桂林毛村土壤钙、锌、铅有效性与pH关系初探

The correlation between available elements Ca,Zn,Pb and soil pH value in Maocun,Guilin

以桂林毛村为例,采集土壤样品93个,测定了土壤大量元素钙、必需微量元素锌和有害微量元素铅全量、有效态含量和土壤pH,探讨pH值对这些元素有效态的影响,为该地区改变pH、提高有益元素有效态含量,抑制有害元素有效态含量提供依据。研究结果表明:该地区土壤全锌和全铅含量都很高,但有效锌含量不高;土壤pH与土壤钙、锌的全量和有效态都呈极显著正相关,有效锌与有效铅呈极显著正相关关系。考虑空间因素,MAPGIS 6.5空间耦合分析发现pH与有效锌在不同区间存在不同关系。SPSS 13.0分区间讨论,当pH<7.48,pH与有效锌呈极显著正相关,相关系数0.328;当pH>7.48,pH与有效锌呈显著负相关,相关系数-0.553。

Ninety three soil samples were collected from Maocun in Guilin for determinating soil pH, total and available contents of substantial elements-Ca, essential trace elements-Zn and harmful trace elements-Pb. Aiming to increase essential elements＇ available contents and decrease harmful elements＇ available content, the research mainly focused on the correlation between soil pH and available elements. Based on Microsoft Excel and SPSS 13.0, it is found that contents of total Zn and total Pb are very high, but available contents of them are not so high. There was very significant positive correlation between soil pH and total Ca, total Zn, available Ca, available Zn, and significant correlation between available Zn and available Ph. Considering space factor, there was different correlation between soil pH and available Zn in different pH interval by Mapgis 6.5, and soil pH value 7.48 was the turning point. The correlation by SPSS 13.0 were analyzed and found that while pH〈7.48, the correlation between pH and available Zn was positive significant with the correlation coefficient of 0. 328; pH〉7.48, the correlation between them was negatively significant with the correlation coefficient was -0. 553.