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通过野外调查与室内分析相结合的方法研究了杭州市郊主要菜园土壤中铜的状况 ,并对其与土壤有机碳的关系作了探讨。取样分析结果表明 ,调查区域菜园土壤全铜含量在 4 3×1 0 - 6 ～ 2 0 5 5× 1 0 - 6 之间 ,平均为 ( 43 6± 3 6 7)× 1 0 - 6 ,有效铜含量在 0 1 7× 1 0 - 6 ～ 6 1 8× 1 0 - 6之间 ,平均为 ( 2 70± 1 4 6)× 1 0 - 6 。同时还发现 ,菜园土壤有效铜含量与全铜含量呈极显著正相关 ,相关系数为 0 71 7 (n =4 5,P =0 0 1 ,下同 ) ,据此认为菜园土壤有效铜的供给是以全铜量为基础的。相关分析还得出 ,全铜含量与总有机碳和易氧化碳含量均呈极显著正相关 ,相关系数分别为 0 695 和 0 594 ;有效铜含量也与总有机碳和易化有机碳含量呈极显著正相关 ,相关系数分别为 0 666 和 0 557 ,这表明施用有机肥料可能是菜园土壤铜营养的重要来源之一。另外 ,菜园土壤铜的有效性也有随土壤总有机碳和易氧化有机碳含量的提高而增大的趋势 ,这对一般情况下提高土壤的供铜强度是有益的。但是 ,倘若土壤中已积累了过量的铜 ,则有可能加剧铜的毒害 ,蔬菜生产和菜园土壤管理中都应予以足够的重视。
The status of copper in the main vegetable garden soils in suburbs of Hangzhou was studied through a combination of field investigation and laboratory analysis. The relationship between copper and soil organic carbon was also discussed. The results of sampling analysis showed that the total copper content in the soils in the surveyed area ranged from 43 × 10 6 to 20 05 × 10 6, with an average of (43 6 ± 3 6 7) × 10 6, which was effective The copper content was between 0 1 7 × 10 6 ~ 6 1 8 × 10 6, with an average of (2 70 ± 1 4 6) × 10 6. At the same time, it was also found that there was a significant positive correlation between available copper content and total copper content in vegetable garden soils with a correlation coefficient of 0 71 7 (n = 45, P = 0 0 1, the same below) Based on the amount of copper. Correlation analysis also showed that there was a significant positive correlation between copper content and total organic carbon and carbon dioxide content, with correlation coefficients of 0 695 and 0 594, respectively. Available copper content also correlated with total organic carbon and organic carbon The correlation coefficient was 0 666 and 0 557, respectively. This indicated that the application of organic fertilizers may be one of the important sources of copper nutrition in garden soil. In addition, the effectiveness of copper in garden soil tends to increase with the increase of soil total organic carbon and organic carbon content, which is beneficial to improve the copper supply strength of soil in general. However, excessive accumulation of copper in the soil may exacerbate copper toxicity, and adequate attention should be given to vegetable production and soil management in the vegetable garden.