福建丰产龙眼园土壤微量元素含量的研究

THE CONTENTS OF TRACE ELEMENTS IN THE SOIL OF PRODUCTIVE LONGAN ORCHARDS IN FUJIAN

本文认为,福建丰产龙眼园土壤有效态锌、钼及水溶态硼含量较高,而活性锰及有效态铜含量较低。土壤有机质含量与有效态锌、铜和易还原态锰含量呈极显著正相关;在土壤pH4.85～7.20范围内,pH值与易还原态锰,水溶态硼,有效态锌、钼含量呈极显著或较显著正相关,与代换态锰含量呈极显著负相关,据此,笔者提出了红壤龙眼园土壤微量元素含量的适宜指标,为土壤营养诊断提供参考。

The present study was carried out in the six major production areas of Longan in Fujian, China,in order to find out the trace element status of the soil in productive Longan orchard.The analysis results indicated that the contents of available Zn,Me and water—soluble B in the soil of productive Longan orchards were higher than those in the red earth of China,while the contents of active Mn,available Cu and total Zn,Mn,Cu in the soil of the orchards were lower.Positive correlations between organic matter contents in the soil and available Mn,Cu,Zn contents are significant in this statistical analyse.When soil pH was 4.85—7.20,very significant or rela- tively significant positive correlations were found between the contents of easily reducible Mn, water—soluble B,available Zn,Mo and pH values;there was very significant negative correla- tion,however,between the contents of exchanseable Mn and pH values in soil.The preliminary study suggests the optimum range of contents of trace elements in the soil of Longan orchards in Fujian,that may provide parameters of nutrition diagnosis and balanced fertilization for the pro- duction of Longan orchard.