| 龙海市菠萝种植区生态地球化学特征研究 |
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| 引用本文： | 叶信栋,孙彬彬,周国华,贺灵,刘银飞,侯树军.龙海市菠萝种植区生态地球化学特征研究[J].福建农业学报,2017(9):1012-1020. |
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| 作者姓名： | 叶信栋 孙彬彬 周国华 贺灵 刘银飞 侯树军 |
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| 基金项目： | 国土资源部公益性行业科研专项 |
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| 摘 要： | 以龙海市程溪镇菠萝种植区为研究区,采集菠萝果实、同点配套岩石、土壤样品,探讨种植区岩石、土壤地球化学特征,及其与菠萝之间的关系。结果表明:种植区岩石中Hg、N、Se、U含量高于华南褶皱系及中国花岗岩中相应元素含量;土壤中N、P、K含量高于全国表层土壤平均值,且铵态N、有效P、速效K含量极其丰富,主要来源于岩石风化累积以及肥料的施用;Ca、Mg、Fe受到强烈淋滤作用而相对贫乏,但其中Fe有效态含量较高。此外,重金属元素主要受地质背景影响,无明显污染。对比表明,程溪菠萝比湛江菠萝富P贫Ca、Fe,且有毒重金属Cd、Pb含量低。土壤-菠萝相关性及元素迁移系数研究表明:菠萝对土壤中S、P、Cu、B、K等植物营养元素的吸收能力大,对Pb、F、As、Cr等有毒有害元素吸收富集能力小。综合而言,种植区内土壤N、P、K含量高,肥力条件好,菠萝吸收能力强,有毒有害元素含量低,土壤环境质量优良,菠萝吸收少,适宜农作物的种植。
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Ecological Geochemistry of Pineapple Growing Lands in Longhai City |
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| Abstract: | Pineapple growing areas in Chengxi Town,Longhai was selected for an ecological geochemical study.Samples of pineapple flesh,rock,and soil at a same site for various locations were collected to determine the correlations between the land geochemical characteristics and the fruits grown on the same site.It is found that (a) the contents of Hg,N,Se,and U in the rocks were higher than those in the granite found in South China fold system or other places in China;(b) the N,P,K contents in the soil were higher than the national average for surface soil,and the soil was particularly rich in ammonium N,available P and rapid released K,possibly due to the natural weathering and artificial fertilization in the area;(c) the contents of Ca,Mg,and Fe were relatively low by eluviation,but the available Fe was high;(d) the heavy metals came basically from the geological background with little input from pollution;and,(e) in comparison,the local pineapples were richer in P,but poorer in Ca,Fe,Cd and Pb than those grown in Zhanjiang city.The correlations between the land geochemistry and the chemical contents of the pineapple flesh,as well as the element transfer from the rocks and/or soils to the fruits,indicated that the pineapples efficiently absorbed S,P,Cu,B,K and other nutrients,but did not accumulate the pollutants such as Pb,F,As,and Cr,from the ground.Consequently,with the fertile soil,desirable nutrient transfer and minimal concern with heavy metals,Chengxi seemed to be ideal for pineapple plantation. |
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