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water     
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  水分
    Study on Runoff and Water Balance Model under Mechanized Conservation Tillage for Dryland Farming
    旱地机械化保护性耕作径流与土壤水分平衡模型试验研究
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    The Experimental Studies on Water Relations of Soil-Plant System
    土壤—植物系统水分关系的试验研究
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    Research on Soil Water Character and Crop Water Simulaton Information System in Hilly Red Soil
    低丘红壤水分特性和农田作物水分模拟信息系统研究
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    Study on Fast-Measurement of Soil Water Content and Application Technology
    土壤水分快速测量方法及其应用技术研究
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    Experimental Study on Transport of Phosphorus and Water in Soil from Sloping Land
    坡地土壤磷素与水分迁移试验研究
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  水量
    Using Field Water Balance Model to Estimate the Percolation of Soil Water
    应用农田水量平衡模型估算土壤水渗漏量
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    Study on Field Water Balance of Loess Plateau
    黄土高原农田水量平衡研究
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    Sensibility of the Field Water Budget Model to Water Extraction Function by Roots and Evapotranspiration form
    农田水量平衡模型对作物根系吸水函数及蒸散公式的敏感性
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    VARIATION CHARACTERISTICS OF FIELD WATER CONSUMPTION AND SOIL WATER DEFICIT FOR SOME CROPS GROWING ON THE RAINFED LOESS PLATEAU OF EASTERN GANSU
    陇东黄土旱塬区几种作物田间耗水量及土壤水分亏缺分异特征
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    The data showed that water content of the surface layer of two observation point in ridge section was 65% and 66% of field capacity before irrigation,respectively,while increase to 73% and 80% after 144 hours(6 d) and to 78% and 79% after 408 hours(17 d) because of the furrow water's lateral infiltration after irrigation.
    试验数据显示,在本试验条件下,垄背剖面的两个观测点表层,灌水前其含水量仅为田间持水量的65%和66%,灌水后垄沟水分的侧向入渗,144 h(6 d)分别达到田间持水量的73%和80%,408 h(17 d)达到田间持水量的78%和79%。
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  含水量
    The Beck Formula Revision for  ̄(222)Rn Escape and the Water Content in the Indirect Measurement of Gamma Radiative Dose Rate from Soil
    土壤γ辐射剂量率间接测量中的~(222)Rn析出和含水量修正
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    The results showed: During the whole maize development,the soil water content in plough layer by cover residue increased by 0.58%~4.76% compared to conventional tillage.
    结果表明:秸秆覆盖在整个玉米生长发育过程中耕层土壤含水量比传统耕作提高0.58%~4.76%,平作土壤含水量高于垄作。
短句来源
    In 0~20 cm layer the soil water content by CS and covering treatments,were both higher than by non-residue treatment.
    在0~20 cm土层内覆盖处理的土壤含水量均高于无秸秆处理。
短句来源
    the soil water content of shifting dune(1.27%~1.73%) increased from the foot of dune to the crest,while the fixed dune(1.75%~1.11%) was reverse. Additionally,by using standard deviation and variation coefficient,the vertical layers of soil water content were divided into three layers,i.
    流动沙丘含水量(1.27%~1.73%)从上部到下部依次升高,而固定沙丘(1.75%~1.11%)则与此相反;
短句来源
    The results showed that the soil water content below 60 cm soil layer decreased with the increase of fencing time,the soil water content decreased from 25.62~29.84 g.
    结果表明,随着封育年限的增长,沙地60 cm以下各层的土壤含水量逐渐减少,土壤含水量由25.62~29.84 g.
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  供水
    RESEARCH ON WATER SUPPLY CHARACTERISTICS OF SOIL MOISTURE BEFORE SOWING OF WINTER WHEAT
    冬小麦底墒供水特征研究
短句来源
    A Philip Model of Film Hole Infiltration under Adequate Water Supply
    充分供水条件下膜孔入渗的Philip模型
短句来源
    Experimental Study on Water and Salt Transport Characteristics Under Infiltration of Non-sufficient Trickle Irrigation
    非充分供水条件下滴灌入渗的水盐运移特征研究
短句来源
    The influence of soil texture bulk density and water applied methods on point source infiltration
    土壤质地、密度及供水方式对点源入渗特性的影响
短句来源
    3.Both water and phosphorous could increase to transport the nitrogen > phosphorous ^ potassium nutrient to plant's above-ground parts.
    3、水、磷对氮、磷、钾养分向地上部运输都有促进作用,有限供水条件下,施磷处理氮、磷、钾向地上部运输的比例大于不施磷处理。
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      water
    The water-soluble glucan was obtained from Pleurotus florida fruit bodies by hot water extraction, ethanol precipitation, DEAE cellulose dialysis and Sephadex G-75 gel filtration.
          
