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cotton
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  棉花
    Knowledge Model-Based Decesion Support System for Cotton Management
    基于知识模型的棉花管理决策支持系统的研究
短句来源
    Study on Soil Effective Boron and Spraying Boron to Cotton Field
    土壤有效硼与棉花施硼的研究
短句来源
    The Design of an Expert System for Cotton Crop Management
    棉花管理专家系统的设计
短句来源
    ELEMENTARY STUDY ON COTTON NUTRITIONAL CHARACTERISTICS OF PURPLE SOILS IN SICHUAN
    影响四川棉花产量和品质的土壤障碍因子研究——Ⅲ 四川紫色土棉花营养特性初步研究
短句来源
    Grey System Forecast of Cotton Yield and Calamity Year in Henan Province
    河南省棉花产量的灰色预测及灾变年份预报
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    Economic and Farmers' Health Impacts of Bt Cotton in China
    我国采用Bt抗虫的经济和健康影响
短句来源
    STUDIES ON THE BALANCE OF SOIL ORGANIC MATTER IN SUMMER COTTON FIELD
    麦套短季田土壤有机质平衡研究
短句来源
    STUDY ON CHARACTER VARIATION INDUCED BY INTRODUCING EXOGENOUS DNA INTO UPLAND COTTON WITH ION IMPLANTATION
    离子注入法导入外源DNA引起陆地性状变异的研究
短句来源
    Discontinuing the Tendency of Ascendent Fertilier Imput──Another Exposition on the Principle of High Yield Fertilizer Application in Mulch Farming Cotton Field
    肥料投入攀升之风不应再长──再论地膜高产施肥原理
短句来源
    Influence of Fertilization and Environmental Temperature on the Resistance of Bt Transgenic Cotton to Cotton Bollworm
    施肥量和环境温度对转Bt基因抗虫性的影响
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  “cotton”译为未确定词的双语例句
    A STUDY ON THE NITROGEN DYNAMICS WITHIN THE ECOSYSTEM OF A COTTON FIELD BY USING ISOTOPE "N
    应用~(15)N研究棉田生态系统中氮素动态
短句来源
    ENERGY DYNAMICS AND ECOLOGICAL EFFICIENCY OF COTTON APHID (APHIS GOSSYPH )POPULATION IN DIFFERENT COTTON AGROECOSYSTEMS
    不同类型棉田生态系统中棉蚜种群能量动态及其生态学效率分析
短句来源
    Here we analyzed effects of the correlation between the productivity and diversity of insect pests community and natural enemies community associated with planting date and intercropping in 4 types of cotton fields from Raoyang County, Hebei Province in China.
    本文以河北省饶阳县4种不同播种时间和套作的棉田生态系统为研究对象,测定了各生态系统中作物、害虫群落、天敌群落的生产力与同化力,分析了不同生态系统中害虫、天敌群落多样性及其生产力之间的相关性,并探讨了播种日期、套作对不同群落内及群落间相关性的影响。
    Negative but no significant correlation were found between the diversity indices of energy flow, number diversity and lower trophic productivity in cotton-insect pests and insect pests-predators community for most intercropped cotton fields.
    但是,棉田初级生产力和害虫群落生产力与上一营养层群落的数量多样性指数、能流多样性指数在几乎所有棉田中却呈现负相关,且相关性不显著。 我们的试验结果清楚地表明,在不同棉田生态系统中害虫群落和捕食性天敌群落的多样性指数(数量多样性指数和能流多样性指数)与其群落的生产力以及下一营养层的生产力均为相关不显著。
    Study on Genetic Differentiation of Verticillium dahliaeZ Isolates from Cotton Areas of Hebei
    河北省棉区黄萎病菌系基于RAPD的遗传分化研究
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  cotton
Enzymatic hydrolysis of neutral fat of cotton oil soap stock with a nonspecific lipase produced byOospora lactis F-500 was designed.
      
Utilization of cotton oil soap stock as the only source of carbon during cultivation of the fungus was studied.
      
The rate of hydrolysis of soap stock fat strongly depended on the way of biological conversion of cotton oil soap stock.
      
The resulting mixed cultures utilized cellulose, cellobiose, glucose, maize residue, cotton, and flax boon producing ethanol (up to 0.9 g/l) and acetic acid (up to 0.8 g/l).
      
Use of the Fungus Panus tigrinus in the Manufacture of Pressed Materials from Cotton Plant Waste
      
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The present paper reports studies on the relative rate of decomposition of nine different oil cake-meals [soybean, peanut, sesame, rape seed, cotton seed(with and without hull), chinese tallow seed (with and without hull)]. In the course of decomposition of the different oil cake-meals, freguent measurement were made of the quantity of evolved CO_2 gas, and amount of the NH_4~+, NO_3~-, and NO_2~- nitrogen formed at the given intervals of the day. These measurement served as indices of the intensity of...

