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

作　　者：高大林 叶文玲[1] 马友华[1] 鲁洪娟[1,2] GAO Dalin;YE Wenling;MA Youhua;LU Hongjuan(Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/School of Resources and Environment,Anhui Agricultural University,Hefei 230036,China;Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety/Agro-Environment Production Institution,Ministry of Agriculture and Rural Affairs,Tianjin 300191,China)

机构地区：[1]农田生态保育与污染防控安徽省重点实验室/安徽农业大学资源与环境学院,安徽合肥230036 [2]天津市农业环境与农产品安全重点实验室/农业农村部环境保护科研监测所,天津300191

出　　处：《华南农业大学学报》2021年第3期26-32,共7页Journal of South China Agricultural University

基　　金：农田生态保育与污染防控安徽省重点实验室开放基金资助项目(FECPP201905);天津市农业环境与农产品安全重点实验室开放基金(2019-01)。

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SiO_(2)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) SiO_(2)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)SiO_(2)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) SiO_(2)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)SiO_(2)处理是微量营养元素Zn、Cu吸收的最佳施用Si肥水平。【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) SiO_(2) treatment. Zn and Cu net absorptions of rice root increased over the control by 5.79%-77.43% and6.51%-44.96%, respectively. The Zn transport coefficients of 60 and 90 mg·L^(-1) SiO_(2) 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 SiO_(2) concentration, reached the peak value at 90 mg·L^(-1) SiO_(2) concentration, and then began to decline with the increase of SiO_(2) concentration.【Conclusion】Considering the factors of rice growth index, biomass, and absorption of Zn and Cu, 90 mg·L^(-1) SiO_(2) treatment is the best Si fertilizer level for microelements of Zn and Cu absorption in the present study.

关 键 词：硅肥 水稻幼苗 锌 铜 吸收 

分 类 号：S143[农业科学—肥料学] S511[农业科学—农业基础科学]