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land
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  土地
    The Effects of Agricultural Land Use on Biodiversity and Change of Soil Organic Carbon in North China Plain
    华北平原农业土地利用对生物多样性和土壤有机碳变化的影响研究
短句来源
    The Decision-Tree Method for Extracting Changing Information of Land Use/Cover Based on Remote Sensing
    遥感土地利用/土地覆盖变化信息提取的决策树方法
短句来源
    Study on Regional Land Use Change and Its Analytical Methodology
    区域土地利用变化及其分析方法研究
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    Dynamic Monitoring of Land Utilization Level in Remote Sensing Technology
    土地利用水平的遥感动态监测
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    STUDY ON LAND PRODUCTIVE POTENTIALITIES IN KARST MOUNTAINOUS AREAS
    喀斯特山地土地生产潜力研究
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    APPLICATION OF EXPERIMENTAL ARRANGEMENT SCHEME OF EVENNESS DESIGN IN FERTILIZER TEST ON NURSERY LAND
    均匀设计试验布点方案在苗圃土壤施肥研究中应用初探
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    Study on the Impact of Hillslope Land Development in Taipei City on Hydro-environment in the Lower Reaches
    台北市山坡之开发特性与其对下游水文环境冲击之研究
短句来源
    Delineation of Potential Landslide Regions on Hillslope Land of Hsing-Yi District in Taipei City
    台北市信义区山坡潜在崩坍区划定之研究
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    Results showed that sediment yielded from slope chiefly come from arable land and bare land located at slope,and the quantity of sediment yielded from arable land located at the slope above 25°accounted for about 50% of the total sediment yielded from slope.
    结果表明,当坡面流失的泥沙主要来源于坡耕和裸,25°以上陡坡耕侵蚀的泥沙量,约占坡面产沙总量的50%。
短句来源
    Land cover types had significant effects on sediment yield of slope. At the same time,the amount of sediment could be decreased 71.05%-95.58% if the forest cover rate reached 70%-80%.
    土覆被状况对于泥沙的产生有重要影响,同等条件下,若林覆被率达到70%~80%,则能够减少71.05%~95.58%的泥沙产生量。
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  耕地
    A Design and Application of Systemic Cultivated Land Quality Evaluation System
    系统化耕地质量评价体系的构建与应用
短句来源
    Impact of Long-term Fertilization on Crop Yield and Aasorbing N. P of Crop in Slope Land
    坡耕地长期施肥对作物产量及吸N、P量的影响
短句来源
    Influence of Soil Organic Matters on Soil Erosion and Crop Yield of Cultivated Slope Land
    土壤有机质对坡耕地土壤侵蚀及作物产量的影响
短句来源
    Results showed that sediment yielded from slope chiefly come from arable land and bare land located at slope,and the quantity of sediment yielded from arable land located at the slope above 25°accounted for about 50% of the total sediment yielded from slope.
    结果表明,当地坡面流失的泥沙主要来源于坡耕地和裸地,25°以上陡坡耕地侵蚀的泥沙量,约占坡面产沙总量的50%。
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    The results showed that contents of Olsen-P in 0—20 and 60—100 cm of the crop land were higher than that in 20—60 cm.
    结果表明,耕地棕壤各施肥处理土壤剖面Olsen-P含量均表现为0—20 cm和60—100 cm大于20—60 cm;
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  “land”译为未确定词的双语例句
    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
短句来源
    Study on Land Surface Soil Moisture Retrieval Method with ERS Wind Scatterometer Over Tibetan Plateau
    基于ERS散射计数据的青藏高原土壤水分估算方法研究
短句来源
    An Analysis and a Look Ahead of Productive Potential of Agricultural Resources of Rainfed Land in Xingangmeng
    兴安盟旱地农业资源生产潜力的分析与展望
短句来源
    Analysis on the benefits and energy of planting model of four grain-vegetable crops a year in arid land at Dechang county
    德昌旱地粮菜四熟种植模式的效益和能量分析
短句来源
    Effect of Organic Materials on the Soil Organic Matter of the Eroded Inferior Land in South Fujian
    有机物料对闽南侵蚀劣地土壤有机质的影响
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  land
Our study indicates that the model can be applied to study the interaction between land surface processes and atmospheric boundary layers over various underlying surfaces and their regional climate effects.
      
Regularities of wind-erosion of different land-use types in Yongding River sandy land, Beijing
      
The threshold wind velocity of a number of variables was studied in four different land-use types: farm land, forestland, wild grassland and a flood plain in the Yongding River sandy land in Beijing.
      
The following conclusions were drawn: 1) The order of decreasing threshold of wind speed for sand displacement and surface roughness were forestland, wild grassland, farm land, sparse wild grassland and flood plain.
      
At a height of 0-20 cm, the height increased while the sediment discharge percent of sand flux decreased; there were significant differences in the sand flow formation under different land-use types.
      
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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...

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。

The result of an experiment continued for six years since 1979 hasshown that the combining measurement of reduced tillage and soilfertility cultivation with tilling replaced by harrowing and returning thestraw into field improves comprehensively the nutrient and waterconditions of soil, promotes the growth and development of crops andincreases the yields. In other words, it reduces the drive-in frequency ofthe machinery unit, lightens the destruction of soil in tillage layer bythe machine, improves the utilization...

The result of an experiment continued for six years since 1979 hasshown that the combining measurement of reduced tillage and soilfertility cultivation with tilling replaced by harrowing and returning thestraw into field improves comprehensively the nutrient and waterconditions of soil, promotes the growth and development of crops andincreases the yields. In other words, it reduces the drive-in frequency ofthe machinery unit, lightens the destruction of soil in tillage layer bythe machine, improves the utilization and production efficiency of farmimplements and lessens the fuel consume and operation cost. Only inthe tilling period in autumn before sowing wheat, replacing tilling byharrowing could reduce the fuel consume by 1.25 kg per mu in average incomparison with the traditional tillage, saving 32%. The operation costcould be reduced by 1.5 yuan per mu, saving 30%. The labor and timefor leveling the land after tilling could be saved at all. It seems to beadvantageous for sowing wheat in good time. The experimental results has presented a scheme of operationtechnology and necessary machinery for harrowing straw into field inthe integrated measurement of agricultural machinery and agronomy.

从1979年起,连续六年的试验研究证明:在小麦-玉米一年两熟种植方式中,采用以耙代耕和秸杆还田的“少耕”和“培肥”相结合的措施,较传統耕法可以减少机组的进地次数,减轻机具对耕层土壤的破坏,提高机具的利用率和生产率,降低能源消耗和作业成本,有效地提高经济效益。仅小麦播种前的土壤耕作阶段,以耙代耕与传統耕法相比较,平均每亩可减少燃油消耗1.25公斤,节約32%,可降低作业成本1.5元,节約30%,幷可节省全部耕地后平地所用人工,提高了工效,有利于小麦适时播种。试验结果提出了农机和农艺结合的耙秸还田机械化作业工艺和机具配套方案。

 
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