中国稻米

中国稻米

• 专论与研究 • 上一篇    下一篇

一种土壤改良剂对土壤有效态镉及糙米镉含量的影响初探

  1. 1湖南农业大学农学院/南方粮油作物协同创新中心，长沙 410128；2 湖南科陆普有限责任公司，长沙 410128
  • 出版日期:2019-09-20 发布日期:2019-09-20
  • 基金资助:

    国家水稻产业技术体系栽培与土肥岗位专家项目（CARS-01）

Preliminary Study on the Effects of Soil Modifier on Available Cd in Soil and Cadmium Content in Brown Rice

  • Online:2019-09-20 Published:2019-09-20

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摘要：

为探明改良剂纽翠绿良田宝C系列生态基肥在镉（Cd）污染稻田中的应用效果，于2017年开展盆栽试验和大田试验，研究了这种改良剂对土壤有效镉和糙米镉含量的影响。盆栽试验结果表明，与对照相比，添加改良剂后土壤pH值显著提高0.28~0.68个单位，土壤有效态Cd含量、茎叶中Cd的含量和穗中Cd的含量分别下降13.71%~30.07%、20.51%~48.72%和2.82%~73.50%，改良剂用量越大降镉效果越好。大田试验结果表明，与不施用改良剂的对照相比，施用改良剂能有效降低糙米的Cd含量，降幅为28.02%～36.35%。可见，在镉污染稻田中施用纽翠绿良田宝C系列生态基肥能有效提高土壤pH值和降低土壤Cd的有效性，从而降低水稻植株和糙米Cd的含量。

关键词: 水稻, 镉, 土壤改良剂, 糙米

Abstract:

In order to explore the application effects of soil modifier in cadmium-contaminated paddy fields, a pot experiment and field experiment was conducted with different application amount of soil modifier in 2017. The results of pot experiment showed that, compared to the control, using soil modifier could  increase the pH value of soil by 0.28~0.68 units, decrease the effective Cd content in the soil by 13.71%~30.07%, decrease the Cd content in stem and leaf by 20.51% to 48.72%, and decrease the Cd content in ear by 2.82% to 73.50%. The higher the dosage of soil modifier, the better the effect of reducing cadmium. The field test results showed that the cadmium content in brown rice was reduced by 28.02% ~ 36.35% by using soil modifier, compared to the control. It can be seen that the use of amendments in cadmium-contaminated paddy fields could effectively increase the soil pH value and reduce the effective Cd content in the soil, thereby reducing the cadmium content in rice plants and further reducing cadmium content in brown rice.

Key words: rice, cadmium, soil modifier, brown rice

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