RESEARCH JOURNAL OF BIOTECHNOLOGY, vol.17, no.7, pp.16-22, 2022 (ESCI)
This study aims to determine the Cd accumulation levels of rapeseed (Brassica napus L.) based on nitrogen (N) (0, 100, 200 and 400 mg kg(-1)) and Cd (0, 1.5, 3 and 6 mg kg(-1)) applications to the soil on pot trials conducted under controlled environmental conditions. The highest chlorophyll content was obtained at 400 mg N kg(-1) without Cd. The highest dry weight amount in rapeseed was obtained with the application of 100 mg N kg(-1) x 1.5 mg Cd kg(-1), however, the highest rates of both N and Cd resulted in the lowest dry weight. In 400 mg N kg-1 x 6 mg Cd kg(-1) (131 mg Cd kg(-1)) and 200 mg N kg(-1) x 6 mg Cd kg(-1) (113.80 mg Cd kg(-1)) applications, Cd concentration of the rapeseed was determined to be higher than critical Cd hyperaccumulation level. The capacity of Cd uptake and accumulation in rapeseed shoots were enhanced with N applications, thus promoting the phytoextraction of Cd from Cdcontaminated soils. Cadmium rates did not affect Fe, Cu, Mn and Zn uptake levels when N was not applied.