Results 11 to 20 of about 429 (132)
Characteristics of Soil Aggregates and Organic Carbon Content for Ecological Restoration Slopes at Xiangjiaba Hydropower Station [PDF]
, 2023 [Objective] The effects of ecological engineering restoration technology on soil aggregate stability and organic carbon distribution were analyzed in order to provide a scientific basis for improving soil structure stability and carbon sink function of ...
Duan Xiaoming +4 more
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Shuitu Baochi Xuebao, 2021 采用X-ray computed tomography（CT）技术研究了果树行间不同油菜间作密度（CK：清耕；L：低密度间作；M：中密度间作；H：高密度间作）对土壤大孔隙特征参数的影响。结果表明：油菜间作改善了果树行间（0—60 cm）土壤大孔隙特征，各土层的土壤大孔隙数量、大孔隙面积、大孔隙度等参数分别较清耕显著提高（P 1 mm）在各土层间的数目多、差异小，并且在0—30 cm土壤剖面上的成圆率最高。中、高密度油菜间作的土壤大孔隙特征参数均优于清耕及低密度间作，而中密度间作的土壤大孔隙分布更均匀 ...
何娜娜 +4 more
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Shuitu Baochi Xuebao, 2023 为了明确农业生产过程中耕作方式对田间土壤孔隙结构及土壤水分运动特性的影响,以广西农地蔗田为研究对象,基于土壤切片技术分析研究免耕和垄耕2种典型耕作方式蔗田的田间土壤孔隙结构特征,并结合土柱模拟入渗试验,探究土壤孔隙结构对土壤水分运动的影响,进一步揭示孔隙结构与土壤水分运动特性之间的相互作用关系。结果表明:随着土层深度的增加,免耕蔗田孔隙形态以聚集的团块状分布为主,垄耕蔗田孔隙形态以条状分布为主。与免耕蔗田相比,垄耕蔗田的土壤总孔隙度和＞2.5 mm孔径的孔隙度分别增加32.5%和21.9 ...
刘俊杰 +5 more
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Shuitu Baochi Xuebao, 2023 以明确自然界中广泛存在的层状结构土壤孔隙分布特征为目的。选黄土高原典型坝地土壤剖面为研究对象,利用CT扫描技术分析耕作层、犁底层、心土层土壤三维结构,探讨层状土孔隙参数随土层结构变化及界面层孔隙特征。结果表明:(1)瘦长型孔隙(孔隙形状系数≤0.2)是各土层土壤孔隙的主要形态。各土层的孔隙参数具有明显差异。耕作层的总孔隙度最高,大孔隙(≥1 mm)分布较多;犁底层孔隙总数量最高,含有较多孤立的小孔隙(≥0.1~0.5 mm)和微小孔隙(≥0.06~0.1 mm),但连通性最差 ...
张佐源 +5 more
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Effects of Winter Irrigation on Soil Water-heat-salt Migration and Crop Growth During Freezing-Thawing Period in Qingtongxia Irrigation District of Ningxia [PDF]
, 2023 [Objective] The effects of winter irrigation on soil water-heat-salt migration and crop growth during the freezing-thawing period were analyzed in order to provide a scientific basis for controlling soil salinization, and to ensure food security ...
Han Yuping +4 more
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Effects of Desert Land Cultivation on Soil Aggregate Stability and Carbon Fixation [PDF]
, 2023 [Objective] The response of soil aggregate stability and organic carbon before and after land reclamation using different land use types were analyzed in order to provide a scientific theoretical basis for wasteland reclamation, vegetation restoration ...
Chen Xue +4 more
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Effects of Bio-based Compound Amendments on Overall Soil Fertility of Coastal Saline Soils [PDF]
, 2022 [Objective] The effects of bio-based composite amendments on the physicochemical properties and microbiota of saline soils in the Yellow River delta and the Northern Jiangsu mudflats were determined in order to provide a scientific reference for the ...
Gan Quanfeng +5 more
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Shuitu Baochi Xuebao, 2023 为探明生物结皮如何改善土壤物理性质从而促进水土保持,针对黄土高原风沙土和黄绵土上发育的藓结皮,以无结皮为对照,原状取样后分别使用高分辨率CT扫描仪和高精度土壤贯入仪测定其孔隙性状与穿透阻力,并构建结构方程模型剖析生物结皮对土壤孔隙度和穿透阻力的作用途径。结果表明:藓结皮发育改变土壤孔隙特征参数,并显著提高表层0—2 cm土壤总孔隙度(p＝0.01),在此土层内,风沙土和黄绵土上藓结皮的总孔隙度比无结皮分别增加1.62,2.12倍,且藓结皮的孔隙度随土层深度增加呈指数降低。藓结皮和无结皮的土壤面孔率在0 ...
余星兴 +4 more
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Numerical simulation of leakage and diffusion of buried pure hydrogen/hydrogen-doped natural gas pipeline [PDF]
, 2023 In order to study the diffusion characteristics of pure hydrogen/hydrogen-doped natural gas in the soil environment, a three-dimensional leakage model of the buried pure hydrogen/hydrogen-doped natural gas pipeline was established by Fluent software.
Baojin QI +3 more
core +1 more source
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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