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取韶关矿区典型Cd污染菜地土壤,采用盆栽试验研究不同田间持水量(40%和80%)对菜心和蕹菜产量及Cd吸收积累的影响,结果表明:提高土壤田间持水量能显著提高土壤p H值和蔬菜产量,降低蔬菜中的Cd含量。在2种Cd水平(土壤Cd含量4.00 mg/kg、8.00 mg/kg)下土壤田间持水量80%的处理比土壤田间持水量40%的处理,菜心分别增产60.0%和101.8%,菜体Cd含量分别降低23.0%和168.4%;蕹菜分别增产148.0%和137.8%,菜体Cd含量分别降低136.4%和214.8%。在2种Cd水平下,蔬菜的Cd含量均与土壤p H值呈极显著负相关。
The typical Cd contaminated vegetable soil in Shaoguan mining area was taken. The pot experiment was conducted to study the effects of different water holding capacity (40% and 80%) on the yield and Cd uptake of Brassica campestris and Brassica chinensis. The results showed that increasing soil water holding capacity Soil p H value and vegetable yield, reduce the content of Cd in vegetables. The treatments of 80% soil water holding capacity and 40% soil water holding capacity at two Cd levels (soil Cd content 4.00 mg / kg, 8.00 mg / kg) increased yield by 60.0% and 101.8%, respectively, Cd content decreased by 23.0% and 168.4% respectively, while the yield of Brassica chinensis increased by 148.0% and 137.8% respectively, while the Cd content decreased by 136.4% and 214.8% respectively. Under the two kinds of Cd levels, Cd content in vegetables showed extremely significant negative correlation with soil p H value.