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水稳性的
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  water stable
     Study on Soil Water Stable Aggregate of Grassland and Forest Flood During Grazing in Hilly and Gully Regions on the Loess Plateau
     黄土高原丘陵沟壑区放牧林草地团聚体水稳性的研究
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  “水稳性的”译为未确定词的双语例句
     compare every index and determine method to bituminous mixture.
     对评价沥青混合料水稳性的各项指标及测定方法进行分析比较;
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     The main research approach is to compare several kinds of existing drainage pitch mixture gradation, through adjusting fine aggregate and coarse aggregate proportion, especially 2.36mm and 1.18mm, from the results of tests, point out optimum gradation of good water stability, and find the interrelation of bituminous mixture perviousness and void ratio.
     主要研究方法是比较几种现有的排水沥青混合料的级配,通过调整级配的粗料和细料,特别是4.75mm和1.18mm的集料比例,从所确定级配的试验中,发现具有良好水稳性的最佳级配,并发现沥青混合料的透水性和空隙率的相互关系。
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     The water stability of soil cluster is studied after the treatment of different molecular weight and charge density PAM of artificial soil by way of simulation test in the hothouse.
     通过温室模拟试验,研究人工土壤,经不同分子量和电荷密度PAM处理后团聚体水稳性的变化状况。
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     Following conclusions can be reached:(1) There are several factors affecting water stability of soil aggregate (WSA) such as soil OM (organic matter), soil nitrogen and phosphorus content, vegetation, and no-tillage years, et al.
     (1)影响土壤团聚体水稳性的因素主要有土壤有机质、土壤全磷、土壤全氮和土壤植被以及退耕年限等。
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     This subject mainly probes into many kinds of factors influencing pitch mixture water stability from the own performance of pitch, micro mechanism analysis, pitch mixture characteristic, road water stability mechanism and several respects.
     本课题主要从沥青本身性能、微观机理分析、沥青混合料特性、道路水稳性机理分析几方面探讨了影响沥青混合料水稳性的多种因素。
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     Water
    
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     They always connected water with their attitude.
    
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     Method of asphalt mixture immersion stability test
     沥青混合料稳性试验方法
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     Research of Bituminous Concrete Pavement Water Stability
     沥青混合料稳性研究
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     Enhancing Water-Stability of Asphalt Pavements with Hydrated Lime
     应用消石灰提高沥青路面稳性
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  water stable
The content of water stable aggregates in 18-year-old shrub land soil is higher than the 8-year-old shrub land, and the big aggregates (>amp;gt;5 mm) increased for the most part, by 67.4% and 59.0% in different layers, respectively.
      
The number of soil granular aggregates or the water stable aggregates under corylus clusters is more than that under the non-corylus clusters.
      
The influence of earthworms was determined by comparing soil aggregates and casts with respect to dry and moist porosity, swelling, and water stable aggregation.
      
In low P soils, however, a positive relation between the abundance of water stable soil aggregates in the 0.5-2?mm diameter range and RTI was most important.
      
The influence of water stable aggregation of soil on RTI was modulated by soil P levels.
      
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Annual rotation of a winter crop with the summer rice is a common agricultural practice in Chekiang province. The rotation system is in variant with regard to the winter crops. In order to evaluate the effect of different winter crops on the state of soil aggregation, the present study was undertaken. Four green-manuring crops including Astragalus sinicus, Medicago denticulata, Vicia faba and Pisum sativam, two winter grain crops including wheat and barley, and one oil-bearing crop, rape, were chosen for rotation...

