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Effect of VA-Mycorrhiza on Growth and Yield of Sunflower (Helianthus annuus L.) at Different Phosphorus Levels

Authors: Hossein Soleimanzadeh


The effect of seed inoculation by VA- mycorrhiza and different levels of phosphorus fertilizer on growth and yield of sunflower (Azargol cultivar) was studied in experiment farm of Islamic Azad University, Karaj Branch during 2008 growing season. The experiment treatments were arranged in factorial based on a complete randomized block design with three replications. Four phosphorus fertilizer levels of 25%, 50% 75% and 100% P recommended with two levels of Mycorrhiza: with and without Mycorrhiza (control) were assigned in a factorial combination. Results showed that head diameter, number of seeds in head, seed yield and oil yield were significantly higher in inoculated plants than in non-inoculated plants. Head diameter, number of seeds in head, 1000 seeds weight, biological yield, seed yield and oil yield increased with increasing P level above 75% P recommended in non-inoculated plants, whereas no significant difference was observed between 75% and 100% P recommended. The positive effect of mycorrhizal inoculation decreased with increasing P levels due to decreased percent root colonization at higher P levels. According to the results of this experiment, application of mycorrhiza in present of 50% P recommended had an appropriate performance and could increase seed yield and oil production to an acceptable level, so it could be considered as a suitable substitute for chemical phosphorus fertilizer in organic agricultural systems.

Keywords: Sunflower, seed yield, phosphorus fertilizer, VA-mycorrhiza

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[1] S. Mehrvarz, M. R. Chaichi, and H. A. Alikhani, "Effects of phosphate solubilizing microorganisms and phosphorus chemical fertilizer on yield and yield components of barley (Hordeum vulgare L.)". American- Eurasian J. Agric. Environ. Sci. vol. 3, no. 6, pp. 822-828, 2008.
[2] A. K. Sharma, "Bio-fertilizers for sustainable agriculture". Agrobios Indian Publications, 2002.
[3] M. J. Malakooti, "Sustainable agriculture and yield increment by optimum fertilizer utilization in Iran",2nd edition. Agricultural Extension Publications, Iran ,2000.
[4] M. J. Malakooti, and M. Nafisi, 1995. "Fertilizer utilization in agricultural lands irrigated and dry land systems". 2nd edition, Tarbiate Modaress University Publications, Iran, 1995.
[5] N. Arpana, S. D. Kumar, and T. N. Prasad, "Effect of seed inoculation, fertility and irrigation on uptake of major nutrients and soil fertility status after harvest of late sown lentil", Journal of Applied Biology, vol. 12, pp. 23-26, 2002.
[6] N. Salehrastin, "Biological fertilizers. Soil and Water Research Institute of Iran". Scientific Journal of Soil and Water, vol. 12, pp. 35-42, 1999.
[7] N. Aliasgharzadeh, N. Saleh Rastin, H. Twofighi, and A. Alizadeh, "Occurrence of arbuscular mycorrhizal fungi in saline soil of Tabriz plain of Iran in relation to some physical and chemical properties of soil". Mycorrhiza, vol. 11, pp. 119-22, 2001.
[8] M. Miransari, H. A. Bahrami, F. Rejali, M. J. Malakouti, and H. Torabi, "Using arbuscular mycorrhiza to reduce the stressful effects of soil compaction on corn (Zea mays L.) growth", Soil Biol Biochem, vol. 39, pp. 2014-2026, 2007.
[9] M. Miransari, H. A. Bahrami, F. Rejali, and M. J. Malakouti, "Using arbuscular mycorrhiza to reduce the stressful effects of soil compaction on wheat (Triticum aestivum L.) growth", Soil Biol Biochem, vol. 40, pp. 1197-1206, 2008.
[10] F. Feldman, and E. Idczak, "Inoculum production of vesiculararbuscula mycorrhizal fungi for use in tropical nurseries". In: Norris, J.R., D.J. Read and A.K. Varma (ed). Methods in microbiology, techniques for the study of mycorrhiza, New York, Academic Press, 1992.
[11] P. S. Mahaveer, R. Singh, and A. Adholeya, "Laboratory manual for basic techniques in arbuscular mycorrhizal research", New Dehli: Center for Mycorrhizal Research, Tata Energy Research Institute, 2000.
[12] Sas Institute Inc, "SAS/STAT User-s Guide". Version 6, fourth ed. Statistical Analysis Institute Inc, Cary, NC, 1988.
[13] H. Tohidi-Moghaddam, B. Sani, and F. Ghooshchi, "The effect of nitrogen fixing and phosphate solubilizing microorganism on some quantitative parameters on soybean from sustainable agricultural point of views". Proceeding of 8th Agronomy and Plant Breeding Congress of Iran, Guilan University , Iran, 2004.
[14] R. M. Auge, "Water relations, drought and vesicular-arbuscular mycorrhizal symbiosis", Mycorrhiza, vol. 11, pp. 3-42, 2001.