土壤有機質分解聚積之模擬
Other Title
Simulations for the Decomposition and Accumulation of Organic Matter in Soils
Journal
有機質肥料合理施用技術研討會專刊
Part Of
農業試驗所特刊第50號
Pages
84-94
ISBN
957-00-6085-9
Date Issued
1995-12
Date
1995-12
Author(s)
林正錺
林欣華
劉慧甄
Chenfang Lin
Singhua Lin
Hueijen Liu
Abstract
土壤有機質之分解與聚積為一動態過程，其轉化機制之解析及穩定趨向之掌握，實為其他各種研究土壤有機質效應問題之基礎。但由於動態過程的解析不易於一般性的說明使用，本報告即針對有機質在土壤環境中分解的過程及腐植質的聚集，就其問可能存在的轉化機制進行穩定與平衡之分析與模擬，使動態模式轉為線性化代數式，以便於一般性解析應用。首先選擇一代表性動態模式分析其系統參數影響分解過程之靈敏性，作為土壤施加有機質之管理參考。其次利用模式矩陣分析其線性轉化特徵，由特徵值研判有機質穩定分解趨向。所得結果顯示：由宏觀尺度分析土壤有機質的聚集，可藉特徵值與特徵向量來預測其平穩特性。動態模擬亦有相同之效果，可為特徵值分析之驗証，也作為其他非線性模式需採動態模擬之佐證。根據研究結果，本研究進一步就有機質施加量與穩定後土壤有機質含量之關係，將動態系統組轉為平衡線性代數式，解析提示用以估計農地聚集有機質的合理模式，並應用幾個本土實驗數據說明其間之關係，以為各種以提升有機質含量為目的之參考依據。
The decomposition and accumulation of soil organic matter in soil is a dynamic process. To analyze and control the transformational mechanisms is the fundamentals for other researches related to the effects of soil organic matter. This report aims at the analysis of mechanical processes and the transformation of the dynamic model into algebraic equations. Firstly, we chose a representative dynamic model to carry out the sensitivity analysis for every system parameters. The purpose was of showing how to use the method to find some key factors for managing the application of organic matter to soils. Secondly, we transformed the dynamic model into a transitional matrix and defined an eigenvalue to characterize the stability of the matrix. Eigenvalues became an index to show the rate of decomposition after the system being stabilized. Dynamic simulation proved the characteristics of the eigenvalues. Accordingly, the relationship between annual input and stabilized level of soil organic matter was formulated. Several cases were studied as for the references of showing how to improve the level of soil organic contents.
Event(s)
有機質肥料合理施用技術研討會
Subjects
有機質
轉化
模擬
Organic matter
Transformation
Simulation
Publisher
農業試驗所
Type
conference paper
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