通过对青海主要土壤类型剖面的有机质、机械组成、阳离子交换量三者之间的关系分析。
The relationship was analysised between organic matter, soil granular composition and cation exchange capacity(CEC) in Qinghai major soil types.
土壤颗粒组成、容重、有机质、孔隙率影响土壤持水性能。
Then, the bulk density, porosity, the type of pore, particle constitute and organic carbon in the soil affected the soil moisture diffusivity.
从而为利用深海沉积有机质碳同位素组成研究古气候变迁提供了依据。
Such a study provides a basis for understanding palaeoclimate shifts by investigation of organic carbon isotopic composition in the deep sea sediments.
油浸显微镜下鉴定硅岩中的干酪根组成多为有机质碎片和微粒体，并显示微弱的各向异性。
Microscopic studies of the kerogen from the chert samples show that the main components of the kerogen are organic fragments and microsome with weak anisotropy.
科学把物质划分为有机和无机，有机质是以蛋白质为组成的主体，而蛋白质被认定为生命的原质。
Substances are divided into organic substances and inorganic substances in science. Organic substances include proteins, which is often regarded as the original substance of life.
沉积物对土壤钾素状况的影响与其颗粒组成、有机质含量、CEC和土地利用方式等因素有关。
The sediment and soil potassium condition is related to some factors, such as granule size, organic matter content, CEC and land use means.
江苏滩涂为粉砂质沉积物组成，有机质含量低，结构性差，抗蚀能力弱。
Seashore is composed of silty sediment in Jiangsu province, content of organic matter is low, soil structure is bad, and the capacity of resistance to erosion is weak.
微生物的作用并没有显著改变乙草胺的吸附规律，乙草胺的吸附受到土壤有机质和矿物组成的显著影响。
The rule of absorption was not observably changed by the effect of microorganism and the absorption was observably influenced by the soil organic matters and mineral composition.
冻融作用对土壤水分、密度、有机质和土壤的机械组成等因素都有不同程度的影响。
Freeze-thaw action can effect in varying degrees to factors such as soil moisture, density, organic quality and soil machinery composition.
本文对黑钙土、黑土中各种作物根茬留茬与否对土壤腐殖质、土壤重组有机质的组成、结合形态及某些光学性质进行了测定。
There are few studies on the effect of crop root systems on the composition, particularly on the heavy fraction of soil humus.
土壤有机质是土壤的重要组成部分，土壤有机质的存在直接或间接地影响土壤的物理、化学和生物等许多性质。
Soil organic matters (SOM) are important components in soil, and they would affect the physicochemical, chemical and biological properties of the soil directly or indirectly.
有机质是土壤的重要组成成分，其含量水平是衡量土壤肥力的重要指标之一。
Organic matter is a very important part of soil. The level of content is one of the key indicators to measure soil fertility.
腐殖物质(主要组成为腐殖酸)是自然界中分布最为广泛的有机质，占土壤、水圈、生态系统中总有机质含量的50 ~ 80%。
Humic substances, the most widespread organic compounds in nature, account for 50 ~ 80 percent of the total organic compounds in the soil, hydrosphere and ecosphere.
海湾沉积物中的有机质和氮、磷营养物质丰富与否，直接反映了底质环境的优劣。底质环境的好坏在一定程度上又直接影响生物的生存、发育及种类组成。
The abundance of organism, nitrogen and phosphorus in the sediment directly reflect the bottom environment which, influences to a certain extent the organisms, their variety and composition.
碳水化合物是土壤有机质的重要组成成分，其含量和特性对土壤性质有很大的影响。
Soil carbohydrates constitute a significant part of the soil organic matter and the quality and quantity of carbohydrates in soils can influence the quality of soil.
对于低有机质（TOC<4%）样品，黄铁矿由同生和成岩组分组成。
For organic-poor(TOC<4%) sediments, pyrite was of syngenetic and diagenetic.
煤中低分子化合物作为煤有机质的重要组成部分，日益受到人们的广泛关注。
As the important part of coal organic structures, low molecular weight compounds in coal and its effect on coal conversion features has been increasingly received interests recently.
土壤有机质中的碳是地球碳库的重要组成部分，它参与全球碳循环。土壤有机质分解而产生的CO2和CH4是重要的温室气体。
The carbon in soil organic matter (SOM) is a significant component of the earth's carbon reservoirs, and participates in the global carbon circulation.
轻组有机质主要是由不同分解程度的植物残体和一些微生物结构体组成，它的改变可以用来指示土壤肥力的变化。
Light fraction organic matter is largely composed of plant residues at various stages of decomposition and a lot of microbial debris. Soil fertility varies with its changes as indicators.
沙三段下部优质烃源岩常常呈纹层结构，主要由富有机质的碳酸盐纹层和粘土纹层组成。
The high-quality source rocks of the lower formation of Es_3, usually with laminated structure, are primarily composed of carbonate laminas and clay laminas with rich organic matter.
沙三段下部优质烃源岩常常呈纹层结构，主要由富有机质的碳酸盐纹层和粘土纹层组成。
The high-quality source rocks of the lower formation of Es_3, usually with laminated structure, are primarily composed of carbonate laminas and clay laminas with rich organic matter.
应用推荐