Annual rotation of a winter crop with the summer rice is a common agricultural practice in Chekiang province. The rotation system is in variant with regard to the winter crops. In order to evaluate the effect of different winter crops on the state of soil aggregation, the present study was undertaken. Four green-manuring crops including Astragalus sinicus, Medicago denticulata, Vicia faba and Pisum sativam, two winter grain crops including wheat and barley, and one oil-bearing crop, rape, were chosen for rotation with the summer rice in the field. The soil under experimentation has been developed under cultivation from an alluvial parent material of fine sandy loam. The field had a water-table lying at a depth of about one meter from the top of the soil throughout the year except during rice growing season. As a check for comparison, winter fallow following rice was also included among the field treatments. Experiments are continued through five consecutive crop seasons, including two in rice and three in winter crops. Among the results, the following may have practical significance in evaluating the various systems of annual rotation for rice field: 1. Among the rotating winter crops tested, Astragalus sinicus is most effective in promoting the formation of soil aggregates having 1-5 mm. in diameter which are believed to be beneficial for rice cultivation. Other leguminous crops also show their constructive effect on soil aggregates, but are by far inferior to the Astragalus. To the contrary, soils under winter grains and the rape tend to deteriorate in their aggregation. 2. Close parallel relationship is found between the soil organic matter content and the percentage content of soil aggregates having 1-5 mm. in diameter. 3. The structural units with diameters larger than 5 mm. seem to be different in nature from those aggregates having 1-5 mm. in diameter. For rice soils, such large structural units are believed to be of little practical importance in so far as their fertility status is concerned, since they are to be disintegrated during the cultivation of rice.

四、摘要本試驗的一年轮作制,包括單季水稻与下列冬作的轮栽:紫云英,苜蓿,蚕豆,豌豆,油菜,小麦及大麦。另以冬季休閑作为对照。經过三次冬作,二次水稻(夏作)的轮栽,結果显示: 1.冬季种植一年生荳科綠肥,能够增加土埌中有机質含量。其中以紫云英最佳;苜蓿,蚕豆,豌豆等次之。 2.在水稻与紫云英轮作的土埌中,直徑为1—5毫米的团粒含量有显著的增加。水田中的其他荳科綠肥,如苜蓿,蚕豆,豌豆等,也能維护土埌中的团粒構造,但其效果較差。水田中禾谷类冬作轮栽或油料作物轮栽,对于土埌中直徑为1—5毫米的团粒含量,均有破坏的影响。 3.各輪作区,凡土埌有机質含量較高的,其直徑为1—5毫米的水稳性团粒也比較多;而其他大小的構造單位,和有机質的多少无关。

1 7—18% 1 80% 1 <0.25 1—0.5 7—32%.43%, 26%.~~

贛中丘陵地区红壤性水稻土分布面积很广,但由于所处的地形部位不同及人类耕作措施各异,各类红壤性水稻土的肥力水平有很大差异。影响土壤肥力水平有两个方面:卽土壤既能滿足作物生长过程所需的水分和养分,又能使作物有良好的“居住环境”,而土壤的物理性质对保証作物良好的居住环境起有决定的作用。研究土壤的结构、各结构体内的孔隙状况以及結构胶結物貭的种类和数量,对认識土壤物理性貭在提高肥力上的作用具有很大意义。根据我們初步的研究結果,紅壤性水稻土中,水稳性結构大于1毫米粒級的結构体,含量較少,一般仅占总数的7—18%,小于1毫米的占80%以上。在小于1毫米的各粒級中,除<0.25毫米粒級占絕对优势外,1—0.5毫米的粒級占7—32%,肥土(烏泥田)中1—0.5毫米粒級的含量較高。不同土壤的結构体,由于其内部的孔隙状况不一,土壤肥沃度也各有异。肥土結构体内的总孔隙度高达43%,而瘠土(結板田)只26%。如按相同粒級結构体内的孔隙相比也是肥土中高而瘠土中低。在这个地区土壤結构体内孔隙的形成,主要取决于結构胶結物貭的种类和数量以及微凝聚体的排列形式。一般的說,如果胶結物貭以无定形R_2O_3或多量粘粒的接触作用为主,則結构体內部的孔...

