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tropical soils
相关语句
  热带土壤
     The clay mineral with large positive charge mainly contributes to NO3N accumulation in the tropical soils.
     NO3 N深层积累主要产生在质地较重的土壤上,带正电荷粘土矿物对NO3 N吸附是导致热带土壤中NO3 N积累的主要因素。
短句来源
     Bean genotypes from two gene pools were compared for their adaptability to low phosphorus tropical soils in order to evaluate the existing germplasm for low phosphorus tolerance and supply new genetic resources for breeding.
     用来源于两个不同基因库(安第斯基因库和中美基因库)的菜豆种质为材料,比较它们在两种热带土壤中对低磷的适应性,旨在对现有种质的耐低磷能力进行系统的评价,为菜豆耐低磷育种提供新的种质资源。
短句来源
     EVALUATION OF BEAN GERMPLASM FOR LOW PHOSPHORUS TOLERANCE ON TROPICAL SOILS
     热带土壤中菜豆种质耐低磷特性的评价
短句来源
     QUANTITATIVE STUDIES ON DEVELOPMENT OF TROPICAL SOILS: A CASE STUDY IN NORTHERN HAINAN ISLAND
     热带土壤发育过程的定量研究——以海南岛北部为例
短句来源
     RELATIONSHIP BETWEEN PHOSPHORUS SORPTION CHARACTERISTICS AND PHOSPHATE FERTILIZER APPLICATION RATE IN TROPICAL SOILS OF HAINAN ISLAND
     海南热带土壤对磷的吸附特性与施磷量的关系
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  “tropical soils”译为未确定词的双语例句
     CLAY MINERALS OF TROPICAL SOILS OF HAINAN ISLAND
     海南岛热带土壤的粘土矿物
短句来源
     (4) The content of available P in the tropical soils of Hainan Island varied widely with the development and the forms of inorganic phosphorus in the soils.
     (4) 海南岛各类土壤有效磷水平差异很大,其高低主要决定土壤的发育程度和土壤无机磷的形态组成。
短句来源
     Transformation and availability of water so1uble phosphate fertilizers in tropical soils have been investigated by indoor dry-wet incubation and soil inorganic phosphorous classification on six types of soil supplied with different quantities of phosphate fertilizers.
     对海南岛6种类型土壤不同施磷量的室内干湿培养和应用土壤无机磷分级方法,研究水溶性磷肥在热带上壤中的转化和有效性。
短句来源
     The change of the available-p in the soils is consistent with those of Al-p and Fe-p,but contrary to those of Ca-p and O-p. This demonstrated that the Al-p and Fe-p transformed from phosphate fertilizers in the soils were in the form of active P and the main forms of the available -p in the tropical soils.
     土壤有效磷的变化趋势与Al-p、Fe-p相一致,而与Ca-p和O-p相反,说明磷肥在土壤中转化形成的Al-p和Fe-p为活性态P,是热带上镶有效磷的主要形态。
短句来源
     The QUEFTS (QUantitative Evaluation of the Fertility of Tropical Soils) model was calibrated for summer maize using the soil fertility data and fertilizer trials results at different sites in Huanghe-Huaihe-Haihe Plain.
     本文利用收集的黄淮海平原不同点肥料田间试验数据,对基于土壤肥力指标的夏玉米养分吸收和产量关系的土壤肥力评价模型QUEFTS进行了修正和验正。
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  相似匹配句对
     THE MAGNETIC SUSCEPTIBILITY OF THE SOILS IN SUBTROPICAL AND TROPICAL CHINA
     亚热带和热带土壤的磁化率
短句来源
     CLAY MINERALS OF TROPICAL SOILS OF HAINAN ISLAND
     海南岛热带土壤的粘土矿物
短句来源
     SELEMIUM IN SOILS
     土壤中的硒
短句来源
     The soils for forestry in Guizhou
     贵州林业土壤
短句来源
     Tropical Botanical Garden
     热带之梦中心
短句来源
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  tropical soils
Isolation and characterization of a micromycete, a producer of neutral catechol oxidases, from tropical soils with elevated diox
      
A nonsporulating fungus isolated from dioxin-containing tropical soils forms cellobiose dehydrogenase when grown in media supplemented by a source of cellulose.
      
Lake and reservoir water quality affected by metals leaching from tropical soils, Bangladesh
      
The piezocone presented some limitations for tropical soils, since the groundwater level is sometimes deeper than the layer which is impenetrable to the cone, and the soil genesis and unsaturated conditions affect soil behavior.
      
The persistence of parathion, methyl parathion and fenitrothion in five tropical soils of varying physicochemical characteristics was compared under flooded and non-flooded conditions.
      
