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planting     
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  种植
    Studies on Water Consumption Characteristics of Winter Wheat and Summer Maize under Different Planting Patterns
    不同种植模式下冬小麦夏玉米耗水特性研究
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    PLANTING DENSITY AND CROP YIELD——AN ANALYSIS OF QUANTITATIVE RELATIONSHIPS BETWEEN YIELD AND DENSITY
    种植密度和作物产量——产量和密度的数量关系及其分析(续)
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    Studies on the Increase of Grain weight of wheat under the High yield Conditions In Bunch planting
    在高产穴播种植方式下提高小麦粒重的研究
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    ECONOMIC BENEFITS OF DIFFERENT WAYS OF COTTON PLANTING
    棉花不同种植方式的增产效果和经济效益
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    Studies on the Planting Density of Tea
    茶树种植密度的研究
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  栽培
    Study on Cultivation System for High yield of Rice in Coldareas(Ⅱ)—The Seeding Rate of Rice and Its Planting Density
    寒冷地区水稻高产栽培体系的研究(2)——播种量及栽植密度模式的探讨
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    Studies on the Physiological Basis of the Way of Planting of High Yield,Top Quality at Low Expenditure of Wheat——Photosynthetic Characteristics
    小麦高产优质低耗栽培途径生理基础研究—光合特性
短句来源
    STUDIES ON CULTURAL TECHNIQUE OF NEW INDICA RICE VARIETY QIAN-YU 417 Ⅰ.Experiments of Planting Density in Different Ecological Areas
    中籼新品种黔育417栽培技术研究 Ⅰ.不同生态区密度试验
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    PRELIMINARY STUDY ON DIFFERENT PLANTING PATTERN OF SOYBEANS
    大豆不同栽培方式研究初报
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    A Study on the Main Calamitous Climate in Winter Wheat Production and the countermeasure of planting Technique in Zhumadian District
    驻马店地区小麦生产主要灾害气候及其栽培技术对策研究
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    COMPREHENSIVE IMPROVEMENT AND UTILIZATION OF CONVENTIONAL SPARSE PLANTING TEA GARDEN IN GUIZHOU
    贵州常规稀老茶园综合改造利用的意义和途径
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    Trial on Planting Density of Summer Planted Sugarcane“Fuyin 79—8”
    夏蔗“福引79—8”不同种密度试验
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    Effects of Different Planting Combination and Heterosis of Two Types of Forage Sorghum.
    不同配和收获方式对两种类型饲用高粱产量及杂种优势的影响
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    The Impact of The Different Densities of Transplants on Rice Growth,Development and Yield (Ⅰ)──Studies on The System of Thin Planting Cultivation Techniques in Rice among Cold Areas
    不同插秧密度对水稻生长发育及产量的影响(Ⅰ)──寒冷地区种稻低耗增效稀栽培技术体系的研究
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    STUDIES ON HIGH YIELD GROWTH MODEL AND PROMOTE OR CONTROL TECHNIQUE OF RICE IN SPACED PLANTING CULTIVATION ──Ⅰ. VEGETATION GROWTH MODEL OF YIELD ABOVE 9000KG/HA OF EARLY VARIETIES OF RICE
    水稻稀、超稀栽培高产生育模式及促控枝术的研究──Ⅰ.水稻早熟品种公顷9000公斤产量的营养生长模式
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  栽植
    Study on Cultivation System for High yield of Rice in Coldareas(Ⅱ)—The Seeding Rate of Rice and Its Planting Density
    寒冷地区水稻高产栽培体系的研究(2)——播种量及栽植密度模式的探讨
短句来源
    STUDY ON PLANTING METHODS OF HYBRID RICE
    杂交水稻栽植方式的研究
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    A STUDY OF FEED EFFICIENCY MULBERRY——Ⅰ.INFLUENCE OF DIFFERENT PLANTING DESNITIES AND FORMS TO INCREASING FEED EFFICIENCY OF MULBERRY
    桑饲料效率研究——Ⅰ不同栽植密度与栽植形式对提高桑饲料效率的影响
短句来源
    Study on Survival Ratio of the Planting of Chinese Alpine Rush
    龙须草栽植成活率的研究
短句来源
    Study on the Seedling-age and Planting Density in SRI
    水稻强化栽培的适宜秧龄和栽植密度研究
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  planting
The influence of woodland soil bulk density on the growth and distribution of fine root system of main planting tree species in the Weibei Loess Plateau was investigated by means of pot culture and field survey.
      
