RELATIVE IMPACT OF DIFFERENT FERTILIZER TREATMENTS UPON PHYSICO-CHEMICAL AND MYCOFLORAL DIVERSITY IN AGRICULTURAL SOIL OF RICE FIELD IN HARIDWAR, UTTARAKHAND
Raushani Raj* and Namita Joshi
Department of Environmental Sciences, Kanya Gurukula Campus,
Gurukula Kangri Vishawavidyalaya, Haridwar (Uttarakhand), India.
Received: 03-01-2019 Accepted: 21-04-2019
The present study assessed the effect of different fertilizer treatments on the physico-chemical and mycofloral diversity in agricultural field of rice in Haridwar for two consecutive years 2016 and 2017. Three different agricultural plots of rice were selected for the present investigation. A total of 25 species of 14 genera were isolated from all the three differently treated plots out of which 10 species were observed from control plot (T1), 11 species were identified from chemically treated plot (T2) and the highest fungal diversity wit 18 species were isolated from T3 plot which was maintained with combined use of organic and inorganic fertilizer. Gliocladium viride was dominant species in T1 plot while Helminthosporium solani followed by Rhizoctonia solani showed its dominancy in T2 plot which are considered as highly pathogenic fungi for rice plant. Trichoderma hamatum was the most dominant species in T3 plot. It showed positive correlation with some soil physico chemical parameters like moisture
content, organic carbon, P and K. Its correlation in the soil serve as a pointer to the status of soil health as the genus Trichoderma has many species with biocontrol potential for crop pathogens. The highest crop yield was recovered from T3 plot in comparison of other plots. Combined use of FYM and NPK increased soil nutrients in rice field after 2 years when compared with other treated plots. Overall results showed that the combined application of FYM and NPK increased mycofloral diversity in rice field which helps in maintaining soil fertility for sustainable agricultural system.
Key words: Agricultural soil, Farmyard manure, Mycoflora, Rice field.