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broadleaf     
相关语句
  阔叶
     According to the field trail on the safety of Fomesafen and the mixed herbicide to the soybean and the control effect to broad leaf weed in soybean field, the usage of Fomesafen 1.0L/hm2+ 1.0L/hm2 and Fomesafen 0.75 L/hm2+ Bentazone 1.5L/hm2 provide the best control.
     通过田间试验明确了虎威及其混剂对大豆田阔叶杂草的防除效果及对作物的安全性,提出了最佳配方为虎威1.0L/hm2+排草丹1.0L/hm2及虎威0.75L/hm2+排草丹1.5L/hm2。
短句来源
     Fluroxypyr at 50ml/667m 2 was the best in control of broadleaf weeds, which two control effect were 93.4% and 97.6%.
     使它隆 50 ml/ 6 6 7m2 防除阔叶杂草的效果最佳 ,株防效为 93.4 % ,鲜重防效达 97.6 % ;
短句来源
     Broadleaf Weed Control in Spring Wheat with Picloram 20% AS
     20%毒莠定水剂防除春麦田阔叶杂草
短句来源
     The stable infiltration rates of the soil of four typical forest stands were ranked in the following order: evergreen broadleaf forests(10.169 mm/min) > P.pubescens forests(0.927 mm/min) > mixed P.massoniana-deciduous forests(0.743 mm/min) > evergreen broadleaved forests(0.551 mm/min) > arable farmland(0.253 mm/min).
     4种典型林分森林土壤稳渗率的顺序为:常绿阔叶灌丛(10.169 mm/min)>楠竹林(0.927 mm/min)>马尾松阔叶混交林(0.743 mm/min)>常绿阔叶林(0.551 mm/min)>农地(0.253 mm/min);
短句来源
     The result showed10%Caowei weeded widely,had specially good effect on sedge family and broadleaf weeds and cockspur grass,the total effect of10%Caowei15g /667m 2 was6.8%more than10%Caokexing,22.2%more than10%Yikejing,improved17.9%in output than blank.
     结果表明,10%草威杀草谱广,对莎草科和阔叶杂草有特效,对稗草有极强的抑制使用。 10%草威15g/667m2总防效比10%草克星提高6.8%,比10%一克净提高22.2%,比空白对照增产17.9%。
短句来源
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  阔叶
     According to the field trail on the safety of Fomesafen and the mixed herbicide to the soybean and the control effect to broad leaf weed in soybean field, the usage of Fomesafen 1.0L/hm2+ 1.0L/hm2 and Fomesafen 0.75 L/hm2+ Bentazone 1.5L/hm2 provide the best control.
     通过田间试验明确了虎威及其混剂对大豆田阔叶杂草的防除效果及对作物的安全性,提出了最佳配方为虎威1.0L/hm2+排草丹1.0L/hm2及虎威0.75L/hm2+排草丹1.5L/hm2。
短句来源
     Fluroxypyr at 50ml/667m 2 was the best in control of broadleaf weeds, which two control effect were 93.4% and 97.6%.
     使它隆 50 ml/ 6 6 7m2 防除阔叶杂草的效果最佳 ,株防效为 93.4 % ,鲜重防效达 97.6 % ;
短句来源
     Broadleaf Weed Control in Spring Wheat with Picloram 20% AS
     20%毒莠定水剂防除春麦田阔叶杂草
短句来源
     The stable infiltration rates of the soil of four typical forest stands were ranked in the following order: evergreen broadleaf forests(10.169 mm/min) > P.pubescens forests(0.927 mm/min) > mixed P.massoniana-deciduous forests(0.743 mm/min) > evergreen broadleaved forests(0.551 mm/min) > arable farmland(0.253 mm/min).
     4种典型林分森林土壤稳渗率的顺序为:常绿阔叶灌丛(10.169 mm/min)>楠竹林(0.927 mm/min)>马尾松阔叶混交林(0.743 mm/min)>常绿阔叶林(0.551 mm/min)>农地(0.253 mm/min);
短句来源
     The result showed10%Caowei weeded widely,had specially good effect on sedge family and broadleaf weeds and cockspur grass,the total effect of10%Caowei15g /667m 2 was6.8%more than10%Caokexing,22.2%more than10%Yikejing,improved17.9%in output than blank.
