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growth     
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  生长
    Studies on Effects of Ecological Factors on Growth of Maize and Establishment of Climate Ecology Model and Appraisement System
    生态因素对玉米生长发育影响及气候生态模型与评价系统建立的研究
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    Construction of Dynamic Model and Analysis of Dynamic Character for Growth of Root and Shoot of Winter Wheat under Fluctuated Soil Water Conditions
    土壤水变动下冬小麦根、冠生长动态模型的建立及根、冠动态特性分析
短句来源
    Studies on the System Simulation for Potato Growth and Development
    马铃薯生长发育的动态模拟研究
短句来源
    The Combined Effects of Enhanced UV-B Irradiation and Doubled CO_2 on the Growth and Physioecology of Broad Bean and Wheat
    增强UV-B辐射和CO_2倍增的复合作用对蚕豆、小麦生长和生理生态的影响
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    A Process-Based Simulation Model for Cotton Growth and Development
    基于过程的棉花生长发育模拟模型
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  生长发育
    Studies on Effects of Ecological Factors on Growth of Maize and Establishment of Climate Ecology Model and Appraisement System
    生态因素对玉米生长发育影响及气候生态模型与评价系统建立的研究
短句来源
    Studies on the System Simulation for Potato Growth and Development
    马铃薯生长发育的动态模拟研究
短句来源
    A Process-Based Simulation Model for Cotton Growth and Development
    基于过程的棉花生长发育模拟模型
短句来源
    Effect and Its Causes of FACE on Growth and Development of Rice(Oryza Sativa L.)
    FACE对水稻生长发育的影响及其原因分析
短句来源
    Characteristics of Soil Temperature and Soil Water for Winter Wheat with No-tillage and Effect on Winter Wheat Growth in North China Plain
    华北平原免耕冬小麦田土壤水热特征及其对冬小麦生长发育影响研究
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  发育
    Studies on Effects of Ecological Factors on Growth of Maize and Establishment of Climate Ecology Model and Appraisement System
    生态因素对玉米生长发育影响及气候生态模型与评价系统建立的研究
短句来源
    Growth and Development and Expression Analysis of Genes in Different Upland Rice Roots under Water Deficit
    水分亏缺条件下旱稻根系发生发育及相关基因的表达分析
短句来源
    Studies on the System Simulation for Potato Growth and Development
    马铃薯生长发育的动态模拟研究
短句来源
    A Process-Based Simulation Model for Cotton Growth and Development
    基于过程的棉花生长发育模拟模型
短句来源
    Effect and Its Causes of FACE on Growth and Development of Rice(Oryza Sativa L.)
    FACE对水稻生长发育的影响及其原因分析
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  生育
    A Preliminary Genetic Study on Growth Period in F1 of Hybrid Rice of O. sativa subsp. Keng
    粳型杂交稻F_1生育期遗传规律的初步探讨
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    CORRELATION BETWEEN GROWTH PERIOD AND GROWTH HABIT AND YIELD IN F_2 GENERATION OF CROSSES BETWEEN SOYBEAN VARIETIES OF DIFFERENT GROWTH HABIT
    大豆不同结荚习性品种间杂交F_2世代生育期分离的趋势及不同结荚习性产量因素分析
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    Relationship Between the Meteorological Factors and the Growth Development,Yield and Quality of Tea Trees
    气象因子与茶树生育、产量、品质的关系
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    Research on Mathematical Models of Population Growth of Wheat
    小麦群体生育数学模型的研究
短句来源
    GENETIC ANALYSIS OF GROWTH PERIOD IN CHINESE SORGHUM
    高粱生育期的遗传分析
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  growth
Complexity of Homogeneous Spaces and Growth of Multiplicities
      
We give a representation-theoretic interpretation of this number as the exponent of growth for multiplicities of simple G-modules in the spaces of sections of homogeneous line bundles on G/H.
      
A necessary and sufficient geometric condition on the growth of the boundary of approximate tiles is reduced to a problem in Fourier analysis that is shown to have an elegant simple solution in dimension one.
      
