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forestry     
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  林业
     A Study on Service System of Forestry Resource and Environment Information Based on Internet (FINFOSYS)
     基于Internet的林业资源环境信息服务系统(FINFOSYS)的研究
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     Study of Chinese Forestry Industry Administrative System
     中国林业管理体制研究
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     Study on Forestry Industrialization
     林业产业化研究
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     Study on Forestry Taxation and Fee Reform
     我国林业税费改革研究
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     Study on the Classification Management and Forest Ecological Benefits Compensation of Sustainable Forestry
     论持续林业的分类经营与生态效益补偿
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  森林
     Research on Economic Problem of Forestry Carbon Sink
     森林碳汇经济问题研究
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     Dynamic Analysis of Forest Resources and Biodiversity Economic Value in Yingchun Forestry Bureau
     迎春林业局森林资源及生物多样性经济价值的动态分析
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     Research on Value Evaluation for the Assets of Forestry Biodiversity
     森林生物多样性资产价值评估研究
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     S.D.Model on Dynamic Prediction of Forest Resources in A Mu Er Forestry Bureau
     阿木尔林业局森林资源动态预测S.D.模型
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     K-T TRANSFORMATION'S FORESTRY SIGNIFICANCE AND APPLICATION OF IT TO REMOTELY SENSED ESTIMATE OF STAND VOLUME
     K-T变换的林学意义及其在森林蓄积量估算中的应用
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  林学
     MODERN FORESTRY OUTLOOK AND SUSTAINABLE DEVELOPMENT OF FORESTRY
     现代林学观与可持续林业发展
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     Modern Forestry Science,Forest and Forestry
     现代林学、森林与林业
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     New Recognitions on Modern Forest Science,Forests and Forestry:Discussions on Fortstry Development in Beijing
     再论现代林学、森林与林业——对北京林业发展之初议
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     The Metasequoia not only provided the important substantial evidence to the development of the new Chinese forest,but also important symbol to science and technology in the development of forestry and socialism.
     水杉既为新中国林业的发展提供了重要实证,又是科学技术在林业及社会发展中的重要体现,同时水杉的发展也是我国林学界最值得骄傲的一件大事,是我国科技工作者集体智慧的结晶。
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     K-T TRANSFORMATION'S FORESTRY SIGNIFICANCE AND APPLICATION OF IT TO REMOTELY SENSED ESTIMATE OF STAND VOLUME
     K-T变换的林学意义及其在森林蓄积量估算中的应用
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     Study on History of Forestry Policy of China Since Qing Dynasty
     中国清代以来政史研究
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     GROUND SPRAYER DESIGNS FOR FORESTRY APPLICATIONS
     用地面行走式喷洒系统的设计
短句来源
     Two Sorts of Small Forestry Machine——3WC-5 Carth Auger, 3SFZ-30 Deep Turn Hoe
     两种小型用机具—3WC-5型挖穴机、3SFZ-30型深翻锄
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     Developing papermaking industry, vitalizing the forestry economy
     发展办造纸 振兴业经济
短句来源
     Analysis on Technical and Economic Effect of Main Forestry Measures Adopted in Phyllostachys pubescens Grove
     毛竹主要营措施技术经济效果分析
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  forestry
According to the international methods of pest risk analysis and urban forestry characteristics in Beijing, a quantitative risk assessment system in Beijing for three primary non-indigenous pests was proposed.
      
Eco-emigration and the return of marginal agricultural land to forestry can be practiced.
      
This study was conducted at Maoershan Forest Research Station (45°21'-45°25'N, 127°30'-127°34'E) owned by Northeast Forestry University in Harbin, northeast China.
      
The Maoershan forestry centre is situated in the Zhangguangcai Mountain of the Changbai mountain range.
      
Following the principles of runoff-collecting forestry and applying the forest structure investigation results, the authors developed a formula to calculate appropriate density for forests on the basis of different diameters at breast height (DBH).
      
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A study on the life history of the Large Chestnut brown Chafer was carried out inShalato, Luho, from 1955 to 1963. The larva of this chafer injures barley, wheat, pea,potato, corn and sugar beet, and the adult attacks forest trees. It is one of the serious pestof agriculture and forestry in the north-west of Szechwan. In Shalato, a complete lifecycle of this insect needs six years. The first five winters are in the larval stages andthe last winter passed over in adult stage only. The eggs hatch from late...