    Water and methanol extracts prepared from the stem of C.
          
    Berberine present in the water and methanol extract was determined by RP-HPLC.
          
    Methanol extracts demonstrated better inhibitory effects on cultured L929 cells followed by purified berberine from cell suspension cultures and water extracts.
          
    The rolling development model of ecological economy combined water conservancy construction with schistosomiasis control
          
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    This paper deals with the measures of vacuum fumigation withmethyl bromide or ethylene oxide to control stored product pests forplant seeds or animal diseases,In 1976-1979 a PCV-1000 precedure con-trol vacuum fumigator was manufactured.It consisted of a 1m~3 circu-lar steel chamber with equipments associated pumping,heating andfumigant vaporizing,an operating case and the decomposition arrang- ment of the fumigant vapor(methyl bromide and ethylene oxide).The test results indicated that the 2-3 hour fumigation...

    This paper deals with the measures of vacuum fumigation withmethyl bromide or ethylene oxide to control stored product pests forplant seeds or animal diseases,In 1976-1979 a PCV-1000 precedure con-trol vacuum fumigator was manufactured.It consisted of a 1m~3 circu-lar steel chamber with equipments associated pumping,heating andfumigant vaporizing,an operating case and the decomposition arrang- ment of the fumigant vapor(methyl bromide and ethylene oxide).The test results indicated that the 2-3 hour fumigation with methylbromide at a dose of 75-90g per m~3 and the 3 hour fumigation withethylene oxide at a dose of 90-120g per m~3 which were at a pressureof 2-3 cm Hg absolute,were effective in controlling the insect sampleswrapped in various ways,such as the larvae of khapra beetle(Tro-goderma granarium Verts,Trogoderma persicum Pic.),the adults of ricebore beetle(Rhizopertha domica(F.)),red flour beetles(Triboliumcastaneum(Hbst.))and rusty grain beetles(Cryptolestes ferrugineus(Step.)),the rice weevils of all stages(Stophilus oryzae(L.))and Chi-nesis weevils(Callosobruchus chinensis(L))etc.The 5 hour fumigationwith ethylene oxide at a dose of 500g per m~3 and the 12 hour fumiga-tion at a dose of 300g per m~3 which were at a pressure of 2cm Hg abso-lute,were effective in destroying the animal“Anthrax”germs.The5 hour fumigation with the mixture of ethylene oxide at a dose of 40gper m~3 and methyl bromide at a dose of 160g per m~3 at a pressure of2cm Hg absolute were effective in controlling the germs of Fusariumwilt of cotton(Fusarium oxysporium(ATK)).Afterwards the residual fumigant was pumped out from the cham-ber and air-washings were twice carried out.The chamber was thenopend.The atmosphere in the case was tested to ensure that methylbromide or ethylene oxide residual quantity did not far exceed themaximum allowable concentration.The 5% NaOH alcohol solution used to decompose methyl bromidecould produce 96 per cent effect while water used to decompose ethyle-ne oxide could produce 97-98 per cent effect.

    真空情况下,利用溴甲烷、环氧乙烷杀虫、灭菌是一种安全、快速、有效的技术措施。为了使此技术广泛应用到农林种子、苗木、卫生防疫以及文史资料诸方面杀虫灭菌,试制成功一台容积工立方米的PCV-1000程序控制真空熏蒸机,并进一步进行溴甲烷、环氧乙烷杀虫灭菌效果及其熏蒸后残余毒气处理方法的研究。溴甲烷75—90克/立方米处理2小时,环氧乙烷90—120克/立方米处理3小时,可杀死各种形式的包装内的谷斑皮蠹和花斑皮蠹幼虫,赤拟谷盗和锈扁谷盗成虫以及玉米象和绿豆象各虫态等害虫。环氧乙烷灭菌能力较强,对动物炭疽菌、4001芽孢杆菌500克/立方米处理5小时或300克/立方米处理12小时,灭菌效果100%。溴甲烷和环氧乙烷混合使用对棉花枯萎病菌效果良好,对棉籽发芽率影响不大。熏蒸后残余毒气处理,用5%氢氧化钠酒精液吸收溴甲烷,破坏率可达96%以上。环氧乙烷用自来水淋洗法,水合分解率可达98%以上。

    An investigation was made on soil and water conservation work in the mountainous areas in part of communes and brigades in the five counties of Chaoyang District. Experiences were derived from a large amount of data. They can be summarized in three combinations and five changes, that is, combining soil and water conservation with water conservancy projects, biological measures with engineering projects and large projects with medium and small ones so as to implement step by step the transformation...

