National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Soil enzymes play a major role in mineralization of nitrogen, phosphorus and sulphur. mineralization is the process of transformation of organically bound elements into mineral form which will readily taken up by plants and is crucial to plant nutrition and indirectly plays a role agriculture productivity. The enzyme phosphatase plays an important role in providing the plant its nutrition. In most soils, the organically bound P- fraction is higher than the inorganic. Phosphorus uptake by plants requires mineralization of the organic P component by phosphatases to available form. Phosphatases are inducible enzymes that are produced predominantly under conditions of low phosphorus availability. Phosphatases are excreted by plant roots and by microorganisms. Microbial phosphatases dominate in soils. The activity of phosphatase in soil is influenced by the temperature. The abiontic enzymes present in the soil play an important role in catalyzing several important reactions necessary for the life processes of microorganisms in soils and their by stabilizing soil structure, the decomposition of organic wastes, organic matter formation and nutrient cycling. When the temperatures are increased due various changes caused by global warming and other aspects they have a profound influence on soil enzymes and indirectly on agricultural productivity. Every enzyme has its own optimum temperature below the optimum temperature the enzyme activity is less due to inactivation and above the optimum temperature the enzyme activity decreases due to denaturation. Due to increase in temperature the enzymes are denatured and nutrients availability is decreasing and indirectly effecting productivity. To study the effect of temperature on soil enzyme activity four different soils samples were collected and incubation studies were carried out at different temperatures ranging from 20 oC to 90oC with two Alfisols and two Vertisols. The enzyme activity ranged from 9.2 to 297.5 (µg of 4-nitrophenol g-1 soil h-1)
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