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- soil carbon content 土壤磷含量
- Its carbon content is 5 per cent. 其碳的含量为百分之五。
- Because the carbon content of steel largely determine its usefulness for specific application. 因为钢的含碳量在很大程度上决定了钢在具体应用时的范围。
- The carbon content of mild steel is much lower than cast-steel. 软钢的含碳量要比铸钢的低得多。
- Results show that no-tillage with straw cover (NTS) can improve soil structure property,soil organic carbon content,and soil water infiltration. 结果表明,免耕覆盖可以改善土壤结构性能,增加土壤有机碳含量,从而提高水分入渗能力。
- Dissolved organic carbon (DOC) is an important part of soil carbon pool. 溶解有机碳(Dissolved Organic Carbon,简称DOC)是土壤碳库的重要组成部分。
- This paper adopted the soil distribution area, sampling data and soil organic content from the first soil general survey and applied the technique of GIS to estimate soil carbon reservior in China. 根据中国第一次土壤普查得到的土壤各类型分布面积、采样数据、土壤有机质含量,运用GIS技术,来估算土壤碳库。
- The more pronounced ferrite refinement is achieved as carbon content increased. 碳含量提高有利于铁素体晶粒细化。
- It is suitable for measurement of bright carbon content of coal power type. 用于煤粉型砂等材料光亮碳含量的测定。
- To respond to quenching, the carbon content must be about 0. 30% or more. 为了适应淬火;含碳量必须约为0.;30%25或更多。
- T700 fibers had a higher carbon content and less nitrogen than did T300 fibers. T700的含碳量高于T300,含氮量低于T300。
- Furthermore, reducing tillage increases soil carbon sequestration, compared with conventional moldboard plowing. 跟传统的板犁耕法比起来,减少犁田还可以增加土壤封存的碳。
- When primitive subalpine abies forest was deforested to cropland, soil carbon stock and its stability decreased. 人工林土壤呼吸速率大于天然次生林,农地和草地呼吸速率最低。
- S. croplands to sequester soil carbon comes from conservation tillage, including no-till. 美国农地封存碳的潜能约有一半来自保育耕法,其中就包括不整地栽培法。
- Contents of all types of soil carbon and CPMI were improved when the straw was retuned to the soil. 秸秆还田免耕、旋耕提高了土壤不同形态碳素含量和碳库管理指数;
- Because the carbon content of steel largely determines its usefulness for specific application. 因为钢的含碳量在很大程度上决定了钢在具体应用时的范围。
- Yang, J.C., J.H.Huang, Q.M Pan, J.W.Tang, X.G.Han. 2004.Long-term impacts of land-use change on dynamics of tropical soil carbon and nitrogen poois. 杨景成;黄建辉;唐建维;潘庆民;韩兴国.;2005
- The calcium carbonate content of phosphate rock determines the pore structure. 磷矿中碳酸钙的含量决定了磷矿的毛细孔结构。
- Pan G X,Li L Q,Zhang X H.Perspectives on issues of soil carbon pools and global change[J].J.of Nanjing Agric.Univ.,2002,25(3):79-88. [8]潘根兴;李恋卿;张旭辉.;土壤有机碳库与全球变化研究的若干前沿问题[J]
- If the carbon content of the steel is below 0.2 per cent, the product is mild steel, which is quite ductile. 钢的含碳如低于1.;2%25就是延展性好的软钢。