The present paper reports studies on the relative rate of decomposition of nine different oil cake-meals [soybean, peanut, sesame, rape seed, cotton seed(with and without hull), chinese tallow seed (with and without hull)]. In the course of decomposition of the different oil cake-meals, freguent measurement were made of the quantity of evolved CO_2 gas, and amount of the NH_4~+, NO_3~-, and NO_2~- nitrogen formed at the given intervals of the day. These measurement served as indices of the intensity of decomposition and rate of ammonification and nitrification of the oil cake-meals that may be occur in the soil. These studies were performed in the laboratory, under room temperature condition of the summer season. All cakes were ground into meals to such particle size as to pass through a 20-mesh sieve. The cake-meals were separately mixed with cultivation soil in the proportion of one part of cake-meal to hundred parts by weight of soil. The soil used was of alluvial origin, low in organic matter and somewhat sandy in texture. It was found that decomposition of the cake-meals began soon after their application to the soil. The daily evolution of CO_2 reached its maximum for about one week. Immediately after that, the daily evolution of CO_2 declined rapidly to a such lower level and attained a rather steady declining rate after about two weeks. The trends were common in character irrespective of the kind of the cake-meals. Among the organic constituents of tile cake-meals that underwent into decomposition in the early days, nitrogeneous organic compou ads seemed to be of major importance. The production of ammonium compounds as a result of ammonification followed a trend similar to that shown by the evolution of CO_2. The maximum rate of ammonification was noticed sometime before the evolution of Co_2 had reached a maximum. The positive correlation existing between the total nitrogen content of the oil cakes and the rate of ammonification was evident. Other factors, however seemed to be also affecting the status of transformation of Nitrogen compounds. Nitrate compounds began to appear soon after ammonification had proceeded to an appreciable degree. In the course of decomposition their accumulation in the soil increased steadily with the time. Small amounts of nitrites were found under the experiment conditions which were characterized by low moisture content (25%) of the soil and meal mixtures. From the quantity of the total available nitrogen accumulated at different intervals in the course of decomposition as in the case here given, it seemed that some nitrogen might be lost through volatilization of ammonium compounds, since the soil was alkaline in reaction (the soil here used had a PH value of 7.2) Soaking the cake meals with water, lime-water, or straw-ash extract as sometimes practiced by the local farmers in some districts in Chekiang province brought about the effect of hastening ammonification and nitrification processes. But, gain in readiness of availability of the meals by this hastening effect might not compensate for the loss in total amount of available nitrogen formed. The loss was particularly evident when the cake-meals were pretreated with lime-water or straw-ash extract. It is believed that the alkaline reaction of the treated cake-meals accounts for this loss. The relative readiness of decomposition of the different oil cake-meals followed in descending order: soybean, sesame, peanut, Cotton seed (without hulls)>Cotton seed (with hulls), rape seed>Chinese tallow seed (with and without bulls). Similarly, the relative total amount of available nitrogen (including ammonium and nitrate nitrogen) formed during decomposition shows in the following order: soybean, peanut, sesame, chiness tallow seed(without hulls)>Cotton seed (with and without hulls)>rape seeds>Chiness tallow seed (with hlls).

研究了浙江省施用的九种主要餅肥在土壤中分解的情况,各种餅肥都經磨碎,并通过20孔篩。实驗証明,在夏天的温度下,餅肥施入土壤后即迅速分解,它的分解最盛时期是在一星期左右,此后即迅速下降,到二星期后,即漸趋穩定。餅肥施入土壤后,铵态氮的大量發生是在一星期以內,此后即迅速降低,轉化成硝酸态氮。硝酸态氮在一星期到二星期的时間内开始大量發生,到二星期后就漸趋穩定。土壤中有效态氮总量在各个形态轉化的过程中,有顯著的減少趋势。餅肥在施入土壤前用石灰、草灰或水处理一星期,可提早土壤中有效氮的發生,其中單用水处理的效果尤其好。实驗証明,用石灰或草灰处理餅肥,使有效态氮大量損失,而用水处理則沒有这种情况。在本实驗的条件下,各种餅肥的分解速率依次为:豆餅、芝麻餅、花生餅、棉仁餅>棉籽餅、生菜餅、熟菜餅>桕餅、青餅。各种餅肥中氮素化合物转化后所產生的有效态氮总量依次为:豆餅、花生餅、芝麻餅、青餅>棉仁餅、生菜餅、棉籽餅>熟菜餅>桕餅。

A kind of degleyed swampy paddy soil has been developed during the changeof submerged paddy fields with a single crop of rice to the ordinary doublecropping system of rice and wheat in the“Lower River Basin”in North Jiang-su since the founding of new China.A series of field observations,experiments and laboratory researches re-vealed that during the development of the degleyed swampy paddy soil the ac-companying change in the soil properties underwent three stages.In the firststage a hard cloddy structure was...

