Yield and quality response of cotton to a consortium of PGPR at graded fertilizer levels
By: M. Amjad Qureshi, M. Asif Ali, F. Mujeeb, M. J. Ahmad, S. Rashid, Sana Ullah, M. A. Anjum
Key Words: PGPR, consortium, Azotobacter, Azospirillum, Cotton
Int. J. Biosci. 10(3), 46-53, March 2017.
Biofertilizers are formulations of rhizobacteria are eco-friendly, cost effective and have potential to sustain the yields in the intensive cropping system. Plant growth promoting rhizobacteria (PGPR) have proved their worth for promoting the yield and quality traits of various crops by producing phytohormones, siderophores, antibiotics, mobilizing nutrients and inducing systemic resistance. In a series of experiment, the consortium of PGPR of Azotobacter and Azospirillum sp were tested on the yield parameters of cotton with graded levels of nitrogen (N) at Cotton Research Station, Sahiwal. Three levels of N i.e. 60, 90 and 120 kg ha-1 were applied while P was applied at 60 kg ha-1 to all the treatments. Results revealed that the bacterial consortium affected the cotton growth and yield at all N levels as compared to un-inoculated control. The maximum seed cotton yield i.e. 2478 was observed at 120 kg Nha-1 as compared to its respective control i.e. 2238 kg ha-1. The highest number of bolls plant-1 (25), boll weight (3.34 g) and plant height (126.9) were also observed at the same treatment. Results also showed that consortium of PGPR had reduced cotton leaf curl virus (CLCV) incidence up to 36.0% as compared to 41.0% without inoculation. The highest ginning out turn (GOT) and staple length was observed with PGPR consortium inoculation i.e. 38.6% and 27.8 mm as compared to un-inoculated control i.e. 37.9 % and 27.5 mm, respectively at 120 kg N ha-1. Present study clearly demonstrated that consortium of PGPR had more assenting effect on the yield components of cotton. More combination of PGPR should be used in different ecologies to validate this approach and to compensate the mineral fertilizer for sustainable agriculture.
Yield and quality response of cotton to a consortium of PGPR at graded fertilizer levels
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