Results 31 to 40 of about 192 (119)
城市化对珠江三角洲存留常绿阔叶林土壤有机碳组分及其碳库管理指数的影响
Shuitu Baochi Xuebao, 2017 通过对珠江三角洲城区（植物园、白云山、帽峰山）和郊区（鹤山、从化石门、鼎湖山）存留的6个常绿阔叶林进行调查，分析城市化对存留森林土壤有机碳组分和碳库管理指数的影响。在选择的样地按0—10，10—20 cm分层采集土壤样品，并测定土壤总有机碳（TOC）、易氧化有机碳（ROC）和不易氧化有机碳（NROC）。结果表明：（1）城区森林土壤的TOC、ROC和NROC含量显著低于郊区（P＜0.05）。（2）在0—10 cm层次，城区森林土壤碳库的活度和活度指数显著高于郊区（P＜0.05）；在10—20 cm ...
张雪莹, 陈小梅, 危, 林媚珍
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Synergistic benefit analysis of carbon sink capacity and biodiversity function of artificial ecosystems in mining reclamation sites [PDF]
Land reclamation in mining areas is an inevitable measure to accelerate the restoration of biodiversity, promote the transformation and development of mining areas, and realize the transformation of carbon sources into carbon sinks. There are few studies
Cong MEN +5 more
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采用全国第二次土壤普查数据结合作者的实测数据,利用1∶100万土壤数据库对青藏高原土壤有机质层、土壤矿质层及整个剖面的土壤有机碳密度和土壤有机碳储量分别进行了估算。结果表明:青藏高原的平均土壤有机碳密度约为C7.2kgm-2,较前人的C8.01~19.05kgm-2全国平均土壤有机碳密度偏低。青藏高原总的土壤有机碳储量约为18.37Pg,其中有机质层土壤有机碳储量约占38.14%,矿质层土壤有机碳储量则占61.86%。中国科学院知识创新工程重要方向项目(KZCX3-SW-339-04 ...
周才平 +4 more
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Effects of different land use types on soil structure and hydraulic characteristics of reclaimed coal mines in semi-arid areas [PDF]
In order to explore the water characteristics of soil in reclaimed coal mines in semi-arid areas and make better use of the land in reclaimed mining areas, the basic physical properties, water characteristic curves, unsaturated water conductivity and ...
Duomei LI +5 more
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Research on soil improvement and engineering application under mixed application of environmental materials in alpine mining areas [PDF]
To address the issues of inadequate topsoil structure, soil erosion, and low soil fertility in the reclamation of alpine mining areas. Taking Qinghai West Copper Mine as an example, this study investigates the impact of three materials—sheep manure(A ...
Jie REN +4 more
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Shuitu Baochi Xuebao, 2006 主要分析不同森林植被下有机碳的分解动态和土壤碳库各组分大小、周转时间。结果表明：土壤样品培养90天，CO2累计释放量表层大致为1723～5065mg／kg、下层大致为178～642mg／kg。分解速率总的趋势是前期快，后期慢，表层明显大于下层。大小顺序为：冷杉林〉针阔混交林和阔叶林〉针叶林。在不同植被下的表层和下层土壤中，活性碳占总有机碳的0．54％～1．67％，0．45％～5．48％．平均驻留时间为11～56天、60～88天；缓效性碳占总有机碳的23．0％～63．3％，33．2％～72．2 ...
邵月红 +3 more
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The promotion mechanism of how biochar affects the reclaimed soil microbial carbon sequestration capacity in coal mining areas [PDF]
Biochar application is a key measure for enhancing soil quality. However, the impact of biochar applications on the reclaimed soil for improvement on soil physicochemical properties, enzyme activity and microbial diversity is still unclear, especially ...
Fu CHEN +5 more
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Exploration on the Stratification of the Ground Substrate Survey and the Design and Construction of Its Testing Indicator System [PDF]
The ground substrate layer is the main carrier of the material and energy cycle of the earth’s surface. At present, it is essential to have a suitable ground substrate stratification and testing index system for conducting an effective ground substrate ...
Aibing HAO +13 more
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Shuitu Baochi Xuebao, 2019 以河南省粮食主产区壤质潮土和砂土为研究对象，通过盆栽试验和室内恒温培养试验，研究了生物炭与不同腐殖化程度的传统有机物料（秸秆和腐熟鸡粪）单施及配施对壤质潮土和砂土有机碳储量、活性及碳库管理指数的影响，并进一步比较了小麦秸秆直接还田和制炭还田对土壤有机碳矿化的影响，以及生物炭对土壤原有有机碳矿化的调控作用。结果表明：相同添加量下，生物炭对土壤有机碳含量的提升效果优于秸秆和腐熟鸡粪，在壤质潮土和砂土上分别较对照提升了63.15%和115.62%。另外，生物炭显著增加了土壤稳态碳含量和土壤碳库指数（CPI ...
张影 +5 more
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Shuitu Baochi Xuebao, 2017 通过连续5年定位试验，以紫云英、秸秆和商品有机肥等有机物料还田的稻田土壤为研究对象，研究有机物料还田后不同物理分组下土壤组成特点和有机碳变化特征。结果表明，稻田土壤团聚体主要分布在2～0.25 mm与0.25～0.053 mm粒级，团聚体颗粒有机碳含量随着粒径的减小而减少。有机物料还田可提高0.25～0.053 mm和＜0.053 mm粒级团聚体有机碳的含量，紫云英、秸秆、商品有机肥等有机物料可通过提高土壤微团聚体有机碳含量而增加土壤碳库。有机物料施用增加土壤轻组组分颗粒含量，减少重组组分颗粒含量 ...
俞巧钢, 邹, 顾国平
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