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核农学报  2015 

竹林坡位对土壤及竹笋中微量元素的影响

DOI: 10.11869/j.issn.100-8551.2015.04.0769, PP. 769-776

Keywords: 竹林,土壤锌,坡位,竹笋,微量元素

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Abstract:

为探讨竹林不同坡位对土壤理化性质、土壤全锌、土壤有效锌、笋中锌、铁、锰、钾及铜元素的影响,本研究以浙江省遂昌县毛竹现代示范生产基地的毛竹林为对象,试验共设置5个坡位,分别为坡顶(S0)、上坡位(S1)、中坡位(S2)、下坡位(S3)和坡底(S4).结果表明:土壤碱解氮、有效磷、速效钾和有机质含量有随坡位上升呈下降的趋势,S4坡位的土壤碱解氮、有效磷、速效钾和有机质均与S1坡位达到显著差异.而土壤全锌、土壤有效锌、笋中锌及铁有随坡位的降低而降低的趋势,均以S0为最高.但各坡位处理中的土壤全锌含量均未达到显著差异,S0坡位的有效锌与其他各坡位均达到极显著差异.笋中的锌S0坡位为最高,比其他各坡位增加了5.20%、7.25%、85.61%和140.52%,S0与S3和S4达到了极显著差异.笋中铁含量也是以S0为最高,为157.16mg·kg-1,与其他各处理间均达到了显著差异(S3除外).笋中锰钾元素则以S1为最高,分别为206.78mg·kg-1和37.14g·kg-1,S1位笋中锰只与S4达到了显著差异,S1位笋中的钾与S3达到了显著差异.笋中铜以S4坡位为最高,其他各坡位均与S2达到了显著差异(S0除外).在其他外界环境相同条件下,随着坡位的升高笋中锌、铁、锰、钾土壤中全锌和有效锌而增加的趋势,而土壤碱解氮、有效磷、速效钾、有机质和笋中铜的变化趋势则相反.试验结果为竹笋中锌、铁及其他元素的环境风险控制提供科学依据.

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