Results 21 to 30 of about 974 (131)
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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Restoration of monoculture in protected and marginal areas can be organized into two phases (1) identification and prioritization of restoration sites based on remote sensing or field survey then assessing degradation level, and (2) implementation of appropriate restoration interventions.
Liang Song +9 more
wiley +1 more source
Mining-affected water resources and ecological effects in ecologically fragile mining areas of western China [PDF]
The ecologically fragile mining area in the west is an important coal production base in China, and the current scale and intensity of coal mining has far exceeded its environmental carrying capacity, which is very likely to cause irreversible damage to ...
Liqiang YU +4 more
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Occurrences of dust storms and long‐distance movement of dust across landscapes is constantly increasing in south Asia. This dust is expected to have profound impact on vegetation health and sustainability as dust may contribute to nutrient budgets of the forest ecosystems, while it could impart various stresses to the plants.
Shree P. Pandey +2 more
wiley +1 more source
对北碚观音峡背斜岩溶低山不同土地利用方式下土壤的持水、供水、吸水和蒸发特征进行了研究。结果表明,土地利用方式的不同使低吸力段水分状况存在明显差异,样地1,7的供水性能较好,样地3和6持、供水能力都较好,样地9的持、供水性能差,样地4,10的持水性能较好但供水能力较差。样地2,3,5,9土壤比水容量达10-7数量级(ml/Pa·g)时在土水势-10~-30kPa范围开始出现,表明其土壤的保水供水性能相对弱;各样地土壤在土水势-30~-60kPa时比水容量达10-7数量级,表明岩溶山地土壤在脱水过程中 ...
李阳兵 高明 魏朝富 谢德体 刘国一
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Abstract Sustainable land management (SLM) practices is a key to reducing rates of land degradation and has proven to ensure water security by increasing soil moisture availability, decreasing surface runoff, decreasing soil erosion, increasing infiltration, and decreasing flood discharge. Land degradation is adversely affecting over 75% of the Earth's
Melku Dagnachew +5 more
wiley +1 more source
杂交狼尾草是一种优良的多年生禾本科牧草,具有很好的水土保持能力,但人们对其水土保持方面的定量研究较少。通过对杂交狼尾草草地植被的持水能力、土壤水分变化、土壤抗冲性、渗透性等指标的研究,探讨杂交狼尾草的水土保持能力。结果表明:杂交狼尾草的持水能力强,能明显增加土壤水分含量,提高土壤的抗冲性、渗透性,在三峡库区的水土保持工作中有着广阔的应用前景。
王凭青 段传人 王伯初 刘万钱 朱蠡庆
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为探明红壤坡地枯落物敷盖的保水作用及其机理,在江西省北部德安县第四纪红黏土母质发育的红壤坡地开展定位试验,以裸露坡地为对照,研究枯落物敷盖措施实施15 a后对0—60 cm土层土壤的持水性、供水性和水分有效性的影响。结果表明:赣北红壤坡地的土壤水分持水能力低,供水能力弱,有效水含量少,仅为9.0%~11.1%;枯落物敷盖处理的红壤坡地(0—30 cm)土壤持水能力高于裸露坡地;低吸力范围(<100 kPa)枯落物敷盖处理的下层(30—60 cm)土壤供水能力高于裸露坡地 ...
聂小飞 +5 more
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选择川西亚高山云杉人工林,模拟自然林窗形成,布置扩展面积分别为小(74 m~2)、中(109 m~2)、大(196 m~2)3个等级的林窗,探索不同疏伐强度对土壤结构及持水性能的影响,并结合细根生物量、土壤有机质含量等参数,试图揭示导致林窗式疏伐后土壤结构及持水性能差异的因素.结果表明,疏伐初期(1年),林窗的形成对表层(0-10 cm)土壤的孔隙状况及持水性能没有显著影响;随着时间的演替,各处理土壤结构及持水性能均得到不同程度的改善.疏伐后8年,小林窗、中林窗和大林窗表层土壤的容重较对照分别低17 ...
包维楷 +4 more
core +1 more source
为分析不同梯度盐渍土土壤的物理性质与水动力学性质变异状况,在江苏沿海连云港市徐圩新区开展了试验研究。对5种不同盐渍化级别土壤进行取样,测定其pH、ECe、容重、总孔隙度、含水率和饱和导水率等,分析不同级别滨海盐渍土壤物化特性参数和水动力学性质变化规律。结果表明:(1)不同级别盐渍土0—50 cm剖面土壤ECe先变小后增大,但40—50 cm剖面ECe明显大于0—10 cm剖面。非盐渍土和极重度盐渍土0—50 cm剖面土壤ECe变化较小,轻度盐渍土、中度盐渍土、重度盐渍土的0—50 ...
祝瑜 +6 more
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