Changes in Enzyme Activities in Salt-Affected Soils during Incubation Study of Diverse Particle Sizes of Rice Straw

Sandeep Sharma, Nihar Gupta, Anmoldeep Singh Chakkal, Neha Sharma, Saud Alamri, Manzer H. Siddiqui () and Fasih Ullah Haider
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Sandeep Sharma: Department of Soil Science, Punjab Agricultural University, Ludhiana 141004, India
Nihar Gupta: Department of Soil Science, Punjab Agricultural University, Ludhiana 141004, India
Anmoldeep Singh Chakkal: Department of Soil Science, Punjab Agricultural University, Ludhiana 141004, India
Neha Sharma: Department of Soil Science, Punjab Agricultural University, Ludhiana 141004, India
Saud Alamri: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Manzer H. Siddiqui: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Fasih Ullah Haider: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China

Agriculture, 2023, vol. 13, issue 9, 1-12

Abstract: Soil enzymes are linked to the plant–soil–enzyme–soil nutrients of the soil system, which play an important role in carbon cycling and phosphorus mineralization in soil. Monitoring soil biological quality, particularly enzyme activities, after receiving organic amendments is a prerequisite for the sustainable management of soils. An incubation study was conducted to evaluate the effect of different particle sizes of rice residue (control, powdered, 1 cm, 2 cm, 5 cm, and 10 cm) on the enzymatic activities in three soils (normal, saline, and sodic). The soils used in the study were alkaline in reaction with a pH range of 7.05–8.86 and an electrical conductivity (EC) gradient from 0.41 to 2.5 dS m −1 . Significant changes in the soil enzyme activity (dehydrogenase, fluorescein diacetate, and alkaline phosphatase) were observed with the incorporation of rice residue as compared to control. The enzymatic activities were substantially enhanced with a decrease in the size of the residue up to 28 days during the incubation period. The maximum enzymatic activity in the three soils was found to be in the order of normal > sodic > saline soils. These results suggest that the particle size of rice residues and salt levels should be considered important factors in residue decomposition in soils, as they directly influence the activity of soil enzymes for the overall improvement of the biological pools in soils.

Keywords: particle size; microbial activity; crop residue; incubation study; soil alkalinity (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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