agricultural watershed 中文意思是什麼

agricultural watershed 解釋
農業集水區
  • agricultural : adj 農業的，耕種的，農學（上）的。 an agricultural experimental station 農業試驗場。 agricultural...
  • watershed : 〈英國〉分水嶺；〈口語〉流域。
  1. The adjustive strategy of agricultural structure in mountain watershed - a case study from shiwanxi watershed in kai county, chongqing city

    以重慶市開縣石碗溪小流域為例
  2. Development of water - saving agriculture, dry fanning and ecological agriculture, construction of fine quality product centers of gain, cotton, oil and tobacco, well - bred breeding, reform of middle and low yield fields, small watershed control, processing and storage of agricultural and sideline products, production of high - efficiency low toxicity and safe biological pesticide, construction of livestock breeding centers

    節水農業、旱作農業、生態農業開發，糧、棉、油、煙優質產品基地建設，良種繁育，中低產田改造，小流域治理，農副產品加工貯藏，高效、低毒、安全生物農藥及高效有機肥生產、養殖業基地建設等。
  3. As the agricultural nfs is the most important factor for water environmental deterioration and lake eutrophication in china, more and more scientists and technologists focus on the control countermeasurc and pollution mechanism of agricultural non - point source ( nfs ). based on the investigation of natural resource and agricultural distribution, the loss rule of nitrogen and phosphorus in the typical land of qiandao lake watershed and distribution rule of the phytoplankton and physico - chemical characteristic in the lake were studied, and the input loading of nitrogen and phosphorus was also calculated by the annagnps model in this thesis. according to the routine monitoring data of the water environment in qiandao lake from 1989 to 2001, the concentrations of toxic substance and heavy metal were under the monitoring limit, but the total nitrogen ( tn ) and total phosphorus ( tp ) were much higher than the criterion for lake and reservoir

    本文調查了千島湖流域的自然資源和農業生產情況，研究了典型坡地降雨徑流中的氮、磷污染物的輸出規律，利用annagnps模型估算流域農業非點源污染物輸入負荷，並在千島湖內設點采樣，對水質理化指標和浮游植物群落進行系統的研究，得出以下結論： 1989 2001年間的水環境常規監測資料統計分析表明，有毒物質和重金屬濃度長期在監測下限內， no _ 2 - n 、 no _ 3 - n 、 nh _ 3 - n年平均濃度均符合類標準，但湖泊水庫特定項目tn和tp濃度分別為超類和類，呈嚴重超標狀況，湖區主要污染因子是將導致富營養化的物質tn和tp 。
  4. According to natural conditions of the area, natural rules and systematic engineering principle, a series of countermeasures were propased such as improving forest cover degree, enhancing water conservancy project, adjusting agricultural production constitution, combining engineering measures with ecological measures to restore mine ecosystem and to take comprehensive measures to control soil erosion so as to improve ecological environmental quality in watershed between the yangtze river and the huaihe river

    針對研究區域的自然環境條件和社會經濟狀況，按照系統工程的原理，從遵守自然規律的角度出發提出了提高森林覆蓋率，加強水利工程建設，改良土壤，因地制宜調整農業產業結構，工程措施與生物措施相結合進行礦山修復，治理水土流失，搞好生態環境保護規劃，大力發展生態旅遊，提高公眾的環境意識，依靠科技進步促進地方經濟發展的一系列改善江淮分水嶺地區生態環境問題的對策。
  5. Small watershed management based on landscape pattern and agricultural input - output

    基於景觀格局和農業經濟分析的小流域治理
  6. Constructing a new type of eco - agricultural industry for small watershed in the mountain area a case study of the chenjiagou watershed in wanzhou, chongqing

    以三峽庫區重慶萬州陳家溝小流域為例
  7. The results indicate that the benefit of watershed water reduction by engineering harness of soil and water conservation was 18. 1 % on what had been achieved in the period of the sixth five - year plan, and that the benefit by ecological and agricultural harness of soil and water conservation was 10. 9 % on what had been achieved in the period of the seventh five - year plan

    計算結果顯示，在「六五」基礎上王東溝小流域以梯田建設、土地平整、溝坡道路防蝕技術為主的水土保持工程措施平均減少地表徑流18 . 1 % ，而在「七五」基礎上以人工林草植被建設為主的生物措施和調整土地利用結構、擴大經濟林果種植面積的農業措施共減少地表徑流10 . 9 % 。
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