     结果表明,10%草威杀草谱广,对莎草科和阔叶杂草有特效,对稗草有极强的抑制使用。 10%草威15g/667m2总防效比10%草克星提高6.8%,比10%一克净提高22.2%,比空白对照增产17.9%。
短句来源
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  阔叶树
     The maximum of broadleaf trees such as Rhus typhina, Robina pseudoacacia, Acer mono, Amorpha fruticcosa reached as high as 50.18 g/h,43.67 g/h,46.267 g/h and 43.73 g/h respectively.
     阔叶树种中,火炬树(Rhus typhina)、刺槐(Robina pseudoacacia)、元宝枫(Acer mono)、紫穗槐(Amorpha fruticcosa)耗水速率的最大值分别达50.18、43.67、46.267 g/h和43.73 g/h。
短句来源
     Study on the seedling technology of 25 species excellent broadleaf
     25种优良阔叶树种育苗技术研究
短句来源
     The mean tissues' carbon content rates of conifer species were higher than broadleaf species by 1 6%~3 4%, and the carbon content rates of conifer stands were also higher than the broadleaf stands.
     针叶树种器官的平均含碳率普遍比阔叶树种平均高 1 6 %~ 3 4% ,相应的针叶林分的平均含碳率也高于阔叶林
短句来源
     Study on Early Growth Performance of 11 Local Broadleaf Species in West of Guangdong
     11个阔叶树种在粤西地区的早期生长表现
短句来源
     Accord-ing to the analysis of feasibility, this paper presents that about 88species of evergreen broadleaf trees, including 13 species of ar-bors, 35 species of shrubs, 12 species of woody vines, and 28 spe-cies of bamboos, can be used in park greening in Shandong prov-ince.
     通过对常绿阔叶树种在山东园林中应用可行性的分析,提出了适于山东园林中应用的常绿阔叶树88种,包括常绿乔木和小乔木13种,常绿灌木35种,常绿藤本12种,竹类植物28种。
短句来源
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  宽叶
     Phenylurea herbicide belongs to an important class of contact herbicides that have been used for pre- and post-emergence control of annual grass, and many broad leaf weeds in many crops acting by inhibition of photosynthesis.
     苯脲类除草剂作为一类重要的除草剂,广泛应用于不同农作物的芽前和苗后的一年生杂草,特别是一年生宽叶杂草。
短句来源
     Secondly,the root yield of the broad leaf type and the long leaf type was higher than that of the medium leaf type,and especially the root yield of broad leaf type was 2 times higher than that of the medium leaf type.
     宽叶型和长叶型根产量也明显高于中间型,特别是宽叶型根产量是中间型的2倍以上;
短句来源
     Thirdly,the content of thing lixiviated by ethanol in the root of 3 types of Bupleurum chinense was higher than the standard of the Chinese Traditional Medicine Codex,and the yield of thing lixiviated by ethanol in the one plant root of broad leaf type and long leaf type was higher than that of the medium leaf type.
     3种柴胡类型的乙醇浸出物含量均高于药典标准,并且宽叶型和长叶型单株乙醇浸出物产量高于中间型。
短句来源
     The broad leaf Bupleurum chinense and the long leaf Bupleurum chinense were two excellent resources worthy of further research and use in Bupleurum chinense populations.
     宽叶型和长叶型柴胡是值得深入研究利用的柴胡优良种质资源。
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  broadleaf
Although the habitat composition of the core area varied greatly for individuals, a large part of the habitats used were composed of confier and broadleaf mixed forests, masson pine forests, fir forests, and shrubs.
      
