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以黄土和小麦为材料,采用盆栽试验研究了Cd胁迫下施用污泥对小麦生长及富集迁移Cd的特征变化.结果表明:黄土中低水平的Cd胁迫可促进小麦的生长,高水平的Cd胁迫抑制小麦的生长;土壤中Cd临界质量分数在5 mg/kg附近.小麦各部位的Cd质量分数与土壤中的Cd质量分数呈显著正相关关系,且根系最大,茎叶次之,籽粒最小,小麦各部位对Cd的富集能力随着Cd胁迫水平的升高而先增加后减小,籽粒和茎叶的迁移能力变异性较大.
Using loess and wheat as materials, the pot experiment was conducted to study the characteristics of growth and Cd accumulation and migration in wheat under Cd stress. The results showed that low Cd levels in loess soil could promote the growth of wheat and high levels of Cd Under Cd stress, the critical mass fraction of Cd in soil was around 5 mg / kg.The Cd content in different parts of wheat was positively correlated with Cd content in soil, with the largest root, followed by stem and leaf and the smallest grain Cd accumulation in different parts of wheat increased firstly and then decreased with the increase of Cd stress, and the variability of the migration ability of grain and stem and leaf was larger.