污水灌溉对小麦和玉米的重金属积累和分布的影响

通过对邯郸市5种水质灌区的作物中重金属含量测定,结果发现:中水灌溉和井水灌溉对重金属在作物中积累影响最小,无论何种水质灌溉,4种重金属在作物中积累趋势为Zn>Pb>Cu>Cd,分布趋势基本为根大于茎和籽粒,作物体内铅和镉含量超标.分析表明,只要对污水进行铅和镉适当处理,用中水灌溉是可行的.

Affection of Heavy Metals Accumulation and Distribution in Plant under Sewage Irrigation

Contents of heavy metals plant were measured and analyzed through sampling and chemical test in different Sewage Irrigation Areas in Handan,irrigated by five different sewage respectively in this paper.The result shows that the different sewage irrigation affected the heavy metals accumulation and distribution differen-tly.Elementary reflection is that the effect of the well water irrigation and reclaimed water irrigation to the heavy metals accumulation in plant is lest.No mater what,the tendency of four heavy metals accumulation in plant is Zn > Pb > Cu > Cd and distribution tendency is root > stalk > seed.The content of Pb and Cd in plant l exceeded the value of the Irrigation Standards slightly.the result is that irrigation with reclaimed water was feasible,as long as Pb and Cd in sewage were dealt with.