Results 11 to 20 of about 12,025 (172)
Relationship Between Community Characteristics and Species Diversity of Carex Duriuscula and Soil Physiochemical Properties in Hulunbuir Steppe [PDF]
, 2023 [Objective] The relationships between community characteristics, species diversity, and soil physical and chemical properties of Carex duriuscula in Hulunbeier steppe were analyzed in order to provide a scientific reference for the protection and ...
Cui Shengchao +5 more
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Current Status and Prospect of Membrane-Based Offshore Floating Photovoltaic Technology [PDF]
, 2023 [Introduction] The research and development of offshore floating photovoltaic complies with the needs of national energy strategic development, caters to the background of industry development led by science and technology, and helps the development of ...
Bo LIU, Gang LI, Hong QIAO, Jiping CHEN
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Shuitu Baochi Xuebao, 2021 为研究植被恢复对水库消落带土壤团聚体组成及稳定性的影响，利用干筛和湿筛法，测定了大桥水库消落带不同水位高程下柳树林地土壤团聚体组成分布，并基于分形理论分析了土壤团聚体分形特征。结果表明：（1）消落带柳树林地土壤>0.25 mm非水稳定性团聚体和水稳性团聚体分别为73.13%~93.69%和47.62%~82.06%，较对照无植被样地土壤均有所增加，但两者差异不明显；消落带土壤大团聚体含量随水位高程升高而降低，随土层深度增加而减少，但在不同水位高程和不同土层间均无显著性差异（p>0.05）。（2 ...
宋娇 +4 more
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Shuitu Baochi Xuebao, 2021 为明确土壤干湿交替环境下保水剂与土壤颗粒之间的作用方式及保水剂对土壤结构和水分有效性的影响。通过土柱模拟试验，研究连续失水—复水条件下，不同粒径（>0.85，0.6~0.85，0.30~0.45 mm）保水剂对土壤水分特性、土壤团聚体分布和结构稳定性的作用，以及保水剂—土壤混合体价键结构的微观变化特征。结果表明：第1次（T1）和第2次（T2）失水取样阶段，除T2阶段的最小粒径处理外，其余各粒径保水剂促使土壤相对含水量较对照显著增加72.9%以上 ...
纪冰祎 +5 more
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Influence of mining-induced ground fissures on soil infiltration characteristics and its erosion effect in coal mining area of northern Shaanxi in the middle reaches of the Yellow River [PDF]
Cracking the soil and water loss effects of mining-induced surface fissures in the coal mining area of the middle reaches of the Yellow River is of great significance for ecological environment protection and high-quality development in the coal mining ...
Baodeng CHEN +6 more
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Shuitu Baochi Xuebao, 2021 为系统评价黄土丘陵沟壑区在"退耕还林（草）"工程实施后不同退耕模式下的土壤水分涵养功能，选取0-200 cm土层的蓄水量、土壤含水量分层比、土壤水吸力和土壤含水量年际变化率作为土壤层水分蓄存、渗透、保持和稳定性的表征指标，分别对比了不同退耕模式下的土壤水文性质。结果表明：（1）各退耕模式下土壤蓄水量差异显著，撂荒模式的土壤蓄水量最高，为还灌和还乔模式下的1.6，1.7倍；（2）还乔模式下表层土壤水分的渗透性最优，深层土壤水分的渗透潜力最大；（3）各退耕模式的土壤持水性差异显著 ...
葛俸池, 许明祥
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Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background [PDF]
[Objective] To study the vertical distribution pattern of cadmium (Cd) in shallow karst fissure soil, analyze the impacts of various factors on the distribution of Cd in fissures, and provide a scientific basis for future research on the distribution ...
CAI Huayin +6 more
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Shuitu Baochi Xuebao, 2001 研究了 5种利用方式对岩溶山地土壤水稳定性团聚体的影响。结果表明 :>0 .2 5 mm水稳定性团聚体为草坡 >林地 >弃耕地 >果园 >耕地 ;林地、草坡的土壤表层和亚表层水稳定性团聚体以 >2 mm为主 ,而果园、弃耕地、耕地土壤 >2 mm的水稳定性团聚体较小。水稳定性团聚体以及团聚的水稳性均与有机质的含量呈正相关 ,林地、草坡开垦后 ,土壤有机质分解加快或补充减少是土壤团聚体水稳定性下降及数量减少的主要原因。坡耕地退耕后 ,土壤团聚体可得到恢复。
李阳兵, 谢德体
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Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates [PDF]
[Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can ...
HAN Guangzhong +4 more
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Shuitu Baochi Xuebao, 2021 为探明咸水灌溉对麦—玉两熟轮作农田土壤团聚体的影响效应，在长期定位咸水灌溉试验（始于2006年）的基础上，研究了不同矿化度咸水连续灌溉第13~14年农田土壤盐分（ECe）及水稳性团聚体分布和稳定性指标的变化规律。试验设置5个灌溉水矿化度处理，分别为1，2，4，6，8 g/L。结果表明，0—40 cm土层土壤ECe随灌溉水矿化度增加而增大，4，6，8 g/L灌水处理与1 g/L处理间差异达显著水平。咸水灌溉改变土壤水稳性团聚体的粒级分布，灌溉水矿化度 ≤ 4 g/L时，0—40 ...
吴雨晴 +6 more
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