江汉平原不同母质发育水稻土磷含量及其空间分布异质性——以湖北省荆州区为例
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S158.5

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农业农村部作物需水与调控重点实验室项目“长江流域水稻干旱复水补偿效应及其叶片光合水分协同调控机制”(ZWS202302)


Phosphorus content and its spatial heterogeneity in paddy soil with different parent materials at Jianghan Plain—Taking Jingzhou District in Hubei Province as an example
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    摘要:

    [目的] 明确江汉平原不同母质发育水稻土磷含量及其空间分布特征,为水稻种植区域磷肥合理施用提供科学参考。[方法] 以江汉平原腹地荆州区为例,测定不同母质发育水稻土磷含量并对其等级进行评价。对荆州区水稻土3种成土母质(冲积物母质、次生黄土母质和湖积物母质)分布地区的基本农田进行调查,共选择600个土壤样点进行采样,测定土壤样品中的总磷(TP)、有机磷(OP)、有效磷(AP)和水溶性磷(WSP)含量。[结果] 荆州区冲积物母质地区、次生黄土母质地区和湖积物母质地区的水稻土总磷含量平均分别为0.881,0.427,0.579 g/kg;有机磷含量分别为0.104,0.058,0.066 g/kg;有效磷含量为24.418,11.339,17.043 mg/kg;水溶性磷含量为21.157,13.421,22.600 mg/kg。水稻土各形态磷含量在荆州区南部(长江沿岸)冲积物母质和湖积物母质发育地区较高,而中部和北部次生黄土母质发育(丘陵岗地)地区较低。根据第二次土壤普查磷分级标准,荆州区水稻土总磷处于中等及以上水平,有效磷以中等水平为主,且冲积物和湖积物发育水稻土磷量高于次生黄土母质地区。冗余分析和空间插值表明,荆州区不同母质发育水稻土的地带分布与长江、湖泊和丘陵位置密切相关,并显著影响土壤磷的空间异质性。[结论] 荆州区可考虑在长江两岸和湖泊周边的冲积物和湖积物母质分布区适度控制磷肥用量,在丘陵地区的次生黄土母质分布区适当增施磷肥用量以提高土壤肥力和维持作物生产力。

    Abstract:

    [Objective] The phosphorus content (P) and spatial distribution of paddy soils developed from different parent materials in the Jianghan Plain were analyzed to provide a reference for the strategic application of phosphorus fertilizer in rice-planting areas. [Methods] Jingzhou area in the hinterland of Jianghan Plain was taken as an example to determine the phosphorus content of paddy soil developed from different parent materials and evaluate its grade. A survey was conducted on the farmland in Jingzhou area, focusing on paddy soils developed from three parent materials, namely, alluvial deposits, secondary loess, and lacustrine deposits. A total of 600 soil samples were collected, and total phosphorus (TP), organic phosphorus (OP), available phosphorus (AP), and water-soluble phosphorus (WSP) contents were measured and evaluated. [Results] The average TP contents in paddy soils developed from alluvial, secondary loess, and lacustrine deposits in Jingzhou area were 0.881, 0.427, and 0.579 g/kg, respectively. The OP content was 0.104, 0.058, and 0.066 g/kg, respectively. The AP content was 24.418, 11.339, and 17.043 mg/kg, respectively, and the WSP content was 21.157, 13.421, and 22.600 mg/kg. The phosphorus content in various forms was higher in the southern part of Jingzhou area along the Yangtze River, where paddy soils developed from alluvial and lacustrine deposits. Meanwhile, phosphorus was lower in the central and northern regions, where paddy soils developed from secondary loess on the hilly uplands. According to the phosphorus grading standards from the second national soil survey, the TP content in the paddy soils of Jingzhou area was at a medium or higher level, whereas AP was mainly at a medium level. The phosphorus content in paddy soils developed from alluvial and lacustrine deposits was higher than that in soils developed from secondary loess. Redundancy analysis and spatial interpolation showed that the zonal distribution of paddy soils developed from different parent materials in Jingzhou area was closely related to the locations of the Yangtze River, lakes, and hills, significantly influencing the spatial heterogeneity of soil phosphorus. [Conclusion] In Jingzhou area, it is advisable to moderately control phosphorus fertilizer application in areas with alluvial and lacustrine deposits along the Yangtze River and around lakes while appropriately increasing phosphorus fertilizer application in hilly areas with secondary loess to enhance soil fertility and maintain crop productivity.

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李雅琼,严如玉,司转运,李鹏慧,高阳,邹家龙,李继福.江汉平原不同母质发育水稻土磷含量及其空间分布异质性——以湖北省荆州区为例[J].水土保持通报,2025,45(3):79-85,97

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  • 收稿日期:2024-12-24
  • 最后修改日期:2025-01-19
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  • 在线发布日期: 2025-06-28
  • 出版日期: 2025-06-15