Microbial response of distinct soil types to land-use intensification at a South-Indian rural-urban interface

Abstract Aims Rural-urban dynamics are leading to agricultural intensification practices, which affect microbial ecosystem functions in a soil-specific way. This study aimed investigate what effects has on soil communities. Methods The of N fertilization level (low and high) crop type (maize finger millet) communities were investigated, using two-factorial split-plot design, at two fields (irrigated rainfed) typical types (Nitisol Acrisol) mimicking an gradient the rural-urban interface Indian Megacity Bangalore. Results Nitisol had higher pH clay content than Acrisol. In combination with irrigation, this led aboveground plant biomass (APB), organic carbon (SOC), (MB), fungal ergosterol necromass. High APB resulted low total P content, due export high C/P MB-C/P ratios Nitisol. Crop did not parameters irrigated Nitisol, whereas affected MBP basal respiration rainfed Particulate matter (POM) was major explanatory factor for most both soils. Acrisol, drought reduced metabolic demand, counteracted negative MB. indicated by similar quotients MBC/SOC Conclusions These results indicate current need water high-quality fresh inputs improve contribution fertility