福建平和蜜柚园土壤镁含量状况研究
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(1.福建农林大学资源与环境学院,福建 福州 350002;2.福建农林大学国际镁营养研究所,福建 福州 350002)

作者简介:

张亚东(1995-),男,河南信阳人,硕士研究生,主要从事土壤改良及修复研究。E-mail:zyd950@163.com。

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Effect of long-term fertilization on soil magnesium content of pomelo orchard in Pinghe county
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Affiliation:

(1.College of Resources and Environment,Fujian Agricultural and Forestry University,Fuzhou Fujian 350002;2.International Magnesium Institute,Fujian Agricultural and Forestry University,Fuzhou Fujian 350002)

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    摘要:

    为明确长期施肥下福建省平和县蜜柚园土壤镁素特征及其影响因素,采集了87份平和县具有代表性的蜜柚园0~20、20~40、40~60 cm土层土样,对其进行镁含量测定,并与其他相关土壤性质进行相关性分析。结果表明,平和县土壤酸化程度较高,土壤pH值平均为4.5,且存在土壤亚表层酸化现象。79%的调研蜜柚园土壤存在表层(0~20 cm)交换性镁缺乏问题,随着土层的加深,镁含量显著降低,从表层到底层土壤交换性镁含量平均值分别为82.1、48.9、51.3 mg/kg。相关分析结果表明,土壤交换性镁含量与种植年限呈负相关,而与土壤pH、有机质含量呈正相关,且与土壤K/Mg呈反比。平和县土壤交换性镁含量缺乏与长期不合理的施肥方式有关。为实现蜜柚产业的可持续发展,应在减少化肥投入的基础上增施有机肥,提高有机质,改良土壤酸性,同时重视镁元素的补充。

    Abstract:

    In order to understand the soil magnesium content of Pinghe county fujian Province pomelo orchard and its influencing factors,87 samples of 0~20,20~40 and 40~60 cm soil in typical pomelo orchards in Pinghe county were collected for the determination of magnesium content and the correlation analysis with other related soil properties was carried out. Results showed that,the degree of soil acidification in Pinghe county was higher,with an average pH value of 4.5 and there is soil acidification in the subsurface layer. 79% pomelo orchard was found to be deficient in exchangeable magnesium in the surface layer (0~20 cm). With the deepening of the soil layer,the magnesium content decreased significantly. The average exchangeable magnesium content in different soil layers was 82.1,48.9 and 51.3 mg/kg,respectively. By correlation analyzing the influencing factors of soil exchangeable magnesium,it was found that the content of soil exchangeable magnesium decreased with the extension of planting years,and increased with the increase of soil pH and organic matter content,which was inversely proportional to soil K/Mg. The lack of exchangeable magnesium in Pinghe county is related to the long-term unreasonable fertilization method. In order to realize the sustainable development of pomelo industry,it is necessary to increase orgainc fertilizer on the basis of reducing the input of chemical fertilizer,increase organic matter,improve soil acidity,and pay attention to the supplement of magnesium element.

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张亚东,姜亚男,李梦婷,吴良泉,杨文浩.福建平和蜜柚园土壤镁含量状况研究[J].中国土壤与肥料,2021,(4):142-147.

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  • 收稿日期:2020-05-09
  • 最后修改日期:
  • 录用日期:2020-06-06
  • 在线发布日期: 2021-09-15
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