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late crop
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  晚季
     Theideal width of the second leaf under the top leaf is 1.1-1.4 cm for the early crop and about 1.1 cm for the late crop.
     顶下2叶宽:早季1.1~1.4cm、晚季1.1cm左右;
短句来源
     The ideal length of the second leaf under the top leaf is 39-44 cm for the early crop and 37-43 cm for the late crop.
     顶下2叶长:早季39~44cm、晚季37~43cm;
短句来源
     The ideal length of the first leaf under the top leaf is 40-44 cm for the early crop and 42-60 cm forthe late crop.
     顶下1叶长:早季40~44cm、晚季42~60cm;
短句来源
     The idealtop leaf angle at the active tillering stage is 22-58 for the early crop and 4-12 for the late crop.
     顶叶开张角:早季22~58°、晚季4~12°。
短句来源
     The ideal tiller number per plant is about 15 tillers for the early crop and 14-19 tillers for the late crop.
     每蔸茎蘖数:早季15条左右、晚季14~19条;
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  “late crop”译为未确定词的双语例句
     The grain yields of BNCRF,BLCRF and BRCU were 10.75%,15.81% and 15.91% higher than SNRSF in early crop,and 7.66%,4.76% and 14.05% higher in late crop,respectively. There was no significant difference in grain yield between the two SF treatments.
     BNCRF、BLCRF和BRCU处理稻谷产量比SNRSF处理早稻分别增产10.75%、15.81%和15.91%,晚稻分别增产7.66%、4.76%和14.05%,而专用肥BNRSF处理稻谷产量与SNRSF处理无明显差异。
短句来源
     The larvae of the first generation infest the spring crop, those of the second and third generations both the spring and summer crops, and those of the third and fourth generations the late crop.
     一代幼虫主要危害春豆,二、三代相继危害春豆和夏豆,四、五代危害晚播大豆及赤豆等。 幼虫老熟后,在豆株茎壁上咬一羽化孔,以便成虫羽化钻出。
短句来源
     Compared with Ejingza 1(Control),it matures 4~5 days earlier when they were planted at late crop season of rice with same sowing date and similar cultivation condition.
     该组合的的主要特点是 :生育期短 ,熟期较早 ,作二季晚稻种植 ,比同期播种和同等栽培条件下的对照品种鄂粳杂 1号早熟 4~ 5d ,在秋季低温条件下稳产性更好 ,在多熟种植制中也具有更大的应用价值 ;
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  相似匹配句对
     The late alliance
     迟到的联盟
短句来源
     The Late Upsurge
     迟来的热潮——关于中国油画艺术及其市场
短句来源
     Crop Design
     作物设计
短句来源
     Late sowing,deep plowing and crop rotation had been proved to be effective controlmeasures.
     因此,合理轮作、深耕和适当晚播是综合防治中的重要措施。
短句来源
     Specialty: Crop production;
     专业:种植业领域;
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  late crop
In the second year, sub-subplot treatments with early or late crop residue incorporation were initiated after the 1995 DS maize or rice crop.
      
USDA announces assistance not needed for remaining 1954 late crop potatoes
      
Association of specific gravity with weight of individual tubers in late crop potatoes
      
Reduction of cracking of late crop potatoes at harvest time by root cutting or vine killing
      
Early versus late crop residue incorporation following DS maize or rice were established as additional treatments in sub-subplots in the second year.
      


The agromyzid fly Melanagromyza sojae is one of the most important pests infest ing soybeans. It occurs in all the soybean cultivation areas of Shantung Province and its host plants include more than nine cultivated and wild legume plants. The larvae tunnel into the stems and interrupt the conduction of water and nutrients. Soybean seedlings may thus be killed, the growth of the older plants is retarded, and the crop yields are greatly reduced.This insect has five generations each year in Shantung Province....