A kind of degleyed swampy paddy soil has been developed during the changeof submerged paddy fields with a single crop of rice to the ordinary doublecropping system of rice and wheat in the“Lower River Basin”in North Jiang-su since the founding of new China.A series of field observations,experiments and laboratory researches re-vealed that during the development of the degleyed swampy paddy soil the ac-companying change in the soil properties underwent three stages.In the firststage a hard cloddy structure was formed in the surface soil and the availablephosphorus in the soil was strongly fixed.In the second stage the top soil be-came structureless and dispersed with high tenacity for water,being cooland too wet for winter crops to grow well.In the third stage,due to the pre-cipitation and accumulation of ferric oxide and humus,there formed a very com-pact prismatic-columnar structure below the plow layer,being liable to losewater and plant nutrients.The living roots could not extend into such hardcompacted layer to absorb nutrients for plant growth.The effective measures to ameliorate the above unfavorable conditions are asfollows:(1)Drain off the surface water,plow up the soil and dry it thoroughly inthe sun.Remoisten the soil by a quick flooding of the field in order to turn theclods into friable granules.(2)Adopt a rotation of rice-wheat-cotton to improvethe soil structure.(3)Add phosphorus fertilizer or grow rapes or green manurecrops that can vigorously absorb phosphorus from the soil.(4)Use silty rivermud as manure to change gradually the clayey properties of the soil concerned.

江苏省里下河地区在—熟沤田改稻麦两熟田的改制中发生一种脱沼泽型水稻土。一系列野外调查,田间试验和室內研究的结果示明,脱沼泽型水稻土发生过程中土壤性状的变化包括三个阶段:第一阶段中表土产生浸水不化的块状结构和土壤有效磷的强烈固定,第二阶段中亚表土变为无结构而粘滞,土性很冷而过湿,使冬作生长不良,第三阶段中耕作层下由于土体的急剧收缩和胶结而产生极紧实的棱柱状结构,漏水漏肥,作物根不能穿入土体以吸收养份。改善以上恶劣性状的有效措施是:(1)排去田面积水、耕翻土壤、在阳光中充分晒干后迅速窨水化垡以造成疏松的团粒;(2)采用稻—麦—棉轮作,加速土壤脱沼泽,以消除土壤中、后期出现的不良结构;(3)施磷肥或种吸收土中磷素能力强的麻、油莱或其它绿肥作物;(4)掺入粉砂性河泥以逐渐改变粘性土壤的质地。

Aiming at the right use of boron fertilizer in Rudong County, Jiangsu Province, a number of soil samples have been tested. The analytic data affirmed that the soils of this county fall into the category of boron-deficiency with quickly available boron contents of 0—20 cm depth only 0.401±0.186ppm.The data also showed that the quickly available boron contents of all soils varied greatly with regions, and their differences among soil types have reached 5% significant level. It is preferable to divide the soils...

Aiming at the right use of boron fertilizer in Rudong County, Jiangsu Province, a number of soil samples have been tested. The analytic data affirmed that the soils of this county fall into the category of boron-deficiency with quickly available boron contents of 0—20 cm depth only 0.401±0.186ppm.The data also showed that the quickly available boron contents of all soils varied greatly with regions, and their differences among soil types have reached 5% significant level. It is preferable to divide the soils of the whole county into three groups, i.e. potentially boron-deficient alluvial-salty soil (cotton area), moderately boron-deficient grey-alluvial soil and strongly borondeficient paddy soil.The disparities in available boron contents are due to the differences in soil parent materials, the length of its cultivation after reclamation, and the irrigation and drainage, among which the irrigation-drainage practice is the most active factor. Based on this research findings, we are aware that a great concern should be paid to the shortage of boron fertility in many localities along the sea coast in Huai-Nan region of Jiangsu Province.

为了明确如东县土壤有效硼含量丰缺的状况,以指导硼肥的施用,对该县土壤有效硼作了分析研究。通过分析测定,全县土壤(0—20cm表土)有效硼平均含量(x±s)为0.401±0.186ppm,属缺硼的范围。该县土壤有效硼含量存在着地域分异现象,按各土壤类型之间有效硼平均量的差异达0.05显著水平。全县可分为潮盐土棉花潜在缺硼区,灰湖土中度缺硼区和水稻土严重缺硼区。造成各区有效硼含量不同的原因有成土母质类型、开垦利用时间和灌溉排水状况,其中灌溉排水是最活跃的因素。根据对如东县有效硼的研究,可以认为江苏省淮南沿海很多地方应注意土壤硼素供给不足的问题。

 
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