influence of nitrogen fertilizers on protein productivity of vetch-wheat grain under different water supply conditions. Caspian Journal of Environmental Sciences, 19: 951-954.
Rostami, M, Koocheki, AR, Nassiri Mahallai, N & Kafi, M 2008, Evaluation of chlorophyll meter (SPAD) data for prediction of nitrogen status in corn (Zea mays L.), American- Eurasian Journal of Agriculture & Environmental Sciences, 3: 79-85.
Sahi, MK, Haran, MS & Hanoon, MB 2022, Effect of inoculation with Bacillus spp., A. chroococcum, P. fluorescens and phosphorous levels on the amount of major nutrients in maize (Zea mays L.) irrigated with saline water. Caspian Journal of Environmental Sciences, 20: 533-537.
Shafea, L & Saffari, M 2010, Effects of zinc (ZnSO4) and nitrogen on chemical composition of Maize grain. International Journal of AgriScience 1: 323-328.
Sobhani, B & Safarianzengir, V 2020, Monitoring and prediction of drought using T.I.B.I Fuzzy index in Iran. Caspian Journal of Environmental Sciences, 18: 237-250