不同阴离子形态锌肥对水稻营养及土壤锌形态的影响

Effects of various anionic zinc fertilizers on the rice nutrition and zinc forms in soil

  • 摘要: 盆栽试验研究3种阴离子形态Zn肥对水稻生长发育、养分吸收及土壤Zn形态 的影响。结果表明,NO-3或NO-3与SO2-4配合较SO2-4、Cl-有 利于提高 水稻产量。供试土壤各形态Zn含量以交换态(Ex-Zn)和有机结合态(OM- Zn)最低,其次为碳酸盐结合态(CAB-Zn),再次为晶体氧化铁结合态(COFe-Zn)、无 定型氧化铁结合态(AOFe-Zn)及氧化锰结合态(OMn-Zn),其中Ex-Zn、OM-Zn及OMn-Zn 3形态Zn之和(即土壤有效锌)为9.2mg/kg,占 全Zn量的9.6%;土壤矿物态锌是土壤Zn素的主要组分,含量为69.3mg/kg,占全Zn量的72.0%。植稻提高了土壤CAB-Zn、AOFe-Z n、OMn-Zn含量,土壤各形态Zn仍以Ex-Zn、OM-Zn最低,其次为COFe-Zn,再次为CAB-Zn、AOFe-Zn及OMn-Zn含量,Ex-Zn、OM-Zn及OMn-Zn 3形态Zn之和为10.5mg/kg,占全Zn量的11.2%。土壤矿物态锌仍是土壤Zn素的主要组分,但含量及占全Zn量的比例较种植前分别减少4.2mg/kg和2.7%。水稻施Zn提高了植株吸Zn量和土壤全Zn量及OMn-Zn、COFe-Z n含量,土壤有效锌(Ex-Zn、OM-Zn及OMn-Zn 3形态之和)含量较对照增加12.7%~103.8%。

     

    Abstract: Pot experiment was carried out to study the effects of 3 kinds of anionic zinc fertilizers on the growth,nutrient uptake of rice and zinc forms in soil.The results indicate that the yield is more benefitly increased by Zn(NO3)2 ,or by a combined application of Zn(NO3)2 and ZnSO4 than ZnSO4,ZnCl2.The Zn content of various forms in provided soil is in the order of Ex-Zn and OM-Zn<CAB-Zn<COFe-Zn<AOFe-Zn<OMn-Zn <mineral Zn.Total Zn content in 3 forms of Ex-Zn and OM-Zn and OMn-Zn(i.e.available Zn)is 9.2mg/kg and 9.6% of the total soil Zn.The mineral Zn is the native form in paddy soil,and its content is 69.3mg/kg and 72.0%of the total soil Zn.The contents of CAB-Zn,AOFe-Zn and OMn-Zn are increased by rice planting,the Zn contents of various forms in soil are in the order of Ex-Zn and OM-Zn<COFe-Zn<CAB-Zn<AOFe-Zn<OMn-Zn<mineral Zn.Total Zn content in 3 forms of Ex-Zn and OM-Zn and OMn-Zn is 10.5mg/kg and occupies 11.2% of the total soil Zn.The mineral Zn is still the native form in paddy soil,but the content is decreased by 4.2 mg/kg and 2.7% of the total soil Zn.The amount of total Zn uptake,the total soil Zn,the content of OMn-Zn and COFe-Zn are enhanced by application of zinc fertilizer and the content of available soil Zn(i.e. Ex-Zn,OM-Zn and OMn-Zn)is increased by 12.7%~103.8%.

     

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