Results 31 to 40 of about 1,488 (170)
, 2009 通过2004年2～12月对古尔班通古特沙漠南缘2年生人工梭梭和沙拐枣混交林内3条典型坡面土壤水分进行了系统监测与研究。结果表明:人工林土壤水分状况受季节性降水、人工林种植密度、地形因子的影响而出现明显的时空分异。在空间上将土壤水分变化划分为三层,0～30cm为活跃层,30～60 cm为次活跃层,60～120 cm为相对稳定层。通过主成分分析,得出地形因子、种植密度对0～30 cm土层土壤水分的影响次序为坡度>坡向>种植密度>高程,30～60 cm土层为坡向>种植密度>坡度>高程,60～120 ...
付恒飞, 宋春武, 蒋进, 陈钧杰
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Major Achievements and Future Key Fields of Soil Erosion Research in China [PDF]
, 2022 [Objective] The developing history of soil erosion research in China was reviewed, the major research achievements were summarized, and the current problems and key research fields in the future were analyzed to provide a reference for China's soil and ...
Cai Qiangguo, Ke Qihua, Zhang Keli
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Structure Genetic Mechanism and Provenance Analysis of Badain Jaran Desert, Northwest China [PDF]
, 2015 由于长期构造地质作用，我国西北部地区变得气候持续干旱，生态极为脆弱。生态系统的不断恶化，加上人为因素的影响，塔克拉玛干、腾格里、毛乌素、巴丹吉林沙漠等沙漠化形势越来越严峻，尤其每年冬春季节将频发沙尘暴活动，严重影响了人民群众的正常生活。而巴丹吉林沙漠正好地处我国东、西部沙区之间的过渡敏感地带，以发育有复杂高大沙山，分布着星罗棋布的湖泊而闻名于世，具有较高的学术研究价值，一直以来倍受中外学者的高度重视和关注。 迄今为止，学术研究主要关注点在沙漠物源、成因机理、侵蚀过程和治理方法等方面 ...
韩超
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Evaluation of freeze-thaw wind erosion and analysis of influencing factors on the Tibetan Plateau based on the improved RWEQ [PDF]
Freeze-thaw wind erosion refers to the process in which temperature fluctuations cause changes in the surface structure, significantly impacting on the formation of surface landform and soil properties. However, due to the particularity and complexity of
Fujun NIU +4 more
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, 2018 针对我国荒漠化危害严重,不利于植物种植等系列问题,以番茄为试验材料,结合纸膜、保水剂、生物基固沙剂等不同保水固沙措施,分析各处理下基质的理化性质以及番茄的生物学性状,以探明各处理对沙地环境的改善效果及对番茄生长的影响,为沙漠的防治及沙产业的发展提供参考。结果表明:瓦楞纸处理显著提高了番茄果实的有机酸、可溶性糖含量,分别比CK高27. 78%、8. 87%,其pH值比CK高0. 89,速效氮含量是CK的40倍;牛皮纸处理20~40 cm含水量比CK高73.
兰挚谦 +10 more
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Shuitu Baochi Xuebao, 2003 由风蚀所导致的土壤物质再分配过程,决定了土地沙漠化的程度。根据半干旱干草原地区不同程度沙漠化土地土壤风蚀率的137Cs示踪结果,沙漠化各个阶段的土壤风蚀率指标为:潜在沙漠化土地以微弱堆积和微度风蚀为特征,风蚀率小于2000kg/(hm2·a);轻度沙漠化土地风蚀率介于2000～7000kg/(hm2·a)之间;中度沙漠化土地风蚀率大于7000kg/(hm2·a);重度沙漠化土地风蚀和堆积都很强烈,地表物质交换迅速,没有必要制定风蚀指标。
张春来 邹学勇 董光荣
doaj +2 more sources
Hydrogeological structure of shallow-buried coal seam in wind erosion landform area and water-retaining coal mining method [PDF]
Xinjiang has an arid climate and scarce water resources, thus rendering the protection of water resources a major issue for coal mining. Taking the Yushuquan Coal Mine in Xinjiang as the study area, this study investigated the hydrogeological structure ...
CAI Jin +6 more
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Extent of Cropland and Related Soil Erosion Risk in Rwanda (卢旺达农田面积扩张带来的土壤侵蚀风险研究)
, 2016 在非洲，农田开垦是造成土壤侵蚀的主要原因。本研究以卢旺达为例，评估了该国当前的农田面积和土壤侵蚀情况。卢旺达是非洲最近十年人口增加和农田扩张最快的国家。我们利用 Landsat-8 影像，得到了卢旺达 2015 年的土地利用和覆被数据。基于降水、土壤性质、数字高程模型（DEM）、归一化植被指数（NDVI）和土壤保护因子数据，驱动 RUSLE（Revised Universal Soil Loss Equation）模型，评估了卢旺达的土壤侵蚀速率，空间分辨率是 30 米。模型结果显示 ...
Fidele Karamage
semanticscholar +1 more source
Effect of Freezing on Wind Erosion Resistance of Sand Dune Soil [PDF]
[Objective] To investigate the effect of winter soil freezing on soil erodibility and anti-erodibility in the Yellow River section of the Ulan Buh Desert.
DOU Chunhua +4 more
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Soil Erosion and Its Spatial Distribution Characteristics in Three-River-Source National Park [PDF]
, 2023 [Objective] The Three-River-Source National Park (TRSNP) is considered to be the “water tower of China”, and is an important ecological security barrier in China.
Huang Tingting +5 more
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