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alfalfa
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  苜蓿
    Effect of Alfalfa on the Soil Eco Environment.
    苜蓿对土壤生态环境的影响
短句来源
    Ecological effect of compound pollution of heavy metals in soil-plant system Ⅰ.Effect on crop, soil microorganism, alfalfa and tree.
    重金属复合污染对土壤植物系统的生态效应Ⅰ.对作物、微生物、苜蓿、树木的影响
短句来源
    The total organic carbon contents in the soil at 0~20 cm depth of maize field and locust nursery were increased by 32 %~68 % and 27 %~136 %,respectively,and alfalfa field by 48 % only at 0~10 cm depth,compared with uncultivated desert soil as control.
    结果表明,与未开垦荒地相比较,玉米地和刺槐苗圃地土壤总有机碳含量在0-20 cm土层深度分别增加了32%-68%和27%-136%,但是苜蓿地仅在0-10 cm土层增加了48%.
短句来源
    Particulate organic carbon content in 0~20 cm soil layer of maize field was increased by 143 %~167 %,and alfalfa field and and locust nursery in 0~10 cm soil layer by 217 %~550 %,respectively.
    在0-20 cm土层深度,玉米地颗粒有机碳含量增加了143%-167%,而苜蓿地和刺槐苗圃地则仅在0-10 cm土层分别增加了217%和550%.
短句来源
    The soil total nitrogen contents at 0~30 cm depth of maize field and locust nursery were increased by 61 % and 64 %,respectively,but there was no change in soil total nitrogen contents in soil of alfalfa field.
    玉米地和刺槐苗圃地0-30 cm土层土壤全氮含量分别增加了61%和64%,而苜蓿地全氮含量变化不大;
短句来源
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  紫花苜蓿
    Study on Benefits of Alfalfa Conservating Soil and Water
    紫花苜蓿保持水土效益的研究
短句来源
    The Comprehensive Evaluation of Drought Tolerance for Alfalfa in Gansu
    甘肃省紫花苜蓿地方类型抗旱性的综合评判
短句来源
    Studies on Dynamic Change of Soil Water to Different Alfalfa Varieties
    不同紫花苜蓿品种土壤水分动态变化研究
短句来源
    A study on estimation of water utilization in field of alfalfa in southeast Gansu
    甘肃陇东南紫花苜蓿土壤水分利用程度的评估研究
短句来源
    grasslands (2-, 3-, 7-, 13-, 19-, 23-year alfalfa grassland), 23-year alfalfa grassland is a sloping field on a hillside, and the other treatments are all flat fields in a valley.
    在不同种植年限的紫花苜蓿(Medicago sativa L.)人工草地(生长2年、3年、7年、13年、19年、23年)中,除23年生苜蓿草地为坡地外,其它均为平坦的川地。
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  “alfalfa”译为未确定词的双语例句
    About 80% transgenic alfalfa plants were found containing FH3 gene by PCR and Southern blotting.
    转基因首稽经Southern blot表明:约80%转基因首蓓株基因组中可检测到FH3基因;
短句来源
    Among these transgenic alfalfa plants, 5-10% plants were confirmed expressing FH3 recombinant protein, which molecular weight was about 22KD through SDS-PAGE.
    提取转基因首稽植株总蛋白质,SDS一PAGE结果显示转基因首稽株表达了重组抗原蛋白(分子量~22KD);
短句来源
    To prove the capability of XJ96077 to nodulate both soybean and alfalfa, constitutively expressed green fluorescence protein gene gfp (carried by pMP2444) was introduced to XJ96077, and the recombinant strain XJ96077(G) was obtained.
    应用绿色荧光蛋白基因(gfp)标记XJ96077,得到重组菌株XJ96077(G)。
短句来源
    The sand transporting quantity of the plough land was 13.280 g/m~2, that of grassland was 5.308 g/m~2, that of woodland was 4.949 g/m~2.The water usage of the plough land of naked oats was the most, alfalfa and young trees's were fewer, the grassland's was the least.
    观测期内不同植被各高度输沙总量,耕翻地最多为13.280g/m~2,草地次之为5.308g/m~2,林地最低为4.949g/m~2。
短句来源
    The sand transporting quantity of the plough land was 13.280 g/m2, that of grassland was 5.308 g/m2, that of woodland was 4.949 g/m2.The water usage of the plough land of naked oats was the most, alfalfa and young trees's were fewer, grassland's was the least.
    观测期内不同植被0~200cm输沙总量,耕翻地最多为13.280g/m~2,草地次之为5.308g/m~2,林地最低为4.949g/m~2。
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  alfalfa
Isolation and Characterization of Holocellulose from Alfalfa
      
Holocellulose isolated from the aerial parts of alfalfa (Medicago sativa) contains a polysaccharide complex of cellulose and hemicelluloses, the major structural components of cell walls.
      
Studies of the Efficacy of Alfalfa and Reed in the Phytoremediation of Hydrocarbon-Polluted Soil
      
Ditch reed (Phragmites australis) and alfalfa (Medicago sativa) markedly intensified processes of pollutant destruction, the effect being particularly pronounced in the case of polycyclic aromatic hydrocarbons.
      
The rhizosphere microbial consortium of alfalfa was less susceptible to effects of pollutants than that of reed.
      
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This paper shows that there are a lot of entomocenose in the forage crop field, some of which can be considered as natural enemies. The Kinds of natural enemies and theic ecological characteristics in a large area of alfalfa, sainfoin and indroduced forage field (26 kinds of grasses and legumes) were studied in Hexi Corridor of Gansu province from 1981 to 1985. The results indicated that there are 62 species of important natural enemies, belonging to 25 families, 8 orders.

