不同土地利用方式對土壤有機質及團粒穩定度之影響

Influences of Different Land Uses on Soil Organic Matter and Soil Aggregate Stability

王建昇(Chien-Sheng Wang) ； 林亭君(Ting-Chun Lin) ； 艾至宣(Chih-Hsuan Ai) ； 林宗輝(Tsung-Hui Lin) ； 簡士濠(Shih-Hao Jien)

《土壤與環境》 15卷1&2期 (2012/12) Pp. 63-76

https://doi.org/10.30058/SE.201212.0005

摘要

Soils at flat areas in Taiwan are usually for rural usage. Different landuse and unsuitable management result in decrease of soil quality. Pingtung is an important agricultural area in Taiwan, where exhibited diverse landuse for agriculture. This study collected 165 soil samples under different landuse with the same soil type in the study terrace to evaluate the influences of different landuse on soil organic matter (SOM) and soil aggregate stability (AS). The major 7 landuse including broadleaf forest, bamboo, grass, pineapple, papaya, banana, and betel nut trees were found at the terrace. The results revealed that SOM obviously reduced landuse was converted from forest into papaya, banana and betel nut planting; the organic carbon storage decreased 4.35 Mg ha^(-1), 10.8 Mg ha^(-1) and 13.4 Mg ha^(-1), respectively. The AS was positively related to SOM (r = 0.48, p ＜ 0.01), amorphous Fe (Feo) (r = 0.47, p ＜ 0.01) and Al (Alo) (r = 0.34, p ＜ 0.05), fulvic acids (FAs) (r = 0.42, p ＜ 0.05) and humic acids (HAs) (r = 0.32, p ＜ 0.05). Our results indicated that inorganic components such as amorphous Fe and Al were also important cementing materials between soil aggregates.

關鍵字

土地利用 ； 土壤有機質 ； 團粒穩定度 ； 無定形鐵鋁 ； 黃酸 ； 腐植酸

並列摘要

Soils at flat areas in Taiwan are usually for rural usage. Different landuse and unsuitable management result in decrease of soil quality. Pingtung is an important agricultural area in Taiwan, where exhibited diverse landuse for agriculture. This study collected 165 soil samples under different landuse with the same soil type in the study terrace to evaluate the influences of different landuse on soil organic matter (SOM) and soil aggregate stability (AS). The major 7 landuse including broadleaf forest, bamboo, grass, pineapple, papaya, banana, and betel nut trees were found at the terrace. The results revealed that SOM obviously reduced landuse was converted from forest into papaya, banana and betel nut planting; the organic carbon storage decreased 4.35 Mg ha^(-1), 10.8 Mg ha^(-1) and 13.4 Mg ha^(-1), respectively. The AS was positively related to SOM (r = 0.48, p ＜ 0.01), amorphous Fe (Feo) (r = 0.47, p ＜ 0.01) and Al (Alo) (r = 0.34, p ＜ 0.05), fulvic acids (FAs) (r = 0.42, p ＜ 0.05) and humic acids (HAs) (r = 0.32, p ＜ 0.05). Our results indicated that inorganic components such as amorphous Fe and Al were also important cementing materials between soil aggregates.

並列關鍵字

Aggregate stability ； amorphous iron and aluminum ； fulvic acids ； humic acids ； land uses ； soil organic matter