The whole area was divided into ten land cover types: conifer forest, broadleaf forest, mixed forest, shrub, brushwood, meadow, farmland, built-up, water body and bare land.
      
Broadleaf species (aspen and birch) proved to have lower rates of N2O consumption compared to coniferous species.
      
The replacement of coniferous forests with broadleaf trees will double the N2O/N2 ratio in the denitrification end-products.
      
Currently, the habitat of this species is confined to mature broadleaf forests in the Right Bank Saratov Region; in the Khopyor and Medveditsa Valleys, its breeding range extends to 51°40'N.
      
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Through the study of genitalia and proventriculus, as well as the external morpho-logy of the genus Scolytus Geoffr. which is the only genus of the family Scolytidae(s. str.) now found in China, we suggest the revised classification with keys to subgeneraand species-groups as follows: Key to subgenera of Scolytus Geoffr.1(4) Penis without seminal valve ("Rinne", Nusslin), terminal opening of the penis body not ventrad, pro- ventricular plate narrower, teeth of the plate smaller.2(3) Dividing line between first...

Through the study of genitalia and proventriculus, as well as the external morpho-logy of the genus Scolytus Geoffr. which is the only genus of the family Scolytidae(s. str.) now found in China, we suggest the revised classification with keys to subgeneraand species-groups as follows: Key to subgenera of Scolytus Geoffr.1(4) Penis without seminal valve ("Rinne", Nusslin), terminal opening of the penis body not ventrad, pro- ventricular plate narrower, teeth of the plate smaller.2(3) Dividing line between first and second abdominal segment prominent and somewhat elevated at the side. . . . . . . . . . . . . . . . . . .Scolytus s.str.3(2) Dividing line between 1st & 2nd abdominal segment indistinct at the side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Confusoscolytus Tsai et Hwang, n. subgen.4(1) Penis with seminal valve, terminal opening ventrad, proventricular plate broader, with larger and pointer teeth. The dividing line between 1st & 2nd abdominal segment indistinct. . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . Rugulosocolytus Butov. Key to species-groups of Scolytus Geoffr. I. Subgen. Scolytus s. str.1(4) Penis without end plate, terminal opening dorsad, with a plug process at the base or middle of the 2nd abdominal segment, rarely wanting (e. g.: S. butovitschi Stark ? & S. pygmaeus F.)2(3) Strial punctures similar to the interstrial punctures of the elytra, penis body slender symmetrically, without special process near the end, apical orifice sometimes heart-shaped, Hind margin of 8th ster- nite (?) with hairs. . . . . . . . . .Archaeoscolytus(Butov.) Tsai n. comb. (=Archaeoscolytus Butov.+ Spinuloscolytus Butov.)3(2) Strial punctures differ from the interstrial punctures. Penis body twisted asymmetrically, apex en- larged, capitate. Hind margin of the 8th sternite (?) without hairs. . . .Pygmaeoscolytus Butov.4(1) Penis with end plate, terminal opening not dorsad, 2nd abdominal segment without process.5(6) Lateral punctures of pronotum rougher than the dorsal, sometimes to come into contact with each other, strial punctures of elytra similar to interstrial punctures. Penis body closed dorsally, tubiform. Spicule ("Stengel", Lindemann) without lateral barb ("Seitenzahn", Butov.). . . .Tubuloscolytus Butov.6(5) Lateral punctures of pronotum fine, separately, strial punctures of elytra are larger than those of interspaces. Penis body opened dorsally, furrow shaped, lateral edges dilated at the middle, sometimes triangular in form. Spicule with a lateral barb. . . . . . . . . .Scolytus s. str. Ⅱ. Subgen. Confusoscolytus Tsai et Hwang1(1) Penis without end plate, nor seminal valve, Penis body opened dorsally, furrow shaped, apex conical.Frontal surface longitudinally aciculated. Size small (1.5-2 mm.) . ..Confusoscolytus s.str. Ⅲ. Subgen. Ruguloscolytus Butov.1(4) Seminal valve connected with seminal rod ("Rinnenstabchen", Butov.) sensory clasper ("Geschlechts- taster", Butov.) obsolete, penis body with lateral hairs or setaceus papillules.2(3) Frontal surface granulated, Host: conifers. . . . . . . . .Pinetoscolytus Butov.3(2) Frontal surface longitudinally aciculated, Host: conifers or broadleaf trees. . . . . . . . . . . . . . . . . . . . . . . .Pinetoruguloscolytus Tsai et Hwang, n. sp. gr.4(1) Seminal valve separated with the rod, sensory clasper developed, penis body without lateral hairs nor papillules, Frontal surface longitudinally aciculated, Host: broad-leaf trees. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Raguloscolytus s. str. Scolytus (Rugaloscolytus) sinopiceus Tsai, n. sp. (P1 Ⅰ:12; Ⅱ:11; Ⅲ:12; Ⅳ:3, 7-8;Ⅴ:4-6) Length: 3.7-4.9mm., grayish black, shining; head, pronotum, scutellum, ventralside of thorax and abdomen black. Elytra dark ferruginous, with black margins anddarker apices; antennae and tarsi grayish brown; hind margin of abdominal segmentslight pale. Body with long hairs, hairs of head and thorax grayish black, those of elytraand abdomen pale yellow; tibial hairs grayish. Male frons concave, extending near the hind margin of the head, s

