助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   马尾松 在 自然地理学和测绘学 分类中 的翻译结果: 查询用时:0.449秒
图标索引 在分类学科中查询
所有学科
自然地理学和测绘学
林业
轻工业手工业
有机化工
植物保护
生物学
农业基础科学
环境科学与资源利用
农艺学
更多类别查询

图标索引 历史查询
 

马尾松
相关语句
  masson pine
    RESEARCH ON NUTRIENT STATUS OF PURE CHINESE FIR, MASSON PINE, SCHIMA SUPERBA AND MIXED FORESTS
    杉木、马尾松、木荷纯林及其混交林的土壤养分状况
短句来源
    A STUDY ON SOIL EROSION IN MASSON PINE YOUNG STAND
    马尾松幼龄林地水土流失的研究
短句来源
    In the humid Nanling mountains area, the influence of soil non-capillary porosity was more effective than that of total porosity on Chinese Fir and Masson Pine's growth, and for the purpose of fine growth of the trees, their proportion must be appropriate.
    在湿润的南岭山地,非毛管孔隙度对杉木、马尾松生长的影响远比总孔隙度大,同时林木要求土壤的非毛管孔隙度占总孔隙度的比例要适当。
短句来源
    The results indicated that the effect of mixed masson pine and oak forest on soil amelioration was the best,that of grass was the second and the pure masson pine forest was the worst.
    结果表明:松栎混交林对土壤的改良效果最好,草地次之,马尾松纯林则较差。
短句来源
    Contents of microelements in broadleaved forest floors were higher than those in Chinese fir floors,the latter higher than those from Loblolly pine,and those from Masson pine were the lowest.
    杉木林枯落物各元素含量中等,火炬松除个别元素外一般均较低,马尾松为最低,但枯落物层现存贮量最高。
短句来源
更多       
  “马尾松”译为未确定词的双语例句
    Effect of Ectomycorrhizal Fungi on the Activities of Enzymes in Soil
    外生菌根真菌侵染马尾松土壤酶活性变化研究
短句来源
    The results were as follows:1. The height, diameter and dry weight of the seedlings of Pinus Massoniana that inoculated with Ld (Ld 01 and Ld 03), Sp 504 and Lb 238N were significantly increased comparing with CK(p=0.05).
    1.用松乳菇(Lactarius delicious)、华南牛肝菌(Suillus placidu 504)和双色蜡蘑(Laccariabicolor Lb 238N)三种外生菌根真菌侵染马尾松幼苗根系后,马尾松幼苗的株高、地径和干重比对照有明显的增加,差异显著(p=0.05),其中在株高方面,以Ld01最突出,增加了45.91%;
短句来源
    2.The contents of nutrients (N, P, K) in seedlings changed, to some extent, after inoculated with ectomycorrhizal fungi.
    2.接种外生菌根真菌后,马尾松幼苗中N、P、K养分含量都有一定的变化。 其中N含量变化均不明显;
短句来源
    The results showed that: Mean amounts of water runoff of Pinus massoniana young plantation with overall preparation, strip preparation and hole preparation was 1348.50 t/hm 2\5a, 1138.39 t/hm 2\5a and 1094.91 t/hm 2\5a respectively.
    结果表明:不同整地马尾松工程幼林地的年平均液体径流量为全垦(134850t/hm2)>带垦(113839t/hm2)>穴垦(109491t/hm2);
短句来源
    The results showed that Pinus massoniana engineering young plantation with hole preparation(40cm×40cm×30cm) has obvious soil and water conservation effects.
    结果表明,穴垦整地(40cm×40cm×30cm)马尾松工程幼林地具有显著的水土保持效益。
短句来源
更多       
查询“马尾松”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  masson pine
Organic acid exudation from the roots of Chinese fir (Cunninghamia lanceolata) and Masson pine (Pinus massoniana) seedlings under low phosphorus stress was studied using the solution culture method.
      
The results revealed that organic acid exudation from the roots of Chinese fir and Masson pine seedlings under low phosphorus stress increased.
      
Compared with P3 (KH2PO4, 0.5 mmol/L), the average organic acid exudation from the root of Masson pine seedlings under P0 (KH2PO4, 0 mmol/L), P1 (KH2PO4, 0.03 mmol/L) and P2 (KH2PO4, 0.09 mmol/L) increased by 328.6%, 267.9% and 126.4% respectively.
      
Masson pine from Zhejiang Province in China had the highest organic acid exudation.
      
Under low phosphorus stress, the increase in organic acid exudation from the different provinces of Chinese fir and Masson pine varied.
      
更多          


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...

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 artificial forests existing in southern subtropical China consist chiefly of China fir and pines. Continuous reforestation of coniferous trees has resulted in the deterioration of soil conditions and decreased the production of forestry. For improvement of the forest soil and production of forestry, a three-year location experiment on material cycling of the establishing artificial forests of Cunninghamia lanceolata, Pinus massoniana, Schima wallichii and Erythrophloeum fordii on lateritic red earth in Nanning...

