Int. J. Agron. Agri. Res.5(6), 93-102, December 2014
In this test, the effect of four plant date, as main factor (23 Jun,3 July,13 July,24 July) and three plant density as sub-factor (67, 77, 87 thousands plant per hectare) investigated on commercial variety KSC 704 and with 12 attendances by designing the split plot in the tropical region of Kermanshah Province (Sare-e-pooleZahab). In this study, characters that investigated were: leaf area index, total dry weight, harvest index and grain yield. The results showed that different plant date and plant density had significant influences on weight and yield components of corn yield and corn gravest index. The maximum total dry weight was obtained during flowering. At this time, the plant had greatest leaf area, and then declined until physiological maturity. The relative growth rate in all treatments was high in the first of growth season, and then declined by the increasing of plant age. The most suitable of plant density for KSC 704 was about 77000 plants per hectare and date of 3 July that noncompetition between plants, sufficient light and nutrient availability, and finally obtained maximum grain yield. Most of the traits including biomass and grain yield was 30620 and 6986 kg/ha respectively, was awarded treatment of plant date (3 July) and plant density, 77 thousands plants per hectare.
Cox WJ. 1996. Whole-plant physiological and yield responses of maize to plant density, Agronomy Journal 88, 489-496.
Daughtry CST, Hollinger SE. 1984, Cost of measuring leaf area index of corn, Agronomy Journal 76, 836-847.
Esechie HA. 1992. Effect of planting density on growth and yield of irrigated maize(zea mays L.) in the Batinah Coast Region of Oman., Journal of Agricultural Science Cambridge 119, 165-169.
Flenet F, Kiniry J, Board J, Westgate M, Reicosky DC. 1996. Row spacing effects on light extinction coefficients of corn, sorghum, soybean, and sunflower, Agronomy Journal 88, 185-190.
Genter CF, camper HM. 1973. Component plant part development in maize as affected by herbicide and population density, Agronomy Journal 65, 669-671.
Govil SR, Pandey HN. 1998. Growth response of maize to crop density, Indian Jornal of Plant Physiology 3(4), 273-276.
Hashemi-dezfouli AM, Herbert SJ. 1992. Intensifying plant density response of corn with artificial shade, Agronomy Journal 84, 547-551.
Hashemi-dezfouli AM, Herbert SJ, Putnam DH. 2005. Yield response of corn to crowding stress, Agronomy Journal 97, 839-846.
Kogbe JOS, Adediran JA. 2003. Influence of nitrogen, phosphorus and potassium application on the yield of maize in the savanna zone of Nigeria,. African Journal of Biology 2, 345-349.
Lucas EO. 1986. The effect of density and nitrogen fertilizer on the growth and yield of maize(zea mays L.) in Nigeria. Journal of Agricultural Science Cambridg 107, 573-578.
McCullough DE, Giradin O, Nihajlivic M, Aguilera A, Tollenaar M. 1994. Influence of N supply on development and dry matter accumulation of an old new maize hybrid, Canadian Journal of Plant Science 74,471-477.
Montgomery EG. 1911, Correlation studies in corn, Nebe, Agricultural Experiment Station Annual Report 24, 108-159.
Paszkiewicz S, Butzen S. 2001. Corn hybrid response to plant population. Crop Management Research and Technology, 11(6).
Porter PM, Hicks DR, Lueschen WE, Ford JH, Warnes DD, Hoverstad TR. 1997. Corn response to row width and plant population in the northern corn belt, Journal of Production Agriculture 10, 293-300.
Rashed Mohasel M, Hossani M, Eabdi M, Molaghilabi E. 1997. Cereal crop (Tranlated). Jahad Daneshgahi Mashhad. University. 165 P.
Reed AJ, Sigletay GW, Schussler JR, Williamson DR, Christy AL. 1999. Shading effectson dry matter nitrogen partitioning kernel number and yield of maize. Crop Science 28, 819-825.
Remison SU, Lucas EO. 1982. Effects of planting density on leaf area and productivity of two maize cultivars in Nigeria, Expl, Agric. 18, 93-100.
Sadeghi F, Chokan R. 2004. Study of the effects of plant date pattern on the yield of commercial maize variety (KSC 700) in Islam a bad moderate region of Kermanshah Province. Seed and plant improvement Journal 2, 221-215.
Sarmadnia GH, Kocheki E. 1989. Crop Physiology. Jahad Daneshgahi of Mashhad University.
Sprague CF, Dudley JW. 1988. Corn and corn improvement, third edition; Madison, Wisconsin, U. S. A.
Seyedeh-Vend M. 2000. Effect of planting pattern on growth and physiological indices and forage maize SC704. M.Sc. Thesis. Dapartmant of Agronomy of Siesstan and Belochesstan University.
Sofeian M. 1998. Effect of planting pattern and density on physiological growth indices, Grian yield and forage of corn varieties (Ksc 647). M.Sc. Thesis. Karaj Islamic Azad University.
Tollenaar M, Aguidera A. 1992, Radiation use efficiency of an old and a new maize hybrid, Agronomy Journal 84, 536-541.