根据我国产小蠹科目前所知唯一的属:小蠹属 Scolytus Geoffr.的外生殖器,前胃及外部形态研究结果,把该属分设三亚属:Scolytus.s. str.;Confusoscolytus (新亚属)及Ruguloscolytus Butov.和八个种团:Archaeoscolytus(新租合);Pygmaeoscolytus Butov.;Tubuloscolytus Butov.;Scolytuss.str.;Confusoscolytus s. str.(新种团);Pinetoscolytus Butov.;Pinetoruguloscolytus(新种团);及 Ruguloscolytus s.str.Butov.。 详细研究了我国产小蠹属14种以后,发现两新种:云杉小蠹 Scolytus sinopiceus和栒子木小蠹Sco-lytus abaensis 均产于川西阿坝藏族自治州米亚罗林区,在分类系统上与日本小蠹 Scolytus. japonicus合成一个新种团:Pinetoruguloscolytus。形成东方产特有的类群。此外对于若干种类在分类系统上作了更正,例如 S.schevyre...

根据我国产小蠹科目前所知唯一的属:小蠹属 Scolytus Geoffr.的外生殖器,前胃及外部形态研究结果,把该属分设三亚属:Scolytus.s. str.;Confusoscolytus (新亚属)及Ruguloscolytus Butov.和八个种团:Archaeoscolytus(新租合);Pygmaeoscolytus Butov.;Tubuloscolytus Butov.;Scolytuss.str.;Confusoscolytus s. str.(新种团);Pinetoscolytus Butov.;Pinetoruguloscolytus(新种团);及 Ruguloscolytus s.str.Butov.。 详细研究了我国产小蠹属14种以后,发现两新种:云杉小蠹 Scolytus sinopiceus和栒子木小蠹Sco-lytus abaensis 均产于川西阿坝藏族自治州米亚罗林区,在分类系统上与日本小蠹 Scolytus. japonicus合成一个新种团:Pinetoruguloscolytus。形成东方产特有的类群。此外对于若干种类在分类系统上作了更正,例如 S.schevyrewi Sem.,S.dahuricus Chap.,S.japonicus Chap.及 S.confusus Egg.等均有了新的系统地位。对于若干种类学名的误订和有同物异名者,亦一一作了修正,详见本文国产种类纪要一节。

The materials of present report were collected from reconnaissence soil survey of Kwangtung and Kwangsi provinces in 1958—1960. Soils investigated include yellow earths, red earths and lateritic soils. They are developed under natural vegetations of tropic monsoon forest (secondary), subtropic evergreen broadleaf forest, conifer and broadleaf mixed forest, subalpine dwarfing and bamboo ferests, confer forests of Cunninghamia lanceolata and Pinus massoniana, and grass land. A few samples of rice paddy...

