field water content 中文意思是什麼

field water content 解釋
天然含水量
  • field : n 菲爾德〈姓氏〉。n 1 原野,曠野;(海、空、冰雪等的)茫茫一片。2 田地,牧場;割草場;〈pl 〉〈集...
  • water : n 1 水;雨水;露;〈常作 pl 〉 礦泉,溫泉;藥水。2 〈常 pl 〉水體;水域;水道;海;湖;河;海域;...
  • content : n 1 容積,容量,含量,【數學】容度;收容量。2 【哲學】內容 (opp form);要旨,真意。3 〈pl 〉內...
  1. Water content at field capacity is usually expressed as a percentage of the weight or volume of oven - dry soil

    土壤含水量一般用干土壤的重量或體積百分比來表示,它受土壤質地的影響。
  2. In conclusion, the variable degree of the soil water properties and bulk density in different layers is water content > wilting point > field capacity > saturation > bulk density

    總的來看,各水分特性在剖面各層的變異情況為:含水量>萎蔫含水量>田間持水量>飽和含水量>容重。
  3. The coefficient of variation of saturated water content decreased with the depth of profile. the coefficient of variation of bulk density and field capacity fluctuate with depth of soil

    飽和含水量的變異系數都隨深度的增加逐漸降低,含水量、容重和田悶持水量的變異系數隨深度的呈波動變化。
  4. In recent years, the water - saving and control irrigation technique of rice has diverted from plot experimental and demonstration to lare scale. and has got remarkable economic and social benefits. amed at the characteristics of this irrigation area, optimal selection for water - saving techniques of rice, deciding the amout of leaching water and irrigation modles, investigating the adaptability of the water - saving and control irrigation technique in saline land. studying the increase in production mechanism of the technique are important to extend the technique, to better and develop saline land as well as slick spots. according to the results of field experiments, optimization study was conducted on the water - saving irrigation technique of rice in saline land, the effects of different water - saving irrigation techniques on the physiological indexes and yield of rice were systematically analyzed. by using mutiplepurpose fuzzy optimization method, better. water - saving irrigation technique was selector out, that is. the control irrigation technique in rice. the mechanism of it was analyzed from the aspect of the physiological and ecological saving water of rice to provide the implemental process and technical point ; throgh the quantitive analysis and comparision on control irrigation and control class ( flood irrigation ), high production and quality mechanism of the technique was analyzed in terms of physiology indexes of rice, the variation of soil moisture, the pest resistance and the lodge resistance, the change of soil temperature in paddy fields. the yield constitutive factors, the quality of rice and so on. in saline land. control irrigation and intermittent leaching modles were adopted to validate the adaptability of the technique in irrigation of rice in saline land, to analyze rice ' s physiological - ecological indexes and the change of soil salt content under the conditions of control irrigation leaching of rice and and to provide control irrigation and combined modle of intermittent leaching to adapt to different conditions

    本文從試驗及試驗資料入手,取得以下主要成果和結論:對鹽堿地水稻節水灌溉技術進行優化研究,系統地分析了不同節水灌溉技術對水稻生理指標及產量的影響,採用了多目標模糊優化的方法,對灌水技術進行綜合評判,優選了節水灌溉技術,論證該地區宜採用水稻控制灌溉技術;闡述控灌技術通過調節和控制水稻的需水規律,降低水稻高產情況下的無效水量消耗,從水稻生理、生態節水兩方面分析了控灌技術節水機理,針對性地總結出水稻各生育期實施節水控灌技術的步驟及技術要點;通過控灌與淹灌的定量對照比較,從根系、莖蘗、冠層葉片及綠葉動態到株高,土壤水分變化,抗病蟲害、抗倒伏能力,稻田土溫變化,產量構成因素及稻米品質等諸多方面進行動態比較,分析控灌技術高產優質機理;在鹽堿稻地採用控制灌溉+間歇淋洗模式,跟蹤測試田間水鹽變化狀況,驗證控制灌溉技術在鹽堿地區水稻灌溉中應用的適應性,通過分析水稻控制灌溉淋洗條件下水稻生理生態指標,提出優化控制灌溉+間歇淋洗組合模式,為進一步在高礦化度地區試驗水稻控灌技術奠定基礎。
  5. As a result it enhanced the water - retaining and fertility - retaining capacity, strengthened the anti - scour and anti - erosion ability. 3. sabaigrass can meliorated the little entironment of purple soil bare slope field the results show that sabaigrass treatment and grass tree solid plating treatment can reduce n ( nitrogen ), p ( phosphorus ) and k ( potassium ) erosion, increase soil nutrition element content, it also increase soil water content and soil pondage, decrease soil water evaporation, strengthen the anti - drought ability

