老埤台地不同植生下土壤孔隙特性之研究

A Study on Soil Pore Space Characteristic under Different Vegetation in Laopi Terrace

黃國禎(Kuo-Cheng Huang) ； 江介倫(Jie-Lun Chiang) ； 黃彥凱(Yen-Kai Huang) ； 邱宏彬(Hung-Pin Chiu) ； 黃瀞瑩(Ching-Ying Huang)

《農業工程學報》 55卷2期 (2009/06) Pp. 81-94

https://doi.org/10.29974/JTAE.200906.0006

摘要

依土壤水分張力與狀態之關係，可將土壤孔隙分爲粗孔隙、中孔隙和細孔隙等。本研究以屏東縣內埔鄉老埤地區洪積母質紅壤爲研究對象，研究對象可分爲六個樣區，包含牧場、荔枝園、香楠林、芒果園、雜木林、鳳梨圈，以隨機之採樣方式採集六個樣區土壤之樣本，分析其理化性質及土壤孔隙特性，並利用士壤水分特性曲線，比較土壤孔隙特性之關係，藉由土壤孔隙特性探討六個樣區之水源涵養能力。
粗孔隙及中孔隙涵蓋土壤水中的重力水和毛管移動水，因此土壤的最大貯水容量可用粗孔隙率及中孔隙率的總和來表示。根據不同植生對水源涵養的結果，以雜木林爲較佳，其次爲牧場、鳳梨園、香楠林及芒果園，而荔枝園地區較差。

關鍵字

紅壤 ； 土壤水分特性曲線 ； 土壤孔隙特性

並列摘要

The properties of the soil pore, depending on the relation of soil water potential (pF value) and the size of pore, can be divided as macropore, mesopore and mieropore. The object soil of the research is the laterite of terrace in Pingtung Laopi. According to different vegetations, there are six sampling areas in this study. The representative soil samples from each sampling area were gathered at random and respectively being
analyzed the physical and chemical properties and soil pore space characteristic. The soil moisture retention curve is used to compare the relation of the soil pore space properties. At last, we compared the capability of water conservation from different vegetation by soil pore space characteristic.
The object places of the research are pasture, litchi garden, machilus zuihoensis forest, mango garden, mix wooden forest, and pineapple garden. The macropore and micropore from different vegetation are very nearly the same in average. The mesopore and micropore includes gravitational water and capillary water' so the soil maximum water-holding capacity could be represented by macropore and mesopore contributions. Results of water conservation represent that shaw ＞ pasture ＞ pineapple garden ＞ machilus zuihoensis forest ＞ mango garden＞ litchi garden.

並列關鍵字

Lateritic Soil ； Soil Moisture Retention Curve ； Soil Pore Space Characteristic