Effects of planting date and plant density on yield and some physiological characteristics of single cross 550 hybrid maize as a second crop

Document Type : Research Paper


Department of Biology, Payame Noor University, Tehran, Iran


Maize grain yield has a high potential and as planting late maturing cultivars is delayed for any reason, middle-aged maize cultivars can be used as an alternative plant. Observing planting date and plant density is very important in increasing maize yield. In 2019 in Koohdasht City, Iran, a statistical design of split plots was performed based on complete blocks with three replications.  The aim of this study was to investigate the effect of density (6, 7, 8 and 9 plants m-2) and planting date (6, 13 and 20 July) on grain yield and its components in single cross maize cultivar 550.  Planting dates were considered as main plots and planting densities were considered as sub-plots.  By increasing density, traits such as number of leaves per plant, number of leaves above maize, stem diameter, maize diameter, maize length, number of grains per row and 1000-grain weight decreased.  By delay in planting, plant height, number of leaves per plant, maize length, stem diameter, maize diameter, number of grains per row and 1000-grain weight decreased.  The highest grain yield (14.313 tons per hectare) was obtained from the first planting date (6 July) with a density of 9 plants m-2.  By elevating density, plant height, maize height, grain yield, biological yield and degree of fruiting increased and the number of rows per maize, number of grains per row, maize diameter, cob diameter, stem diameter and 1000-grain weight decreased.


Akintoye, HA, Lucas, EO & killing, JG 1997, Effects of density of planting and time of nitrogen application on maize varieties in different ecological zones of west Africa. Communications in Soil Science and Plant Analysis, 28:1163-1175.
Afsharmanesh, GR 2007, Effect of planting time on yield of sweet and super sweet corn in Jiroft region. New Economic Knowledge in Agriculture, 3: 1-12 (In Persian with English Abstract).
Andrata, FH, Uhart, SA & Frugone, MI 1993, Intercepted radition.at flowering and kernel number in maize. shade versus plant density effects. Journal of Agronomy and Crop Science, 33: 482-485.
Choukan, R & Samavat, A 2000, Effect of summer planting date (second cropping) on yield and yield components of maize hybrids and determination their relations by path analysis. Seed and Plant, 16: 88-98, [In Persian].
Hashemi Dezfouli, A & Herbert, SJ 1992, Intensifying plant density response of corn with artificial shade. Agronomy Journal, 24: 1141-1145.
 He, W, Yang, JY, Qian, B, Drury, CF, Hoogenboom, G, He, P, Lapen, D & Zhou, W 2018, Climate change impacts on crop yield, soil water balance and nitrate leaching in the semiarid and humid regions of Canada. PLoS ONE, 13:  e0207370.
Khajehpour, MR & Seyedi, F 2000, The effect of planting date on yield components and grain and oil yields of sunflower cultivars. Agricultural Science and Technology and Natural Resources, 4: 127-117, [In Persian].
Koucaki, A & Khalqani, J 1995, Understanding the basics of crop production (ecophysiological approach) (translation). Ferdowsi University of Mashhad Publications, [In Persian].
Koucaki, A, Rashed Mohassel, MH, Nasiri, M & Sadrabadi, R 1991, Physiological foundations of crop growth and development. Astan Quds Razavi Publications, [In Persian].
  Latifi, N & Damavandi, A 2003, The effect of row spacing and plant density on the growth and development of corn in Damghan region. Journal of Agricultural Sciences and Natural Resources. 11 (1), (In Persian).
Lemcoff, JH & Loomis, RS 1986, Nitrogen influenced on yield determination in maize. Crop Science Journal, 26: 1017-1022.
Liang, J, Zhang, J & Wong MH 1996, Effects of air-filled soil porosity and aeration on the initiation and growth of secondary roots of maize (Zea mays). Plant and Soil, 186: 245-254.
Mokhtarpour, H, Mosavat, SA, Feizbakhsh, MT & Saberi, A 2008, Effect of planting date and plant density on yield of sweet corn in summer planting. Electronic Journal of Crop Production, Gorgan University of Agricultural Sciences and Natural Resources, 113-101, [In Persian].
Noor Mohammadi, Q, Siadat, SA & Kashani, V 1997, Grain cultivation. Shahid Chamran University of Ahvaz Publications, Tehran, Iran, [In Persian].
Oktem, AG 2005, Effect of nitrogen and intra row spaces on sweet corn maize characteristics. Asian Journal of Plant Sciences, 4: 364-364.
Sadeghi, J & Bahrani, MJ 2001, The effect of plant density and nitrogen fertilizer amounts on yield and yield components of corn. Iranian Journal of Crop Sciences, 3: 2, [In Persian].
Sahi, MK, Haran, MS, Hanoon, M,B 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.
Shahkarami, G & Rafiee, M 2009, Response of corn (Zea mays L.) to planting pattern and density in Iran. American-Eurasian Journal of Agriculture and Environmental Sciences, 5: 69-73.
Shevchenko, VA, Soloviev, M & Popova, P 2021, Eligibility criteria for joint ensilage of maize and yellow lupine on poorly productive lands of the Upper Volga region. Caspian Journal of Environmental Sciences, 19: 745-751.
Tollenmaize, M 1991, Physiological basis of genetic improvement of maize hybrids in Ontario from 1959-1988. Crop Science, 31:119-124. 
Uhart, SA & Andrate, FH 1995, Nitrogen deficiency in maize: II. Carbon-Nitrogen interaction effects on kernel number and grain yield. Crop Science, 35: 1348-1389.
Ulger, AC, Ibrikci, H, Cakir, B & Guzel, N 1997, Influence of nitrogen rates and row spacing on corn yield, protein content, and other Plant Parameters. Journal of Plant Nutrition, 20: 1697-1709.
Widdicombe, WD & Thsleter, KD 2002, Row width and plant density effects on corn grow production in the northern corn Belt. Journal of Agronomy and Crop Science, 94: 1020-1023.