crop requirement 中文意思是什麼

crop requirement 解釋
作物需水量
  • crop : n 1 農作物，莊稼；收獲；收成；〈the crops〉 一季的收獲量，產量。2 （同一時期出現的人物等）一批，...
  • requirement : n. 1. 要求，需要。2. 要求物，必需品；需要量；必要條件，資格 （for）。
  1. It was found : 1 ) the film restrained evaporation surface intensity and had obvious function of rising and keeping moisture, 2 ) the drip irrigation could supply water according to growing requirement and augment of water conflux intensity around crop root, it also had strongly controllable operation and wasted fewer water

    覆膜抑制了土壤表面的蒸發面匯，具有明顯的提墑保墑作用，滴灌能隨時根據作物生長需要及作物根系匯流強度的增大而補充匯流源，可控性很強，水的浪費率很低。
  2. The estimation methods of water requirement, and determination of basal crop coefficient and soil evaporation coefficient under the controlled alternative furrow irrigation in summer maize were studied and verified in the fifth chapter

    （ 4 ）夏玉米田棵間土壤蒸發主要發生在灌后幾天表層土壤比較濕潤的時期內，其中表層土壤含水率和葉面積指數是影響土面蒸發的兩個基本因素。
  3. At present, the studies about the controlled alternate furrow irrigation are focused on how it affects the water physiological indexes, water consumption and yields of crops. but, some problems suc h as the soil infiltrative parameters, irrigating water advancing, water redistribution in soil, calculation of crop water requirement and water consumption, and the upper and lower limit indexes of soil moisture, guiding a field irrigation after the controlled alternative furrow irrigation is implemented in field, have not been researched systematically and deeply. if these problems could not been solved commendably, the popularization of controlled alternate furrow irrigation will be affected

    然而，目前有關交替隔溝灌溉的研究還主要集中於這種灌水方式對作物水分生理指標、耗水量和產量的影響方面，而對大田採用這種灌水式后的土壤入滲參數變化情況、作物需水量與耗水量計算、以及指導大田灌溉的水分下限控制指標等與大田生產實際密切相關的幾個問題基本上還沒有進行系統的深入研究，而這些問題如不能得到很好地解決，勢必會對這種灌水方式的推廣應用產生嚴重的影響。
  4. Compared with coupling fitness of water requirement to rainfall, crop ' s water requirement and irrigation requirement show the contrary trend

    表明在當地自然資源環境和節水灌溉背景下，不宜過多種植秋播糧食作物，應以春夏播作物為主。
  5. The system is able to efficiently increase temperature and meet crop requirement of temperature for yield. in researching and designing solar energy conserving system in soil for active greenhouse, it adopts instrument of rhlog, tests temperature of six layers to soil temperature, and draws various curve of temperature. it shows the system can efficiency increase soil temperature and reduces change range of temperature in greenhouse in wintertime

    在研究和設計主動式溫室太陽能地下蓄熱系統中，採用溫度自記儀器，測試了室溫及土壤中六個不同深度的溫度數據，繪制了相關溫度變化曲線，該曲線表明了主動式溫室太陽能地下蓄熱系統能有效提高冬季溫室土壤的溫度，並且減小了日溫變化幅度。
  6. These tests enable the better management of the crop ' s nitrogen requirement to prevent head sterility and loss of production when excessive amounts of nitrogen fertilizer are applied

    這些測試方法使人們能夠更好地管理作物的氮素需求，以避免過量施用氮肥帶來的稻穗不育及減產。
  7. Main results are generalized as follows : in dry year, coupling fitness of water requirement to rainfall reaches 90 % for sorghum and spring millet during crop ' s growth and reproductive season in shunyi county, while 85 % for peanut and soybean, 70 % for spring com and cotton, 65 % for alfalfa, and 55 % for cropping pattern of rice followed by wheat

    主要結論包括： 1 ）順義區乾旱年型下，高粱和春谷全生育期需水與降水的耦合度達到90 ；花生和春大豆其次，達到85 ；春玉米和棉花為70 ；苜蓿65 ；水稻和冬小麥?夏作物組合耦合度只有55 。需水量和灌溉定額則與耦合度大小相反。
  8. Decision support system of water requirement forecast for dryland crop

    旱地作物需水量預報決策輔助系統
  9. / based on the trends of present cropping development and irrigation efficiency increase in the region, water supply can meet irrigation by 89 % in 2010, 75 % in 2020 and 70 % in 2030 to crop ' s water requirement under normal condition. water supply can meet irrigation by 100 % in 2010, 88 % in 2020 and 83 % in 2030 to 85 % of crop ' s water requirement under normal condition. the situation of water shortage in the region is more austere in dry year

