Abstract
A field experiment was conducted on trace metal contaminated soil at Patratu (Ramgarh) to study the effect of lime, compost, plant growth promoting rhizobacteria and arbuscular mycorrhizal fungi on micronutrient removal viz. Zn, Cu, Mn and Fe in mustard-maize cropping system. Results reveal that inoculation with Glomus mossae, Pseudomonas striata and Azotobacter chroococcum increased Zn concentration to the extent 13 to 32, 10 to 24 and 9 to 24 (%), respectively over control. Copper, manganese and iron uptake followed almost similar trend as that of Zn. Microbial inoculants with or without vermicompost increased the trace metal removal, however, vermicompost alone decreased the removal. It was observed that microbial inoculations reduced the total Zn, Cu, Mn and Fe content in soil. However, available micronutrients were significantly reduced by microbial inoculation and amendments.
Highlights
Trace metals are ubiquitous in the environment and present in small amounts in normal condition.Contamination of trace metals refers to their anthropogenic accumulation, which may or may not inflict any harm to the system or organism
Inoculation of Glomus mossae resulted in significantly higher removal of Zn by mustard stover (114g ha-1), grain (44g ha-1), mustard (158g ha-1) and maize straw (397g ha-1)
It was observed that microbial inoculations reduced the total Zn in soil to the extent of 8 to 15 per cent as compared to control
Summary
Trace metals are ubiquitous in the environment and present in small amounts in normal condition.Contamination of trace metals refers to their anthropogenic accumulation, which may or may not inflict any harm to the system or organism. The present investigation was planned to study the effect of amendments and microbial inoculants on micronutrient removal by mustard-maize cropping system in trace metal contaminated soil. Inoculation of Glomus mossae resulted in significantly higher removal of Zn by mustard stover (114g ha-1), grain (44g ha-1), mustard (158g ha-1) and maize straw (397g ha-1).
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