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   桑园 在 蚕蜂与野生动物保护 分类中 的翻译结果: 查询用时:0.018秒
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  mulberry field
Three factors contributing to the increase of cocoon output are: the cocoon output per box, the area of mulberry field, and the egg amount raised per unit area of mulberry field.
      
The results showed that the importance of the factors in increasing cocoon output was in the order: egg amount raised per unit area of mulberry field >amp;gt; cocoon output per box >amp;gt; area of mulberry field.
      
Survival and Fluctuation in Density of Myrothecium roridum in Mulberry Field Soil
      
  mulberry garden
Five typical land covers in West Tiaoxi catchment of China, including mulberry garden, bamboo forest, pinery, vegetable plot and paddy field, were studied on nitrogen loss in artificial rainstorm runoff and sediment.
      
One hectare of mulberry garden yields about 12.1 MT of mulberry sticks.
      
Studies on commercial viability of mulberry garden for chawki rearing.
      
To develop plant based formulations that can effectively contain mealy bug and leaf roller in mulberry garden.
      


Our study on the hatching of the over-wintering eggs of wild silkworm (Bombyx mandarina Leech) during 1980-1984 indicated that the pest had three gernerations per year in Jioxing-Huzhou regions. The hatching of overwintering eggs begin in mid-April and reached the peak in mid-June.It was misunderstood in recent half century that the eggs hatching in mid-April were'first gerneration, and those hatching in late-June 'second generation'' . In fact, both were hatched from overwintering eggs. According to surveying,...

Our study on the hatching of the over-wintering eggs of wild silkworm (Bombyx mandarina Leech) during 1980-1984 indicated that the pest had three gernerations per year in Jioxing-Huzhou regions. The hatching of overwintering eggs begin in mid-April and reached the peak in mid-June.It was misunderstood in recent half century that the eggs hatching in mid-April were'first gerneration, and those hatching in late-June 'second generation'' . In fact, both were hatched from overwintering eggs. According to surveying, the rate of hatching was 0.15% in late-April, 7.9% in late-May and 91% until June 20. The overwintering eggs were laid from September 17 to December 14 with the prevalence time of oviposition in mid-November. The earlier the eggs were laid, the earlier they hatched. As a result, the incubation period amounted 122 days. Thus, it could conclude that the long incubation period of overwintering eggs in spring was due to the long period of oviposition in previous autumn-winter seasons and the complicated ecological environment in mulberry plantation.

研究证实(1980—1984年),嘉湖平原野蚕年发生三代.越冬卵始孵期为四月中旬,盛期为六月中旬.但近半个世纪以来.很多人一直误认为四月中旬发生的野蚕是第一代,六月下旬发生的为“第二代”,事实上都是越冬卵孵化的幼虫.均为第一代.经测定,四月下旬越冬卵孵化率为0.15%,5月下旬为7.9%,6日20日为91%.本区野蚕产越冬卵最的早在9月17日,高峰期在11月上旬.结束期在12月14日,越冬卵产出越早,翌年卵孵期也早,孵化的早和迟之间可相差122天.野蚕越冬卵翌年孵化期长的原因.与秋冬产卵期长及桑园生态环境复杂有关.据室内4月24日越冬卵孵化的幼虫连续饲养,到第三代卵期恰与室外第二代卵期相重叠,说明自然界发生第四代是可能的,但真正存活率在1%以下.在防治措施上,以在越冬卵孵化高峰期(6月15—20日)施用0.1%敌敌畏.防效最好.

The mulberry stand structure (New Ichinose variety) was investigated during 1982-1985. The results outlined as follows. After the Summer-prunnig, as long as LAT was reached to 4.5 the leaves on the lower blanches became yellow and fallen occured, while in the spring the LAT even reachd to about10, we had not observed any leave yellowing and droping. The extinction coefficients, K, of mulberry stands varied between 0.3 to 0.7, depending on planting densities and the seasons, and it was rather constant accounted...

The mulberry stand structure (New Ichinose variety) was investigated during 1982-1985. The results outlined as follows. After the Summer-prunnig, as long as LAT was reached to 4.5 the leaves on the lower blanches became yellow and fallen occured, while in the spring the LAT even reachd to about10, we had not observed any leave yellowing and droping. The extinction coefficients, K, of mulberry stands varied between 0.3 to 0.7, depending on planting densities and the seasons, and it was rather constant accounted for the mid-bosal canony of the stands. The fact that the relative irradiance in the bottom of 5-year-old mulberry stands was decreased with the increase of planting densities demonstrates that the utilization rate of Solar energy can be increased by increasing planting density. The reasonable planting density for high productive mulberry yields in a short time in provinces of Jiangsu and Zhejiang, China, should be 2.000 plants per mu and not less than 1,000 plants per mu for ordinary ones.

1982—1985年调查分析了新一之濑的不同密度桑园的群体结构,结果表明:一、春季叶面积指数高达10左右时,没有黄、落叶发生,夏伐后不同密度桑园的叶面积指数达4.5左右时,枝条基部均有黄落叶出现。二、桑园的消光系数(K值)大多变动在0.3—0.7之间,且中、下层比较稳定。三、第五年的桑园底层相对照度仍随密度的增加而减弱,这再次说明,增加栽植密度是提高光能利用率的一个重要措施。江、浙两省的速成丰产桑园以亩栽2,000株为宜,普通桑园也不应少于1,000株。

YS-59 is a new variety of mulberry which was bred from the mulberry introduced from Soviet Union. Its suitable both for young and grown silkworms. Sponsored by our institute and in coorperation with some others we implemented individual selections. Eventually it was set as a final selection variety since 1978. It manifested excellent results through appraisal and assigned experiments. Through demonstration and popularization during 1979-1984 its physical characters, properties and values for extensions were...

YS-59 is a new variety of mulberry which was bred from the mulberry introduced from Soviet Union. Its suitable both for young and grown silkworms. Sponsored by our institute and in coorperation with some others we implemented individual selections. Eventually it was set as a final selection variety since 1978. It manifested excellent results through appraisal and assigned experiments. Through demonstration and popularization during 1979-1984 its physical characters, properties and values for extensions were affirmed. The period from the primary,secondary selection to final selections covered 20 years. The maternal plant was designated as 59-C. The main characters of this new variety possess a vigorous growth at the early stage, abundant tender branches; the tips of the trees grow quickly with big leaf blades, short inter-nodes; the leaves are of high quantity, good quality and ripe quickly. It possesses high efficacy in feeding silkworms than that of Japanese JC breed for young worms and the QY breed we are using in Jilin at present.Its an excellent variety for young and grown worms. Still its durable and easy to store and suitable for accelerate and close planting of ground trunk and low trunk mulberry fields.

延桑59为自苏联引进延边,经长期选优育成的稚蚕、兼全龄用桑新品种.经所内外结合,进行个体选择后,于1978年决选,并先后进行所内外鉴定试验和指定试验,表现优良.经1979—1984年示范推广,明确其特征和特性以及推广价值,从初选、复选到决选共用了20年时间.其母本简化号为59—C.选育品种延桑59的主要特点是,前期生长旺盛、嫩枝较多、新梢生长快,叶形大、枝态紧凑、节间密、产叶量高、叶质优良,叶片成熟快.养蚕效果优于日本稚蚕用桑品种剑持和本省现行推广品种秋雨桑,是优良的稚蚕、兼全龄用桑品种.并具有耐伐、耐贮,适于地桑、低干速成密植桑园栽植的特点.

 
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