Results 61 to 70 of about 377 (100)
Study on the effect of layered structure of overlying strata on soil damage in mining areas in the loess covered region of northern Shaanxi [PDF]
Ecological protection in coal mining areas is a major problem that needs to be solved urgently for high-quality development in the Yellow River Basin. Scientific understanding of the response law of the overlying strata of the coal seam to the surface ...
Jiangbo WEI +7 more
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Research Status and Prospect of the Application of Radionuclides in Agricultural Resources and Environment [PDF]
Radionuclides with a diverse range of applications and high analytical efficiency to promote multidisciplinary Innovation and developments, which are considered to be an essential tool in the field of modern science and engineering.
Jianfeng ZHANG +4 more
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Shuitu Baochi Xuebao, 2018 为改善江汉平原地区稻田水肥管理措施，采用田间小区试验，研究了常规淹灌（CF）和浅灌深蓄（SIDS）条件下，农民习惯施肥（FFP）、30%尿素+70%控释参混肥（30%N+70%CRF）和优化减氮施肥（OPT-N）对水稻各生育阶段稻田氮磷流失特征、养分吸收和土壤养分积累的影响。结果表明：与CF处理相比，SIDS处理田间灌溉水量、总用水量、径流量和渗漏量分别降低41.7%，18.5%，45.8%和21.9%，降雨利用率增加16.2%，TN和TP径流流失量分别降低32.6%～35.9%和36.4%～53.1%，
晏, 吴启侠, 朱建强, 张露萍
doaj
Shuitu Baochi Xuebao, 2021 准确评估区域土壤侵蚀和养分流失空间分布特征，是开展区域水土保持规划和生态治理的基础。基于GIS空间分析技术和RUSLE模型，对云南省土壤侵蚀和养分流失特征进行定量化分析。结果表明：云南省土壤侵蚀面积为1 835.91×104 hm2，占总面积的48.07%，平均侵蚀模数为15.65 t/（hm2·a），土壤侵蚀以微度侵蚀、轻度侵蚀为主，但极强烈侵蚀、剧烈侵蚀是区域侵蚀产沙的主要来源。滇西南区土壤侵蚀强度较大，而滇西北区土壤侵蚀强度较小。区域土壤侵蚀主要发生在夏季，旱地是区域侵蚀产沙的主要策源地 ...
陈正发 +5 more
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Simulation on Soil Carbon, Nitrogen Cycles and Output Characteristics at Banana Fields, Southeast China [PDF]
, 2011 土壤C、N循环是农业生态系统最基本的生态过程，了解土壤C、N循环是研究陆地生态系统C、N循环的重要前提。本文以南靖县五川流域的一个小流域为研究区域，选取施肥量高、面积大的种植香蕉土地利用类型为例，采取模型模拟的方法，应用NCSWAP模型模拟了较长时间尺度下(1998~2007年)土壤C、N各种循环过程及输出特征，对可能影响C、N循环的管理措施因素进行情景模拟分析，最后对农业生产和管理环节提出建设性的措施，取得了如下研究成果： (1)对种植香蕉土壤的NO3--N和SOC含量季节性变化进行了验证 ...
黄虹
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Benefit Evaluation of Different Allocation Modes of Soil and Water Conservation Measures in Ta-pieh Mountains Area [PDF]
[Objective] In order to reveal the effect of different soil and water conservation measures on reducing runoff and sediment in Ta-pieh Mountains, optimize the allocation mode of soil and water conservation measures in Ta-pieh Mountains.
JIA Tinghui +4 more
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Systematic protection and restoration of water bodies in collapse areas based on surface runoff regulation [PDF]
In order to solve the problems of surface runoff disorder, poor water connectivity, and weak hydrodynamic water circulation capacity in high groundwater level mining areas in the east, and to reduce the non-point source pollution and point source ...
Dong GUO +5 more
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Shuitu Baochi Xuebao, 2017 为探究不同覆盖措施对养分流失及其粒径分布的影响，采用人工模拟降雨试验的方法，模拟了不同雨强（30，60 mm/h）和不同覆盖物（枯落物、砾石）下，不同覆盖度对褐土坡面养分流失的影响，并对侵蚀土壤的粒径分布、养分流失浓度进行了分析。研究表明：（1）覆盖措施能够有效减少土壤流失，250 g/m2的枯落物和盖度为50%的砾石覆盖可减少91%~98%和68%~91%的土壤流失。（2）褐土坡面下，被侵蚀土壤中有机质、速效氮、速效磷的浓度基本不随覆盖条件的变化而变化 ...
李瀚之 +5 more
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Shuitu Baochi Xuebao, 2023 为揭示工程堆积体平台汇流造成的水沙及氮磷养分流失特征,以矿区堆土场为研究对象,采用室内放水冲刷试验,研究不同上方来水流量(1.7,2.3,2.9 L/min)和坡度(25°,30°,35°)下地表径流、壤中流及侵蚀泥沙产生过程,分别测定氮磷养分浓度并计算流失量及贡献占比。结果表明:蒙东地区覆土排土场边坡产流方式主要为地表径流,随坡度和冲刷流量的增大,地表径流量增大,壤中流量减小。产沙量随坡度的增大先增大后减小,侵蚀产沙的临界坡度在30°附近。地表径流中铵态氮及磷酸盐流失浓度均大于壤中流 ...
樊桐桐 +4 more
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Hydroecological effects of mining and its restoration ways in coal mining areas of Western China [PDF]
The mining areas in arid and semi-arid region have become important coal production bases to ensure China’s energy strategic security, however, coal development by large-scale and high-intensity mining has triggered a series of water resources and ...
Guangrong GE +7 more
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