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頁籤選單縮合
題名 | 大豆蒸發散作物係數之探討=Crop Coefficients of Soybean Evapotranspiration in Taiwan |
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作者 | 施嘉昌; 何信賢; Shih, Charles C. C.; Ho, Shin-shen; |
期刊 | 臺灣水利 |
出版日期 | 19970600 |
卷期 | 45:2=178 1997.06[民86.06] |
頁次 | 頁1-12 |
分類號 | 434.217 |
語文 | chi |
關鍵詞 | 大豆; 作物係數; 蒸發散量; 排水式滲透計; Penman-Monteith公式; Soybean; Crop coefficients; Evapotranspiration; Drainagelysimeter; Penman-monteith equation; |
中文摘要 | 本文乃利用嘉南農田水利會學甲試驗站於民國82至84期間,進行之大豆需水量試 驗來探討在臺灣地區大豆各生長階段之作物係數及其蒸發散量之變化情形。大豆之實際蒸發 散量是利用 3mx5mx2m 大小之排水式滲透計,以定期測定根深土層之土壤水分,配合降雨量 、滲漏量與排出水量資料估算之。大豆生長期間之潛在或最大蒸發散量是利用 Penman-Monteith 公式,配合設置於滲透計附近之氣象站所收集之氣象資料計算之,作物之 實際蒸發散量和潛在蒸發散量之比值即可得到該作物之作物係數。經過三年三期作的試驗觀 測, 大豆生長期間之作物係數, 於初期、發芽成長階段、中期階段及成熟收獲階段分別為 0.47、 0.92、 0.93 及 0.61。 大豆生長期間整個期作之潛在蒸發散量範圍是從 270.6 至 308.2 mm,而實際蒸發散量則由 212.2 至 254.4 mm。大豆生長期間之作物係數變化,是利 用多項式迴歸繪成一作物係數曲線,以分析作物係數與生長天數之關係。本文之目的,即希 望將目前在各種氣侯狀況下, 估算作物蒸發散量最為精確之 Penman-Monteith 公式,引用 於臺灣之氣侯環境之下,而所得到的結果,企望能對臺灣之水資源系統之規劃與設計,及旱 作灌溉之營運管理,有所助益。 |
英文摘要 | Field experiments were conducted at the Hsueh-Chia Experiment Station for spring seasons of 1993-1995 in Taiwan. Crop coefficients and evapotranspiration of soybean (Glycine max. (L.) Merr.) were estimated for the three seasons. Actual evapotranspiration (ETa) of soybean was measured in drainage lysimeter, the size is 3 m x 5 m x 2 m. The weather station was set up in the experimental area, daily climatic data were observed. For the computed reference grass ET base, The estimated mean crop coefficients of soybean are 0.47, 0.92, 0.93 and 0.61 in the initial, crop development, mid-season and late season stages in growing season, respectively. The total ETo of soybean is about 270.6 to 308.2 mm. Seasonal actual ET varied from 212.2 to 254.4 mm in three growing seasons. The relationships between the mean crop coefficient against the days after crop planting and the fraction of the growing season have been analyzed. These data could be useful to determine crop water requirement quickly in Taiwan. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。