耕层重构对小麦籽粒镉累积的影响和应用风险

王天齐; 李艳玲; 杨阳; 牛硕; 王美娥; 陈卫平

doi:10.13205/j.hjgc.202304016

耕层重构对小麦籽粒镉累积的影响和应用风险

doi: 10.13205/j.hjgc.202304016

王天齐^1,2,
李艳玲^1,2,
杨阳^1, ,,
牛硕^1,3,
王美娥¹,
陈卫平^1,2

1. 中国科学院生态环境研究中心城市与区域生态国家重点实验室, 北京 100085;
2. 中国科学院大学, 北京 100049;
3. 郑州大学河南先进技术研究院, 郑州 450003

基金项目:

国家自然科学基金项目(41907353,41977146)

详细信息

作者简介:
王天齐(1992-),男,博士研究生,主要研究方向为生态风险评估。tqwang_st@rcees.ac.cn

通讯作者:
杨阳(1990-),男,副研究员,主要研究方向为生态风险评估。yyang@rcees.ac.cn

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- 文章访问数: 63
- HTML全文浏览量: 10
- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2022-04-28
- 网络出版日期: 2023-05-26
- 刊出日期: 2023-04-01

EFFECT AND APPLICATION RISK OF PLOUGH-LAYER RECONSTRUCTION ON ACCUMULATION OF CADMIUM BY WHEAT GRAIN

WANG Tianqi^1,2,
LI Yanling^1,2,
YANG Yang^{1
, ,},
NIU Shuo^1,3,
WANG Meie¹,
CHEN Weiping^1,2

1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Henan Institutes of Advanced Technology, Zhengzhou University, Zhengzhou 450003, China

摘要

摘要: 小麦富镉(Cd)问题受到广泛关注,耕层重构技术具备降Cd潜力。通过大田实验,探究耕层重构和深翻耕技术对土壤-小麦系统Cd污染的控制效果及其风险。结果表明:土壤耕作层(0~20 cm)中的Cd总量是影响小麦籽粒Cd含量的关键因子。耕层重构技术通过互换深层土壤(30~60 cm)和表层土壤(0~30 cm),能够显著降低耕作层(0~20 cm)土壤Cd总量和Cd有效态含量,并使小麦籽粒Cd含量降低17.3%~24.6%。深翻耕技术通过混匀0~30 cm土壤,能够降低耕作层土壤Cd总量,但会导致土壤Cd有效态含量升高,进而促进小麦籽粒Cd富集。耕层重构和深翻耕对小麦营养元素吸收影响均较小。耕层重构技术的处理深度较大而深翻耕处理深度不足,因此耕层重构技术的土壤降Cd能力、小麦降Cd能力和不确定性均优于深翻耕处理,适用于中轻度Cd污染[ρ(Cd)>1.2 mg/kg]农田修复。耕层重构技术与补施Ca、Mg肥等农艺措施的组合应用可有效提高降Cd效率。
- 耕层重构 /
- 深翻耕 /
- 镉(Cd) /
- 小麦 /
- 土壤剖面
Abstract: The enrichment of cadmium (Cd) in wheat has attracted extensive attention, while plough-layer reconstruction (PR) has the potential for reducing Cd in wheat grain. The present study investigated the ability of PR and deep-ploughing (DP) to control Cd pollution in the soil-wheat system and potential risk through field experiments. Results showed that Cd in plough-layer (0 to 20 cm) soil was the key factor affecting Cd in wheat grain. PR reduced total Cd concentration in plough layer (0 to 20 cm) soil significantly by switching 0 to 30 cm soil layer with 30 to 60 cm soil layer, in which total Cd and available Cd concentration in soil decreased significantly, and Cd concentration in wheat grain dropped by 17.3% to 24.6%. Through mixing soil in depth of 0 to 30 cm, DP decrease total Cd but led to increased available Cd concentration in soil and Cd in grain. Both PR and DP posed little negative impact on the nutrient elements of wheat grain. The treatment depth of DP was insufficient compared with PR, leading to PR’s better soil and wheat Cd-reducing capacity and lower uncertainty over DP. PR was suitable for mild to moderate Cd-polluted farmland remediation. PR could be combined with agronomic measures, such as Ca- and Mg-fertilizers, for higher Cd-reducing efficiency.
- plough-layer reconstruction /
- deep ploughing /
- cadmium /
- wheat /
- soil profile

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