Indexing

Influence of Conservation Agriculture on Soil Microbial Indices Contributing to Soil Carbon Sequestration in Rice Crop

Author: Bhagwan Singh Dhaked, Geeta Singh and T.K. Das

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Abstract

A long term (2008-2020) field experiment was conducted adopting various management approaches in a rice-wheat cropping system. The aim was to understand the impact of alternate tillage and agri -resource management on indices related to soil health namely the microbial biomass Carbon (SMBC), respiration and dehydrogenase enzyme activity. The treatment combinations applied were Zero-Tillage (ZT), Conventional tillage (CT) along with brown manure (BM), crop residues (CR), and moong bean (MB). Soil microbial parameters were studied from soil samples collected from two depth (0-15, 15- 30cm) at the wheat flowering and harvest. ZT +CR had maximum soil respiration and minimum dehydrogenase activity. Dehydrogenase, was maximum in ZT +CR+BM. CTR – ZTW had higher SMBC. ZT had lower soil respiration, SMBC and higher dehydrogenase activity. ZT+BM had higher soil respiration, SMBC and lower dehydrogenase activity. ZT+CR had higher soil respiration. ZT+MB had higher soil respiration, SMBC and low

Keywords

Conservation agriculture, Soil carbon sequestration, tillage, soil microbial indices.

Conclusion

Soil microbial parameters were studied from soil samples collected from two depth (0-15, 15- 30cm) at the wheat flowering and harvest. ZT +CR had maximum soil respiration and minimum dehydrogenase activity. Dehydrogenase, was maximum in ZT +CR+BM. CTR – ZTW had higher SMBC. ZT had lower soil respiration, SMBC and higher dehydrogenase activity. ZT+BM had higher soil respiration, SMBC and lower dehydrogenase activity. ZT+CR had higher soil respiration. ZT+MB had higher soil respiration, SMBC and lower dehydrogenase activity. Soil respiration, beta-glucosidase had higher value at 15-30 cm soil depth than 0-15 cm soil depth. DHA, SMBC had higher value at 0-15 cm soil depth than 15-30 cm soil depth. Soil respiration, DHA, SMBC had higher value at flowering than at harvest.

References

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How to cite this article

Bhagwan Singh Dhaked, Geeta Singh and T.K. Das (2022). Influence of Conservation Agriculture on Soil Microbial Indices Contributing to Soil Carbon Sequestration in Rice Crop. Biological Forum – An International Journal, 14(1): 1103-1110.