1981—1985年,在甘肃河西地区,对大面积栽培的苜蓿、红豆草和引种试验田(豆科和禾本科牧草共计26种)的天敌昆虫种类及其生态特性进行了调查研究。经初步鉴定,重要的天敌昆虫种类有62种,隶属于8目25科。

Li Yizhi (1882-1938) was a famous expert in water conservancy of Modern China. His contributions to the cause of water conservancy on Yellow River is well known. His idea towards harnessing Yellow River is of high reputation, such as the focus should be made throughout the upper, middle and lower reaches simultaneously, safety on lower reaches would not be obtained unless controlling the middle reaches, the hazard never eliminated without reducing sediment. However there is few study on his idea in respect of...

Li Yizhi (1882-1938) was a famous expert in water conservancy of Modern China. His contributions to the cause of water conservancy on Yellow River is well known. His idea towards harnessing Yellow River is of high reputation, such as the focus should be made throughout the upper, middle and lower reaches simultaneously, safety on lower reaches would not be obtained unless controlling the middle reaches, the hazard never eliminated without reducing sediment. However there is few study on his idea in respect of soil conservation. He worked out a comprehensive concept including widely extension of terraced field, ditch system to restore runoff, afforestation, planting alfalfa, building siH - arresters along gullies and irrigation by using high sediment laden flood water. A lot of facts citied in this paper shows Prof. Li is a great expert in soil conservation in Modern China.

李仪祉我国近代著名的水利专家。他热爱祖国,一生为祖国的“水利事业奔走呼号,艰苦奋斗,鞠躬尽瘁”。他对治理黄河有独到的见解,主张上中下游并重,提出了中游不治、下游难安,泥沙未减、本病未除的观点。李先生在水利事业上的贡献,水利界早有定论。然而,对于李光生在水土保持方面的创见,却尚未开展深入的研究。在水土保持工作上,李先生积极倡导、推行阶田制和沟洫制主张培植森林,广种苜蓿,筑堰拦泥,引洪淤灌,并提出了综合治理的观点和详尽的技术方案。本文以大量的事实,证明了李先生是一位杰出的水土保持专家,是我国近代水土保持工作的先驱。

This paper discusses the measures of rational land use in the Loess Plateau of Northern Shaanxi Province. The following measures and recommendations are suggested. Adjusting land use. The key issue is that current land use is not based on land suitability in the study area.Emphasis.must be given to changing land use according to land suitability and local social and economic conditions. Because of the erosion hazard, land should be used for farmland when slopes exceed 15°. The steep cultivated slopes must be...

This paper discusses the measures of rational land use in the Loess Plateau of Northern Shaanxi Province. The following measures and recommendations are suggested. Adjusting land use. The key issue is that current land use is not based on land suitability in the study area.Emphasis.must be given to changing land use according to land suitability and local social and economic conditions. Because of the erosion hazard, land should be used for farmland when slopes exceed 15°. The steep cultivated slopes must be abandoned in favour of sown grass and planted trees. Engineering techniques in arable lands. In order to reduce soil erosion and water loss, farmland should include irrigated lands, flood-water sited lands,level terrace fields, check-dam lands, and strip lands in accordance with the regimes of water resources and physical conditions. Check dam need to be constructed along gully beds to retain flood runoff and sediment. Building terraced fields is also a popular way to conserve soil and water. Terraces provide protection from erosion heavy rainfall of up to 40-50mm/24 hours. At the same time, in the terraced fields the output of farm crops for each hectare is usually able that of unterraced sloping lands. Afforestation and sowing grass. Afforestation and sowing grass are major measures to conserve water and soil on the Loess Plateau. Forest should be planted in the mountains and gullies, and grasses and bushes on the slopes. The main kinds of tree and herb are: Caragana sp,locust, poplar, Chinese pine, jujube, pear, apple, alfalfa, sweet clover and Astragalus sp. Grasses and shrubs should be planted first follwoed by an increase in the forest cover. The combination of grass, bushes and trees is the most effective measure to conserve soil and water. Comprehensive management in the small catchment. The problems concerning erosion of hills, rivers, farmland, forests,grassland and roads should be tackled in a comprehensive way. Therefore, The above measures should be implemented in small catchments. Measures taken on the slopes and in the gullies should be coordinated; engineering and vegetative means should be resorted to at the same time; work should be done both to draw benefits and to eliminate hazards. Strengthening land management. We must treasure every inch of land and use it rationally. There is need strictly to implement the land management laws and forestry laws, to ban any excessive timber logging and fuelwood cutting, and to close hillsides and mountains to facilitate afforestation. There are now strict edicts forbidding conversion of forests and grasslands into cropfields; all planned reclamations of land should be carefully appraised and take the environment consequences into account. To encourage afforestation and sowing grass, the state should provide funds for farmers. Thus, the steeply sloping farmlands could be converted into grasslands or forests, decreasing the loss of water and soil erorsion and improving the ecological environment.

本文在土地评价研究的基础上,针对土地利用存在的问题,提出了陕北黄土高原土地合理利用的方向和措施:一是按照土地的适宜性,调整农林牧用地结构,分区建立优化土地利用结构模式;二是造林种草,增加植被,改善生态环境;三是建设基本农田,培肥地力,实现粮食自给;四是小流域综合治理,控制水土流失;五是加强土地管理。

 
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