We prove a Tauberian theorem of the form $\phi * g (x)\sim p(x)w(x)$ as $x \to \infty,$ where p(x) is a bounded periodic function and w(x) is a weighted function of power growth.
      
A complex Radon measure μ on ?n is said to be of at most exponential-quadratic growth if there exist positive constants C and α such that.
      
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For the study of the influence of oxidation-reduction conditions of thesoil on the growth of rice plant,pot experiments with three paddy soilswere conducted.The used soils included an acid paddy soil derived from quartiary red clay,an acid mountain paddy soil derived from granite anda neutral alluvial paddy soil.It was found that the application of green manure just before plantingin amount equivalent to 1% of the soil led to the retardation of growth ofrice as compared with the control treatment;dry...

For the study of the influence of oxidation-reduction conditions of thesoil on the growth of rice plant,pot experiments with three paddy soilswere conducted.The used soils included an acid paddy soil derived from quartiary red clay,an acid mountain paddy soil derived from granite anda neutral alluvial paddy soil.It was found that the application of green manure just before plantingin amount equivalent to 1% of the soil led to the retardation of growth ofrice as compared with the control treatment;dry weights of tops of riceplant amounted to only 78%,22% and 45% respectively of the controls forthe three soils.The difference in growth between the two treatments wasmost remarkable in the early period of plant growth.If the green manurehad been decomposed for one month in pot under semi-aerobic conditionsbefore planting,then the unfavorable effect could be noted only in theneutral alluvial paddy soil which contained a relatively larger amount oforganic matter.The improvement of oxidation-reduction conditions of the soil by inter-mittent applications of hydrogen peroxide and keeping the soil moisturecontent at a level of about 50—70% of water-holding capacity instead ofwaterlogging improved plant growth in soils with intensive reductionprocesses,the effect being most conspicuous in the acid mountain paddysoil where the unfavorable effect of green manure was also most remark-able.Measurements of oxidation-reduction potentials of leaves and stalks ofrice showed that the potentials were lowest when grown in pots with greenmanure,and were highest when hydrogen peroxide had been applied intothe soil.There was also a rough correlation between potentials determinedwith platinum electrode and with quinhydrone electrode,thus indicatingthat the redox systems of rice plant when grown under different oxidation-reduction conditions were not the same both expressed as intensity factor(redox potential)or as quantity factor(the change in redox potential ofquinhydrone).For the purpose of explaining the unfavorable effect of intensively re-duced conditions of the soil on the growth of rice plant,it was noted thatthere was a parallelism between the amounts of exchangeable and water-soluble ferrous iron of the soil and the magnitudes of unfavorable effect.Further pot experiment confirmed this supposition,in which the applicationof ferrous sulfate in amount of 50 mg.iron per 100 grams of soil alreadyled to the retardation of growth of rice.Conclusions were made that the unfavorable effect of reduction condi-tions of paddy soils on the growth of rice was due to the excessive amountof reduced materials,in which ferrous iron probably occuppied an out-standing position,and measures leading to the improvement of oxidation-reduction conditions of the soil could overcome this unfavorable effect.

1.土壤处于强烈的还原条件下时,对水稻生长有不良的影响,如果将土壤中的氧化还原条件改善,则对水稻的生长有益。2.土壤中的氧化还原情况,直接影响水稻体中的氧化还原电位,土壤电位低者,水稻中的电位也低。3.土壤中还原性物质的数量与水稻生长情况表现了明显的一致性,可见水稻在强烈还原条件下的生长不良,与还原性物质的过多有关。在还原性物质中,亚铁离子约占一半左右。4.试验结果指明,土壤中过多的亚铁离子,对水稻有毒害作用。

The scientific application of an ideal rotation system on paddy fields,has now been considered as a very important problem for ensuring highergrain yields and promoting soil fertility.As the commencing work onrotation researches,authors had selected to study the Rice-Cotton rotationsystem in Yuyao,Chekiang Province.A series of investigations and ex-periments were conducted in the year of 1955,in order to realize thevariations of soil chemical properties and rice growth on those rotatedpaddy fields.The...

