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- A Simple Model in Calculating Average Soil Respiration Rate and Soil Carbon Density 一个计算平均土壤呼吸速率和土壤碳密度的简单模型
- Soil carbon density 土壤碳密度
- 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。
- soil organic carbon density (SOCD) 土壤有机碳密度(SOCD)
- Soil labile organic carbon density 土壤活性有机碳密度
- The East China belongs to the area of the high value (over (3t/hm~2)) and the agropastural ecotone in North China has the low value of carbon density which is less than (1t/hm~2). 农田C密度高值区主要分布在我国东部地区且多>3t/hm2;低值区主要分布在我国北方农牧交错带地区且普遍<1t/hm2。
- 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;
- This trend is negatively related with the change in population density in logarithmic mode, which indicates that the actual forest carbon density is prominently determined by human activities. 这种分布规律与我国人口密度的变化趋势正好相反 ;两者有一种对数关系 .;这说明我国实际森林植物C密度大小首先取决于人类活动干扰的程度
- 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
- 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]
- The effects of carbonous density and solid volume loading on the microstructures, and the performance of the new method were investigated. 通过对焊缝金相显微结构的分析,结合计算机图形处理软件计算出焊缝的烧结密度。
- Knoepp, J. D. and W. T. Swank (1997) Forest management effects on surface soil carbon and nitrogen. Soil Science Society of America Journal 61: 928-935. 颜江河(2005)森林土壤的碳吸存量。森林与环境变迁研讨会论文集。国立中兴大学森林学系主办。国立中兴大学农业暨自然资源学院十楼国际会议厅。226页。
- Recently much effort has been spend on the evaluation of soil carbon sequestration potential as a measure to temporarily reduce the increasing rate of atmospheric GHGs. 近年来有许多研究致力于探讨土壤碳封存能力,期望能减缓大气温室气体增加的速度。
- Correlation analysis revealed that CPMI may be a better indicator than soil organic matter employed to reflect the dynamic changes of soil nutrients and soil carbon. 相关性分析表明,运用土壤碳库管理指数表征土壤养份及碳素动态变化比土壤有机碳更具灵敏性。
- LI Changsheng.Loss of soil carbon threatens Chinese agriculture:a comparison on agroecosystem carbon pool in China and the U.S.[J].Quaternary Sciences,2000,20 (4):345-350. [5]长生.;土壤碳储量减少:中国农业之隐患-中美农业生态系统碳循环对比研究[J]
- Changtan Nature Reserve soil organnic carbon density(SOCD) 土壤有机碳储量(SOCR)
- A welding paste was designed according to a theoretical formula for carbonous density, and an inexpensive method of joi- ning reaction-bonded silicon carbide ceramics was provided. 以石油焦和碳化硅为主要原料,按照焊料碳密度的理论计算公式设计焊料碳含量,运用反应成型连接法焊接反应烧结碳化硅陶瓷。