Incessant application of chemical fertilizers to the agricultural fields may alter the composition and activities of soil microbiota.Thus,the shift of cultivation practices from chemical to organic is considered to be...Incessant application of chemical fertilizers to the agricultural fields may alter the composition and activities of soil microbiota.Thus,the shift of cultivation practices from chemical to organic is considered to be the need of the hour in order to maintain soil health.A study was conducted in the agricultural fields of the University of Burdwan,India to observe the impact of organic manure on the rhizosphere bacterial community.The experiments were conducted on maize plants,supplemented with the recommended dose of chemical fertilizer and organic manure(vermicompost and cow dung mixture).Corresponding changes in the plant phenological events and soil health in terms of soil physico-chemical factors and rhizosphere bacterial groups up to the level of CFU g-1×105 dry soil was noted.The results showed a significant increase in population of phosphate solubilizing bacteria during 30DAS.However,at 90 DAS,significant increase in the population of phosphate solubilizing bacteria,nitrifying bacteria,asymbiotic nitrogen-fixing bacteria and protein hydrolyzing bacteria was observed in the organically treated plots.The growth of rhizosphere bacteria was attributed to the type of organic manure supplied to the agricultural fields.In addition,a strong correlation was observed between Zn and protein hydrolyzing bacteria.The soil organic carbon and available nitrogen were strongly correlated with nitrifying,fat solubilizing and phosphate solubilizing groups of bacteria.展开更多
文摘Incessant application of chemical fertilizers to the agricultural fields may alter the composition and activities of soil microbiota.Thus,the shift of cultivation practices from chemical to organic is considered to be the need of the hour in order to maintain soil health.A study was conducted in the agricultural fields of the University of Burdwan,India to observe the impact of organic manure on the rhizosphere bacterial community.The experiments were conducted on maize plants,supplemented with the recommended dose of chemical fertilizer and organic manure(vermicompost and cow dung mixture).Corresponding changes in the plant phenological events and soil health in terms of soil physico-chemical factors and rhizosphere bacterial groups up to the level of CFU g-1×105 dry soil was noted.The results showed a significant increase in population of phosphate solubilizing bacteria during 30DAS.However,at 90 DAS,significant increase in the population of phosphate solubilizing bacteria,nitrifying bacteria,asymbiotic nitrogen-fixing bacteria and protein hydrolyzing bacteria was observed in the organically treated plots.The growth of rhizosphere bacteria was attributed to the type of organic manure supplied to the agricultural fields.In addition,a strong correlation was observed between Zn and protein hydrolyzing bacteria.The soil organic carbon and available nitrogen were strongly correlated with nitrifying,fat solubilizing and phosphate solubilizing groups of bacteria.