    3 ）按目前種植業發展趨勢並考慮到灌溉效率的提高，平水年在100充足灌溉方式下， 2010年、 2020年和2030年可供水量對灌溉的滿足率分別為89 、 75和70 ；在85虧缺灌溉方式下， 2010年供水可以滿足需要， 2020年和2030年供水量對灌溉的滿足率為88和83 ；乾旱年度的灌溉滿足率更低，形勢更為嚴峻。
  10. In the fourth part, the field irrigated water requirement were gotten based on the recommended irrigation schedules and irrigated areas often crops. in this paper, the reference evapotranspition et0 in three counties in bid was computed by penman - monteith method and the crop coefficients, kc of ten crops by kcisa model and the crop water requirements, etc, were computed simply by kc et0. meanwhile, four representative years by frequency analysis are gotten according to net irrigation requirements and planted areas of different crops in bojili irrigation district

    本文首先採用fao最新推薦的penman - monteith方法計算灌區的參照騰發量et _ 0 ，用kcisa按照fao的計算方法推求十種作物的作物系數k _ c ；由此基礎上計算出作物需水量et _ c ，根據結果分析了不同作物的需水規律；同時用作物缺水量nir （凈灌溉需水量）進行頻率計算，求出了灌區的四個代表年，並分析了代表年年內自然水分狀況和作物缺水規律。
  11. On this requirement, it is impossible to harvest a mature maize crop in wheat - maize rotation system in many regions

    依此要求，許多地區小麥-玉米輪作制中不可能收獲成熟玉米作物。
  12. The experiment indicates the rate is able to meet crop requirement of yield all the year round the research accomplishes the goal of storing solar energy in summertime and utilizing in wintertime, storing in daytime and utilizing in nighttime, storing in sunshine and utilizing in cloudy sky

    本文研究的太陽能蓄熱系統實現了太陽能夏天貯冬天用、日間貯夜間用、晴天貯陰天用的目的，在不進行人工增溫的條件下，能滿足作物的冬季生長要求。
  13. The function of the software is useful, it has provided many functions such as the calculate of crop water requirement, pipeline layout ( automatic layout and manual operation ) and its optimization, pipe diameter optimization. investment budgetary estimate and economic beneficial result can be result. and can rapid create plan and do plan comparison, the software provides many kinds of result output such as graph. text, table and so on

    該系統可以實行作物需水量計算，系統設計流量推算、管道水力計算、工程投資概算，經濟效益分析等功能，建立了常用的數據庫（管材、管件、水泵和電機等）並對其進行管理和維護，可以實現包括管道布置、管徑優化、管材選擇等多種參數選擇在內的多種方案比較、優選。系統能提供圖形、文本、表格等多種形式的成果輸出，人機交互界面友好，操作方便。
  14. This paper analyzes the relationships among precipitation, runoff and crop water requirement, and investigates the effects of integrated drought - resistant technologies during whole growth period on the production of corn and millet in north part of shanxi province, based on the forecasting of long - term climate trend and the objective assessment of annual water supply and demand on farmlands

    摘要通過對降水量、地面徑流量、作物需水量的綜合分析，結合山西省中長期天氣趨勢預報，在客觀定量地評價年度內農田水分盈虧指標的基礎上，實施集成旱作技術，對玉米和穀子進行全生育期農田管理，取得明顯效果。
  15. Drip irrigation under mul : h is a new irrigation method, as utiliz e the advance of drip irrigation and plastic film cultivation technique. the conditions influenced crop water requirement are changed in drip irrigation under mulch, thus crop water requirement pattern is different from conventional irrigation forms. it is very useful to research field mulched crops water requirement pattern watering with drip irrigation

    膜下滴灌是地膜栽培與普通地表滴灌相結合的產物，在地膜覆蓋和滴灌的綜合效應下，作物的生長與在常規條件下不同，因此影響作物需水量的一些基本條件都發生了變化，對于膜下滴灌作物需水量和作物系數還需要做進一步研究。
  16. Acceding to the theory of crop water requirement, maximum potential evapotranspirations are calculated by applying fao penman - monteith method, and then we obtain the water requirement, water balance and water correction factors ect. of main crops ( spring maize, summer maize, spring wheat, winter wheat, cotton ) and different type grasslands, and the space - time distribution regularities of water requirement of cropland and natural grassland are analysed, the result show : the water requirements of same kind crop in different areas are different, water satified degrees are different to different crops in the same area, and water requirement of same crop are different between years for climatic variation ; the water requirements of main crops are increasing from east to west and from south to north, water satified degrees are decreasing from east to west and from south to north. in growing season, there are deficits in crops water supply in most area, so the irrigation is needed to meet the requirement for crop growing normally

    根據作物需水的理論和方法，採用計算精度較高的faopenman - monteith方法（ 1998 ）計算了半乾旱區最大可能蒸散，並基於此計算五種主要旱地作物（春玉米、夏玉米、春小麥、冬小麥、棉花）和不同類型的天然草地的需水量、水分盈虧、水分訂正系數等，分析了農田和天然草地水分供需的時空分佈規律，結果表明：不同地區同一種作物的需水量是不同的，同一地區對不同作物的水分滿足程度是不同的，而且同一種作物在同一地區隨著氣候的變化需水量也會有一個年際變化；主要作物需水量由東向西，由南向北遞增，正常生長發育的水分保證程度由東向西，由南向北遞減。
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