Conservation agriculture effects on aggregates carbon storage potential and soil microbial community dynamics in the face of climate change under semi-arid conditions: A review
SP Singh, RK Naresh, Vivek, Sudhir Kumar, Vineet Kumar, NC Mahajan, Kancheti Mrunalini, M Sharath Chandra and KS Krishna Prasad
Soil organic carbon plays the crucial role in maintaining soil quality. The impact carbon and nitrogen dynamics and rate of SOC sequestration in tillage and crop residue application is still in investigation in this environment. The soil organic carbon build up was affected significantly by tillage and residue level in upper depth of 0-15 cm but not in lower depth of 15-30 cm. Higher SOC content of 19.44 gkg-1
of soil was found in zero tilled residue retained plots followed by 18.53 g kg-1 in permanently raised bed with residue retained plots. Whereas, the lowest level of SOC content of 15.86 g kg-1
of soil were found in puddled transplanted rice followed by wheat planted under conventionally tilled plots. Zero tilled residue retained plots sequestrated 0.91gkg-1
SOC which was 22.63% higher over the conventionally tilled residue removed plots after seven seasons of experimentation. Soil microbial biomass carbon (SMBC) was highest (66.05 μg g-1
) in treatments FYM @10 ton ha-1
+PSB + Azotobactor and it was lowest (51.71μgg-1
) in treatments having farmers’ practices. Microbial biomass carbon significantly increased with the integrated application of organic manure (FYM @ 10 tonnes ha-1
) and mineral fertilizer (100% NPK) over control. Development of management practices that favour C sequestration or prevent further losses will help to reduce the potential SOC decline due to the climate change and because of the importance of SOC to soil health and plant productivity, maintenance or restoration of SOC will help to reduce the threats of food security due to climate change. Enhancing the soil organic carbon pool also improves agro-ecosystem resilience, eco-efficiency, and adaptation to climate change.
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SP Singh, RK Naresh, Vivek, Sudhir Kumar, Vineet Kumar, NC Mahajan, Kancheti Mrunalini, M Sharath Chandra and KS Krishna Prasad. Conservation agriculture effects on aggregates carbon storage potential and soil microbial community dynamics in the face of climate change under semi-arid conditions: A review. J Pharmacogn Phytochem 2019;8(2):59-69.