Besides, runoff and sediment produced in mixed planting of apple trees and crops were 16.14-fold and 2.96-fold than those of O.
      
Container stecklings are more likely to increase the planting survival rate.
      
Therefore, it is important to consider planting densities on the hillsides with slope gradients less than 10° for reconstructing vegetation.
      
To improve soil quality and maintain sustainable productivity, some measures, including planting mixed conifer with hardwood, preserving residues after harvest, and adopting scientific site preparation, should be taken.
      
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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 weights...

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 Kiangsu Affiliated Academy of the Chinese,Academy of Agricultural Sciences)Hybrid vigour in cotton has been reported by a number of workers.Most of them dealtwith interspecific hybrids.They were mostly marked with an increase in plant growth,especially in the F_1 crosses of American Upland × Sea-island and American Upland × Egyptiancotton.In order to study the possibility of producing an extra long fibre cotton in the Yang-tze basin and the Hwangho Plain by making use of hybrid vigour,the following problemswere...

(The Kiangsu Affiliated Academy of the Chinese,Academy of Agricultural Sciences)Hybrid vigour in cotton has been reported by a number of workers.Most of them dealtwith interspecific hybrids.They were mostly marked with an increase in plant growth,especially in the F_1 crosses of American Upland × Sea-island and American Upland × Egyptiancotton.In order to study the possibility of producing an extra long fibre cotton in the Yang-tze basin and the Hwangho Plain by making use of hybrid vigour,the following problemswere investigated at Nanking,Kiangsu during 1959-1962.(1)Combining ability between different interspecific crosses with special reference toyield,earliness and fibre qualities.(2)Morphological and physiological characters of economic importance in F_1 hybrids.(3)Performance of promising hybrids in field production.(4)Method of producing hybrid seeds with cheaper cost and less labour.Fifty-nine combinations were studied from 1960 to 1962,among which Pong-zai No.1(Upland cotton)×L.S.4923(Sea-island)was the best in yield and earliness.The averageyield of this F_1 hybrid in three years with 178 kg.of seed cotton or 53.7 kg.of lint cotton permow.As compared with the parents it was 94.35% of seed cotton or 82.2% of lint cotton ofthe yield of Delta-upland cotton and 187.17% of seed cotton or 172.74% of lint cotton of theyield of Sea-island L.S.4923.The fibre quality of F_1 hybrids approached Sea-island parent with a mean fibre length of40 m.m.,mean fibre fineness of 7000 meters per gram wt.,and single fibre strength of 4.5g.The methods and procedures for producing commercial hybrid cotton seed were as follows:(1)Hybrid F_0's seed was produced by hand emasculation and pollination which was ofvalue in areas abundant with hand-labor or adapted to transplanting for saving seeds up to4/5.(2)The female parent with recessive markers,was pollinated by hand without emascula-tion.In the thinning of the hybrid progeny all recessive plants were removed,leaving onlythe true F_1's.The recessive characters used for markers were virescent yellow foliage,redstem and hairy petiole of the seedling.The percentage of hybrid seed setting for differentupland cotton varieties ranged from 13% to 78%.Observations on heterosis in the characters of F_1 hybrids of G.hirsutum×G.barbadensewere summarized as follows:Plant Characters Comparison of bybrid with Upland and Seaisland parentsDays from planting to seedling Earlier than either parentDays from budding to flowering Intermediate nearer to earlier UplandDays from seedling to boll maturity Intermediate nearer to late Sea-island Days of bud development Intermediate nearer to earlier UplandDays of boll development Longer than Sea-islandDays from seedling to first boll maturity IntermediatePlant height Taller than either parentNumber of monopodia Less than either parent,but approaching Up landNumber of sympodia More than either parentNumber of fruiting points per plant More than either parentPosition of main stem nodes where first fruiting branch appears Lower than either parentInternode length of axis Longer than either parentInternode length of fruiting branch Longer than either parentPetiole length Longer than either parentLeaf area Larger than either parentLeaf lobe index Intermediate,approaching Sea-islandShedding percentage IntermediateDistribution of bolls in different parts of the plant Approaching Sea-island,most bolls setting at middle and upper parts of the plantWeight of seed cotton per boll IntermediateNumber of ovules per boll Approaching Sea-island in a lower numberMotes percentage More than either parentPistil length IntermediateCorolla area and index Larger than either parentSeed index Larger than either parentLint index IntermediateMaturity Intermediate,approaching late Sea-islandFibre length Longer than either parentFibre fineness Approaching Sea-islandYield in seed cotton Approaching Upland,higher than Sea-islandYield in lint cotton Lower than Upland,higher than Sea-islandProduction of dry matter More than either parentProduction of dry matter per square meter of leaf area More