The materials of present report were collected from reconnaissence soil survey of Kwangtung and Kwangsi provinces in 1958—1960. Soils investigated include yellow earths, red earths and lateritic soils. They are developed under natural vegetations of tropic monsoon forest (secondary), subtropic evergreen broadleaf forest, conifer and broadleaf mixed forest, subalpine dwarfing and bamboo ferests, confer forests of Cunninghamia lanceolata and Pinus massoniana, and grass land. A few samples of rice paddy soil were also studied for comparison. Laboratory investigations invplved the determination of chemical composition of forest litters, fraction of soil humus (after Turin and Kononova), and analysis of soil exchangeable bases, active iron and alumina, etc. From the results obtained the writers come to the following conclusions: 1. The ratios of humic acid over fulvic acid under natural vegetations are usually less than 1. Fulvic acid prevails in acid soils of tropic and subtropic regions with the presence of active iron and alumina. On the contrary, intensively cukivated paddy soils of neutral to slightly alkaline reaction in the same areas, after a long-time application of lime and manures, give a humic acid over fulvic acid ratio of about 2. 2. Active soil humus, including humic and fulvic acid extractable by 0.1 N NaOH (Fraction Ⅰ), also predominates in soil organic matter. The ratio of soil humus "Fraction 1" over "Fraction Ⅱ, including humic acid and fulvic acid only soluble through repeatedly extraction by 0.1 N H_2SO_4 and NaOH", ranges from 5:1 to 10:1. 3. Soils developed under natural vegetations contain 20—35% of readily soluble humus {extractable by 0.05 N H_2SO_4) in total organic matter. Rice paddy soils in the same area usually contain readily soluble humus less than 5%. It appears that under present agricultural practices, the more active forms of soil humus undergo rapid decomposition, and the maintenance of soil fertility is largely dependded on manures and nitrogenous fertilizers. 4. Soils of the investigeted areas contain 40—50% humin (residual organic matter resistant 1.0 acid and alkaline extraction) in total organic matter. 5. Soil litters of conifer forest of Cunninghamia lanceolate contain CaO+Mg+K_2O+Na_2O up to 59.51% and SiO_2 10.57% in the ash. Litters of bamboo forest contain CaO+MgO+K_2O+ Na_2O 8.87% and SiO_2 up to 78.21% in the ash. Litters of Pine massoniana contain CaO+MgO + K_2O+Na_2O 11.18% and a very high content of A1_2O_3 (13.91%). The present data, however, give no correlation between the chemical composition of soil litter and that of soil exchangeable bases. Soils under Pine massoniana contain relatively greater amounts of exchangeable alumina (4—16 m.e./100 gm. of soil) and active iron (65—200 m.e./100 gm. of soil) in surface layer.

本文对华南地区不同植被下的土壤有机貭、土壤活性矿物貭組成及枯枝落叶层进行了研究,企图探求植被类型对于土壤腐殖貭組成以及肥力变化的影响。供試土壤包括山地草甸土、黃壤、紅壤及砖紅壤性紅壤,由不同母貭发育而成。植被类型包括常綠闊叶林、針叶闊叶混交林、高山矮林及竹林、杉木林、馬尾松灌丛、草坡等。此外,还选了三个珠江三角洲地区不同肥力的水稻土,以比較自然植被下土壤性貭和农田土壤性貭的异同。根据初步研究結果,获得下列几点认識。 1.土壤活性腐殖质的变化两广地区自然植被下的土壤,其活性腐殖貭占土壤有机貭总量的百分比显然高于农田土壤。森林及以禾本科为主的中生性草地下的土壤,表土有机貭中合有約20—35%的活性腐殖貭(为0.1 N NaOH所能提取),但是水稻土中,通常只占6%以下。这点說明了在热带和亚热带地区的生物气候条件下,一年2—3造的耕作制度,可使結构比較簡单的活性腐殖貭很快的被矿化,而土壤肥力的維持在很大程度上依賴于有机肥料和化学肥料的逐年补給。 2.土壤中胡敏酸与富里酸的比率华南自然植被下的土壤有机貭中,胡敏酸与富里酸的比率通常小于1,紅壤地区土壤中富里酸比胡敏酸高的特点,是由于富里酸能在酸性溶液中和活性R_2O_...