The artificial forests existing in southern subtropical China consist chiefly of China fir and pines. Continuous reforestation of coniferous trees has resulted in the deterioration of soil conditions and decreased the production of forestry. For improvement of the forest soil and production of forestry, a three-year location experiment on material cycling of the establishing artificial forests of Cunninghamia lanceolata, Pinus massoniana, Schima wallichii and Erythrophloeum fordii on lateritic red earth in Nanning was conducted. Results of the experiment showed that the four types of forest trees differed from each other both in characteristics of biological material cycling and in amounts of litter. The mean annual amount of litter of coniferous trees was less than 4t/ha, whereas that of broad leaf trees such as Schima wallichii and Erythrophloeum fordii was more than 6.3t/ha. In litter coniferous trees, Ca, Mg and Si as its essential nutrient elements, made up 60—80% of total ash、 these elements being usually no tlacking in soil itself, while the litter of broadleaf trees contained considerable amounts of N, P and K in addition to Ca, Mg and Si. Each year, China fir returned to the soil 118.5 kg of ash and nitrogen per hectare in the form of litter, Pinus massoniana 79.5 kg/ha, Schima wallichii 168.1 kg/ha, and Erythrophloeum fordii 304.8 kg/ha. The litter of woods played a significant role in promoting water-retention ability of soil. It was estimated that the mean annual water-retention capacity of the litter under China fir, Pinus massoniana, Schima wallichii, Erythrophloeum fordii was 1.5t/ha, 1.8t/ha, 2.5t/ha, 3.2t/ha respectivety. Effect of different forest trees on both number and dominant species of micro-organisms in soil was distinct; it for example, although in the soils under coniferous trees, there were the highest contents of fungi actinomyces and bacteria; in the soil under broad leaf trees, there was the highest amount of mierobial biomass. At the same time, the variety and activity of soil enzymes were also influenced by different forest trees. It is indicated that broad leaf forests are litter in improvement of physical and chemical properties of soil and promotion of soil productivity, as compared with coniferous forests, therefore, the development of mixed forest of coniferous trees that provide timbers and broadleaf trees than can improve soil condition is a important measure for development of forestry in south China.

通过对杉木、马尾松、红荷木、格木四种人工林的三年定位研究,初步获得了四种林木对主要营养元素的生物吸收和归还特点、对土壤养分状况、水分状况、微生物状况和土壤酶活性的影响等一系列资料。初步阐明了四种林木凋落物的数量及主要营养元素含量,研究了四种林木凋落物的分解特点。从而为进一步研究林木混交提供了科学依据。研究表明,阔叶树种与针叶树种相比,在改善土壤理化性状、提高土壤生产力等方面都表现出明显的优点。

It was proved that vegetational types have close relation with the movement and transfer of mineral elements in the red soil hill ecos- ystem through 4 plots,which were consisted of pine(Pings massoniana), maple(Liquidambar formosana),bare ground and control(natural secondary forest),with an area of 20m×10m from 1983 to 1986.The total loss of N,P,K,Ca,Mg,Fe,Mn,Zn,and Cu elements,which was 2.980kg/ha, from the control was the least of all plots and it was 1.3,5.4,and 6.2 percent of the loss from the other three...

It was proved that vegetational types have close relation with the movement and transfer of mineral elements in the red soil hill ecos- ystem through 4 plots,which were consisted of pine(Pings massoniana), maple(Liquidambar formosana),bare ground and control(natural secondary forest),with an area of 20m×10m from 1983 to 1986.The total loss of N,P,K,Ca,Mg,Fe,Mn,Zn,and Cu elements,which was 2.980kg/ha, from the control was the least of all plots and it was 1.3,5.4,and 6.2 percent of the loss from the other three plots in 1986. However,there were the most amount of accumulation,remainder, return and absorbtion of these elements except N from the control plot and second one was produced in the bare ground.Their returned amount were 0.608,11.275,and 39.776kg/ha from the control,pine and maple plots. And the obsorbing ones were similar to their returned amounts.There also was the most of the total obsorbing on these elements which reached 94.369kg/ha in the same year in the control,which was 6.8 times in the pine and 2.3 times in the maple plots.It is suggested to protect natural vegetation and plant mixed forest with broad-leaved and coniferous trees.

从1983~1986年,通过江西泰和县千烟州不同森林植被及裸地的小区实验,证明红壤丘陵生态系统矿质元素的迁移与植被类型紧密相关。天然次生林中氮、磷、钾、钙、镁、铁、锰、锌和铜等9种元素在1986年的流失量最少,仅2.970kg/ha,为裸地的1.3%,是同期人工种植的马尾松和枫香幼林的5.4%~6.2%。但是,矿质元素的积累、留存、归还与吸收量以天然次生林最高,人工幼林年吸收量类似归还量。对照样地的吸收量达94.369kg/ha,分别是两块人工幼林样地吸收量的6.8倍和2.3倍。提倡封山育林和营造针阔混交林。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关马尾松的内容
在知识搜索中查有关马尾松的内容
在数字搜索中查有关马尾松的内容
在概念知识元中查有关马尾松的内容
在学术趋势中查有关马尾松的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社