Mounissamy Vassanda Coumar, Kundu Samaresh, Selladurai Rajendiran, Saha Jayanta Kumar, Biswas Ashish Kumar, Adhikari Tapan, Patra Ashok Kumar
ICAR-Indian Institute of Soil Science, Nabibagh, Berasia Road, Bhopal, 462038, India.
Bull Environ Contam Toxicol. 2017 Nov;99(5):625-632. doi: 10.1007/s00128-017-2173-8. Epub 2017 Sep 9.
An incubation study was undertaken to study microbial resilience capacity of acid soil amended with farmyard manure (FYM), charcoal and lime under copper (Cu) perturbation. Copper stress significantly reduced enzymatic activities and microbial biomass carbon (MBC) in soil. Percent reduction in microbial activity of soil due to Cu stress was 74.7% in dehydrogenase activity, 59.9% in MBC, 48.2% in alkaline phosphatase activity and 15.1% in acid phosphatase activity. Soil treated with FYM + charcoal showed highest resistance index for enzymatic activities and MBC. Similarly, the highest resilience index for acid phosphatase activity was observed in soil amended with FYM (0.40), whereas FYM + charcoal-treated soil showed the highest resilience indices for alkaline, dehydrogenase activity and MBC: 0.50, 0.22 and 0.25, respectively. This investigation showed that FYM and charcoal application, either alone or in combination, proved to be better than lime with respect to microbial functional resistance and resilience of acid soil under Cu perturbation.
开展了一项培养研究，以研究在铜（Cu）干扰下，用农家肥（FYM）、木炭和石灰改良的酸性土壤的微生物恢复能力。铜胁迫显著降低了土壤中的酶活性和微生物生物量碳（MBC）。由于铜胁迫导致的土壤微生物活性降低百分比在脱氢酶活性中为74.7%，在MBC中为59.9%，在碱性磷酸酶活性中为48.2%，在酸性磷酸酶活性中为15.1%。用FYM + 木炭处理的土壤对酶活性和MBC表现出最高的抗性指数。同样，在用FYM改良的土壤中观察到酸性磷酸酶活性的最高恢复指数（0.40），而用FYM + 木炭处理的土壤对碱性、脱氢酶活性和MBC表现出最高的恢复指数，分别为0.50、0.22和0.25。这项研究表明，就铜干扰下酸性土壤的微生物功能抗性和恢复能力而言，单独或联合施用FYM和木炭比施用石灰效果更好。