本文对华南地区不同植被下的土壤有机貭、土壤活性矿物貭組成及枯枝落叶层进行了研究,企图探求植被类型对于土壤腐殖貭組成以及肥力变化的影响。供試土壤包括山地草甸土、黃壤、紅壤及砖紅壤性紅壤,由不同母貭发育而成。植被类型包括常綠闊叶林、針叶闊叶混交林、高山矮林及竹林、杉木林、馬尾松灌丛、草坡等。此外,还选了三个珠江三角洲地区不同肥力的水稻土,以比較自然植被下土壤性貭和农田土壤性貭的异同。根据初步研究結果,获得下列几点认識。 1.土壤活性腐殖质的变化两广地区自然植被下的土壤,其活性腐殖貭占土壤有机貭总量的百分比显然高于农田土壤。森林及以禾本科为主的中生性草地下的土壤,表土有机貭中合有約20—35%的活性腐殖貭(为0.1 N NaOH所能提取),但是水稻土中,通常只占6%以下。这点說明了在热带和亚热带地区的生物气候条件下,一年2—3造的耕作制度,可使結构比較簡单的活性腐殖貭很快的被矿化,而土壤肥力的維持在很大程度上依賴于有机肥料和化学肥料的逐年补給。 2.土壤中胡敏酸与富里酸的比率华南自然植被下的土壤有机貭中,胡敏酸与富里酸的比率通常小于1,紅壤地区土壤中富里酸比胡敏酸高的特点,是由于富里酸能在酸性溶液中和活性R_2O_3相結合(特別是活性鉄),这項特性在邱林、科諾諾娃、波諾馬列娃等人的研究中早已証明了。珠江三角洲上的高度熟化水稻土(土壤pH7.8),由于长期施用有机肥料及石灰的影响,有机貭中胡敏酸的数量高出富里酸一倍,胡敏酸与富里酸的比率为1.95。但是在新垦的紅壤性水稻土中(土壤pH4.5),这項比率是0.39,这点也可以証明有机貭分解过程和富里酸的形成是和土壤酸度及活性鉄、鋁有关的。 3.活性铁和鋁与腐殖质組成的关系本区一般森林及草本植被下的土壤,表土活性鋁的合量通常为每百克土4—10毫克当量,活性鉄为20—100毫克当量;馬尾松灌丛下的紅壤,活性鋁的含量每百克土可达20毫克当量左右。这些土壤的盐基飽和度一般在20—30%之間,每百克土的代換性鈣通常仅在1—2毫克当量上下,但是土壤有机貭分組分析結果,第一組腐殖貭(包括活性較強的胡敏酸和富里酸)的含量远远超过了第二組腐殖貭(指由酸液和碱液反复提取以后能溶解的部分),它們的比率为5:1和10:1(只有一个例外)。这項結果說明土壤中大量活性鋁离子和鉄离子的存在,使腐殖貭的活度增強。在珠江三角洲水稻土中,第一組腐殖貭和第二組腐殖貭的比例也在这个范围內。 4.土壤腐殖貭中的不溶性殘渣(胡敏素)的含量在表土中所有供試土壤都很一致,約占土壤腐殖貭总量的40—50%上下。植被类型、海拔高度、耕作过程、成土母质等对于胡敏素的合量,均沒有明显的影响。这样在热带和亚热带土壤的腐殖貭中,似乎有一半是胡敏素,它在短期內是不能矿化的。 5.土壤腐殖貭中的碳氮比率(C/N) 森林及草本植被下的表土腐殖貭中,其C/N比率通常在10—15左右,只有馬尾松灌丛下的紅壤,C/N比率为19.6。在这个地区的水稻土中C/N比率一般为9—11。耕作縮小了C/N比率,但是自然植被下有机貭中活性腐殖貭的含量,都远远地超过农田土壤,因此,碳氮比率的縮小,很难认为土壤有机貭中氮素有效性的提高。这在国內外的研究材料中也指出过,例如合胡敏素极高的泥炭和褐煤,其C/N比率可以在10以下。 6.不同植被下殘落物的灰分組成杉木林的殘落物合有最高的基性物貭,CaO+MgO+K_2O+Na_2O的总量占灰分的59.51%;竹林和馬尾松灌丛的殘落物合基性物貭最低,前者为8.87%,后者为11.18%(都是CaO、MgO、K_2O、Na_2O的总量)。竹林殘落物的灰分中含SiO_2高达78.21%,而杉木林的殘落物灰分中含SiO_2量最低,为10.57%。馬尾松灌丛及亚热带針闊叶混交林下的殘落物灰分中含Al_2O_3高于其他植被的殘落物,为13.91%5及12.86%。其他一般的常綠闊叶林、針闊叶混交林和亚高山矮林等殘落物灰分中的基性物貭总量均在30%左右。虽然不同植被类型地表殘落物的矿貭組成有明显的差异,但就現在的初步材料,远远不足以闡明这項差异在生物物貭循环过程中的作用。这些成分上的变化,对于土壤活性矿物貭很少有直接的相关性。只有馬尾松灌丛下的紅壤,其活性鋁含量高于一般土壤,这点可能是受了殘落物貭腐解体的影响。我們初步接触了华南地区的植被类型、土壤腐殖貭組成和活性矿物貭間相互关系的問題以后,觉得波雷諾夫所启示我們的生物地球化学的研究方向,在这一地区中有許多工作可以推进。这項研究方法如果进一步地应用于农田土壤中的輪作方式及耕作措施对于土壤肥力消长关系的研究,便可以把森林和草地土壤以及农田土壤的生成发育方向做出具体的比較。此外,我們感到,尽管邱林、科諾諾娃和瓦克斯曼(Waksman,S.A.)等近三十年来在土壤有机貭的研究上做了很多工作,但是目下的有机貭分級方法应用于热带及亚热带的土壤(特别是水稻土)的适应性还值得研究。至于胡敏酸、富里酸等在土壤中与活性矿物貭的結合情况,以及各种腐殖貭物貭对于土壤肥力及植物营养上的作用,更是一个急待进一步研究的問題。

