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    高大林, 叶文玲, 马友华, 等. 施硅对水稻幼苗吸收锌、铜的影响[J]. 华南农业大学学报, 2021, 42(3): 26-32. DOI: 10.7671/j.issn.1001-411X.202007001
    引用本文: 高大林, 叶文玲, 马友华, 等. 施硅对水稻幼苗吸收锌、铜的影响[J]. 华南农业大学学报, 2021, 42(3): 26-32. DOI: 10.7671/j.issn.1001-411X.202007001
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    GAO Dalin, YE Wenling, MA Youhua, et al. Impact of silicon application on zinc and copper absorption of rice seedlings[J]. Journal of South China Agricultural University, 2021, 42(3): 26-32. DOI: 10.7671/j.issn.1001-411X.202007001
    Citation: GAO Dalin, YE Wenling, MA Youhua, et al. Impact of silicon application on zinc and copper absorption of rice seedlings[J]. Journal of South China Agricultural University, 2021, 42(3): 26-32. DOI: 10.7671/j.issn.1001-411X.202007001
    shu

    施硅对水稻幼苗吸收锌、铜的影响

    Impact of silicon application on zinc and copper absorption of rice seedlings

      摘要
    • 摘要:
      目的  研究不同硅(Si)肥水平下水稻幼苗的生长状况及锌(Zn)、铜(Cu)的吸收和转运情况。
      方法  试验以水稻‘皖稻71号’为材料，通过水培方式，设置硅肥(以SiO2计)水平分别为0(对照，CK)、30、60、90、120和150 mg·L−1共6个处理，研究不同Si肥水平处理下水稻幼苗的生物量、Zn和Cu含量及积累状况。
      结果  施用Si肥后，水稻幼苗叶片数、株高和根长均高于对照，水稻地上部和根部生物量(鲜质量)分别增加5.44%~52.81%和4.83%~42.49%，叶片数、株高、根长和地上部生物量均在90 mg·L−1 SiO2处理达到最高值。施Si处理的水稻幼苗根部Zn净吸收量提高了5.79%~77.43%，Cu净吸收量提高了6.51%~44.96%。60和90 mg·L−1 SiO2处理的Zn转运系数较对照分别提高10.91%和38.18%，Cu转运系数较对照分别提高8.70%和26.09%。水稻地上部Zn、Cu含量随着Si肥水平的提高而增加，90 mg·L−1 SiO2处理达到峰值，之后随Si肥水平的增加开始出现下降的趋势。
      结论  综合考虑水稻生长指标、生物量和对Zn、Cu的吸收等因素，本研究中90 mg·L−1 SiO2处理是微量营养元素Zn、Cu吸收的最佳施用Si肥水平。

       

      Abstract:
      Objective  To study the growth of rice seedlings as well as absorption and transport of zinc (Zn) and copper (Cu) under different silicon (Si) application levels.
      Method  ‘Wandao 71’ was used as material through water cultivation to study the biomass, zinc and copper contents and accumulation of rice seedlings under different silicon fertilizer levels of 0 (CK), 30, 60, 90, 120, 150 mg·L−1, respectively.
      Result  The leaf number, plant height and root length of rice seedlings were all higher than those of the control, and the biomass (fresh weight) of rice shoots and roots increased over the control by 5.44%−52.81% and 4.83%−42.49% respectively. The leaf number, plant height, root length and above-ground biomass were the highest in 90 mg·L−1 SiO2 treatment. Zn and Cu net absorptions of rice root increased over the control by 5.79%−77.43% and 6.51%−44.96%, respectively. The Zn transport coefficients of 60 and 90 mg·L−1 SiO2 treatments increased over the control by 10.91% and 38.18% respectively, meanwhile those of Cu increased by 8.70% and 26.09% respectively. The contents of Zn and Cu in rice shoot increased with the increase of SiO2 concentration, reached the peak value at 90 mg·L−1 SiO2 concentration, and then began to decline with the increase of SiO2 concentration.
      Conclusion  Considering the factors of rice growth index, biomass, and absorption of Zn and Cu, 90 mg·L−1 SiO2 treatment is the best Si fertilizer level for microelements of Zn and Cu absorption in the present study.

       

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