浙江农业科学 ›› 2026, Vol. 67 ›› Issue (5): 1214-1220.DOI: 10.16178/j.issn.0528-9017.20240682

• 粮食作物 • 上一篇    下一篇

氮磷钾梯度施肥对水稻吸收累积汞的影响

徐再萌1(), 鲁晨妮1, 孙达2, 石艳平3, 陈贵1()   

  1. 1.嘉兴市农业科学研究院,浙江 嘉兴 314016
    2.嘉兴市南湖区农渔技术推广站,浙江 嘉兴 314051
    3.嘉兴市土肥植保与农村 能源站,浙江 嘉兴 314050
  • 收稿日期:2024-08-30 出版日期:2026-05-11 发布日期:2026-05-12
  • 通讯作者: 陈贵
  • 作者简介:陈贵,E-mail:chenzhao2004@163.com
    徐再萌,主要从事土壤磷循环和生态环境研究。E-mail:2020103011026@stu.zafu.edu.cn
  • 基金资助:
    浙农计发〔2020〕18号项目;嘉兴市科技计划项目(2021AZ10009)

Effects of nitrogen,phosphorus,and potassium gradient fertilization on mercury uptake and accumulation in rice

XU Zaimeng1(), LU Chenni1, SUN Da2, SHI Yanping3, CHEN Gui1()   

  1. 1.Jiaxing Academy of Agricultural Sciences,Jiaxing 314016,Zhejiang
    2.Agricultural and Fishery Technology Extension Station of Nanhu District,Jiaxing City,Jiaxing 314051,Zhejiang
    3.Soil,Fertilizer,Plant Protection and Rural Energy Station of Jiaxing City,Jiaxing 314050,Zhejiang
  • Received:2024-08-30 Online:2026-05-11 Published:2026-05-12
  • Contact: CHEN Gui

摘要:

为了筛选适合汞污染土壤水稻种植的施肥量,本研究在推荐用量的基础上,分别设置了氮梯度[N含量:0(N0)、100 kg·hm-2(N1)、200 kg·hm-2(N2)、300 kg·hm-2(N3)],磷梯度[P2O5含量:0(P0)、30 kg·hm-2(P1)、60 kg·hm-2(P2)、90 kg·hm-2(P3)]和钾梯度[K2O含量:0(K0)、75 kg·hm-2(K1)、150 kg·hm-2(K2)、225 kg·hm-2(K3)],通过盆栽试验,探究氮磷钾梯度施肥对水稻吸收累积汞的影响。结果表明,在氮梯度中,籽粒和秸秆的汞含量及其累积量随着氮肥施用量的增加呈现先上升后下降的趋势,并在N1处理下达到最大值;与不施磷肥相比,P1和P3处理显著(p<0.05)提高了秸秆中的汞含量,而P2与P0处理无显著差异;在钾梯度处理中,K3处理籽粒、秸秆和地上部的汞累积量最低。因此,建议在汞污染土壤水稻种植中采用氮肥施用量300 kg·hm-2、磷肥施用量60 kg·hm-2、钾肥施用量225 kg·hm-2。此外,氮、磷和钾肥的互作效应仍有待进一步探究。

关键词: 汞, 氮磷钾, 水稻

Abstract:

To screen suitable fertilization rates for rice cultivation in mercury-contaminated soil,this study established nitrogen gradients [N content:0(N0),100 kg·hm-2(N1),200 kg·hm-2(N2),300 kg·hm-2(N3)],phosphorus gradients [P2O5 content:0(P0),30 kg·hm-2(P1),60 kg·hm-2(P2),90 kg·hm-2(P3)],and potassium gradients [K?O content:0(K0),75 kg·hm-2(K1),150 kg·hm-2(K2),225 kg·hm-2(K3)] based on recommended application rates. A pot experiment was conducted to investigate the effects of nitrogen,phosphorus,and potassium gradient fertilization on mercury uptake and accumulation in rice. The results showed that under nitrogen gradients,both the mercury content and accumulation amount in grains and straw initially increased and then decreased with increasing nitrogen application rate,reaching a maximum under the N1 treatment. Compared with no phosphorus fertilizer,the P1 and P3 treatments significantly (p<0.05)increased mercury content in the straw,while no significant difference was observed between the P2 and P0 treatments. Under potassium gradients,the K3 treatment resulted in the lowest accumulation amount of mercury in grains,straws,and aboveground parts. Therefore,it is recommended to adopt a nitrogen application rate of 300 kg·hm-2,a phosphorus application rate of 60 kg·hm-2,and a potassium application rate of 225 kg·hm-2 for rice cultivation in mercury-contaminated soil. Furthermore,the interaction effects of nitrogen,phosphorus,and potassium fertilizers warrant further investigation.

Key words: mercury, nitrogen,phosphorus,and potassium, rice

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