Changes in organic carbon, available N, P_2O_5and KjO under integrated use iof organic manure, biofertiiizer and inorganic fertilizer on sustaining productivity of tomato and fertility of soil

摘要

A field experiment was conducted to study the effect of inorganic fertilizers coupled with organic manure and biofertiiizer on organic carbon, available N, P_2O_5 and K,O in soil as well as on plant growth parameters of tomato crop. Incorporation ofAzotobacter, phosphate solubilizing bacteria (PSB) and FYM alongwith inorganic fertilizers significantly improved the organic carbon content and available N, P_2O_5 and K_2O status of the soil. The highest plant height, number of leaves per plant and yieldof tomato were obtained with Azotobacter, PSB. FYM and inorganic fertilizers followed by PSB. FYM and inorganic fertilizer treated soils. The population ofAzotobacter in the native soil was less than that the PSB. Inoculated and fertilizer nitrogen added soil had maintained increased microbial population.