The scientific application of an ideal rotation system on paddy fields,has now been considered as a very important problem for ensuring highergrain yields and promoting soil fertility.As the commencing work onrotation researches,authors had selected to study the Rice-Cotton rotationsystem in Yuyao,Chekiang Province.A series of investigations and ex-periments were conducted in the year of 1955,in order to realize thevariations of soil chemical properties and rice growth on those rotatedpaddy fields.The results obtained are summerized as follows:(1)During the period of Cotton rotation in paddy fields,the organiccontents in the soil tend to decrease,while the total exchangeable bases andavailable phosphorus show an apparant increase.By cultivating rice in suchfields,a reversible tendency appears,namely manifesting an increase ofsoil organic matter content and a decrease of both total exchangeable basesand available phosphorus contents.Besides,the formation of more am-monical nitrogen is found in the later case.(2)The Rice-Cotton rotation will assuredly increase the rate of ricegrowth as well as the yields of grains.Comparing with the unrotatedplot,paddy fields so rotated show an average increase of 9% in grainyeilds,as confirmed by field experiments.(3)In those rotated paddy fields,winter crop-green manure(Medicagodenticulata wild)grew vigorously and showed an increase of 70% in yields(based on fresh weight)as compared with unrotated paddy fields.(4)Rice-Cotton rotation may adjust the rate of the alternation of ac-cumulating and decomposing of soil organic matter,which we know willmarkedly promote soil fertility in paddy fields.Therefore,to save the ap-plication of manure and solve the shortage of fertilizers in grain produc-tion,the use of Rice-Cotton rotation system in certain district,is ofparamount importance at present time.

(1)稻田轮种棉花期间,土壤有机质含量有减低的趋势,但土壤代换性盐基总量及速效磷的合量均增高。轮种水稻期间,土壤有机质又有增加的趋向,而代换性盐基总量及速效磷则渐次减低。此外,土壤中铵态氮则有增多的趋势。(2)稻棉轮种能增强水稻的生长势,提高水稻的产量。根据对比试验及统计资料,一般比连种区增产9%左右。(3)稻田轮种棉花后,冬作绿肥生长良好, 鲜草产量比一般连种稻田增加70%以上。(4)在保证增产的前提下,轮种区的水稻基肥用量,一般可比连作稻区节省40%左右,而轮种区的绿肥产量又能增加,因此可自轮种田内割出60%的绿肥鲜草,作为其他稻田的基肥,而达到全面增产的目的,这在目前肥料普遍不足的情况下有其重要意义。

Chemical analysis of seperate plant organs of green manures at various stages of growth collected from representative districts of Central China showed that the accumulation of green mass and the absorption of nutrients chiefly occurred during the last 30 to 45 days before plowing-under.Astragalus sinicus,the principal leguminous green manure in central China,showed some correlation in P and K contents with soil fertility,whereas the nitrogen content remained practically constant regardless the nutritive...

Chemical analysis of seperate plant organs of green manures at various stages of growth collected from representative districts of Central China showed that the accumulation of green mass and the absorption of nutrients chiefly occurred during the last 30 to 45 days before plowing-under.Astragalus sinicus,the principal leguminous green manure in central China,showed some correlation in P and K contents with soil fertility,whereas the nitrogen content remained practically constant regardless the nutritive status of the soil.It was esti- mated that the nodular bacteria of Astragalus sinicus assimilated about 105 kg of nitrogen per hectare at the yield of 37,500 kg of green mass. Green-house experiments revealed that manure crops possessed a stronger power in assi- milating their phosphorus from rock phosphate and magnesium from serpentine as compared with winter wheat.Laboratory experiments with exciled root also demonstrated that the root systems of manure crops have a stronger absorption power,greater cation-exchange capacity,larger absorbing surface area and more intensive rate of respiration than that of the wheat.Among the tested manure crops,Raphanus sativus,a cruciferous plant widely planted on infertile soils,has been proved the best variety.

