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中国农学通报

中国农学通报 ›› 2024, Vol. 40 ›› Issue (36): 102-109.doi: 10.11924/j.issn.1000-6850.casb2024-0297

• 资源·环境·生态·土壤 • 上一篇    下一篇

基施土壤调理剂对土壤Cd钝化和水稻Cd吸收的影响

袁海伟1,2(), 姜兴华1,2, 唐守寅1,2, 胡露1,2(), 罗绪锋2,3, 曾鹏2,3, 辜娇峰2,3, 周航2,3   

  1. 1 环保桥（湖南）生态环境工程股份有限公司，长沙 410205
    2 湖南省土壤污染修复与固碳工程技术研究中心，长沙 410004
    3 中南林业科技大学生命与环境科学学院，长沙 410004
  • 收稿日期:2024-04-26 修回日期:2024-08-24 出版日期:2024-12-23 发布日期:2024-12-23
  • 通讯作者:
    胡露，女，1991年出生，湖南娄底人，高级工程师，硕士，研究方向：土壤污染防治研究。通信地址：410205 湖南省长沙市湘江新区兴工国际产业园1栋402 环保桥（湖南）生态环境工程股份有限公司，Tel：0731-82186279，E-mail：。
  • 作者简介:

    袁海伟，男，1983年出生，河南开封人，高级工程师，硕士，研究方向：土壤污染防治研究。通信地址：410205 湖南省长沙市湘江新区兴工国际产业园1栋402 环保桥（湖南）生态环境工程股份有限公司，Tel：0731-82186279，E-mail：。

  • 基金资助:
    芙蓉计划湖南省企业科技创新创业团队项目(2023-HBQ)

Effects of Basic Application of Soil Amendment on Soil Cd Passivation and Rice Cd Accumulation

YUAN Haiwei1,2(), JIANG Xinghua1,2, TANG Shouyin1,2, HU Lu1,2(), LUO Xufeng2,3, ZENG Peng2,3, GU Jiaofeng2,3, ZHOU Hang2,3   

  1. 1 Hunan Huanbaoqiao Ecology and Environment Engineering Co., Ltd., Changsha 410205
    2 Hunan Provincial Soil Pollution Remediation and Carbon Fixation Engineering Technology Research Center, Changsha 410004
    3 College of Life and Environmental Sciences, Central South University of Forestry and Technology, Changsha 410004
  • Received:2024-04-26 Revised:2024-08-24 Published:2024-12-23 Online:2024-12-23

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摘要：

通过选取湖南省衡阳市肖家镇金星村和牛岭村两处不同质地的Cd污染稻田土壤，开展为期3 a的大田试验，旨在探究土壤调理剂对改善土壤pH、降低土壤有效态Cd含量以及减少水稻糙米中Cd积累的效果。结果显示，连续3 a基施土壤调理剂（2250 kg/hm2和3000 kg/hm2），显著提升了2村Cd污染稻田土壤的pH，并有效降低了土壤中有效态Cd浓度，降幅分别为14.1%~50.0%和16.9%~49.4%。此外，连续3 a基施土壤调理剂还显著促进了水稻产量增加，同时降低了糙米中Cd含量，其降幅分别为40.4%~62.9%和40.0%~64.1%。特别地，在施加3000 kg/hm2土壤调理剂的情况下，2地所产稻谷中的Cd含量均低于国家安全食用标准(GB2762—2022) 规定的限值，仅为0.15~0.18 mg/kg。经济效益分析表明，此处理方式可使农户净收入分别增加1603~2912元/hm2和2282~3408元/hm2。综上所述，通过向轻度Cd污染稻田施加适量土壤调理剂是一种可行且有效的修复技术，有助于保障农产品质量安全并提高农民经济收益。

关键词: 土壤调理剂, Cd污染土壤, 水稻, 农田修复, 经济效益, 食品安全

Abstract:

To study the effect of the application of soil amendment on the Cd availability in soil and the Cd content in brown rice, a continuous three-year field experiment was conducted in two different textures of Cd contaminated paddy soil in Xiaojia Town, Hengyang City, Hunan Province. The results indicated that: (1) continuous application of soil amendment (2250 kg/hm2 and 3000 kg/hm2) for three years significantly increased the paddy soil pH in Jinxing Village and Niuling Village, and reduced the content of available Cd in soil by 14.1%-50.0% and 16.9%-49.4%, respectively; (2) continuous application of soil amendment for three years significantly increased the rice yield in Jinxing Village and Niuling Village, and reduced the Cd content in brown rice by 40.4%-62.9% and 40.0%-64.1%, respectively. Moreover, the Cd content in brown rice in both areas was 0.15-0.18 mg/kg under the treatment of applying 3000 kg/hm2 amendment, lower than the National Standards for Food Safety (GB2762—2022); (3) the net income of farmers in both areas increased significantly by 1603-2912 and 2282-3408 yuan/hm2, respectively, under the treatment of applying 3000 kg/hm2 amendment. Therefore, the application of soil amendment was a remediation technology that can achieve safe production in mildly Cd contaminated paddy soil.

Key words: amendment, Cd contaminated soil, rice, soil remediation, economic benefit, food safety