海南植胶区部分胶园土壤有效钼含量及其影响因素分析

Analysis on content of soil-available molybdenum and its influencing factors in some plantations in Hainan rubber planting areas

【目的】探讨海南部分橡胶园土壤有效钼分布情况及其影响因素,为海南橡胶产业的发展提供参考依据。【方法】通过野外采样和调查以及实验室内分析测试对海南部分胶园土壤有效钼含量进行研究。【结果】海南部分胶园土壤有效钼含量范围为0.01～0.76mg/kg,平均值为0.033mg/kg;胶园土壤有效钼含量评价为"很低"的占64.55%,中等胶园只占3.79%,"很高"的胶园比例只占0.2%;土壤pH值与有效钼含量之间的相关系数为0.062,相伴概率是0.166;土壤有机质与有效钼含量之间的相关系数为0.043,相伴概率是0.331。【结论】胶园土壤有效钼缺乏十分严重;胶园土壤有机质和pH值对有效钼含量没有明显的影响;不同成土母质的胶园土壤有效钼平均含量有所差别,玄武岩母质含量最高,砂页岩母质含量最低。

[Objective]The distribution of soil-available molybdenum （Mo） and its influences in some rubber planta- tions in Hainan were researched in order to provide references for the rubber industry development. [Method]The content of soil-available molybdenum in some rubber plantations in Hainan were studied by relevant soil sampling, investigations, and laboratory tests. [Result]The contents of soil-available molybdenum ranged from 0.01 to 0.76 mg/kg, and the average was 0.033 mg/kg. The low-level-Mo rubber plantations accounted for 64.55% of the total investigated plantations, rubber plantation with medium-level accounted for only 3.79%, and high-level-Mo rubber plantations only account for 0.2%. The correlation coefficient between soil pH and available Mo was 0.062 with the associated probability of 0.166;the correlation coefficient between soil organic matter and available Mo was 0.043 with the associated probability of 0.331. [Conclusion] The soil-available Mo in rubber plantations lacked severely; the soil organic matter and pH values did not have significant effects on the available molybdenum contents in the rubber plantations. The available molybdenum contents in rubber plantations soil formed with different parent materials differed; the Mo content was the highest in soils formed with balsalt parent material, while the Mo content was the lowest in soils formed with sand shale parent material.