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粉煤灰和碳酸钙对As(Ⅲ)污染土壤上小麦产量性状及麦株As含量的影响

Keywords: 小麦,As(Ⅲ),污染,粉煤灰,碳酸钙,产量,含量

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Abstract:

随着经济的发展,土壤As污染问题日益严重。采用露天盆栽试验方法,研究了在As(Ⅲ)污染土壤上,添加粉煤灰和碳酸钙对小麦成熟期产量及其性状、小麦根、茎叶和籽粒As含量的影响,并探讨了粉煤灰和碳酸钙对土壤As(Ⅲ)污染修复的有效方法。结果表明,在土壤中添加100g·kg-1的粉煤灰或1.0g·kg-1的碳酸钙能使小麦株高、结实小穗数、穗粒数、千粒重和产量增加。与对照相比,在As(Ⅲ)污染土壤上,100g·kg-1的粉煤灰处理显著地增加了小麦产量(P<0.05),极显著地降低了小麦籽粒As含量(P<0.01);1.0g·kg-1的碳酸钙处理极显著地增加了小麦的穗粒数、千粒重和产量(P<0.01),显著地降低了根中As含量(P<0.05),极显著地降低了籽粒As含量(P<0.01)。因此,在As(Ⅲ)污染土壤上,添加100g·kg-1的粉煤灰或1.0g·kg-1的碳酸钙能使小麦产量升高,籽粒As含量下降,有效地缓解As(Ⅲ)对小麦的毒害。

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