P. Bhattacharyya

Bio: P. Bhattacharyya is an academic researcher. The author has contributed to research in topics: Soil water & Soil organic matter. The author has an hindex of 1, co-authored 1 publications receiving 4 citations.

Influence of soil properties on fluorescein diacetate hydrolyzing activity under different agro-ecosystems

Abstract: Fluorescein diacetate hydrolyzing activity (FDHA) of soils, both in field moist and air dried, of different agro-ecosystems in alluvial soil was studied. Field moist soils recorded higher values than in air-dried soils, but they showed significant positive correlation (0.93∗∗). FDHA in both soil pretreatments showed positive correlation with organic matter (0.98∗∗ for field moist soil and 0.92∗∗ for air-dried soil) and clay content (0.85∗∗ for field moist soil and 0.82∗ for air-dried soil) of the soils. Multiple regression analysis showed that the stabilization of FDHA in the studied soils was due to organic matter-enzyme complex. Among the organic matter fractions, humus C plays dominating role to control the FDHA of the soils.

Parthenium hysterophorus L. (Asteraceae) invasion had limited impact on major soil nutrients and enzyme activity: Is the null effect real or reflects data insensitivity?

Abstract: Parthenium hysterophorus L. (Asteraceae) is an annual weed of worldwide significance in grasslands and riparian corridors. In view of the invasibility and known allelochemical properties exhibited by its presence in a given habitat, the weed is hypothesized to change soil properties significantly.

Seasonal Dynamics of Enzymetic Activities and Functional Diversity in Soils under Different Organic Managements

Abstract: Soil microbial activity and diversity are affected by organic sources applied to improve soil quality and fluctuate seasonally. We investigated the effects of municipal compost (MC), poultry litter (PL), and cover crops of spring oats and red clover (RC) on soil enzyme activities, and soil bacterial community-level physiological profiling (CLPP) in a Mexico silt loam in North Central Missouri, USA. Temporal patterns of these parameters were observed by periodic five soil sampling from spring to fall over a two year period. MC increased soil dehydrogenase (DH) activity consistently beginning about three months after MC application; fluorescein diacetate (FDA) hydrolytic activity significantly began to increase by the September of the first year but fluctuated during the following period. DH activity responded more directly to the amount or properties of organic residues in soils while FDA hydrolysis and CLPP were generally influenced by composition of organic sources, and enzyme activities and CLPP showed seasonal variation, which depended on organic sources and soil moisture. MC and cover crops may be useful organic sources for enhancing general soil microbial activity and altering soil microbial diversity, respectively. Because microbial activities and diversity are dynamic and subject to seasonal changes, the effects of organic amendments on these parameters should be investigated frequently during a growing season.