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Mineralogical composition of the clay fraction(less than 1 μ)separated from fortyselected soil samples,representing six important soil types in Hainan island,was investigated by differential thermal analysis,X-ray diffraction,cation exchange capacity determination,chemical analysis and the measurement of ethylene glycol retention.The results showed that,for laterites derived from basalt,the predominant clay minerals arekaolinite,gibbsite and hematite;for other soil types,the predominant clay minerals areas follows:for...

Mineralogical composition of the clay fraction(less than 1 μ)separated from fortyselected soil samples,representing six important soil types in Hainan island,was investigated by differential thermal analysis,X-ray diffraction,cation exchange capacity determination,chemical analysis and the measurement of ethylene glycol retention.The results showed that,for laterites derived from basalt,the predominant clay minerals arekaolinite,gibbsite and hematite;for other soil types,the predominant clay minerals areas follows:for lateritic soils derived from acid rocks—kaolinite group(including halloysite);for tropical red earths derived from acid rocks—kaolinite and illite;for tropicalred earths derived from basalt—kaolinite group(including halloysite);for yellow earthsderived from granite and tuff—kaolinite group(including halloysite);for “savannah”derived from sediments—kaolinite and illite;for young tropical soils derived from recenteffusive volcanic rocks(mainly basalt)—montmorillonite and kaolinie group(includinghalloysite).Although the predominant clay minerals are similar for different soil types,there are still divergencies in minerals of secondary importance.It was found that parent rocks,climate,time and vegetation exert some influenceon the composition of clay minerals of the soils.The sequence of transformation of the layer silicate minerals in acid rocks in tropicalregion may be as follows:mic→illite→mixed layer minerals→montmorillonite→kaolinite.Owing to the intensive leaching,followed by accelerated depotassication and desilicationunder tropical conditions,the process of hydroxylation will be very short or even absence.Contrary to certain inference in the soils derived from effusive volcanic rocks(mainlybasalt),allophane are absent.The sequence of transformation of clay minerals in thetropical conditions seems to be montmorillonite→kaolinite group(including halloysite)→gibbsite.Results revealed that kaolinite can be derived directly from potash-feldspare in porphyritic granite under tical conditions.

应用差热分析、X 射线分析、化学全量分析、阳离子代换量和乙二醇固定量等方法,对海南岛六种主要土类的十六个代表剖面共约四十多个标本的粘粒(<1微米)进行了系列的研究。初步研究结果表明,玄武岩发育的砖红壤的粘土矿物组成以高岭石、三水铝石、赤铁矿为主;酸性岩发育的砖红壤性土以高岭类(包括埃洛石)为主;酸性岩发育的热带红壤以高岭石和伊利石为主;玄武岩发育的热带红壤以高岭类(包括埃洛石)为主;花岗岩和凝灰岩发育的黄壤以高岭类(包括埃洛石)为主;老沉积物发育的热带干草原土以高岭石和伊利石为主;近期火山喷出岩发育的热带幼年土以濛脱石和高岭类(包括埃洛石)为主。主要粘土矿物相同的某些土壤,在次要粘土矿物成分上仍有明显的不同。根据这些土壤的自然成土条件,分别讨论了母岩、气候、时间和植被等对土壤粘土矿物组成的影响。在海南岛热带气候条件下,酸性岩中层状铝硅酸盐矿物的转化规律是:云母→伊利石→混层矿物→濛脱石→高岭石捎谌却蛱跫碌牧苋茏饔们苛?脱钾作用和脱硅作用较为盛行,而不利于形成濛脱石的氢氧化作用的进行,在酸性岩发育的土壤中极少发现有濛脱石的存在?咦椿ǜ谘抑械男孪始爻な图爻な缁灞冉涎芯克得?钾长石在热带气候条件下,风...

