Results 21 to 30 of about 237 (145)
Shuitu Baochi Xuebao, 2011 模拟森林凋落物淋洗液中苹果酸/盐浓度范围,研究不同浓度苹果酸/盐对风干暗棕壤中磷有效性的影响及机制,同时采用盆栽试验,在自然暗棕壤中对苹果酸/盐提高磷的有效性进行验证,并探讨苹果酸/盐对落叶松和水曲柳幼苗吸收运输磷素养分的影响。结果表明:苹果酸/盐溶液显著促进A1层和B层风干暗棕壤磷的活化,释放量随浓度增加而增大,但B层释放效应较弱。对A1层和B层风干暗棕壤磷的释放作用苹果酸盐强于同浓度的苹果酸,因此推断,苹果酸/盐促进暗棕壤磷释放的主要机理在于苹果酸阴离子反应。苹果酸/盐对暗棕壤磷的释放具有累加性 ...
宋金凤 +5 more
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Distribution Characteristics and Coupling Relationship Between Soil Erosion and Hydrologic and Sediment Connectivity in Changchong River Basin [PDF]
[Objective] To clarify the distribution characteristics and coupling relationship between soil erosion and hydrologic and sediment connectivity in Changchong River Basin, and to provide basis for soil erosion control and soil erosion prevention in this ...
LI Jianing +4 more
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Shuitu Baochi Xuebao, 2006 棕壤对铜的吸附特性以及土壤条件对吸附的影响进行了研究，结果表明，棕壤对铜的吸附随溶液中铜的平衡浓度增加而增加，但在高浓度时增幅渐缓，与处于相同地区的褐土相比棕壤的吸附相对较弱，其吸附可用Langmiur、Frundlich、Temkin及米氏方程进行描述。土壤酸度增强，棕壤对铜的吸附降低，用H^＋浓度对Frundlich方程进行修饰，能更好地描述铜的吸附状况。此外，离子强度、陪伴离子对吸附都有影响，随离子强度增加及高价陪伴离子比例的上升吸附减弱。
李文庆, 张民, 束怀瑞
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Dianci bileiqi, 2000 棕釉一般是以化工原料工业氧化铁、工业氧化铬、工业氧化锰为着色剂。为了使棕釉成本降低 ,产生较好的经济效益 ,对用红壤土取代棕釉中的氧化铁进行了试验 ...
肖建国
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Shuitu Baochi Xuebao, 2019 盆栽试验条件下，通过外源添加DBP/DEHP制成0，20，50，100，200 mg/kg的浓度梯度，来研究PAEs对烟草生长的影响及其在土壤—烟草系统的累积特征。结果表明：外源DBP/DEHP的添加对烟草地上部生物量和茎粗无显著影响，烟草株高随外源DBP/DEHP浓度的增加呈现不同的变化趋势，其中黄棕壤烟草株高显著降低，红壤的显著增加，而黄壤的无变化）黄壤根系活力随外源DBP/DEHP浓度先增高后降低，而黄棕壤和红壤的无显著变化。DBP/DEHP浓度对部分烟草抗氧化酶活性有显著影响 ...
张欣 +5 more
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Æ E Æ Å – Reshaping the Role of Træna Fishermen
, 2022 This diploma project aims to strengthen the viability of Træna’s community by proposing an ocean research facility in the archipelago, enabling the next generation of local fishermen to collect oceanographic data while working at sea. The idea of the fisherman as oceanographer is inextricably linked to the architectural program on the island of ...
openaire +1 more source
Relationship between riparian plant diversity and soil factors in the middle and lower reaches of the Yellow River [PDF]
[Objective] The relationship between species diversity and soil factors in riparian zone is important to maintain the stability of riparian ecosystems. The purpose of the study is to reveal the relationship between species diversity and soil factors in
LI Ya +3 more
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Shuitu Baochi Xuebao, 2020 紫色土中存在的岩屑显著影响土壤水分扩散。以往研究主要集中在 > 2 mm岩屑上而忽视了 < 2 mm岩屑的作用。因此，探讨 > 2 mm岩屑对紫色土水分扩散的影响基础上，明确 < 2 mm岩屑的作用对完善含岩屑紫色土水分扩散规律的研究具有重要的意义，从而为土壤水动力学模型的构建提供理论依据。以四川盆地紫色页岩发育的暗棕紫泥土和泥岩发育的红棕紫泥土为研究对象，设置3种岩屑粒径（0.25~2，2~5，5~10 mm）和4种岩屑含量（0，30%，50%，70%），利用水平土柱吸渗法测定含岩屑土壤湿润锋变化特征、
李江文 +4 more
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Material Evidence Analysis and Regional Classification and Identification of Soil Based on X-ray Fluorescence Spectrometry and X-ray Diffraction [PDF]
In the field of forensic science identification, geochemical-related materials such as soils and rocks were important sources of material evidence. In actual case analysis, the information provided by material evidence often pointed to unknown areas ...
Enhao ZHAO +6 more
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Shuitu Baochi Xuebao, 2008 通过土壤样品的室内培养,运用三库一级动力学理论,分析了沼泽土、草甸土、普通黄棕壤和棕色石灰土4种土壤有机碳库容大小、各碳库平均周转时间及分解动态。结果表明,4种土壤剖面表层和中层有机碳含量分别为8.48~24.53 g/kg,4.02~16.77 g/kg;活性碳占总有机碳含量的0.99%~5.01%,1.31%~1.91%,平均周转时间分别为8.8~14.3 d,10.4~16.5 d;缓效性碳占总有机碳含量的15.88%~59.04%,20.43%~48.36%,平均周转时间分别为1.3~29.1 ...
SHI, CHEN, PAN, SUN, LI, TI, ZHANG
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