干旱区生态环境知识资源中心

A study was conducted to determine growth and uptake of Cd by Populus deltoides (poplar) under different irrigation regimes. Three types of irrigation water i.e. municipal wastewater (MW), domestic wastewater (DW) and canal water (CW) was applied to the plants. P. deltoides gained maximum plant height (4.40m) under DW irrigation which was 35% and 37% higher than the heights gained under MW (2.85 m) and CW (2.76 cm), respectively. Similarly, average collar diameter in response to DW irrigation (7.41 cm) was also 22% and 34% higher than the diameters gained under MW irrigation (5.81 cm) and CW (4.92 cm). The growth response clearly suggested that wastewater coming either from municipal or domestic source might add nutrients to the soil pool. Maximum diameter under DW was due to highly favourable status of nutrients, organic matter and moderate level of pollutants. Higher uptake of Cd metal (47.02 mg kg(-1)) in plant was observed mostly under MW followed by DW (39.65 mg kg(-1)). While, the contribution of CW regarding Cd uptake (30.19 mg Kg(-1)) by the tree species was significantly low.