The agromyzid fly Melanagromyza sojae is one of the most important pests infest ing soybeans. It occurs in all the soybean cultivation areas of Shantung Province and its host plants include more than nine cultivated and wild legume plants. The larvae tunnel into the stems and interrupt the conduction of water and nutrients. Soybean seedlings may thus be killed, the growth of the older plants is retarded, and the crop yields are greatly reduced.This insect has five generations each year in Shantung Province. The pupae overwinter in the stems of the soybean plants and the adults emerge in next June. The larvae and adults of the first and second generations occur in July and August respectively. The population of the third generation larvae reaches its peak in late August and since then the fourth and fifth generations may overlap. The adults are very active at 6:00 to 8:00 AM and the eggs are laid singularly, mostly on the under surfaces near the midrib bases of upper leaves. The incubation period takes two to three days. The larvae of the first generation infest the spring crop, those of the second and third generations both the spring and summer crops, and those of the third and fourth generations the late crop.Proper treatments of field debris and the plants harbouring overwintering pupae, increasing fertilizers, early sowing and thinning out seedlings in proper times may be effective for controlling this pest. At the peaks of adult occurrence lower dosage sprays with 50% Sumithion, 50% Phoxim, 50% Malathion and 40% Dimethoate can give good results.

豆杆黑潜蝇是大豆的重要害虫之一,在山东省大豆产区均有分布。已知寄主有大豆、赤豆等九种豆科植物。幼虫蛀食髓部及木质部,形成隧道,严重影响养分和水分的传导。危害重时,幼苗枯死,轻时植株生长缓慢,花荚脱落,产量降低。 豆秆黑潜蝇在山东一年发生五代,以蛹过冬。翌年6月上旬末为蝇始发期,下旬中达盛发期。7月上旬为一代幼虫盛期,旬末为一代蝇始发期,下旬中达盛期,旬末至8月上旬中为二代幼虫盛期和二代蝇始发期,中旬达盛期,下旬为三代幼虫盛发期。四、五代重叠发生。成虫活动以6—8时为盛期。卵单粒散产,多产在叶背近基部主脉附近表皮下,以上中部叶着卵较多,卵历期2—3天。一代幼虫主要危害春豆,二、三代相继危害春豆和夏豆,四、五代危害晚播大豆及赤豆等。幼虫老熟后,在豆株茎壁上咬一羽化孔,以便成虫羽化钻出。 防治措施:集中处理越冬寄主,消灭越冬蛹:增施肥料,提早播种,适时间苗等农业措施,均有一定效果。在成虫盛发期用50%杀螟松、50%辛硫磷、50%马拉硫磷和40%乐果乳剂原液超低量喷雾,毒杀当代成虫及下代幼虫效果显著。

Forty-one rice cultivars pertaining to early-crop, mid-crop and late crop categories exhibiting early-maturing, intermediate-maturing and late-maturing behaviour respectively were subjected to 14 daylength treatments, both natural and artificial, ranging from 11 : 30(11 hours and 30 minutes),11 : 50,12 : 10,12 , 30,12 : 50, 13 : 10, 13 : 30, 13 : 50, 14 : 10, 14 : 30, 15 : 00,18 : 00 to 24 : 00 for the study of the critical photoperiod for panicle initiation. The following deductions are made from...