1959—1962年试验证明,海陆杂种一代具有早熟、丰产、优质的特性。海陆杂种一代的籽棉产量接近陆地棉,而显著高于海岛棉。成熟期较海岛棉早,比陆地棉偏迟。生育特性一般介于两亲之间,不同程度的偏向于海岛棉,有的特性超过两亲范围以外。纤维细长,强度高,可以制成高挡纺织品。在江苏各地示范试种结果良好。在制种技术方面研究证明,采用具有某一隐性指示性状,进行不去雄杂交(人工辅助授粉),杂交率达70%,每工作日可制种6—8斤。

In this experiment,the cuttings of three varieties of sweet potato,North China 117,(early),Nancy (late),and Kao Tian Zi (late) were planted on six different dates,1/6,16/6,1/7,16/7 1/8 and 16/8 1957 to observe their enlargement of tubers and the growth of the topson fixed periods.1.The vine growth rate of sweet potato was much affected by the differences of variety andplanting date.In Ya-an district,Szechwan Province when the planting date of the cuttings wasbefore the middle part of July,the maximum increment...

In this experiment,the cuttings of three varieties of sweet potato,North China 117,(early),Nancy (late),and Kao Tian Zi (late) were planted on six different dates,1/6,16/6,1/7,16/7 1/8 and 16/8 1957 to observe their enlargement of tubers and the growth of the topson fixed periods.1.The vine growth rate of sweet potato was much affected by the differences of variety andplanting date.In Ya-an district,Szechwan Province when the planting date of the cuttings wasbefore the middle part of July,the maximum increment period of the stem length,the shootemergence and the leaf development as well as the maximum weight increment of the topsappeared in the middle part of October,but when the planting date delayed to August,it didnot appear until the later part of October,the mean temperature by that time dropped to orunder 18℃,thenceforward no matter earlier or later planting the stem grew extremely weak,more shoots and leaves withered,the weight of the tops decreased gradually.Among thevarieties,the flourishing growth period of the early variety came earlier and went to the leafwithering stage earlier too.2.The planting date affected the size and weight of the tubers especially markedly.Thetubers'of the vine planted before summer solstice were larger and heavier than those of plantedafter the middle part of July.The early variety decreasing in production due to late plant-ing was not so much as the late variety.In the mean time,the early variety started itstuber enlargement earlier and more quickly than that of the late variety.Though it was plantedas late as the middle part of August,it still produced 250 grams of tuber per plant.As to the value of T/R (top/root),the cutting planted earlier was lower than that ofplanted late.Moreover,the variation of T/R value of different planting dates in an earlyvariety was not so great as in a late variety.Therefore,in late planting,the early varietymight be more valuable from the economical point of view. 3.With same length of growing peroid (75 days) and nearly the same effective “ac-cumulated temperature”the tuber production of cuttings the first 60 days under 25℃ andthe next 15 days under 20-22℃ was better than that of cuttings under 23-27℃ the wholetime.If the time under high temperature was shorter than 50 days,even thenceforwardthey were given a longer time under a moderate temperature,their tuber production wouldalso decrease.Apparently,when the time of high temperature was too short,the vine growthlowered down,and thus,such condition would not be favourable to tuber enlargement.In thispoint,an early variety suffered less than a late one,for the early variety could use the shortgrowing period more efficiently.4.Cuttings had the same 90 days remaining in a higher temperature in the first part ofthe growing period,then the longer time to grow in the later part of their life,the greatermean daily increment in tuber weight would be.On the contrary,cuttings had the same90 days remaining in a lower temperature in the later part of the growing period,then,the shorter time to grow in a higher temperature in the first part of their life would havea smaller mean daily increment in tuber weight.Among varieties,the late variety had agreater degree of variation than the early ones.5.The results obtained in this experiment have showed that in Ya-an district Szechwan,the cuttings of sweet potato for autumn crop should not be planted later than the middle partof July and in order to guarantee a satisfactory yield,early variety should be used.

本文就不同品种在不同插苗期的试验,分析研究其茎蔓生长及块根膨大的相互制约及其与温度条件的关系。初步结果认为:甘薯生长前期的高温日数应不短于60—90天,且后期要有一定适温日数,对块根膨大才有良好作用。晚熟种对前期高温日数要求较长,而早熟种则可相对较短。

 
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