A study on the life history of the Large Chestnut brown Chafer was carried out inShalato, Luho, from 1955 to 1963. The larva of this chafer injures barley, wheat, pea,potato, corn and sugar beet, and the adult attacks forest trees. It is one of the serious pestof agriculture and forestry in the north-west of Szechwan. In Shalato, a complete lifecycle of this insect needs six years. The first five winters are in the larval stages andthe last winter passed over in adult stage only. The eggs hatch from late July to thebeginning of October. The egg stage lasts 45 to 66 days. Larval stage lasts more than58 months. At the middle of October the larvae burrow down into a depth of morethan 40 cm. In the soil where they pass the winter. At the middle of April in thesecond year, they begin to move upward and feed on plants. After five winters,pupation takes place at a depth of 12--44 cm below the surface of the soil. Pupal stagelasts about two months. From the late July to the beginning of September, the beetleemerges, it remains underground untill the beginning of May in next year. The swarm-ing of the beetles may be found in the middle or latter part of May. As soon as thebeetles crawld out from the earth, they fly toward the forest of pitchpine, on which theyfeed and copulate. At the end of May, the female flies backward to the field and layeggs into the soil. Eggs are often gathered in clusters, each containing 12--28 eggs. Theadult stage lasts about ten months, and dies out at the period from the middle of Juneto the beginning of July.

大栗金龟(虫甲)是四川西北部重要农林害虫之一,幼虫为害青稞、小麦、豌豆、马铃薯、玉米、甜菜等作物及森林苗圃中的幼苗,成虫为害杉树、桦树、杨树等森林。1955—1963 年在炉霍虾拉沱进行了一系列的调查研究,查明大栗金龟(虫甲)在炉霍虾拉沱六年发生—代,幼虫越冬五次,成虫越冬一次。卵于7月下旬至10月上旬孵化为幼虫,卵期由于产卵时期的温度和土壤湿度不同而为45—66天。幼虫于10月中旬开始下降至40厘米以下越冬,第二年4月中旬开始上升至5—15厘米的土层为害;五次越冬后,于6月中旬至7月上旬在12—44厘米的土层中化蛹,幼虫期58个月强。蛹于7月下旬至9月上旬羽化为成虫,蛹期约两个月。成虫当年不出土,第二年5月上旬开始出土,中下旬最盛:出土后,飞往附近林缘杉树上取食交尾。5月下旬末,雌虫开始飞回田间产卵,成堆产在13—26厘米的土层中,每堆12—28粒。成虫于6月中旬至7月上旬死亡,成虫期约10个月。

Early in 1961, the hawthorn spider mite has become difficult to control with systoxin some apple orchards of Honan. Growers thought these failures may be due to eitheradverse weather conditions or faulty application with poor formulation. However, inthis season, systox was found to give very satifactory control with same application techni-ques and formulation as in other orchards. Therefore it was probable that red spidermite may have become resistant to systox. The series of laboratory tests showed that the...

Early in 1961, the hawthorn spider mite has become difficult to control with systoxin some apple orchards of Honan. Growers thought these failures may be due to eitheradverse weather conditions or faulty application with poor formulation. However, inthis season, systox was found to give very satifactory control with same application techni-ques and formulation as in other orchards. Therefore it was probable that red spidermite may have become resistant to systox. The series of laboratory tests showed that the mite of various colonies collected fromdifferent apple orchards responded differently to systox. Log-probit regression equationand LC_(50) are given in table 1. The LC_(50) of the mite adults of Jeng-chow Forestry Re-search Station colony was 197.2, Honan Academy of Agriculture colony was 41.69, Ho-nan Agricultural College colony was 3.388, Er-Li-Gang apple orchard colony was 3.864,Chang-jay apple orchard colony was 3.09. Comparing LC_(50) of these 4 colonies withChang-jay apple orchard colony, it was found that the degree of resistance to systoxwas 63, 8, 13.4, 1.09, 1.25 fold respectively. Thus the Jeng-chow Forestry Reserchstation colony developed the highest resistance and came to about 63.8 times as resistantas the Chang-jay apple orchard colony. So that the degree of resistance to systox ofspider red mite colonies depended on the munber of applications of insecticide per year. By laboratory studies it was found that populations resistant to systox were alsoresistant in various degree to most other organophosphorus compounds, but strains re-sistant to organophosphorus acaricides were not resistant to the chlorinated-hydrocarbon. Laboratory and field tests indicated TDN had good ovicidal properties and wassignificantly better than AK338, K6451, and there was some evidence that TDN had atoxic effect on the eggs developing in the ovary, causing the eggs deposited by theseadults not to hatch, but concentration effective against eggs had only a limited effecton nymphs and adults 24 hours after application. K6451 sprayed directly on the eggsgave good kill (100 percent at 640 ppm), whereas AK338 were signficantly effectiveagainst nymphs and adults.

