頁籤選單縮合
題名 | 滴水灌溉方法探討高粱需水量之研究= |
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作者 | 施嘉昌; 張本初; |
期刊 | 農業工程學報 |
出版日期 | 19931200 |
卷期 | 39:4 1993.12[民82.12] |
頁次 | 頁13-25 |
分類號 | 434.157 |
語文 | chi |
關鍵詞 | 滴水灌溉; 蒸發量; 蒸發散量; 作物係數; 作物曲線; Dip irrigation; Evaporation; Evapotranspiration; Crop coefficient; Crop curve; |
中文摘要 | 高梁省水灌溉試驗期間自民國79年到81年共三年,包括春作三作,秋作三作,試驗地點位於嘉南農田水利會學甲試驗站,灌溉方法採用滴水灌溉。蒸發散量資料由田區、露天滲透計及自動遮雨棚滲透計同時獲得,每一試驗區共有五種處理兩重覆。灌溉期距以每週之A型蒸發皿蒸發量與有效雨量之差決定。每週並定期測定根系土壤水分遞減率。利用Penman公式應用氣象因子決定潛在蒸發散量,由作物實際蒸發散量與潛在蒸發散量比值決定春、秋作高梁作物係數,利用三次多項式迴歸分析作物係數與生長日數之關係,做成理論作物曲線。作物曲線對於日後決定灌溉期距是一項重要的依據。每一期作高梁收穫後進行乾莖葉重及穀粒產量調查。結果顥示,高梁之作物係數最大值接近於1.0,最高產量每公頃7500公斤,需水量270公厘。 |
英文摘要 | Evapotranspiration experiments of sorghum were conducted in Hsuehchia Experimental Station of Chianan Irrigation Association during 1990 to 1992 for three years. The experiments have been done in three sites such as common field, drainage lysimeter, and auto-rainshelter lysimeter with five treatments and two repetitions under drip irrigation. The irrigation scheduling is considered the factors of evaporation and effective rainfall, soil moisture depletion is controlled for irrigation. Potential evapotranspiration was determined using Penman's equation, and a crop coefficient curve was plotted in spring and fall growing seasons. A third order polynomial crop curve was estimated to relate crop coefficient of growing days since planting. The yield of sorghum was evaluated by random sampling method. The simulated curve shows that the maximum value of sorghum crop coefficient is nearly 1.0, and the maximum grain yield is 7500kg/ha with 270 mm of evapotranspiration. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。