灌溉工程的重要性

以下是大綱或介紹,如需要完整的資料請購買下載. 本資料已審核過,確保內容和網頁里介紹一致.  
1.無需注冊登錄,購買下載后即可獲取該完整的資料.
2.購買后本站提供下載鏈接或聯系客服發送資料.
資料介紹

灌溉工程的重要性(中文2700字,英文1800字)
灌溉涉及人工提供作物需水。這項技術使用在農業上是為了使植物在沒有足夠雨水時仍能生長,特別是在干旱地區,也同樣應用于較輕干旱的地區給植物結果實時提供水。大約全世界66%的流域水用于農業, 并且灌溉用水繼續增長。但是灌溉系統中50%到60%的水沒有很好的被植物利用。因此建立更為細致的灌溉制度以確保最適宜的農業生產是有必要的。
選擇灌溉方法是隨作物的類型和經濟的背景決定的。對于小面積的土地,擁有網狀開闊的水渠提供水,自流灌溉是最節省最簡單的灌溉解決方法。一些精密的調制解調器技術可以減少水的消耗:滴灌是將水送到植物的根部,噴灌是將水噴灑到整個植物上。

附錄2
Importance of Irrigation Engineering
Irrigation involves artificially providing crops with water. This technique is used in farming to enable plants to grow when there is not enough rain, particularly in arid areas. It is also used in less arid regions to provide plants with the water they need when seed setting. About 66% of the world's water catchment is used in farming, which continues to make increasing use of irrigation. But in most irrigation systems 50 to 60% of the water used does not benefit the plants. It is therefore necessary to set up more carefully designed irrigation schemes that ensure optimum agricultural production while preserving this resource.
The choice of irrigation method depends on the type of crop and economic context. For small areas a network of open channels providing water by gravity remains the least costly and simplest solution. More sophisticated modem techniques can reduce water consumption: drip irrigation delivers the water at the plants' roots and sprinkler irrigation sprays it over the crop.

捕鱼游戏机设备