Forty-one rice cultivars pertaining to early-crop, mid-crop and late crop categories exhibiting early-maturing, intermediate-maturing and late-maturing behaviour respectively were subjected to 14 daylength treatments, both natural and artificial, ranging from 11 : 30(11 hours and 30 minutes),11 : 50,12 : 10,12 , 30,12 : 50, 13 : 10, 13 : 30, 13 : 50, 14 : 10, 14 : 30, 15 : 00,18 : 00 to 24 : 00 for the study of the critical photoperiod for panicle initiation. The following deductions are made from the results.( 1 ) Cultivars belonging to the early-crop and mid-crop categories evoked panicle initiation normally under a continuous illumination of 24 hours, therefore they are day-neutral (photoperiod insensitive). The majority of the early-maturing and intermediate-maturing cultivars belonging to the late-crop category required a critical photoperiod of 13 ; 10 (hour: minute) to 14: 10,therefore they are of short-day type. Nevertheless a lew of the cultivars belonging to the aforesaid type could head under continuous illumination, with a time requirement even less than that under 14 : 30 illumination, thus signifying that in the matter of critical photoperiod requirement they have duplicity. As regards the late-maturing cultivars belonging to the late-crop category their critical photoperiod was 12 5 50--13 : 10,indicating that they are also short-day types. .( 2 ) With regard to the photoperiod response curves, those of the earlv-crop and mid-crop cultivars all show a straight-line. Early-maturing cultivars of the late-crop category shows a "S" pattern, while in the same late-crop category but being interme-diate-maturing or late-maturing shows a "V" pattern.(3) Cultivars belonging to the early-crop category were the least: photoperiod sensitive;those belonging to the mid-crop category were weakly photoperiod sensitive: while those belonging to the late-crop category were strongly photoperiod sensitive. "Jing" rice oi the early-, mid-, and late-crop categories were stronger in their photoperio'd sensitiveness than the "Xing" rice of the early-,mid- and late-crop categories.( 4 ) Cultivars of the early-crop category ranged from very weak to mediocre in their sensitivity to temperature, while those of the mid-crop category ranged tome weak to mediocre .and those ol the late-crop category ranged from strong to very strong.(5) As to the minimum growth duration,under short daylength and high temperature, required for panicle initiation, the mid-crop category needed the longest length of time, the late-crop category the shortest, with the early-crop category in-between.( 6 ) Cultivars of the early-crop and mid-crop categories were adapted to a very wide range of daylength. therefore introduction of them from outside sources will be met with greater success. Cultivars of the late-crop category were adapted only to a narrower range of davlength, therefore their introduction should be effected with treat care

本研究用早、中、晚稻41个品种,于早、中、晚季在自然和人工控制光长(11.5~24.0小时,分为13级)共14级光长处理下,观察了各类型品种出穗临界日长的情况表明;品种出穗临界日长,早稻和中稻品种在24:00(时:分,以下同)光照连续处理下,可正常出穗,不受光照长短影响,属中间性类型。晚稻早熟和中熟品种出穗临界日长,大多数是在13:10~14:10之间,属短日性类型。极少数品种在24:00可出穗,它们的出穗日数反比之在14:30下的出穗日数少,具有两面性的光周期性的反应。晚稻迟熟品种出穗临界日长为12:50~13:10,属短日性类型。品种出穗日长反应曲线,早稻和中稻是直线型,晚稻早熟品种是“S”字型,晚稻中熟和迟熟品种是“V”字型。品种感光性早稻、中稻最弱;晚稻早熟品种强、中熟品种较强、迟熟品种最强。品种的感温性是早稻弱的多,中的少;中稻是弱或中;晚稻在自然和短日下的感温性强至最强。品种短日高温生育期是早稻中,中稻长,晚稻最短。早稻和中稻对日长适应范围广,异地引种易成功。晚稻对日长适应范围狭,引种选择要严格,

During the last four years the authors have conducted a series of investigations on the collection, rearing and identification of the parasites of the rice gall midge in Kwangtung Province. Preliminary observations on the bionomics of the parasites and experiments on the effect of insecticides on them were also carried out. The results of studies obtained are summarized as follows:1. Altogether 5 species of hymenopterous parasites on the rice gall midge have been found in Kwangtung Province. They are:Platygaster...

