Study of temprature effects on maze different hybrids yield, yield componants and phenological stage in Jiroft region

Subject Areas : New Finding in Agriculture

M. H. Shirzadi ¹ , R. Chokan ² , H. Heidari Sharifabad ³ , M. J. Mirhadi ⁴ , H. Madani ⁵

1 - Ph. D. Student, Islamic Azad University, Science and Research Branch, Trhran Branch, Iran
2 - Assist. Prof., Seed and Plant Improvement Institute, Karaj, Iran
3 - Prof., Research Institute of Seed Recording and Certification, Karaj, Iran
4 - Assist. Prof., Islamic Azad University, Science and Research Campus, Tehran Branch, Iran
5 - Associ. Prof., Islamic Azad University, Arak, Iran

Received: 2015-12-04 Accepted : 2015-12-04 Published : 2008-01-21

Keywords: Maize, Hybrid, yield, Phenology, temperature, Sowing date,

Abstract :

To study of temperature effects on maize different hybrids yield, yield components and phonological stages, this study were conducted in split-plots based on RCBD with three replications in Islamic Azad University, Jiroft branch during 2004-2005. The sowing dates (including 1 and 16 July, 1 and 16 August), and hybrids (ZP434, BC404, OSSK444, BC504, KSC500, G3337, NS540, BC666, BC678, KSC704, G3393 and KSC700) were selected as main and sub-plots, respectively. Results showed that year and sowing date had not significant effects on summer maize grain yield in this region. Although, one month retarding of sowing date (16 July - 16 August) were caused the yield decreasing by 3.9%, but this effect was not significant. Hybrids had significance effects (P<0.01) on maize seed yield and BC678, BC666 (belongs to FAO600 by 11.489 and 11.404 ton/ha), KSC704 and G3393 (belongs to FAO700 by 11.253 and 11.110 ton/ha) have the highest grain yield. Effects of sowing date on yield components were not significant, while hybrid's effect were significant (P<0.01). Grains/row was significantly affected by sowing date and studied hybrids had significant effects on yield components. BC678 (37.8) and KSC704 (37.8) and KSC500 (29.5) had maximum and minimum grains/row, respectively. Required growth degree days (GDD) from sowing until tassel formation, pollination and silk appearance at 5% probability level and requisite GDD from sowing until emergence and maturity in 1% probability level were significant.

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