Exploration of novel rhizospheric yeast isolate as fertilizing soil inoculant for improvement of maize cultivation.

Journal of the science of food and agriculture

PubMedID: 25065763

Mukherjee S, Sen SK. Exploration of novel rhizospheric yeast isolate as fertilizing soil inoculant for improvement of maize cultivation. J Sci Food Agric. 2014;.
BACKGROUND
Chemical input in agriculture is a common practice, but makes a serious impact to the environment. In this context, the soil isolates, having multiple plant growth promoting attributes have been studied. The isolates were tested for their PO4 and Zn solubilization, IAA production and N2 fixation ability. The selected isolate SSm-39 was characterized up to molecular level. The isolate SSm-39 was applied for maize cultivation in different combination with chemical fertilizers. Also, the chemical and microbial status of soil, its effect on maize growth and yield were investigated.

RESULTS
The isolate SSm-39 found most suitable for its PGP attributes and identified as Candida tropicalis. The inoculant (100%) with reduced dose of chemical fertilizer (T5) application notably increased the growth and yield performances of maize. It has improved the grain quality by 85% indicated through carbohydrate and protein content, in comparison to uninoculated control (T3). Soil nutrient status, was found to increase by two fold with the T5 treatment than with the T3 treatment. Enhanced soil nutrient quality supported microbial growth and diversity, thus accelerated the soil enzymatic activities.

CONCLUSION
The results validate the multiple PGP traits of C. tropicalis SSm-39, advocating reduction of chemical fertilizer for maize cultivation.