Results 71 to 80 of about 2,306 (150)
Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration [PDF]
[Objective] Research on the preferential flow characteristics triggered by cracks in coal mining subsidence areas can provide support for scientific and rational development of water resource management and ecological management practice in the mining ...
DAI Bin +4 more
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Relation between soil salinity in intertidal zone and electric conductivity [PDF]
, 2003 以5∶1的水土质量比浸提潮间带土壤,质量法测定的土壤盐度(质量分数),与电导法测定的稀释了5倍的土壤浸提液(5∶1水土质量比)的电导率值之间有极显著的相关性。质量法实测的土壤盐度与电导率计算的土壤盐度之间的相对误差多在5%以下。因此,用电导法测定潮间带土壤盐度不失为一种简便、快速的方法,尤其是样品数较多时更可节约时间。 【英文摘要】 There was significantly correlation between soil salinity in intertidal zone obtained
庄铁诚 +3 more
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Influence of mining-induced ground fissures on soil infiltration characteristics and its erosion effect in coal mining area of northern Shaanxi in the middle reaches of the Yellow River [PDF]
Cracking the soil and water loss effects of mining-induced surface fissures in the coal mining area of the middle reaches of the Yellow River is of great significance for ecological environment protection and high-quality development in the coal mining ...
Baodeng CHEN +6 more
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Shuitu Baochi Xuebao, 2023 为探究不同整地措施下梯田果园土壤质量的变化,以赣南宁都县小洋小流域脐橙果园开发示范区内的3种典型坡面(优化整地Ty、传统整地Tc、撂荒地CK)为研究对象,采用主成分分析法(principal component analysis,PCA)筛选最小数据集指标,对该地区土壤质量进行评价。结果表明:(1)由全量数据集(total data set,TDS)和最小数据数据集(minimum data set,MDS)计算的土壤质量指数存在显著正相关关系,R2=0.604 ...
李雨晨 +6 more
doaj
Effects of PBAT on Soil Water and Salt in Maize Root Zone and Maize Yield in Saline-alkali Land [PDF]
[Objective] In order to reduce soil pollution caused by plastic film, the application effect of using PBAT fully biodegradable plastic film instead of ordinary PE plastic film combined with drip irrigation to grow maize in mild secondary salinized soil ...
HOU Jiana +6 more
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Shuitu Baochi Xuebao, 2018 为探究东祁连山不同干扰高寒草地土壤养分及其生态化学计量学特征时空变化特征规律。研究了2017年8月在东祁连山不同干扰高寒草地土壤养分含量及其生态计量学特征，以及与2003年和2011年在相同地点、相同研究方法对该地区的土壤理化性质进行比较。结果表明：（1）在同一干扰生境不同土层下，土壤pH、电导率、含水量、土壤全量和速效养分均随着土层深度增加而逐渐减小，变化各异；在同一土层不同干扰生境下土壤养分间变化差异各不相同。（2）不同干扰生境土壤C/N为7.64~18.21，与我国陆地土壤平均值（10~12 ...
李海云 +7 more
doaj
Shuitu Baochi Xuebao, 2004 在杏园进行覆草对土壤肥力和杏产量与品质的影响研究表明：覆草能有效地稳定土壤温度，保持和提高土壤水分；降低土壤容重，增加土壤总孔隙度和通气孔度．减少无效孔度；增加土壤有机质和养分含量，改善果树营养，提高杏产量和品质。
刘建新
doaj +2 more sources
Shuitu Baochi Xuebao, 2019 通过田间小区试验，分析了不同用量的生物炭处理下（0，10，20，30，40 t/hm2）0—17，17—29 cm土层土壤的理化性质、重金属钝化及酶活性的影响。采用IFI（土壤肥力综合质量指数）评价了土壤肥力状况。结果表明：施用生物炭可以改善红壤的理化性状，降低土壤容重，提高土壤的孔隙度、饱和含水量、pH、CEC、有机质、有效磷、铵态氮和全氮及DOC含量）同时提高土壤脲酶、过氧化氢酶和蔗糖酶活性。土壤有效态Cd和Pb含量均随生物炭施用量的增加而减少）而有效态As含量则随生物炭施用量的增加呈先增后减的趋势，
郭碧林 +4 more
doaj
Some Impacts of Egret Colonies on the Heronry Soils Nutrition and Heavy Metal level [PDF]
, 2009 对厦门白鹭自然保护区鸡屿岛上的鹭类集群营巢地的表层土壤进行测定，比较繁殖前营巢地、繁殖后的营巢地及非营巢地土壤当中的营养元素全氮(N)、全磷(P)、全钾(K)的含量，以及重金属元素铜(Cu)、锌(Zn)、铬(Cr)、镉(Cd)的含量.土壤样品用微波消化法消化，土壤氮用凯氏定氮法测定，土壤磷用钼蓝比色法测定，土壤钾、铜、锌、镉、铬用原子吸收法测定。实验测得，繁殖前营巢地土壤全氮百分含量为0.038±0.006；全磷百分含量为0.086±0.015；全钾百分含量为1.049±0.048 ...
李伟
core
Research on soil improvement and engineering application under mixed application of environmental materials in alpine mining areas [PDF]
To address the issues of inadequate topsoil structure, soil erosion, and low soil fertility in the reclamation of alpine mining areas. Taking Qinghai West Copper Mine as an example, this study investigates the impact of three materials—sheep manure(A ...
Jie REN +4 more
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