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the yield
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  产量
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  “the yield”译为未确定词的双语例句
    A GENETIC STUDY ON THE YIELD AND YIELD CHARACTERS OF HYBRID F_2 POPULATION OF BARLEY
    大麦杂种F_2组合产比及其性状遗传
短句来源
    STUDIES ON THE LIGHT ENERGY UTILIZATION AND HIGH YIELD CULTIVALION Ⅰ.The source of solar radiation and the yield potential of rice in Jiangxi
    水稻光能利用与高产栽培研究——Ⅰ江西的太阳辐射资源与水稻生产潜力
短句来源
    INVESTIGATION ON THE YIELD POTENTIAL OF RICE IN NORTHEAST AREA OF GUIZHOU PROVINCE ——Analysis on Comprehensive Technique for High-yield of Rice in Dejiang County
    黔东北地区水稻高产潜力探讨——德江县水稻中心示范田综合配套技术及分析
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    On the model of water-fertilizer interaction for increasing the yield of winter wheat
    冬小麦水肥增产耦合效应模型研究
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    Effect of Different Fertilizer Structure on the Yield of Wheat and Maize and the Quality of Wheat
    不同施肥结构的增产效应和对小麦籽粒品质的影响
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  the yield
H4SiW12O40-PAn is an excellent catalyst for synthesizing n-butyraldehyde 1,2-propanediol acetal, and the yield can reach more than 95.2%.
      
The yield of glutaric dialdehyde by this method can reach 73%.
      
The yield of the final product was 78%, and the melting point was 231-233°C.
      
Effect of the reaction time, mole ratio of reactants, and amount of catalyst on the yield of benzodioxoles were investigated.
      
The starting material used abroad is expensive and the yield is low (16%-28%); furthermore, to our best knowledge, no characterization of Compound A is available in the open literature.
      
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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。

For the purpose of comparing the relative effect of various farm manures,field experimentswere carried out for four years at Nanking on a paddy soil;containing organic matter 1.5%,deri-ved from yellowish brown earth.The adsorption of nitrogen by one harvest of rice plant of the medium ripening variety was22—27% for rape-seed cake,17% for green manure,15% for water-logged compost,13% forstable manure,and 4.6—6% for pond mud.For rice of the early ripening variety,the percentageadsorption of nitrogen was 30%,20%,7.3%...

For the purpose of comparing the relative effect of various farm manures,field experimentswere carried out for four years at Nanking on a paddy soil;containing organic matter 1.5%,deri-ved from yellowish brown earth.The adsorption of nitrogen by one harvest of rice plant of the medium ripening variety was22—27% for rape-seed cake,17% for green manure,15% for water-logged compost,13% forstable manure,and 4.6—6% for pond mud.For rice of the early ripening variety,the percentageadsorption of nitrogen was 30%,20%,7.3% and 5.7% for the green manure,water-loggedcompost,mixed stable manure of cattle and swine,and grass compost respectively.On the basis of relative effect of various manures on the yield of rice,it was calculated that1 kg N of stable manure was equivalent to 0.45 kg N of rape-seed cake,0.55 kg N of greenmanure,0.7 kg N of water-logged compost,and 2.1—2.5 kg N of pond mud.For rice of theearly ripening variety,1 kg N of stable manure was equivalent to 0.38 kg N of gree manure,0.49 kg N of water-logged compost,and 1.19 kg N of grass compost.The liberation of nitrogen from manures proceeded most rapidly for the green manure,rape-seed cake entering the second and then water-logged compost.The liberation of nitrogen fromthe pond mud was so slow that it could hardly be distinguished from the controll treatment.Attention must pay to use nitrogen fertilizers as top-dressing when large amount of green manurehad be applied in order to prevent the lodging of rice plant,and on the contrary the applicationof top-dressing was essential when pond mud was used as the basic dressings.

本试验(自1956—1959年)在南京黄褐色母质发育的水稻土(有机质1.5%,全N0.086%,速效P_2O_5 0.008%,速效K_2O 0.0178%)上进行。1.各农肥的肥效如下:(1)氮素肥效折合率约为:中稻:堆(?)肥1斤N(?)菜饼0.45斤N(?)绿肥0.55斤N(?)草塘泥0.7斤N(?)塘泥2.1—2.5斤N。早稻:猪牛(?)肥1斤N(?)绿肥0.38斤N(?)草塘泥0.49斤N(?)青草堆肥1.15斤N。(2)对水稻的氮素吸收利用率约为:中稻:菜饼22—27%,草塘泥15%,绿肥17%,堆(?)肥13%,塘泥4.6—6%。早稻:绿肥30%,草塘泥20%,猪牛(?)肥7.25%,青草堆肥5.7%。2.各农肥在水田中自6月中旬至9月上旬,NH_4-N 的释放量以绿肥最快最大,菜饼的分解速率仅次于绿肥,但在施肥一个半月后释放量达到最高峯。草塘泥兼有迟速效特性,释放速率及释放量都比较平稳,不象绿肥那样猛发,又比堆(?)肥速效成份高,比河泥养分释放快。堆(?)肥释放情况介于草塘泥与河泥之间,后期分解量较高。河泥释放量最差,有时几和对照相近。此外,土壤分析结果指出:在种中熟籼稻的土壤中NH_4-N ...

