Effect of Azotobacter and Rhizobium as bio-fertilizers on morphological and physiological trait of African marigold (Tagetes erecta L. cv. Discovery)

Subject Areas : Journal of Plant Ecophysiology

Saharnaz Heydari ¹ , Mohammad Saeed Tadayon ² , Golamreza Moafpourian ³

1 - M.Sc. Student of landscape designing, College of Agriculture, Islamic Azad University, Arsanjan Branch
2 - Assistant Professor, Department of soil and water, Research Center of Agriculture and Natural Resources, Fars Province
3 - Assistant Professor, Department of soil and water, Research Center of Agriculture and Natural Resources, Fars Province

Received: 2016-07-25 Accepted : 2016-12-13 Published : 2018-11-22

Keywords: Ornamental plant, Color index, Chlorophyll a content,

Abstract :

In order to evaluate the use of bio-Fertilizers (Rhizobium and Azotobacter) on morphological and physiological characters of African marigold, a study was conducted in 2015 at Islamic Azad University, Arsanjan branch, Fars Province. The experiment was carried out in a factorial in completely randomized design with three replications. The bio-fertilizers factors contain three levels of azotobacter (0, 25, and 50 gr kg-1 soil) and rhizobium (0, 20, and 40 ml kg-1 soil). The results showed that the application of azotobacter and rhizobium can be improved vegetative and reproductive characters of African marigold. The highest plant height (31 cm), sprout flower number (16 in plant), and the fastest time of flowering (31 days after sowing) were obtained with application of azotobacter bio-fertilizer at 50 gr kg-1 soil. The highest chlorophyll a pigment and Lum index were obtained with application of azotobacter at 50 gr kg-1 and rhizobium at 40 ml kg-1 soil. But, the highest Hue index was obtained without application of bio-fertilizers. Overall, to achieve the highest quality and quantity characters of African marigold flower, bio-fertilizers application of azotobacter at 50 gr kg-1 and rhizobium at 20 ml kg-1, is recommended.

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