1963—1964年在河南省几个果园测定了山楂红蜘蛛对内吸磷的抗药性,并用8种杀螨剂分别对抗性品系和感性品系进行了药效测定。测定结果表明:郑州园艺场的种震对内吸磷的抗性最高,河南省农业科学院的种群已形成抗性的过渡品系。 在测定的几种杀螨剂中效果较好的有K6451,在320和640ppm 浓度下杀卵效果显著,但对抗性品系的成螨和若螨的效果则较差。敌敌畏对抗性品系有交互抗性。三硫磷对感性品系的各虫态均有良好效果,但对抗性品系有交互抗性。AK338对抗性及感性品系各虫态均有高效。三氯杀螨砜对抗性及感性品系的成螨和若螨效果极差,但残效期长且对卵有较好效果。磷胺对抗性品系有交互抗性,对感性品系效果显著。对硫磷对抗性品系有较高的交互抗性,在1280和2560ppm情况下死亡率方达82%和95%,而对感性品系则效果很好。

An avifaunal survey of Natural Reserve of Baishuijiang in Gansu(Kansu)province was made in 1963-1974。A total of 750 specimens wascollected; they were found to belong to 16 orders, 41 families and 180species. Among the fauna of the species mentioned above, 29 species areregarded as new records in Gansu province. From the preliminary analysis of our material, there are 63 speciesappertaining to Oriental region, making up 35% of our collection; 42species are found to be 23.3%of the total number belonging to Palearcticregion;...

An avifaunal survey of Natural Reserve of Baishuijiang in Gansu(Kansu)province was made in 1963-1974。A total of 750 specimens wascollected; they were found to belong to 16 orders, 41 families and 180species. Among the fauna of the species mentioned above, 29 species areregarded as new records in Gansu province. From the preliminary analysis of our material, there are 63 speciesappertaining to Oriental region, making up 35% of our collection; 42species are found to be 23.3%of the total number belonging to Palearcticregion; other 75 species, about 41.7%, are of the two regions mentionedabove. Based on the research of stomach contents, it has been shown that54.5% of the common insect-eating or carnivorous, such as Cuculus,Picus, Dendrocopos, Upupa, Apus, Raparia, Hirundo, Phanicurus, lanius, Turdus, Phylloscops, Parus, etc. They are dominating, onaccount of their being beneficial to forestry and agriculture, theyshould be put under protection; 22 species, making up 12.5% of thetotal number, living on the plants and thier products only. Other 58species, about 32.9%, are of both nutritive forms mentioned above.It must be pointed out that birds like Alcinidae, Columbidae,Plocidae, etc, which are harmful species, should be controlled。

1963——1964;1974年8月——1975年5月对甘肃省~*白水江自然保护区鸟类区系进行了研究。共获标本758隻,连同野外观察所得,经鉴定为16目、41科、180种。其中29种为甘肃新纪录。从所集资料初步分析:有63种鸟类属东洋界的种类,占所采鸟类35%;42种鸟类属古北界的种类,占所采鸟类23.3%;其余75种约占所采鸟类41.7%为两界兼有种。根据176种鸟胃内含物检查的结果表明:有96种鸟类为普通食虫鸟或肉食性鸟类,占全部检查用鸟54.5%。这些鸟如杜鹃、绿啄木鸟,斑啄木鸟、戴胜、雨燕、沙燕、家燕、金腰燕、红尾鸲、伯劳、鸫,柳莺、山雀等,它们都是优势种,有益于森林和农业,应予以保护;有22种鸟类,约占全部胃检用鸟类 注白水江自然保护区为原“让水河自然保护区”扩大并易命而来。12.5%纯以植物及其产物为食;其余58种,约为全部胃检用鸟类32.9%兼有上述两种营养方式。必须指出,雉科鸟类虽取食部分农作物,但像锦鸡、蓝马鸡、绿尾虹雉、红腹角雉、血雉等,都是国家保护的珍贵鸟类;他如勺鸡、雉鹑等,数量不多,亦应保护。翠鸟科、鸠鸺科、文鸟科的鸟类。大都有害,应予以控制。

 
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