Results 11 to 20 of about 623 (134)
Dynamic Simulation of Soil Moisture Under Typical Land Preparation in Semi-arid Loess Area Using HYDRUS-1D Model [PDF]
, 2023 [Objective] The dynamic characteristics of soil moisture under different land preparation measures were analyzed in order to provide a scientific basis for assessing the eco-hydrological benefits of slope land preparations and for promoting vegetation ...
Dong Hongxia, Wei Qiang, Zhang Qindi
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Shuitu Baochi Xuebao, 2022 通过定点监测刺槐林土壤水分含量,探究不同林龄刺槐林土壤水分分布与亏缺程度。采用空间代替时间的研究方法,选择10,15,25,40年人工刺槐林为研究对象,农地(0年)为对照,调查分析0—200 cm土层土壤水分分布情况。结果表明:各样地平均土壤含水量大小顺序为农地(18.80%)＞10年刺槐林(16.43%)＞15年刺槐林(15.47%)＞40年刺槐林(13.87%)＞25年刺槐林(13.38%);不同林龄刺槐林土壤水分均处于亏缺状态,随着林龄增加,土壤水分亏缺呈增大趋势,平均土壤水分亏缺程度为19.38%
费洪岩 +4 more
doaj
Spatiotemporal Pattern of Land Cover Types on Loess Plateau [PDF]
, 2023 [Objective] A long-term and high-precision land cover dataset was constructed for the Loess Plateau. The spatiotemporal pattern of land cover in 2001 and 2020 was analyzed in order to provide a scientific underpinning for initiatives concerning ...
Li Yu +5 more
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Shuitu Baochi Xuebao, 2003 对刺槐林、麻烁林、五角枫林、黄连木林、油松林、赤松林、侧柏林、刺槐麻烁混交林的枯落物持水性能及枯落物层下的表层土壤理化性状进行了研究。结果表明：枯落物的持水性能大小顺序为刺槐林＞黄连木林＞刺槐麻烁混交林＞五角枫林＞麻烁林＞侧柏林＞赤松林＞油松林；表层土壤理化性状的优劣顺序为黄连木林＞刺槐林＞刺槐麻烁混交林＞五角枫林＞麻烁林＞侧柏林＞赤松林＞油松林。
杨吉华 张永涛 李红云 夏江宝
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Advances in Research on Water-in-Water Emulsions Based on the Stabilization Mechanism of Pickering Emulsions [PDF]
, 2023 Water-in-water emulsions, which have a very low interfacial tension and a thick interfacial layer, are formed by two thermodynamically incompatible hydrophilic macromolecules in a certain proportion.
GOU Qingxia, YAO Xiaolin, WEI Xiangying, YUE Jianxiong, YUE Juan, LI Dan
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Accumulation Characteristics and Hydrological Effects of Litter in Mixed Robinia pseudoacacia Plantations [PDF]
[Objective] Studying the accumulation characteristics and hydrological effects of typical mixed Robinia pseudoacacia plantations is crucial for deeply investigating the water conservation capacity of artificial forests on the Loess Plateau.
CAO Zetao +5 more
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Shuitu Baochi Xuebao, 2002 晋西黄土丘陵沟壑区水土流失严重,气候干旱,生态环境恶劣,适应性和抗逆性很强的刺槐是该区重要的优良造林树种。建国以来,该区营造了大面积的刺槐林,但由于各立地类型的光、热、水、气、肥等条件不尽一致,其生长状况相差悬殊,有的甚至形成"小老树"。为了研究刺槐林的生态适宜性,在对不同立地条件下刺槐林生长状况调查的基础上,应用Verhanlst生长预测模型和模糊最优局势决策法进行了分析,发现刺槐林的生长状况与各立地条件的土壤水分变化基本一致,不同立地条件下刺槐林生长差异显著 ...
卫三平 李树怀 卫正新 秦旭峰 王力
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Shuitu Baochi Xuebao, 2003 总结了迄今为止世界范围内对刺槐人工林培育的经验和研究成果,并结合我国的 实际情况,分析了我们在刺槐形态学与环境、刺槐育种、造林、抚育以及刺槐人工林群落学 特征等方面存在的不足之处和盲点,提出了我国将来进一步研究刺槐的方向的建议.
彭鸿, 陈晓荣, 余仲东
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, 2012 目的优选野菊花中刺槐苷的水解工艺。方法采用均匀设计法,以高效液相色谱法(HPLC)测定野菊花中刺槐素含量,探讨影响刺槐素提取效率的因素,并筛选出最佳提取条件。结果最佳水解工艺为盐酸与药液比为5∶2,盐酸浓度3 mol/L,水解时间为3 h,水解温度为100℃。结论 HPLC法测定野菊花中刺槐素含量的方法,快速、可行。均匀设计法优选的野菊花中刺槐素提取工艺,操作简单,节约时间 ...
朱性海 +4 more
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Responses of Loess Ground with Different Slopes and Vegetation Covers to Rainfall Infiltration [PDF]
[Objective] To investigate the soil moisture response to rainfall in loess ground with different slopes and vegetation types. [Methods] Eight in-situ observation plots were established, including flat surfaces with bare soil, Artemisia cover, and Robinia
HU Xiangyang +6 more
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