During the last four years the authors have conducted a series of investigations on the collection, rearing and identification of the parasites of the rice gall midge in Kwangtung Province. Preliminary observations on the bionomics of the parasites and experiments on the effect of insecticides on them were also carried out. The results of studies obtained are summarized as follows:1. Altogether 5 species of hymenopterous parasites on the rice gall midge have been found in Kwangtung Province. They are:Platygaster sp. (gregarious endoparasite)Platygaster sp. (solitary endoparasite)Neanastatus grallarius MasiNeanastatus oryzae PerriereObtusiclava oryzae Sabba RaoThe morphology of the various stages of these parasites are described and a brief account of their bionomics is also given. Usually the gregarious Platygaster parasite is the predominant species, but during the seedling and tillering stage of the late crop (both in the seed-beds and in the field) the population of Neanastatus may increase to as high as 70-80% of the 5 species in total. These parasites possess different characteristics in biology and play different roles in suppressing the outbreaks of the rice gall midge. Further investigations will help us to know how to utilize these parasites in the program of integrated pest management in rice fields.2. The percentage of parasitism of the rice gall midge in the seed-beds and fields of the late crop was found to be very high, in some cases as high as, 90% or more. This contributes an important factor in controlling populations of the gall midge. The outbreak of the gall midge is closely correlated to the cropping system; the late crop and the triple rice crop afford a "bridge" for the favorable reproduction of the gall midge. The irrational application of insecticides kills the natural enemies and is also one of the factors leading to the resurgence of the insect pest.3. According to the investigations made in 1976 in San-Hua brigade, Hua county, the percentage of parasitism on the rice gall midge in the overwintering generation in the wild rice (Oryzae rufipogon) reached as high as 65%, and in the first aad second generations of the early crop the parasitism was found to vary from 32.5% to 33.3%. But in the seed-beds of the late crop, due to the frequent applications of insecticides, usually with a spraying of Methyl parathion-BHC and Dimethoate at an interval of 4-5 days, the percentage of parasitism dropped to 1.53-4.5%, whereas in the field with no insecticide treatment it was about 44%. This indicates that the conventional method of the application of insecticide produces adverse effects to the parasites.4. Laboratory experiments were carried out to determine the toxicity of several insecticides to the parasites of the rice gall midge. As a contact poison the organophosphorus compound Pyrimioxythion (N-23) was the most toxie, and chlorodi-meform was the least toxic. The order of toxicity to Platygaster sp. was: Pyrimioxy-thion > Trichlorofon > Dimethoate > (2,5-Dimethylphenyl-N-methylcarbamate) > Chlorodimeform. The LC50 of the five compounds was estimated to be 1.1, 3.5, 5.5, 15.0 and 24.0 ppm, respectively. As a foliar spray, Pyrimidoxythion is also more toxic than Methyl parathion-BHC to Obtusiclava oryzae and Neanastatus spp. The formulations and methods of applications of the insecticides is very important to the protection of the parasites. As a rule, broadcasting of impregnated-dusts is less hazardous to the natural enemies and the root-zone method of application givea good protection to the parasites and the spiders in the rice field. Thus there is a possibility that the rational use of insecticides will help to increasing the stability of the paddy agro-ecosystem and it may be of great utility in developing an efficient integrated control program for the rice gall midge as well as other insect pests.

在广东稻瘿蚊常见的寄生蜂有5种:(1)黄柄黑蜂Platygaster sp.(群居内寄生天敌);(2)单胚黑蜂Platygaster sp.(独居内寄生天敌);(3)黄斑长距旋小蜂Neanastatus grallartus Masi.;(4)稻长距旋小蜂Neanastatus oryzae Ferriere;(5)斑腹金小蜂Obtusiclava oryzae Subba Rao。这5种寄生蜂中黄柄黑蜂发生较普遍,在一年间大部分时间发生数量多于长距旋小蜂及斑腹金小蜂。稻瘿蚊寄生蜂在晚造秧田及本田寄生率有时达90%以上,对抑制稻瘿蚊的发生起了相当大的作用。 几种常用农药对寄生蜂毒杀作用的比较试验,分别在室内及田间进行。以嘧啶氧磷对寄生蜂毒杀最大,杀虫脒最小。对寄生蜂的毒力大小比较为:嘧啶氧磷>敌百虫>乐果>叶飞散>杀虫脒。

 
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