    龍須草能改善紫色土荒坡地的小生境龍須草純種植被和林草立體種植植被能不同程度地增加土壤的有機質和速效n 、 p 、 k的含量;增加土壤含水量和貯水量,減緩和減少土壤的水分蒸發,增強土壤的抗旱能力;降低土壤盛夏的地表最高溫度,減少地表溫度變化幅度。
  6. A set of microemulsions of water / span80 / transformer oil with different water content are prepared and their optical activity are measured with the changes of applied electric field and, the angle between the electric vector of the incident linearly polarized light and the external electric field, using an automatic polarimeter

    對于某一濃度的微乳液,在外電場的作用下,旋光角平隨0變化且先增大后減小。實驗測得微乳液的電致旋光效應為正,即外電場作用下,微乳液樣品為右旋物質。
  7. Application the retrieval coefficients of the city of changchun in april to a field experiments in jilin province, on april 22 demonstrate the airborne up - looking microwave radiometer can detect cloud liquid water and supercooled liquid water content

    此外,本文將求得的長春地區4月的反演系數應用到長春4月22日的一次飛行實驗中,結果表明,能夠探測出雲中液態水和過冷水含量及其變化。
  8. Then i discussed methane desorption properties including cbm - bearing saturation, critical desorption pressure, the ratio between critical desorption pressure and original coal reservoirs pressure and difference of terra decompression ; cbm - bearing characteristics of coal seams including measured / academic cbm - bearing content, coalbed methane resources content and cbm resources abundance, etc. the author respectively gave a brief account of the basic characteristics of ancient and today ' s geothermic field at 1000m and 2000m depth, coal measure strata pressure field at the depth less than 1600m, structural stress field from jurassic to present, and ancient and today ' s fluid potential field ( that is water potential and gas potential distributing in coal measure strata )

    分別簡述了準噶爾盆地1000m及2000m深度今古地溫場、 1600m以淺的煤系地層壓力場、侏羅紀至今地應力場及煤系地層水勢與氣勢分佈的今古流體勢場基本特徵,進而對這「四場」特徵及其互動關系與煤儲層物性、可采性及煤層氣聚集的關系進行了探討。從構造背景、構造演化及構造類型幾方面論述了本區構造作用的控氣特徵。
  9. Disperse state of oil in oil - field produced water and oil content measurement

    油田采出水中油的分散狀態及含量的測定方法
  10. The initial field of the model is the in situ observational data. combining the observational data by the doppler weather radar, the distribution and evolution of macro - physical as well as micro - physical variations such as wind field structure, radar echo structure, overhang echo, bound weak echo region, strong echo wall, water content, etc. in the storm were analyzed

    利用中國科學院大氣物理研究所建立的完全彈性三維雹雲數值模式,模擬了1996年6月29日發生在北京東北部京冀交界地區的一次強單體雹暴過程,並結合多普勒雷達探測資料,分析了風暴的流場結構,雷達回波結構特徵,含水量場等宏微觀物理量的分佈及其演變。
  11. Outline the actual state of the research in the field of topography measure of intertidal flat and soil water content monitoring by remote sensing at home and abroad

    其主要內容包括: 1總結國內外潮灘地形測量和國內外遙感監測土壤水分的研究現狀; 2
  12. At the same time the study analyse the structural system of the index and it ' s weight with the ahp, and choose soil quality, soil thickness, the content of organic matter, terrain, elevation and the ration of irrigated guarantee as gradation index and choose soil quality, soil thickness, the content of organic matter, terrain, elevation, the ration of irrigated guarantee, the condition of traffic, the distance from the central city, the scatter degree of field, the neat degree of field, loss of water and erosion of soil and land contamination as classification index. at the same time the study emphasize the effect of the condition of ecological condition and environmental contamination

