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題 名 | 四湖海岸木麻黃林分生物量及養分量聚集=Accumulation of Stand Biomass and Nutrient Content of Casuarina Plantations in the Suhu Coastal Area |
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作 者 | 陳財輝; 許博行; 張峻德; | 書刊名 | 臺灣林業科學 |
卷 期 | 13:4 1998.12[民87.12] |
頁 次 | 頁335-349 |
分類號 | 436.19 |
關鍵詞 | 木麻黃; 海岸防風林; 生物量; 養分量聚集; Casuarina; Coastal windbreaks; Biomass; Nutrient content accumulation; |
語 文 | 中文(Chinese) |
中文摘要 | 調查雲林縣四湖海岸木麻黃人工林土壤物理性質及1995-1997年間林分生長現況, 並以分層取樣法估算林分生物量,之後分析及計算林分養分聚集量。 四湖 3 年生林分為砂 土, 而 9 年生林分則為壤質砂土,後者之土壤含水量、細孔隙量及土壤之砏、粘粒含量明 顯較高,且其透水速度較低,可看出 9 年生木麻黃林地土壤地質較佳。四湖 3 年生 23 號種 源林分葉、枝、幹、根及合計生物量為 4.8, 8.8, 17.3, 7.9 及 38.7 ton/ha,各部位 比例為 12.4:22.7 44.7:20.4,1 號種源林分生物量皆較 23 號種源低;9 年生林分、 枝、幹、根及合計生物量分別為 7.4,27.6,63.5,20.8 及 119.3 ton/ha,各部位比例為 6.2:23.1:53.2:17:17.4。可見 9 年生林分葉量比例較少,而枝、幹量的比例則有增多傾 向、氮、磷、鉀、鈣、鎂及鈉等各種養分聚集量,3 年生 23 號種源為 566,14.03,52.96, 150.61,17.54,77.7kg/ha,3 年生 1 號種源林分養分量皆較 23 號種源低,而 9 年生養分 量依順為 785.2,21.39,230.31,845.08,51.57,147.9kg/ha。 四湖 3 年生林分保持旺 盛的生長, 且氮年養分增加量以 23 號種源 409.9kg/ha 最高,而 9 年生年養分量則僅增 加 10.7kg/ha。 四湖 9 年生林已發生競爭,增加量與枯死量相互抵銷,以致林分生物量及 養分量聚集不再增加。 |
英文摘要 | Soil physical properties, biomass, and nutrient accumulation of casuarina stands were investigated in the Suhu coastal area of Yunlin county. The soil moisture content, fine porosity component, and silt and clay contents were abundant in the 9-yr-old stand, but the water percolation rate had decreased. The total biomass of the 3-yr-old stand (code 23 provenance) was 38.7 ton/ha (4.8,8.8,17.3, and 7.9 ton/ha for leaves, branches, stems, and roots, respectively); the biomass of code 1 also 3-yr-old was slightly lower than that of code 23; whereas that of the 9-yr-old stand was 119.3 ton/ha (7.4,27.6,63.5, and 20.8 ton/ha for leaves, branches, stems, and roots, respectively). The percentage of total biomass of leaves decreased, whereas the percentages of total biomass of branches and stems increased with casuarina stand growth. The amounts of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sodium (Na) were 566,14.3,52.96, 150.61, 17.54, and 77.7 kg/ha, respectively, in the 3- yr-old stand (code 23); the nutrient contents of code 1 were lower than those of code 23; and amounts were 785.2,21.39,230.31,845.08,51.57, and 147.9 kg/ha, respectively, in the 9- yr-old stand. The annual nutrient increment in the 3-yr-old stand (code 23) reached 409.9 kg ha �笐� yr �笐�, whereas that in the 9-yr-old stand was small, with a maximum of 10.7 kg ha �笐� yr �笐�. There was obvious vigorous growth in the 3-yr-old stands, whereas the 9-yr-old stand was experiencing intense competition; the growth increment was offset by the wither amount, with the result that there was nearly no more increment in stand biomass or nutrient content. |
本系統中英文摘要資訊取自各篇刊載內容。