混農林地經營對土壤性質之影響

Effect of Soil Properties by Management of Agroforestry Soil

江博能(Po-Neng Chiang) ； 江凱楹(Kai-Ying Chiang) ； 余瑞珠(Jui-Chu Yu) ； 王明光(Ming-Kuang Wang)

《國立臺灣大學生物資源暨農學院實驗林研究報告》 29卷1期 (2015/03) Pp. 1-18

https://doi.org/10.6542/EFNTU.2015.29(1).1

摘要

本研究於國立臺灣大學實驗林管理處內茅埔營林區之混農樣區選取緩衝造林地、果樹混農林地、蔬菜混農林地、廢耕茶園、一般造林地等五個處理樣區土壤性質上的差異，希望藉此研究可了解林地經營方式對土壤環境之改變。研究結果顯示混農林地與一般造林地或緩衝造林地，土壤之pH質、質地、陽離子交換容量、可交換性陽離子、鹽基飽和度、全碳量與有效性磷的數值皆有明顯差異。由於混農林地地表無覆蓋，當豪大雨造成地表逕流，將土壤表層之陽離子、土壤碳、土壤有效性磷往下坡之緩衝林地輸送，並改變原來之土壤性質。對於混農林土壤管理上應加強土壤表層保護以及增加下坡緩衝林地之範圍，最後施用肥料則考量施用次數及施用量，以避免養份流失並對下游集水區優養化。

關鍵字

混農林地 ； 經營 ； 土壤性質

並列摘要

The aim of this study was to investigate differences in soil properties of buffer plantation, fruit-agroforestry, vegetable-agroforestry, banded-tea plant, and general plantation in Neimaopu section, Experimental Forest, National Taiwan University. The study was expected to show change in soil environment due to forest management. The results showed that soil pH, cation exchangeable capacity, exchangeable cations, base saturation, total carbon content, and available phosphorus were significantly different among agroforestry, general plantation and buffer plantation. Due to lack of surface cover on agroforestry soil, heavy rain resulted in surface runoff and changing cations, soil carbon, soil available phosphorus of surface soil having them transported to buffer plantation. Agroforestry soil management should be strengthened to protect soil surface and increase the range of downhill buffer plantation. Finally in order to avoid loss of nutrients and eutrophication at downstream catchment, number and quantity of fertilizer application should be considered.

並列關鍵字

Agroforestry ； management ； soil properties