以土壤地景模式預測鐵錳結核深度與灰斑深度之校正與驗證
Other Title
Calibration and Validation of a Soil-Landscape Model for Predicting Soil Depth of Iron and Manganese Concretions and Grey Mottles
Journal
中國農業化學會誌
Journal Volume
37
Journal Issue
4
Pages
498-515
Date Issued
1999-12
Author(s)
鄭智馨
陳尊賢
郭鴻裕
Chih-Hsing Cheng
Zueng-Sang Chen
Horng-Yuh Guo
Abstract
地形的條件可影響土壤之生成與化育作用。本研究之目的為整合地理資訊系統之空間分析與土壤性質之資料，選擇桃園縣蘆竹鄉南崁附近之兩種母質化育生成之土壤，建立土壤地景模式，以研究其土壤中鐵、錳結核與灰斑出現深度與地景因子間的關係。選擇的地景因子變數，包括海拔高度、距河流的距離、距灌溉渠的距離、距灌溉水埤的距離、距道路的距離、與距住宅區的距離等。調查區域（面積1736公頃）共採得之212個土壤剖面，其田間形態特徵之資料與所有的地景資料，均以網格式地理資訊系統之資料儲存。土壤採樣從表面起至150公司深每10公分採一層，每層分別採樣及記錄其形態特徵。以多變值區別分析，建立土壤剖面中鐵、錳結核與灰斑出現深度與地景變數間的土壤地景模式。研究結果顯示，鐵、錳結核在剖面出現深度之分佈，主要受距河流的距離與距住宅區的距離之影響，灰斑出現之深度，則受距住宅區距離的影響；意即離住宅區愈近，其土體呈較強氟化態，則鐵、錳結核及灰斑出現之深度將愈深。在紅壤母質化育生成之土壤，以土壤地景模式預測土壤鐵結核、錳結核與灰斑出現深度的準確率均為60%左右，但在礫石或砂石母質化育生成之土壤，以土壤地景模式預測鐵結核、錳結核出現深度的準確率可高達90%左右。
The soil formation and pedogenic processes can be affected by soil topographic conditions. The objective of this study was to integrate spatial analysis of the geographic information system (GIS) and soil properties in order to describe the relationships between landscape factors and soil depth of Fe concretion, Mn concretion, and grey mottle in rural area. The soils in the study area, Nankang, Taoyuan of northern Taiwan, were derived from two parent materials. The quantitative variates of landscapes selected in this study included elevation, distance to local stream, distance to local irrigation channel, distance to local irrigation pond, distance to local road, and distance to living area. The study area included 212 soil pedons (0-150cm depth) which were sampled in 1736 hectares, and soil morphological characteristics were also stored as a GIS database. Then they were processed using multivariate discriminant analysis to establish the soil-landscape model. The results indicated that the soil depth of Fe concretion or Mn concretion in the profile was related to the distance to local stream or distance to living area while the soil depth of grey mottle was related to the distance to local living area. The shorter the distance to living area, the more oxidized conditions is in the soil pedon and the deeper the Fe and Mn concretions and grey mottles distribute in the soil profile. The accuracy of predicting soil depth of Fe concretion and Mn concretion in red earth using a soil-landscape model was about 60%, but it increased to about 90% in sandy soils derived from gravel or sand.
Subjects
地理資訊系統
土壤地景模式
鐵結核
錳結核
灰斑
多變值區別分析
土壤調查
geographic information system
soil-landscape model
Iron concretion
Manganese concretion
Grey mottle
Multivariate discriminant analysis
Soil survey
Publisher
中國農業化學會
Description
本研究承行政院農業委員會委託計畫(84-科技-2.1-P-01(1))經費之補助，特此致謝。
Type
journal article