1.紫云英与苕子的绿色体一般以初花期前后或盛花期增长最快。紫云英的根系主要分布在0—10厘米,在5,000斤鲜草产量时,1平方尺内约有6克左右的干根。地上与地下部分的干物质比为6.5∶1,鲜重比为11∶1,目前一般对地下部分的产量估计似乎有些偏高。2.紫云英等含氮、磷、钾的百分率均随绿色体的增长而减低,紫云英在盛花期含 N2.7%,P_2O_5 0.65%,K_2O2.5%,CaO 1.6%,含氮量与土壤的肥沃程度没有明显的相关性,含磷量与含钾量则与土壤中磷钾含量成正相关。根部所含的养分一般均低于地上部分,叶子的氮、磷百分率远较茎等部位为高。苕子盛花期含 N 3.3%左右,其他成分大体与紫云英相近。萝卜菜在盛花期的含 N 量为1.7%,K_2O 量较高,一般是 N 与 P_2O_5的总和,含 CaO量恒多于紫云英,一般在2.0%以上。油菜的成分大体与萝卜菜相近。3.各种绿肥在一定生长时期中地上部分的阳离子总量大体为一常数。紫云英在盛花期的阳离子总量维持在110毫当量左右,萝卜菜的含量还更高。4.萝卜菜、紫云英、苕子与小麦等四种植物对蛇纹石都能利用,但对钾长石不能利用。磷灰石的施用对增产很显著,根据增产百分率的...

1.紫云英与苕子的绿色体一般以初花期前后或盛花期增长最快。紫云英的根系主要分布在0—10厘米,在5,000斤鲜草产量时,1平方尺内约有6克左右的干根。地上与地下部分的干物质比为6.5∶1,鲜重比为11∶1,目前一般对地下部分的产量估计似乎有些偏高。2.紫云英等含氮、磷、钾的百分率均随绿色体的增长而减低,紫云英在盛花期含 N2.7%,P_2O_5 0.65%,K_2O2.5%,CaO 1.6%,含氮量与土壤的肥沃程度没有明显的相关性,含磷量与含钾量则与土壤中磷钾含量成正相关。根部所含的养分一般均低于地上部分,叶子的氮、磷百分率远较茎等部位为高。苕子盛花期含 N 3.3%左右,其他成分大体与紫云英相近。萝卜菜在盛花期的含 N 量为1.7%,K_2O 量较高,一般是 N 与 P_2O_5的总和,含 CaO量恒多于紫云英,一般在2.0%以上。油菜的成分大体与萝卜菜相近。3.各种绿肥在一定生长时期中地上部分的阳离子总量大体为一常数。紫云英在盛花期的阳离子总量维持在110毫当量左右,萝卜菜的含量还更高。4.萝卜菜、紫云英、苕子与小麦等四种植物对蛇纹石都能利用,但对钾长石不能利用。磷灰石的施用对增产很显著,根据增产百分率的大小,可排列成如下的次序:紫云英>萝卜菜>苕子>小麦。在某种程度上反映植物对难溶性物质的利用能力的三个指标(根的阳离子交换量、根的吸收面积与根的呼吸强度),对于四种植物,其大小次序基本上与其对磷灰石的利用能力的排列次序相一致。因此从各方面来看,这几种绿肥的吸收养分的能力,都较象小麦这样的农作物为强。5.绿肥是一种成本低收效大的肥料。在紫云英鲜草产量5,000斤时,地上与地下部分所合的氮、磷、钾分别相当于硫酸铵105斤、过磷酸钙22.5斤、氯化钾36斤。假定其中的氮素有2/3是来自大气,则“天然工厂”制造了70斤左右的硫酸铵。中稻亩产600斤时所取走的氮素约相当于50斤硫酸铵,因此单就来自大气中的这一部分来讲,对中稻的供应也还是有余。从全国范围来看,凡是绿肥面积大的地区,也就是稻麦产量高而稳定的地区。目前各地绿肥的种植面积与产量都极不平衡,还有很大的潜力。

 
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