贛中丘陵地区红壤性水稻土分布面积很广,但由于所处的地形部位不同及人类耕作措施各异,各类红壤性水稻土的肥力水平有很大差异。影响土壤肥力水平有两个方面:卽土壤既能滿足作物生长过程所需的水分和养分,又能使作物有良好的“居住环境”,而土壤的物理性质对保証作物良好的居住环境起有决定的作用。研究土壤的结构、各结构体内的孔隙状况以及結构胶結物貭的种类和数量,对认識土壤物理性貭在提高肥力上的作用具有很大意义。根据我們初步的研究結果,紅壤性水稻土中,水稳性結构大于1毫米粒級的結构体,含量較少,一般仅占总数的7—18%,小于1毫米的占80%以上。在小于1毫米的各粒級中,除<0.25毫米粒級占絕对优势外,1—0.5毫米的粒級占7—32%,肥土(烏泥田)中1—0.5毫米粒級的含量較高。不同土壤的結构体,由于其内部的孔隙状况不一,土壤肥沃度也各有异。肥土結构体内的总孔隙度高达43%,而瘠土(結板田)只26%。如按相同粒級結构体内的孔隙相比也是肥土中高而瘠土中低。在这个地区土壤結构体内孔隙的形成,主要取决于結构胶結物貭的种类和数量以及微凝聚体的排列形式。一般的說,如果胶結物貭以无定形R_2O_3或多量粘粒的接触作用为主,則結构体內部的孔隙度較小(如紅瓖母貭)。肥沃的紅壤性水稻土中,結构体的胶結物貭以有机貭起主导作用及顆粒大小不均一,使結构体內部的孔隙度較大。由于胶結物貭的种类和数量不一,有机、无机胶体的复合类型也不同,因而使肥土中的結构体不仅具有水稳性,而且还是多孔性的。只有这种結构体才能調节和滿足作物生长所需的土壤环境,才能形成肥沃的土壤。

~~

本文引用了胶体化学的观点和方法及显微镜观察技术,研究了江西红壤中的胶结物质和结构形成的关系。结果表明,不同土壤中的胶结物质大致可分成三类:(1)以无机胶结物质为主(如第四纪红色粘土母质);(2)无机胶结物质和有机胶结物质(如旱地红壤);(3)以有机胶结物质为主(如乌泥田)。三类胶结物质中的胡敏酸含量是以第四纪红色粘土中为最少,旱地红壤中稍高,乌泥田中最多,胡敏酸和富里酸的比值相应为0.1—0.2,0.5—0.7及1。胡敏酸和富里酸的比值并不决定于有机碳总量,而在一定程度上与耕作水平密切相关。看来肥沃的土壤要大些。三类胶结物质所形成团聚体的孔隙性,以第一类为最低(30%),第三类为最高(40%)。各类团聚体中的脂蜡物质、游离态有机胶结物质和胡敏素含量,在绝大多数情况下,是随着团聚体粒径的减小而减少。当土壤含有机质较少时,团聚体中与有机质结合的无定形三氧化铁和无定形三氧化铁的含量是随着团聚体粒径的減小而增多。良好团聚体的形成要通过多种多样的结合作用,既由胡敏素结合成稳定性很大的微团聚体,又有由较新鲜的有机胶结物质把微团聚体结合为大团聚体。这种大团聚体既有一定的水稳性,又具备多孔性及养分速效性的特点。土壤粘土矿物在...

本文引用了胶体化学的观点和方法及显微镜观察技术,研究了江西红壤中的胶结物质和结构形成的关系。结果表明,不同土壤中的胶结物质大致可分成三类:(1)以无机胶结物质为主(如第四纪红色粘土母质);(2)无机胶结物质和有机胶结物质(如旱地红壤);(3)以有机胶结物质为主(如乌泥田)。三类胶结物质中的胡敏酸含量是以第四纪红色粘土中为最少,旱地红壤中稍高,乌泥田中最多,胡敏酸和富里酸的比值相应为0.1—0.2,0.5—0.7及1。胡敏酸和富里酸的比值并不决定于有机碳总量,而在一定程度上与耕作水平密切相关。看来肥沃的土壤要大些。三类胶结物质所形成团聚体的孔隙性,以第一类为最低(30%),第三类为最高(40%)。各类团聚体中的脂蜡物质、游离态有机胶结物质和胡敏素含量,在绝大多数情况下,是随着团聚体粒径的减小而减少。当土壤含有机质较少时,团聚体中与有机质结合的无定形三氧化铁和无定形三氧化铁的含量是随着团聚体粒径的減小而增多。良好团聚体的形成要通过多种多样的结合作用,既由胡敏素结合成稳定性很大的微团聚体,又有由较新鲜的有机胶结物质把微团聚体结合为大团聚体。这种大团聚体既有一定的水稳性,又具备多孔性及养分速效性的特点。土壤粘土矿物在形成团聚体中的作用与其他胶结物质密切相关。

 
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