Journal of Pure and Applied MicrobiologyVol. 8 No. May 2014 Special Edition

Dynamics of Soil Microbial Biomass and Enzyme Activities at Different Developmental Stages of Tomato

Ningning Ma1,2, Mingfang Qi2 and Tianlai Li2*

1State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang - 110016, China. 2College of Horticulture, Shenyang Agricultural University, Shenyang - 110161, China.

Received on 12 April 2014 and accepted on 09 May 2014

 

ABSTRACT

A pot experiment was conducted to study the dynamics of soil microbial biomass carbon, soil microbial biomass nitrogen, soil enzyme activities in the rhizospheric soil at different developmental stages of tomato under greenhouse conditions. It was evident that the tomato plants had significant rhizospheric effects on soil microbial properties. Soil microbial biomass carbon and nitrogen significantly decreased in the initial fruiting stage and early blossoming stage, respectively, following increased gradually and reach a maximum at the full bearing period, and then gradually decreased. During the whole growing season, rhizospheric soil invertase, urease and neutral phosphatase activities first increased and then decreased. At the late stage of tomato, soil microbial biomass and enzyme activities decreased. Significant correlations between soil microbial biomass and invertase, urease and neutral phosphatase activities, but less correlation was found between microbial biomass and hydrogen peroxidase activity.

Keywords : Tomato, Soil microbial biomass, Soil enzyme activities.