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沙地灌木     
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  shrubs on sandy land
     Reviews on Water Physiological Characters of Shrubs on Sandy Land
     沙地灌木水分生理特征综述
短句来源
  desert shrub
     Field studies of gas exchange and chlorophyll fluorescence of three desert shrub species,Hedysarum fruticosum var. mongolicum,Artemisia ordosia and Salix pasmmophylla, showed different patterns under different leaf temperature (T_ leaf) and incident photosynthetic photon flux density (PPFD) regimes.
     比较研究了 3种沙地灌木羊柴 (H edysarum fruticosum var.mongolicum)、油蒿 (Artemisia ordosia)和沙柳(Salix pasmmophylla)在适宜光照和温度 (春季 )以及高温强光 (炎热的夏季 )的光合气体交换特点。
短句来源
  “沙地灌木”译为未确定词的双语例句
     THE CHARACTERISTICS OF THE FLORA OF THE SHRUB RESOURCE IN MAOWUSU SANDLAND AND THECOUNTERMEASURES FOR THEIR PROTECTION
     毛乌素沙地灌木资源区系特征及其保护对策
短句来源
     A PRELIMINARY STUDY ON THE WATER BALANCE FOR SOME SANDLAND SHRUBS BASED ON TRANSPIRATION MEASUREMENTS IN FIELD CONDITIONS
     依据野外实测的蒸腾速率对几种沙地灌木水分平衡的初步研究
短句来源
     THE STATUS QUO OF SHRUB SPECIES UTILIZATION AND DEVELOPMENT COUNTER-MEASURE IN NENJIANG SANDY LAND
     嫩江沙地灌木资源开发利用现状及发展对策
短句来源
     Study on ecological effects of several shrubs on sandy soils in Horqin Sandy Land
     科尔沁沙地灌木对风沙土壤的生态效应
短句来源
     At the same time, put forward suggestions and countermeasures against devoloping shrub resouces.
     针对嫩江沙地灌木开发利用存在的问题提出了3项对策和建议:①结合三北防护林体系建设和治沙工程建设大力营造灌木饲料林和薪炭林;
短句来源
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  相似匹配句对
     Reviews on Water Physiological Characters of Shrubs on Sandy Land
     沙地灌木水分生理特征综述
短句来源
     TECHNOLOGY OF BREEDING AND CULTURING SAND SHRUB
     沙地适生灌木繁殖栽培技术
短句来源
     STUDIES ON THE CHARACTERISTICS OF SWEAT IN THE SAND-DUNES OF DESERT AREAS,CENTRAL KANSU
     沙地凝结水特征
短句来源
     Koyama Spruce Tells the History
     沙地云杉话沧桑
短句来源
     The study on shrub drought resistance mechanism
     灌木抗旱机理研究
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  desert shrub
Tissue cultures were established from stem explants of Calotropis procera, a hydrocarbon yielding desert shrub on Murashige and Skoog's medium supplemented with 1.5 mg.
      
A field study was conducted to monitor the effect of different desert shrub ecophysiological adaptations on the composition, size, and diversity of soil free-living amebae.
      
Carbon balance, productivity, and water use of cold-winter desert shrub communities dominated by C3 and C4 species
      
The energy balance of leaves of the evergreen desert shrub Atriplex hymenelytra
      
Influence of summer rainfall on root and shoot growth of a cold-winter desert shrub, Atriplex confertifolia
      
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The Nenjiang sandy land is rich in uncultivated sandy land resources. this paper deals with the importance of developing shrub resources including Hedysarum scoparium, Caragana microphylla, Elaeagnus angustifolia. At the same time, put forward suggestions and countermeasures against devoloping shrub resouces. fourteen species of shrub species were selected on the basis of trials.

黑龙江省沙区具有丰富的有待开发的土地资源,从树种选择出发,论述了开发灌木资源的重要意义;筛选出了花棒、小叶锦鸡儿、白锦鸡儿、沙枣等14个适生树种;针对嫩江沙地灌木开发利用存在的问题提出了3项对策和建议:①结合三北防护林体系建设和治沙工程建设大力营造灌木饲料林和薪炭林;②建立沙生灌木种苗基地,加快沙地治理进程;③政策引路,加大灌木资源的发展力度。

Field studies of gas exchange and chlorophyll fluorescence of three desert shrub species,Hedysarum fruticosum var. mongolicum,Artemisia ordosia and Salix pasmmophylla, showed different patterns under different leaf temperature (T_ leaf) and incident photosynthetic photon flux density (PPFD) regimes. The leaves of both Hedysarum and Artemisia exhibited higher P_N and g_s than was observed in Salix, especially under the very high T_ leaf (>46 ℃) and high PPFD (>2100 μmol·m -2·s -1) of the hot summer period....

Field studies of gas exchange and chlorophyll fluorescence of three desert shrub species,Hedysarum fruticosum var. mongolicum,Artemisia ordosia and Salix pasmmophylla, showed different patterns under different leaf temperature (T_ leaf) and incident photosynthetic photon flux density (PPFD) regimes. The leaves of both Hedysarum and Artemisia exhibited higher P_N and g_s than was observed in Salix, especially under the very high T_ leaf (>46 ℃) and high PPFD (>2100 μmol·m -2·s -1) of the hot summer period. An observed decrease in P_N through the course of the day was largely associated with stomatal closure. However,P_N of Salix leaves continued to be seriously depressed by high temperatures from midday through to evening,as shown by the negative P_N values in the hot summer period,and no such depression was observed in the spring. The maximal photochemical efficiency of PSII (F_v/F_m) of Salix was lowest at 16∶00,indicating the inhibition of PSII by heat. In summer,all three shrub species showed a pronounced midday depression in P_N and g_s,while in spring they showed a single-peaked response and the initial summer peak appeared 2 h earlier than the spring peak in all three species. High temperatures led to this difference in patterns of gas exchange and the serious depression of P_N in Salix. Our results clearly showed that Hedysarum and Artemisia were much more tolerant to heat and high irradiance than was Salix, which fixed most of its CO_2 during its spring fast growth stage. Nevertheless,in summer it had to survive severe hot stress through strong respiration,and the storage of CO_2 in the early morning.

