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VOL. 6, ISSUE 5 (2021)
Impact of soil properties and temperature on urease activity in rice soils
Authors
Muthukumararaja T, M V Sriramachandrasekharan
Abstract
Soil is the main reservoir of nutrients from which plants absorb them directly for their growth and proper development. The biological activity of the soil is evaluated mainly on the basis of the activity of four enzymes: dehydrogenase, phosphatase, urease, and protease.The investigation of soil enzymatic activity is useful for assessment of its chemical degradation. The aim of the studies was determination of enzymatic activity (urease) of wet land rice soils. In direction to assess the influence of some physical and chemical characteristics wetland rice soils and temperature on urease activity, a lab experiment was carried out in department of soil science and Agricultural chemistry, Faculty of Agriculture, Annamalai University.Twenty three soil samples were selected from different wetland rice soils of veeranum ayacut in Chidambaram Taluk. Urease activities range from 100.1 to 372.2 and 325 to 664 µgNH4released/g soil/2hr at 15° and 25°C, respectively. A significant positive correlation (r = 0.096 at 15°C and 0.126 at 25°C) was observed between urease activity and soil pH reaction by quadratic ** ** regression equations. Relation of organic carbon with urease activity was generally quadratic correlated highly significantly with urease activity, with r values of 0.008 and 0.038 at 15°C and 25°C, respectively. While soil total N and Clay content were best described by linear regression equations. However, some of r values debilitatedgradually with decline in temperature.
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Pages:1426-1428
How to cite this article:
Muthukumararaja T, M V Sriramachandrasekharan "Impact of soil properties and temperature on urease activity in rice soils ". International Journal of Botany Studies, Vol 6, Issue 5, 2021, Pages 1426-1428
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