Influence of Biochar on Yield and Heavy Metal Accumulation in Roots of Brassica Rapa under Groundwater and Wastewater Irrigation
Influence of Biochar on Yield and Heavy Metal Accumulation in Roots of Brassica Rapa under Groundwater and Wastewater Irrigation
Feroza Haider1,2, Shamim Gul2,3*, Javaid Hussain4, Sadaf Asalam Ghori5, Muhammad Naeem Shahwani6, Muhammad Murad6 and Abdul Manan Kakar7
ABSTRACT
The present study investigated the influence of wood-derived and cow manure-derived biochars on the crop growth performance and accumulation of chromium, iron, manganese and zinc in the edible parts (roots) of Brassica rapa (turnip) under groundwater and wastewater irrigation. Biochars were applied at 0.25, 0.5 and 1 kg m-2 to soil. Amendment of biochar increased significantly the aboveground plant biomass by 28% - 34.3% under groundwater and 18.3% - 30.4% under wastewater irrigation. Dry weight of root biomass increased by 16.1% - 20.2% under groundwater and by 21% - 31.2% under wastewater irrigation in response to biochar amendment. Wood-derived biochar at higher application rates and manure-derived biochar at all application rates showed significant influence on crop growth performance of B. rapa. Wood-derived biochar at all application rates and manure-derived biochar at higher application rate reduced significantly the concentration of iron and zinc in roots of B. rapa.
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