Determination of Content of 6 Triterpenic Acids in Malusdoumeri Fruit by High-performance Liquid Chromatography [PDF]
A HPLC method was developed for the simultaneous determination of euscaphic acid, 2α,19α-dihydroxy-3-oxo-urs-12-en-28-oic acid, maslinic acid, corosolic acid, oleanic acid, and ursolic acid in Malus doumeri fruits.
Aihua CAI, Huazhen HUO, Yunchang XIE
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Shuitu Baochi Xuebao, 2008 对贵州中部喀斯特山区不同土地利用方式(阔叶林地、灌木林地、灌丛草地、耕地)对土壤、地表径流和浅层地下水进行采样与分析。结果表明,在喀斯特山区土地利用模式从阔叶林地—灌木林地—灌丛草地方向的演变过程中,土壤有机质、速效氮磷钾、交换性钙镁含量出现明显的下降,粘粒含量增加,土壤质量出现退化,耕地有机质含量明显低于林地和草地;耕地地表径流中SO42-,NH4 ,PO43-,COD均显著高于林地和草地;浅层地下水的SO42-,NH4 ,NO3-,PO43-,COD也显著增加;土地利用由林地变为耕地后 ...
苏跃 +5 more
doaj
Effects of Different Vegetation Restoration Measures on the Disintegration Characteristics of Eroded Degraded Land of Pinus massoniana in Red Soil Region [PDF]
[Objective] To investigate the characteristics of soil disintegration under different vegetation restoration measures in degraded land of Pinus massoniana, compare the improvement of soil disintegration in severely degraded P.
LIN Qiang +8 more
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A combined-method approach to trace submarine groundwater discharge from a coastal karst aquifer in Ireland. [PDF]
Hydrogeol J, 2020 Schuler P +4 more
europepmc +1 more source
Leaf anatomy of different peony and its environmental adaptability [PDF]
[Objective] We aim to investigate the morphological adaptation characteristics of peony in different habitats to the environment in the plain areas, and to provide references for peony conservation research and screening of high-quality germplasm ...
HE Songlin +5 more
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Shuitu Baochi Xuebao[目的] 西南地区水生态系统服务时空变化及其在不同地貌和地形下的影响因素研究能为该区域生态管理和可持续发展提供依据。[方法] 采用InVEST模型和通用土壤流失方程评估1992—2020年逐年产水量和土壤侵蚀量,探讨产水量和土壤侵蚀量的多维变化特征(时间、空间、高程),通过相对重要性分析方法量化分析气候变化和土地利用变化对水生态系统服务相对贡献率。[结果] (1)1992—2020年,西南地区产水量呈下降趋势,2002年为产水量变化的突变年,土壤侵蚀量呈上升趋势,1997年为土壤侵蚀量变化的突变年。(2)
唐霜, 朱崇京, 高洁, 卞鸿雁
doaj
Shuitu Baochi Xuebao, 2017 为探究喀斯特土壤有机碳分布特征及其对人为干扰的响应，挖掘了2 854个土壤剖面，采集了22 786个土壤样品，分析了贵州省不同土地利用方式下土壤有机碳分布规律；并结合贵州省石漠化防治规划，初步估算了石漠化防治工程的土壤碳增汇贡献。结果表明：贵州省土壤有机碳呈现含量高、密度小的特征。表层土壤（0—20 cm）有机碳平均含量25.07 g/kg，平均密度仅为4.27 kg/m2。不同用地类型土壤表层有机碳含量大小为灌木林地>乔灌木林地>灌草地>乔木林地>弃耕地与荒地>草地>水田>园地>旱地与坡耕地 ...
黄先飞, 周运超, 张珍明
doaj
Mechanisms controlling seasonal variations of hydrochemistry in a typical river of the Baiyangdian Basin [PDF]
To investigate the seasonal variation characteristics and controlling mechanism of the hydrochemistry of rivers that flow into the Baiyangdian Basin, the Angezhuang Reservoir—Zhongyishui River—Nanjuma River—Baigou Canal was selected to compare the ...
Rongtao MA +5 more
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Niches and community stability of dominant herbaceous species in the forest and creek ecotone of Dehang Geopark [PDF]
[Objective] The study aims to explore the characteristics of ecological niche, interspecific connectivity, and community stability of dominant species in the herbaceous community of the forest and creek ecotone in Dehang Geopark, with the expectation ...
CHEN Gongxi +4 more
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Study on characteristics of methane adsorption and thermodynamic in water-bearing shale [PDF]
Shale reservoirs generally contain water that has a significant impact on shale gas adsorption behavior and geological reserve evaluation. In order to explore the influence of water content on gas adsorption behavior in shale, an adsorption model ...
Bobo LI +5 more
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