    An investigation was made on soil and water conservation work in the mountainous areas in part of communes and brigades in the five counties of Chaoyang District. Experiences were derived from a large amount of data. They can be summarized in three combinations and five changes, that is, combining soil and water conservation with water conservancy projects, biological measures with engineering projects and large projects with medium and small ones so as to implement step by step the transformation of mountainous area into gardens and forests, the terracing of land in gullies and that on hillsides, the irrigation of cultivated land and the formation of a communication line network. This is the only way which will lead the population in Chaoyang District to prosperity.

    本文对朝阳地区五个县的部分社队以水土保持为中心的山区建设进行了重点调查研究,从大量的丰富的实际资料中总结出“三结合五化”经验,即坚持水土保持与水利建设相结合,生物措施与工程措施相结合,大巾小工程相结合,以逐步实现山区园林化、沟壑川台化,坡地梯田化、耕地灌溉化和交通路网化。这也是朝阳地区广大人民由穷变富的必经之路。

    The semi-arid area of northwestern Liaoning province is located in119°-123°30′N., 40°30′-43°N.. Average annual rainfall is 400-500mm from northwestern part to southeastern part. There were 300 mmmore or less rainfall per year only from 1980-1982. Total annualevaporation is fourfold than annual rainfall. Average annual tempera-ture is 7-9°c.≥10°c temperature is 3200°-3600°C. The crop growingperiod is 130-160 days. The soil types are Yellow-white soil, Brownsoil and Sandy soil. There are 17 million mu of farm...

    The semi-arid area of northwestern Liaoning province is located in119°-123°30′N., 40°30′-43°N.. Average annual rainfall is 400-500mm from northwestern part to southeastern part. There were 300 mmmore or less rainfall per year only from 1980-1982. Total annualevaporation is fourfold than annual rainfall. Average annual tempera-ture is 7-9°c.≥10°c temperature is 3200°-3600°C. The crop growingperiod is 130-160 days. The soil types are Yellow-white soil, Brownsoil and Sandy soil. There are 17 million mu of farm land, (1.13 mil-lion hecters), which are 70% in hillside and 30% in the plain.Based on its natural environment, ecolegical conditions. existingproductive capacity of agriculture and long-term practical experience,some ways of reforming farming system were discussed.1. Controlling water and soll erosion through afforestation andgrass-growing is a reliable base of farming system reform. Yield per unitarea and soil organic matter content have double where afforastation waspersisted in and a proper ratio between crop and grass was kept.2. It is essential to establish a soil tillage system for drought re-sistant and controlling wind and water erosion mainly changing frequenttillage to minimum tillage, harrowing and rolling during winter andearly spring to preserve soil noisture.3. It is an effective way of readjusting crop proportion in dry far-ming area to stabilize and increase yield and income by expanding theareas of drought-resistant crops such as millet, sunflower, sweet potato,etc. and increasing apprepriately the areas of fibre crops in irrigatedland.4. Dry land irrigation is a favorable measure to increase yield. Butthe water resource is unsufficient in this area. Irrigation during winterand early spring, storing up the soil water with tillage and utilizing itduring stress season, is an effective measure to overcome spring drought.

    辽宁省西北部半干旱地区是广阔的欧亚中纬度干旱、半干旱地区的东缘南段。总面积约为2.81万平方公里,占全省总土地面积的20%左右,共有耕地1700万亩;平均每人占有耕地3~10亩以上,是该省人少地多的地区。 全区地势西高东低。年平均气温在7~9℃之间,年≥10℃积温在3200℃~3600℃之间,无霜期130~170天,年日照时数2400~3000小时,太阳年辐射量在130大卡/平方厘米·年左右。年降水量在500毫米左右。作者分析了七个县20多年的年降水量与粮食亩产量的关系,指出:年降水量不足400毫米,则亩产量明显下降;当年降水量小于300毫米时,则严重减产。朝阳县29年的资料,年降水量小于400毫米的共有7年,其亩产量都在180斤以下。 本区耕作制度改革的主要途径是: 1、造林种草,防止水土流失;改广种薄收为精耕细种、少种,高产多收。 2、确立防旱、防风蚀、防水蚀的“三防”土壤耕作制。 3、扩大抗旱作物、增种经济作物,调整作物布局,作到稳中求高,增产增收。 4、发展灌溉是提高产量的有效途径。

     
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