Influence the status of soil chemical and biological properties by intercropping (original) (raw)

Background Intercropping systems significantly influence chemical and biological properties of the soil. Our objective was to evaluate the effects of intercropping systems on soil organic carbon (SOC), total Kjeldahl nitrogen (TKN), available N, P and K, soil microbial biomass carbon (MB C) and microbial biomass nitrogen (MB N) under geranium (Pelargonium graveolens L.)-based intercropping systems. Results Geranium-based intercropping (with cereals, pulses, fodder, and vegetables) resulted in increase of SOC and TKN by 7.8-69.2 % and 10.7-92.8 %, respectively, over geranium alone. Similarly, microbial respiration was higher under geranium intercropped with oat (36.3 %) followed by wheat (30.5 %) and barley (12.5 %) as compared to that under geranium alone. Soil MB C accounted for 3.3-4.7 % of SOC content and soil MB N accounted for 3.1-3.5 % of TKN under different intercropping conditions. A higher CO 2 evolution rate and a wider soil MB C / MB N ratio were recorded with cereals and fodders. Conclusions It is concluded that the build-up of the organic matter and enhancement of soil MB C in the intercropping study should promote long-term stability of soil health.