2006-04-052024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/657864摘要：本整體計畫目標為瞭解台灣幾種不同耕作制度對生物多樣性之影響、生態系生產力維持機制及其對環境品質之衝擊，故擬探討台灣幾種不同耕作制度下營養元素的收支平衡：包括調節氮素和土壤有機質轉化的微生物交互作用及養分循環之影響，和增進土壤生產力策略下，營養元素之收支平衡。本研究將監測試驗第一年不同期作農試所溪口農場、農試所嘉義分所、本場雲林分場三個試驗場區，不同耕作制度下的土壤性質及作物品質。於考慮不同場區、耕作型態及土壤特性，進行土壤性質測定包括：總體密度、土壤反應、土壤電導度、土壤有機碳、可交換性鹽基、陽離子交換容量與鹽基飽和度，及土壤營養元素化學分析（包括全量與不同型態氮之測定、全量與不同型態磷之測定、全量與不同型態鉀之測定）並測定作物枝條、莖、葉及根（包括榖粒）的氮、磷、鉀濃度及雨水及灌溉水中各離子之濃度分析及水量資料收集.所有分析資料均需採用美國KNB（Knowledge Network for iocomplexity）組織所發展之Morph（Client）-Metacat（Server）系統建置，以便於資料之管理。最後將依所建立之"養分收支模式",推估養分收支是否平衡,多少養分流出土壤<br> Abstract: In order to understand the effects of different cultivation system on the biodiversity, mechanism of maintaining soil productivity, and environmental impacts, we want to study the available soil nutrient contents under different cultivation system, including the interaction among soil nitrogen, organic matter contents, and microbial population and activities, and the effects of microbial population on the soil nutrient cycling and nutrient budget. The objectives of first year project are to monitoring the changes of soil characteristics and crop quality and nutrient budget of three experimental sites under different cultivation systems. These sites include Shee-Ko Experimental Station of TARI (Taiwan Agricultural research Institute), Cha-Yee Branch Station of TARI, Yun-Lin Branch Experimental Station of Tainan District Agricultural Experimental and Extension Station (TADAEES). The soil and crop sampling programs will be considered based on the variations of site characteristics, cultivation programs, and soil characteristics. The monitoring items of soil characteristics will include soil pH, bulk density, soil electric conductivity, soil organic carbon contents, exchangeable bases, cation exchangeable capacity (CEC), base saturation percentage, soil nutrition concentration (total and bioavailability types of N, P, K, and other ions in the soil). The concentration of N, P, K, Ca, Mg, S, and other elements in the rain, irrigation water, and leaves, stems, and roots of different crops are all determined. All the data will be collected from this ecosystem and it can be keyed into the Morph (client)-Metacat (Server) system of knowledge network for biocomplexity. We also want to establish a nutrient budget model to validate the nutrient budget of soil and crop cultivation system under long tern ecological system of different crop systems in Taiwan.養分收支耕作制度農業生態系長期生態研究生產力nutrient budgetcultivation systemagricultural ecosystemlong term researchproductivity