臺灣大學實驗林部分森林土壤用於農業栽培對土壤化學性質、酵素與微生物活性之影響

本研究探討國立臺灣大學實驗林五個營林區中十個既有已混農使用事實之契約林地之土壤化學性質及生物性質與周邊三個林地土壤之差異，以瞭解林地混農經營對土壤性質之影響。採樣地點分別為內矛埔營林區21林班地號322，原為茶園之土壤、水里營林區15林班地號298與18林班地號310之合作造林地、和社營林區27林班地號66、306及354、清水溝營林區10林班地號811與12林班地號44及對高岳營林區29林班地號40與47。均採取表土15 cm之土壤，分別分析其一般土壤化學性質、土壤微生物生質碳與氮、土壤呼吸作用及各種水解酵素之活性。其結果顯示，與周邊之林地比較，種植農作物之土壤因農耕之施肥管理不但改變土壤化學性質，其生物性質亦有大的變化，其土壤有機物之含量約減少三分之一，有效性磷、鉀、鈣與鎂則因施肥而提高。而實驗林表土層土壤所佔的平均比例不及30%，使得森林地轉為農業經營時，不但無法保留養分與水分，也有土壤流失之虞。

關鍵字

土壤有機物；土壤呼吸作用；土壤生質碳；土壤生質氮

並列摘要

The objectives of this study were to investigate the effects of agricultural cultivation on the chemical, biological, and enzymatic activities of the forest soils of the Experimental Forest of National Taiwan University. Ten soil samples from five Tracts that cultivated agricultural crops and three soil samples from forest were selected for the study. The five Tracts were Neimaopu, Shueili, Heshe, Qingshuigou, and Duigaoyue. The soils were sampled to the 15 cm depth. The soil chemical properties, soil biological properties, and soil enzymatic activities were analyzed. The results showed that there were great differences in the chemical, biological, and enzymatic activities of soils compared with the forest soils. The application of agro-chemical and tillage not only resulted in changes in soil chemical properties but also biological properties. The organic matter contents of soils of agricultural uses were one-third less than that of forest soil. In summary, agroforestry had a strong impact on the soil properties including chemical, microbial biomass, and enzymatic activities, likely through soil acidification and fertilizer application. In addition, small proportion of soil fraction in the forest land implies its inadequacy for agricultural used.

並列關鍵字

soil organic matter ； soil respiration ； soil biomass carbon ； soil biomass nitrogen

被引用紀錄

趙淑芬（2014）。實施混農林業政策之關鍵因素探討-以臺大實驗林為例〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2014.11311

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臺灣大學實驗林部分森林土壤用於農業栽培對土壤化學性質、酵素與微生物活性之影響

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