Results 71 to 80 of about 664 (163)
Shuitu Baochi Xuebao, 2011 以山东寿光连作2,5,8,10年的大棚土壤为材料,临近露天麦地土壤为对照,研究土壤团聚体中交换性盐基离子组成变化与土壤团聚性关系。结果表明:交换性K+、Na+、Ca2+和Mg2+的平均含量在>0.25mm大团聚体中分布比较均匀,均高于在Mg2+>K+>Na+。同时表明,(K++Na+)/(Ca2++Mg2+)的比值随土壤团聚体粒径的减小而增大。土壤中盐基离子储量和贡献率主要由团聚体的质量含量所决定,>0.25mm的大团聚体贡献率可占88%～90%,其中以2～5mm团聚体储量最大。因此 ...
曾路生 +5 more
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Shuitu Baochi Xuebao, 2011 研究了子午岭林区七种植被类型土壤>0.25 mm水稳性团聚体含量、团聚体破坏率和水稳性团聚体分形维数随植被恢复的变化规律以及这3个指标随土壤有机碳含量增加的变化规律。结果表明:植被恢复对>0.25 mm水稳性团聚体含量、团聚体破坏率和水稳性团聚体分形维数的影响可以达到70 cm土层;除白羊草群落外,0-70 cm土层上>0.25 mm水稳性团聚体含量随植被恢复逐渐提高,团聚体破坏率和水稳性团聚体分形维数随植被恢复逐渐减小,土壤结构随植被恢复逐渐改善。>0.25 mm水稳性团聚体含量 ...
马帅 +4 more
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Shuitu Baochi Xuebao, 2020 土壤团聚体是土壤结构的基本单元，土壤水力侵蚀的微观描述即为土壤团聚体的破裂过程。研究表明：植物根系可以改变土壤的力学以及水文特征，促进土壤团聚体的形成和稳定。因此，对近20年国内外的相关研究成果进行较为系统的回顾，从根系对土壤团聚体的物理、生物、电化学作用3个研究视角，分析了植物根系对土壤团聚体形成的作用机制，提出了现有研究中存在的问题及研究趋势，这对深入认识植物根系对土壤团聚体的影响及其作用机制、发展根-土相互作用的土壤侵蚀过程模型具有重要的意义。
刘均阳, 周正朝, 苏雪萌
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Spatial Pattern and Influence Factor Analysis of Soil Organic Matter Based on the GeoDetector Model: Taking Liaoyang—Anshan Area as an Example [PDF]
Spatial pattern of organic matter distribution and its influencing factors in the study area can provide a decision-making basis for territorial spatial planning. The majority of previous studies in this area focused on the soil surface, and most of them
Cang GONG +8 more
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Shuitu Baochi Xuebao, 2023 为探究大气氮沉降增加导致的土壤团聚体结构变化规律及其对土壤水分入渗性能的影响,在贡嘎山针叶成熟林和中龄林内分别设计2种氮肥形态[(NH4)2SO4、KNO3]和4个浓度水平(0,10,20,40 kg/(hm2·a)N)的添加试验,研究不同形态大气氮沉降对亚高山森林土壤团聚体结构和土壤水分入渗特征的影响。结果表明:(1)随施氮量增加,中龄林土壤大团聚体含量逐渐增加,土壤持水量、孔隙度和水分稳定入渗率逐渐增大;成熟林土壤大团聚体含量、土壤持水量、孔隙度和水分稳定入渗率均表现出先增加后降低的趋势;(2 ...
郭海云, 王根绪, 孙守琴
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Adsorption of Heavy Metals Lead and Cadmium in Soil by Modified Lignite [PDF]
In this paper, the adsorption and resolution mechanism of heavy metals Pb2+ and Cd2+ by modified lignite were studied. Methods: Four single-factor gradient variables (pH value, amount of lignite, adsorption time, adsorption temperature) were designed to ...
Duanping XU +4 more
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Shuitu Baochi Xuebao, 2011 土壤团聚体是土壤结构的基本单元,对土壤物理化学性质及生物化学性质具有重要影响。通过湿筛法对新疆水稻土团聚体及其有机碳的变化进行研究。结果表明:稻田土壤总有机碳随着种植水稻时间的延长而增加,种植水稻100a土壤总有机碳比荒地的增加了28.35g/kg;荒地开垦种植水稻后,随着种稻时间的延长,土壤水稳性团聚体(>250μm)和微团聚体(53～250μm)显著增加,
唐光木 +6 more
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, 2004 本文总结了植被及其不同部分在控制水土流失中的作用 ,在此基础上总结了利用植被控制水土流失的方法措施和目前的研究热点 ,并提出现状研究中的不足和将来的研究前景。福建省重大科技项目 (项目编号 :2 0 0 2H0 0 ...
黄云凤
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The Impact of Litter Decomposition on Soil Organic Carbon Stability in Coastal Shelter Forests Under Thinning [PDF]
[Objective] To elucidate the characteristics of litter decomposition and changes in soil organic carbon (SOC) fractions under thinning, and to reveal the impact of litter decomposition on the stability of SOC in coastal shelter forests under thinning ...
DONG Zhi +5 more
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Evaluation of the Effectiveness of Soil Improvement Measures in Apple Orchards on the Loess Plateau: A Meta-Analysis [PDF]
[Objective] Soil acidification, structure and fertility degradation and poor water-holding capacities are common problems in the apple orchard on the Loess Plateau, effective soil improvement techniques are crucial for enhancing soil quality, and ...
DUAN Shunxia +3 more
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