四湖及後龍海岸林土壤有機物之組成與分佈

Composition and Distribution of Soil Organic Matter in Coastal Forests at Szehu and Houlong

陳財輝(Tsai-Huei Chen) ； 陳振興(Jenn-Shing Chen)

《台灣林業科學》 18卷2期 (2003/06) Pp. 159-162

https://doi.org/10.7075/TJFS.200306.0159

摘要

本研究於雲林縣四湖海岸低濕地及苗栗縣後龍海岸飛砂地調查海岸林土壤剖面有機物組成及分佈。四湖與後龍土壤剖面全碳含量均以表層最高，土壤表層pH值遠較下層土壤為低，表層腐質酸、黃酸等土壤有機物含量較高，造成表層土壤物pH降低。兩試驗地水溶性有機碳、黃酸與腐植酸均主要分佈在土壤表層，在深度5cm以下之含量急遽減少。試區土壤有機物在土壤表層迅速分解，加以砂質土對有機碳的吸附作用極低，使得相對的淋洗作用加強，因此海岸林下層土壤剖面並無有機物累積的現象。

關鍵字

海岸林 ； 土壤有機物 ； 黃酸 ； 腐植酸

並列摘要

The distribution of soil organic matter of 2coastal forests at the Szehu and Houlong in the western coast of Taiwan was evaluated. The soil pH value (pH(subscript H2O)) in the surface layer was lower than that (pH(subscript H2O)) of the deeper layer, which was due to the abundance of fulvic and humic acids. The water-soluble organic matter, which had mainly accumulated in the surface layer, decreased sharply for soil layers deeper than 5cmin the soil profile. Soil properties at the study sites indicated the rapid decomposition of soil organic matter and lower adsorption of organic carbon by sandy soil, which caused relatively high eluviation in the soil profile. The consequence is that there is no accumulation of organic matter in the lower horizon of the pedon.

並列關鍵字

coastal forest ； soil organic matter ； fulvic acid ； humic acid