The broad-leaf evergreen forest is the most important primary vegetation type of subtropical region in China. Chekiang province is one of the main provinces in which this type distributes. On the basis of investigations of broad-leaf evergreen forest of five places in that province the features of it's floristic composition, physiognomy and structure are generalized. In this paper, first of all we describe the environmental conditions, under which the broad-leaf evergreen forest is located. It is explained,...

The broad-leaf evergreen forest is the most important primary vegetation type of subtropical region in China. Chekiang province is one of the main provinces in which this type distributes. On the basis of investigations of broad-leaf evergreen forest of five places in that province the features of it's floristic composition, physiognomy and structure are generalized. In this paper, first of all we describe the environmental conditions, under which the broad-leaf evergreen forest is located. It is explained, the broad-leaf evergreen forest is a characteristic vegetation type which have developed under the condition of subtropical monsoon climate of East Asia. According the notes of 21 plots from five places in the broad-leaf evergreen forest of Chekiang province about 428 species of vascular plant were calculated, which belong to 105 families and 225 genera. In the dicotyledonous plants the species of Fagaceae, Lauraceae and Theaceae families are abundent, they are all fundamental components of tree layer. The dominants of community are concentrated on a few genera such as Castanopsis, Lithocarpus, Cyclobalanopsis, Quercus, Camellia Eurya, Machilus, Cinnamomum, Lindera, Litsea, Rhododendron, Photinia and Prunus. In addition, the geographical elements of flora in broad-leaf evergreen forest were analysed. It was told, that they have a tight connexion with the tropical flora, especially have a common history in a long peroid with the tropical flora of South-East Asia. The high percentage of genera distrubuting in temperate zone and East Asia is one of the features of broad-leaf evergreen forest in the east part of China. A large number of endemic species of subtropic in China further expresses that the broadleaf evergreen forest is a distinct type in the subtropical region of China.

文章根据对浙江省五个地点的常绿阔叶林的调查,对其种类成份、外貌和结构的特征,作了汇总分析。在本文中,首先讨论了常绿阔叶林所在的环境条件,说明我国常绿阔叶林是在东亚亚热带季风气候条件下孕育的一种特殊的植被类型。根据五个地点21个样地的统计,组成浙江常绿阔叶林的维管束植物共约428种,分属于105科,225属。在双子叶植物中壳斗科、樟科、山茶科的种类最多,它们均是构成林木层的基本成份。群落的优势种集中在少数的属中。如壳斗科的Castanopsis,Lithocarpus,Cyclobalanopsis,Quercus,山茶科的Camellia,Eurya,以及樟科的Machilus,Cinnamomum,Lindera,Litsea和杜鹃花科的Rhododendron以及蔷薇科的Photinia和Prunus等。同时还分析了常绿阔叶林区系的地理成份,分析表明它们与热带区系有着密切联系,尤其是与热带东南亚植物区系存在着较悠久的共同历史。温带、东亚分布类型的属的较高比例是我国东部亚热带常绿阔叶林的特征之一。中国亚热带特有种类的大量存在进一步表明了常绿阔叶林是我国亚热带地区的一种特有类型。

 
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