    採用層次分析法對該區域農用地分等定級的指標體系及其權重進行了研究,選擇表層質地、土層厚度、有機質含量、地形、海拔、灌溉保證率等6項指標參與分等評價,選取表層質地、土層厚度、有機質含量、地形、海拔、灌溉保證率、對外交通狀況、距市中心距離、田間道路狀況、田塊分散度、地面平整度、水土流失、土地污染等13個因子分指標區進行定級評價,強調了生態條件及其環境污染狀況在農用地分等定級中的作用。
  13. Standard test method for field determination of water moisture content of soil by the calcium carbide gas pressure tester

    用碳化鈣氣壓檢驗器法現場測定土壤中水含量的標準試驗方法
  14. After the development of more than 20 years, the gudao oil field south region has come to high water content late production stage. how to further improve oil field development level, and how to achieve stable and high producing ability is the main technique subject at present

    孤島油田南區經歷20多年開發,目前已進入高含水後期開采,如何進一步提高油田開發水平,實現穩產高產是擺在目前的主要技術課題。
  15. In addition, the model of interaction of water and temperature between field water vaporization and soil water storage, temperature and millet weight is gotten by field trial. 2. the ammonia volatilizing of fertilizer is suit to the dynamic equation as y = a + bt, the coefficients in the equation are related to the kind of fertilizer, temperature and water content of soil, and the dynamic equation about ammonia volatilization including water and temperature and the is developed

    肥料氨累積揮發量符合零級反應動力學方程y = a + bt ,方程中系數與肥料種類、溫度和土壤含水量有關,碳銨a 、 b值均比硫酸銨高,土壤含水量增大, a 、 b值降低,溫度升高, a 、 b值增大,並由此得到含溫度或土壤濕度因子的肥料氨揮發動力學方程,並建立了含水、熱因子的肥料氨揮發水熱耦合效應動力學方程。
  16. Based on this, the upper controlling index of soil water content is 80. 4 % and the days of waterlogged and salinization tolerance is 3. 2 days. the moisture and salinization movement mathematical model in the field under subdrainage condition is based on the assumption of neglecting the effects of horizontal hydraulic gradient, it can analogy the changes of soil water content and salinization which are changed with times and depth

    論文在忽略水平方向水力梯度影響的假定下建立了排水條件下麥田水鹽運移模型,模擬土壤水鹽含量隨時間、空間的變化情況。經與實測資料對比發現,計算值與實測值較為接近,故該模型及參數的確定是合理的,可用於預測麥田水鹽的動態變化。
  17. The variation curves of yield and grain protein content with soil water content ( or nitrogen ) were convex in high fertility ( or soil water content were 70 % and 80 % of field maximum moisture capacity ), and the soil water content ( or nitrogen levels ) before maximum protein content ( or maximum yield ) were the soil water content ( or nitrogen levels ) of coordinated variation of yield and grain protein content. [ conclusion ] coordinated variation of yield and grain protein content was possible in suitable condition

    在高肥和土壤水分含量為田間最大持水量的70 %和80 %條件下,產量和蛋白質含量曲線均為凸型,蛋白質含量達到最大值之前對應的土壤水分含量為高肥條件下產量和蛋白質含量協同變化區間;產量達到最大值之前對應的施氮量為土壤水分含量為田間最大持水量的70 %和80 %條件下產量和蛋白質含量協同變化區間。
  18. The relationship between relative evapotranspiration and leaf area index and surface soil water content in winter wheat field of north china plain

    華北平原冬小麥相對蒸散與葉面積指數及表層土壤含水量的關系
  19. This paper discusses how to supervise the salt field water by using remote sensing technology, the main content in the dissertation include : ( 1 ) the background and significant of the study

    本文就遙感技術在鹽田水體監測中的應用進行了研究和探討,主要內容包括: 1介紹了本文的研究背景和意義。
  20. The results from research on the spatial - temporal variability of soil water content, spatial variability of soil water content of different layers and soil water - storage in sloping field can be showed. 1

    本文對丘陵區坡地土壤水分含量的時空變異、坡面各層土壤水分特性及容重的空間變異和坡面土壤水庫貯量的空間分佈進行研究,得出了以下結果: 1
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