本试验(自1956—1959年)在南京黄褐色母质发育的水稻土(有机质1.5%,全N0.086%,速效P_2O_5 0.008%,速效K_2O 0.0178%)上进行。1.各农肥的肥效如下:(1)氮素肥效折合率约为:中稻:堆(?)肥1斤N(?)菜饼0.45斤N(?)绿肥0.55斤N(?)草塘泥0.7斤N(?)塘泥2.1—2.5斤N。早稻:猪牛(?)肥1斤N(?)绿肥0.38斤N(?)草塘泥0.49斤N(?)青草堆肥1.15斤N。(2)对水稻的氮素吸收利用率约为:中稻:菜饼22—27%,草塘泥15%,绿肥17%,堆(?)肥13%,塘泥4.6—6%。早稻:绿肥30%,草塘泥20%,猪牛(?)肥7.25%,青草堆肥5.7%。2.各农肥在水田中自6月中旬至9月上旬,NH_4-N 的释放量以绿肥最快最大,菜饼的分解速率仅次于绿肥,但在施肥一个半月后释放量达到最高峯。草塘泥兼有迟速效特性,释放速率及释放量都比较平稳,不象绿肥那样猛发,又比堆(?)肥速效成份高,比河泥养分释放快。堆(?)肥释放情况介于草塘泥与河泥之间,后期分解量较高。河泥释放量最差,有时几和对照相近。此外,土壤分析结果指出:在种中熟籼稻的土壤中NH_4-N 在10微克/克土(ppm)以下似难被利用(图1)。3.就植株氮素吸收利用及生长情况可看出:施用绿肥对中稻的营养生长有特别促进作用。如施用量稍多,就会引起先期猛发,徒长茎叶,增加草谷比例,产量并不能提高,因此施绿肥时,配合速效氮肥做面肥或施追肥时应特别注意,在绿肥用量较高时,再用速效氮肥往往有害无益。如直接施用绿肥,则施用量不宜过多,耕翻时也要适当提早,速效肥要看苗施用。草塘泥性平稳,用做基肥时,配合少量化学氮肥做面肥及穗肥均可进一步提高产量。堆(?)肥与河泥性质慢,不论施用于中稻或早稻,均必须增施速效肥料,不然肥效很低。早稻生长初期气温低,农肥养分释放慢,同时早稻生长期短,插秧后20天即进入幼穗分化期,因此分解较快的绿肥,及含速效氮较多的草塘泥用做早稻基肥,效果更为显著。所有农肥增施了速效氮肥做面肥及追肥都有良好增产效果,其中分解愈慢的农肥效果愈大。例如绿肥及草塘泥增施速效氮肥后产量增加48.3%及43.2%,N 素吸收利用率增加1倍及8成,而青草堆肥配合速效氮肥时,产量增加85%,N 素吸收利用率提高近四倍(表13)。4.各农肥单独施用做早稻基肥时,植株每日氮素吸收量皆以抽穗期为最多,若增施速效N 肥后,则每日氮素吸收量最多时期均由抽穗期提前至幼穗分化期,同时产量也显著提高(表5)。

Field practice has long proved that the application of straw ash on newly reclaimed paddy soils derived from the lacustrine deposit in the flooded areas of Li-Shia-Ho,Kiangsu, greatly increases the yields of wheat,barley and other upland crops.Field experimentes were conducted to compare the effect of superphosphate with straw ash as basic dressings at a same level of phosphate fertilizer.Results revealed that superphosphate has a similar effect as straw ash. Laboratory investigations gave evidences that...

Field practice has long proved that the application of straw ash on newly reclaimed paddy soils derived from the lacustrine deposit in the flooded areas of Li-Shia-Ho,Kiangsu, greatly increases the yields of wheat,barley and other upland crops.Field experimentes were conducted to compare the effect of superphosphate with straw ash as basic dressings at a same level of phosphate fertilizer.Results revealed that superphosphate has a similar effect as straw ash. Laboratory investigations gave evidences that fixation of available soil phosphorus takes place as the flooded soil dried out through reclamation and drainage.

1.沤田水稻土具有特殊的化学和物理化学特性,在沤改旱过程中,速效性磷遭受显著的固定,速效性磷的缺乏,可能是沤改旱田旱作低产的主要原因之一。2.典型调查及大田对比试验材料表明,草木灰对沤改旱田旱作(三麦、绿肥)有显著的增产效果,其增产幅度因沤田类型、沤改旱的其他农业技术措施的配合情况等不同而不同。3.草木灰具有显著肥效的原因很多,如提高土温、疏松土壤等,但其主导因素可能与其含有较丰富的速效性磷有关。 4.过磷酸钙对沤改旱田旱作有显著的增产效果。每亩施用过磷酸钙30斤作基肥,其肥效与500斤稻草灰相等,大麦产量较对照增产95.8%。单施(基肥)硫酸钾、碳酸钙或硫酸铵对沤改旱田大麦也具有增产效果,但其肥效远逊于过磷酸钙。5.过磷酸钙拌种可减少肥料用量,每亩10斤过磷酸钙拌种,大麦产量较对照可增产58.7%。无论过磷酸钙或草木灰均以用作基肥效果最大,施用时间愈迟,其肥效将愈降低。

 
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