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中国农学通报 ›› 2024, Vol. 40 ›› Issue (12): 53-58.doi: 10.11924/j.issn.1000-6850.casb2023-0067

所属专题: 土壤重金属污染

• 资源·环境·生态·土壤 • 上一篇    下一篇

施石灰和秸秆还田对清洁的酸性稻田籽粒镉含量的影响

刘磊1(), 陈晨2, 陈金3,4, 蒋末云5, 贾震1, 杨星莲1, 曾勇军1, 黄山1()   

  1. 1 教育部作物生理生态与遗传育种重点实验室/江西农业大学农学院,南昌 330045
    2 厦门海关技术中心,福建厦门 361013
    3 井冈山红壤研究所(江西省农业科学院井冈山分院),江西吉安 343016
    4 江西省农业科学院土壤肥料与资源环境研究所,南昌 330200
    5 南昌市新建区农业农村局,南昌 330038
  • 收稿日期:2023-01-29 修回日期:2023-05-15 出版日期:2024-04-25 发布日期:2024-04-22
  • 通讯作者:
    黄山,男,1983年出生,河南驻马店人,教授,博士,研究方向:农田生态。通信地址:330045 江西省南昌市新建区蛟桥镇志敏大道1101号 江西农业大学,Tel:15870628386,E-mail:
  • 作者简介:

    刘磊,男,1995年出生,江西新余人,博士,研究方向:作物高产生理与农田生态。通信地址:330045 江西省南昌市新建区蛟桥镇志敏大道1101号 江西农业大学,Tel:13170911020,E-mail:

  • 基金资助:
    井冈山农高区省级科技专项“红壤丘陵区耕地酸化阻控关键技术研究及场景应用”(20222-051246); 国家重点研发计划项目(2016YFD0300903); 江西省水稻产业技术体系专项(JXARS-02-03)

Effects of Liming and Straw Returning on Cadmium Content in Rice Grains in a Clean and Acidic Paddy Field

LIU Lei1(), CHEN Chen2, CHEN Jin3,4, JIANG Moyun5, JIA Zhen1, YANG Xinglian1, ZENG Yongjun1, HUANG Shan1()   

  1. 1 Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/College of Agriculture, Jiangxi Agricultural University, Nanchang 330045
    2 Xiamen Customs Technical Center, Xiamen, Fujian 361013
    3 Jinggangshan Institute of Red Soil/Jinggangshan Branch of Jiangxi Academy of Agricultural Sciences, Ji’an, Jiangxi 343016
    4 Soil and Fertilizer & Resources and Environment Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200
    5 Bureau of Agriculture and Rural Development of Xinjian District, Nanchang 330038
  • Received:2023-01-29 Revised:2023-05-15 Published:2024-04-25 Online:2024-04-22

摘要:

为了探究清洁的酸性稻田施用石灰对双季稻籽粒镉(Cd)含量的影响,本研究在清洁的酸性稻田(土壤pH 5.2,土壤总Cd含量 0.2 mg/kg)上开展田间定位试验,并测定籽粒镉含量,设置4个处理,分别是(1)对照,不施石灰,秸秆不还田;(2)施石灰,秸秆不还田;(3)每季秸秆全量还田,不施石灰;(4)秸秆还田配施石灰。结果表明:除2020年晚稻季外,施石灰显著降低了早、晚稻糙米Cd含量,秸秆还田对糙米Cd含量无显著影响。二者仅对2020年早稻糙米Cd含量有显著互作效应。在秸秆还田条件下,施石灰使2020年早稻糙米Cd含量降低61.0%;在秸秆不还田条件下,降幅为38.0%。施石灰显著降低了2019年早、晚稻精米Cd含量。秸秆还田仅显著增加了2020年晚稻精米Cd含量。二者对2020年晚稻精米Cd含量有显著互作效应。在秸秆还田条件下,施石灰使2020年晚稻季精米Cd含量降低38.1%;而在秸秆不还田条件下,降幅为4.2%。因此,在清洁的酸化红壤性双季稻田上,施石灰不仅可以有效减少稻米的Cd含量,而且能够降低秸秆还田导致的Cd污染风险,有利于保障稻米质量安全。

关键词: 石灰, 秸秆还田, 双季稻, 土壤酸化,

Abstract:

The study was conducted to investigate the effect of lime application on the cadmium (Cd) content in grains of double rice in a clean and acidic paddy field (soil pH 5.2, soil Cd content 0.2 mg/kg). Four treatments were set up to measure the cadmium contents in rice grains. The treatments were as following: (1) straw removal without liming as control, (2) straw removal with lime application, (3) straw returning every season without liming, (4) straw returning combined with liming. The results showed that lime application significantly reduced the Cd content in brown rice in the early and late rice season except that in the late rice season in 2020. Straw returning had no significant effects on the Cd content in brown rice. There were interactive effects between liming and straw returning on the Cd content in brown rice in the early rice season in 2020. Lime application reduced the Cd content in brown rice by 61.0% under straw returning and by 38.0% under straw removal in the early rice season in 2020. Lime application significantly reduced the Cd content in polished rice in both the early and late rice seasons in 2019. Straw returning significantly increased the Cd content in polished rice in the late rice season in 2020. There were interactive effects between liming and straw returning on the Cd content in polished rice in the late rice season in 2020. Lime application reduced the Cd content in polished rice by 38.1% under straw returning, while only by 4.2% under straw removal in the late rice season in 2020. Therefore, lime application can not only reduce the Cd content in rice grains, but alleviate the risk of Cd pollution caused by straw returning in the clean and acidic paddy field, thereby contributing to food safety.

Key words: lime, straw returning, double rice, soil acidification, cadmium