比较研究了 3种沙地灌木羊柴 (H edysarum fruticosum var.mongolicum)、油蒿 (Artemisia ordosia)和沙柳(Salix pasmmophylla)在适宜光照和温度 (春季 )以及高温强光 (炎热的夏季 )的光合气体交换特点。前两种灌木为自然分布的种类 ,后一种为人工插条栽植的种类。瞬时光合有效辐射 (PPFD)、叶面温度 (Tleaf)、净光合速率 (PN)、光系统 II最大量子产率 (Fv/ Fm)等参数每隔 2 h进行 1次测量。羊柴和油蒿分别比沙柳具有高的净光合速率 (PN)和气孔导度 (gs) ,在高叶温 (>46℃ )和强日辐射光 (PPFD>2 10 0 μm ol· m- 2· s- 1 )下这种差异更明显。在光合作用日进程中 ,净光合速率的下降主要受气孔开度的影响。沙柳的光合作用在高温条件下受到严重的抑制 ,表现在光合产物的负积累 (以呼吸消耗为主 ) ,炎热夏季沙柳的光合净积累仅在早上进行。沙柳的最大量子产率在 16∶ 0 0左右最低 ,表明这一阶段光系统 II受到抑制 ,但这种作用至晚间消失。在炎热夏季 ,荒漠灌木的光合作用日...

比较研究了 3种沙地灌木羊柴 (H edysarum fruticosum var.mongolicum)、油蒿 (Artemisia ordosia)和沙柳(Salix pasmmophylla)在适宜光照和温度 (春季 )以及高温强光 (炎热的夏季 )的光合气体交换特点。前两种灌木为自然分布的种类 ,后一种为人工插条栽植的种类。瞬时光合有效辐射 (PPFD)、叶面温度 (Tleaf)、净光合速率 (PN)、光系统 II最大量子产率 (Fv/ Fm)等参数每隔 2 h进行 1次测量。羊柴和油蒿分别比沙柳具有高的净光合速率 (PN)和气孔导度 (gs) ,在高叶温 (>46℃ )和强日辐射光 (PPFD>2 10 0 μm ol· m- 2· s- 1 )下这种差异更明显。在光合作用日进程中 ,净光合速率的下降主要受气孔开度的影响。沙柳的光合作用在高温条件下受到严重的抑制 ,表现在光合产物的负积累 (以呼吸消耗为主 ) ,炎热夏季沙柳的光合净积累仅在早上进行。沙柳的最大量子产率在 16∶ 0 0左右最低 ,表明这一阶段光系统 II受到抑制 ,但这种作用至晚间消失。在炎热夏季 ,荒漠灌木的光合作用日动态曲线表现出典型的双峰型 ,而在春季则为单峰型 ,且夏季的第一个峰值比春季的峰值早 2 h左右。实验表明高温造成了沙柳光合作用的严重抑制 ,而天然种类羊柴和油蒿则在相同的环境下更抗高温与强光辐射。沙柳在春季适宜的环境下积累?

How to make full use of limited precipitation by vegetation, how to design density of vegetation without soil water deficit, how to make disposition of vegetation with soil water landscape and how to manage soil water resources for use of vegetation which all play significant parts in ecological restoration and reconstruction in sand land in semi-arid areas. Based on studies on the relation of soil water balance to shrub community in sand land,established the modeling soil moisture loss from roots of shrub communities...

How to make full use of limited precipitation by vegetation, how to design density of vegetation without soil water deficit, how to make disposition of vegetation with soil water landscape and how to manage soil water resources for use of vegetation which all play significant parts in ecological restoration and reconstruction in sand land in semi-arid areas. Based on studies on the relation of soil water balance to shrub community in sand land,established the modeling soil moisture loss from roots of shrub communities such as AET=(1-e~(-K))W_t or AET=(1-K_1)W_t and presented the formulas of density of shrub community such as D=(1/a_c)(ΣP/ΣAET)~(1/2)or D=(1/a_c)(1-β)(ΣP/βΣAET-1). From that,soil water depletion inboth communities of Salix psammophila and Hedysarum leave were modeled and their densities were calculated. The parameters of these models and density formulas can be easily obtained with clear physical concept. The achievements of the research are valuable for plantation of sand land and for studies on other types of vegetation-soil water relation.

在半干旱地区沙地中,如何使有限的降水被植被利用,植被不发生水分亏缺的情况下,植被密度如何?植被依赖于土壤水分环境的分布格局如何?如何对沙地水资源植被利用的管理等?这些对于沙地生态恢复与重建具有重要的意义。根据沙地灌木林群落土壤水分平衡关系的研究,建立了沙地土壤根际水分消耗模型:AET=(1-e-K)Wt或AET=(1-K1)Wt;提出了灌木林密度计算公式:D=(1/ac)(ΣP/ΣAET)1/2或D=(1/ac)(1-β)(ΣP/βΣAET-1);并对沙柳和杨柴两种灌木林群落的土壤水分消耗和密度进行了模拟和计算。沙地灌木林群落土壤根际水分消耗模型和密度公式的物理意义明确,参数易于确定,对于指导固沙造林实践具有重要的价值。模型强调土壤水分平衡关系的原理对于其它类型植被-土壤水分关系的研究也有指导意义。

 
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