PJB-2023-519
Assessing the effects of different shapes and rates of polyethylene microplastic on soil biological phosphorus dynamics in semi-arid soils
Komal Riaz
Abstract
Soil is essential component of terrestrial ecosystems and known to support multitude of ecological services. They are being exposed to enormous pollution pressure that can greatly affect the associated ecological functions. Microplastics (< 5mm) have now been emerged as a major environmental pollutant of global concern. Microplastics pollution of coastal and marine environments has received much attention in recent times. The extent of microplastic pollution in agroecosystem and its subsequent impact on the soil plant system is largely unknown. Our study with different set of parameters were undertaken to assess the extent of microplastic abundance in agroecosystem and its potential impacts on soil plant system. Our mechanistic framework will direct present and upcoming investigations into this crucial issue. In this investigation, polyethylene and polystyrene were chosen with three different rates (1%, 3%, and 5%) and three distinct morphological characteristics (beads, powder, and fiber). Soil microplastic abundance based on type fraction and concentration was analyzed. The study elucidated the effects of different microplastic residues of three different fraction on phyisco-chemical, biochemical and microbiological properties of soil especially plant growth, plant physiological parameters, root morphology, biological phosphorus pool, rhizosphere morphology, root exudate secretions, carboxylate secretion, enzymatic activities, soil microbial activity and soil nutrients.
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