应用差热分析、X 射线分析、化学全量分析、阳离子代换量和乙二醇固定量等方法,对海南岛六种主要土类的十六个代表剖面共约四十多个标本的粘粒(<1微米)进行了系列的研究。初步研究结果表明,玄武岩发育的砖红壤的粘土矿物组成以高岭石、三水铝石、赤铁矿为主;酸性岩发育的砖红壤性土以高岭类(包括埃洛石)为主;酸性岩发育的热带红壤以高岭石和伊利石为主;玄武岩发育的热带红壤以高岭类(包括埃洛石)为主;花岗岩和凝灰岩发育的黄壤以高岭类(包括埃洛石)为主;老沉积物发育的热带干草原土以高岭石和伊利石为主;近期火山喷出岩发育的热带幼年土以濛脱石和高岭类(包括埃洛石)为主。主要粘土矿物相同的某些土壤,在次要粘土矿物成分上仍有明显的不同。根据这些土壤的自然成土条件,分别讨论了母岩、气候、时间和植被等对土壤粘土矿物组成的影响。在海南岛热带气候条件下,酸性岩中层状铝硅酸盐矿物的转化规律是:云母→伊利石→混层矿物→濛脱石→高岭石捎谌却蛱跫碌牧苋茏饔们苛?脱钾作用和脱硅作用较为盛行,而不利于形成濛脱石的氢氧化作用的进行,在酸性岩发育的土壤中极少发现有濛脱石的存在?咦椿ǜ谘抑械男孪始爻な图爻な缁灞冉涎芯克得?钾长石在热带气候条件下,风化后可直接形成高岭石。由基性喷出岩发育的幼年土壤,其粘土矿物组成以濛脱石和高岭类矿物为主,不存在水铝英石。随着成土作用的加深,粘土矿物有濛脱石→高岭类矿物(包括埃洛石)→三水铝石的转化序列。

Studies were conducted on the fractionation of inorganic phosphoric forms in the main soil types of Hainan Island. The results obtained are as follows: (1) The total inorganic phosphorus in different soils of Hainan Island was significantly conditioned by their parent rocks in the following order: basalt latosoE>metamorphic(micaschist)and sandstone latosol>limestone red loam>granite latosol>shallow-sea deposit latosol and dry red earth. (2) As compared with parent rocks, development of soils brought about greater...

Studies were conducted on the fractionation of inorganic phosphoric forms in the main soil types of Hainan Island. The results obtained are as follows: (1) The total inorganic phosphorus in different soils of Hainan Island was significantly conditioned by their parent rocks in the following order: basalt latosoE>metamorphic(micaschist)and sandstone latosol>limestone red loam>granite latosol>shallow-sea deposit latosol and dry red earth. (2) As compared with parent rocks, development of soils brought about greater effect on the relative ratio between occluded phosphorus (O-P) and non-occluded phosphorus(non O-P). However, the formal constitution of non O-P was closely correlated with parent rocks. Fe-phosphates(Fe-P)were the main contents of non O-P in the soil developed from basalt and metamorphic rocks, but the relative conents of Ca-phosphates (Ca-P)and Al-phosphates (Al-P) in the soils developed from granite and shallow-sea deposit were higher. (3) In general, the contents of total inorganic phosphorus, non O-P and available P were higher in the surface soil than in the subsoil, but the content of O-P was lower in the former soil than in the latter. The distribution of inorganic phosphorus on the profiles was more even in better developed latosol than in young latosols. (4) The content of available P in the tropical soils of Hainan Island varied widely with the development and the forms of inorganic phosphorus in the soils.

土壤无机磷的形态、含量和分布是土壤形成过程表现出来的一种化学性质。海南岛热带土壤无机磷的形态分级的研究结果表明。(1) 海南岛早地土壤无机磷总量受到成土母质的深刻影响。玄武岩砖红壤无机磷总量>变质岩(云母片岩)和砂页岩砖红壤>红色石灰土>花岗岩砖红壤>浅海沉积物砖红壤和燥红土。(2) 土壤发育程度对闭蓄态磷(O—P)和非闭蓄态磷(非O—P)的相对比例的影响超过母质的作用,但非O—P的形态组成却与母质关系密切。玄武岩、砂页岩发育的土壤以磷酸铁盐(Fe—P)为主;花岗岩和浅海沉积物发育的土壤,磷酸钙盐(Ca—P)和磷酸铝盐(Al—P)相对含量较高。(3) 一般来说,土壤表层的无机磷总量、非O—P和有效磷都高于心土层,而表层O—P含量则低于下层。发育程度高的砖红壤无机磷在剖面上的分布比幼年土均匀。(4) 海南岛各类土壤有效磷水平差异很大,其高低主要决定土壤的发育程度和土壤无机磷的形态组成。

The acid precipitation of pH>3.0 haven′t remarkable contributions to the acidification of tropical soils. However, the contents of organic matter in soils decrease in varying degrees. The availabilities of anion nutrient elements N, P, S are increased after the acidic leaching. But the contents of cation nutrient elements such as Ca, Mg and K are reduced.

一般范围内的酸沉降对热带土壤酸化的影响不大,但有机质含量出现一定程度的下降。阴离子态营养元素N、P、S的有效性提高,但阳离子态营养元素Ca、Mg、K等的供应水平降低,土壤交换性能的质量下降。

 
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