江西省旱地土壤有效硅含量的分布特征及其影响因素
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(1.江西农业大学国土资源与环境学院 /江西省鄱阳湖流域农业资源与生态重点实验室,江西 南昌 330045;2.福建农林大学资源与环境学院 /福建农林大学国际镁营养研究所,福建 福州 350002)

作者简介:

卢志红(1970-),女,江西鄱阳人,副教授,博士,主要从事土壤与植物营养研究。E-mail: luzhihong1@163.com。

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基金项目:国家自然科学基金项目(31860589);国家科技部重点研发计划项目(2016YFD0300903-03、2017YFD0301601-01)。


The distribution characteristics and influence factors of available silicon content in upland soil in Jiangxi province
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(1.College of Land Resources and Environment/Jiangxi Province Key Laboratory of Poyang Lake Basin Agricultural Resource andEcology,Jiangxi AgriculturalUniversity,Nanchang Jiangxi330045;2.Collegeof Resources and Environment,Fujian Agriculture and Forestry University/International MagnesiumInstitute,Fujian Agriculture and ForestryUniversity,Fuzhou Fujian350002)

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    摘要:

    了解江西旱地土壤有效硅含量分布规律及影响因素,可为今后江西省旱地土壤采取合理的硅肥施用措施提供理论依据。本研究采用柠檬酸浸提—硅钼蓝比色法测定了江西省旱地耕层 185个土样的有效硅含量,结果表明:(1)江西旱地土壤有效硅含量范围在 12.7~ 192.0 mg·kg -1,空间分布存在较大差异,整体表现为北高南低,西高东低,赣东北最低的分布特征。(2)赣东北、赣北、赣西土壤中有效硅含量随着土壤 pH值升高而显著(P<0.05)增加;赣南旱地土壤有效硅含量随碱解氮、有效磷的升高而显著( P<0.05)降低。(3)江西省除赣东北土壤有效硅平均含量稻田高于旱地,其他 4个区旱地土壤有效硅平均含量均高于稻田。且旱地土壤有效硅含量主要集中在 25~ 115 mg·kg -1,而稻田土壤有效硅含量主要集中在 25~ 70 mg·kg -1,旱地有效硅含量缺(25~ 70 mg·kg-1)与极缺(<25 mg·kg -1)的土壤占比分别比稻田低 7.09%和 6.03%。但江西省旱地土壤有效硅含量缺和极缺的也占57.3%,超过一半,急需通过合理施肥提高其含量,保证作物的产量和品质。

    Abstract:

    Understanding the distribution law and influencing factors of available silicon content in Jiangxi upland soil can provide theoretical basis for adopting reasonable silicon fertilizer application measures in Jiangxi upland soilin the future. In thisstudy,citric acid extraction -silicon molybdenum blue colorimetric method was used to determine the available silicon content of 185 soil samples in the upland plough layer of Jiangxi province. The results showedthat:(1)The available silicon content in the upland soil of Jiangxi province ranges from 12.7 mg·kg -1 to 192.0 mg·kg -1,and there are significant differences in its spatial distribution. The overall distribution characteristics ofsoil available silicon content are higher in the north region and westregion,lower in the south region and the eastregion,while the lowest area locates in the northeast of Jiangxiprovince.(2)The available silicon contents in thesoils of northeastJiangxi,north Jiangxi and west Jiangxi increasesignificantly( P <0.05)with the increase of soilpH value. The content of available silicon in upland soil in southern Jiangxi decreases significantly( P <0.05)withthe increase of available nitrogen and availablephosphorus.(3)The average content of available silicon in upland soilexcept northeast Jiangxi is higher than that in paddy field in Jiangxi province.Moreover,the available silicon content in upland soil is mainly concentrated in the range of 25~ 115 mg·kg -1,while the available silicon content in paddy soil is mainly concentrated in the range of 25~ 70 mg·kg -1. The proportion of soil withdeficient(25~ 70 mg·kg -1)and extremely deficient(< 25 mg·kg -1)available silicon content in upland is 7.09% and 6.03% lower than that in paddyfield,respectively .However,the proportion of soil with deficient and extremely deficient available silicon content in upland field in Jiangxi province is 57.3% and more than half. It needs to be improved through reasonable fertilization to ensure crop yield and quality.

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卢志红,周慧梅,颜晓,吴建富,李琳.江西省旱地土壤有效硅含量的分布特征及其影响因素[J].中国土壤与肥料,2020,(4):101-106.

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  • 收稿日期:2019-07-19
  • 最后修改日期:
  • 录用日期:2019-10-13
  • 在线发布日期: 2020-09-14