- 期刊
作物生長模式推估缺水敏感參數之研究
Parameters for Water Deficit Sensitivity in Crop Models
摘要
作物之生長模式可以提供作物生長與環境關係之模擬，可以節省大量田間試驗之時間、人力與資源，累積資料作為後續與管理之相關研究的基礎，以往簡單之作物產量模式，可回答作物蒸發散量與產量之關係，但是其缺水敏感參數推估不易，甚至有學者認為是適用性不佳。但複雜的作物生長模式往往涉及大量如作物遺傳、地質條件、灌溉管理、耕作方式與氣象資料等參數，雖可較準確的模擬作物的生長過程，包括進入各生長期的時間、乾物質的累積量、葉面積指數與產量等數據，但是模擬模式建立、參數校正與驗證均不容易。本研究的目的在校正與驗證作物生長模式，並利用作物生長模式推估作物產量模式的缺水敏感參數，以建立一般農民可以使用的簡單模式，決定適當的乾旱管理策略，亦可將作物產量模式整合到區域用水規劃或管理決策支援系統，回答農業用水調整對作物產量之影響，作為區域用水調整之決策參考依據。
並列摘要
The growth of crop can be simulated by a well designed crop model. Such model usually need crop cultivar information, weather, soil, irrigation management, and so on. To calibrate and verify this crop model is a tough work. Therefore, the crop model can't be applied widely. Crop yield model is a simple model. The crop yield is a function of evaportranspiration. It is a useful model, if the water deficient sensitive factor of a yield model was given properly. Unfortunately, this factor was variant because of different crop cultivar and cultivating location. Some study even declare that the factor can not be estimated (Ritchie, 1998). In this paper, the parameters of a crop model were calibrated and verified. A methodology was proposed to estimate the water deficient sensitive factors of the crop yield model by using this crop model. It made possible that making irrigation schedule by crop yield model or integrating crop yield model into a decision support system of water resources management.