Municipal sewage sludge, aquatic weed compost on soil enzymatic activity and heavy metal accumulation in Kale (Brassica oleracea L.)

Abstract Enormous quantities of organic wastes such as sewage sludge (SS) and aquatic weed compost (AWC) are produced in large on the banks Dal Lake Kashmir. It is a challenging task for authorities to manage them properly. Therefore, study’s purpose was evaluate these agricultural use potential. The experiment laid out randomized complete block design with three replications comprised nine treatment combinations SS, AWC inorganic fertilizers. In present study, conjoint SS chemical fertilizer recorded maximum build-up soil microbial biomass carbon (MCB), urease dehydrogenase activity T 1 . There were significant correlations between MCB from ( r 2 = 0.95 0.97; P < 0.05), respectively. micronutrient heavy metal concentrations kale exposed significantly higher than those untreated plants, highest concentration found sole application (T 7 ). However, within acceptable limits did not overcome phytotoxic levels. finding leads conclusion that along fertilizers ) can improve enzymatic soil, quality parameters nutrient content plants thereby enhancing yield.