| 粉煤灰充填复垦土壤理化性质分布特征及其对覆土厚度响应 |
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| 引用本文： | 张世文,葛畅,赵辉,郑印,沈强,周妍.粉煤灰充填复垦土壤理化性质分布特征及其对覆土厚度响应[J].安徽农业大学学报,2019,46(1):43-50. |
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| 作者姓名： | 张世文 葛畅 赵辉 郑印 沈强 周妍 |
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| 作者单位： | 安徽理工大学地球与环境学院,淮南,232001;临沂市国土资源局土地整理中心,临沂,276000;安徽理工大学测绘学院,淮南,232001 |
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| 基金项目： | 陕西省土地整治重点实验室开放基金（2018-ZD07）和国家重点研发计划项目（2016YFD0300801）共同资助。 |
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| 摘 要： | 以淮南市平圩电厂粉煤灰堆场复垦区为研究对象,采用经典统计和地统计学相结合的方法,从点和区域、水平与垂直等多维角度分析了不同覆土厚度下的复垦土壤主要理化性质分布特征,旨在揭示粉煤灰充填基质下复垦土壤理化性质分布特征及其与覆土厚度之间的响应关系。结果表明,随着覆土厚度的增加,土壤含水量均值呈现先增后减的趋势,各覆土厚度下土壤含水量基本在20%以上,覆土厚度20～30cm的土壤含水量最大,达到31.11%。在一定的覆土厚度下,含水量在粉煤灰重构剖面中间会出现一个突变层次,在土—灰界面将产生土壤水分的聚集。不同覆土厚度下表层土壤的容重出现明显的差异,随着覆土厚度的增加,土壤容重整体呈现上升趋势,覆土厚度40～60 cm时,土壤表层平均土壤容重达到1.75 g·cm-3,复垦后出现了不同程度的板结现象。不同覆土厚度下砂、粉和黏粒含量差异明显,总体上与该地区非重构土壤相似,基本属于粉砂质壤土。粉煤灰充填复垦后土壤颗粒组成由粉煤灰、覆土土源和覆土方式共同决定的,泥浆泵法覆土在不同水平间土壤颗粒组成差异较为明显。随着覆土厚度的增加,不同层次的有机质含量都有不同程度的提升,且提升程度与覆土厚度呈正相关。基于经验贝叶斯克里格法的复垦土壤含水量、容重、粉砂和有机质含量的RMSE分别为1.72、1.01、1.57和0.85;MSDR值分别为2.12、1.32、2.72和0.62,RMSE较小,预测精度较高,MSDR比较接近1,模型拟合效果较好。综合考虑各理化指标对覆土厚度的响应特征,冬小麦-夏玉米种植模式下覆土厚度40～50cm较为合理。经验贝叶斯克里格法比较适合粉煤灰充填复垦土壤理化指标空间预测。
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| 关 键 词： | 分布特征 粉煤灰充填 覆土厚度 复垦土壤 理化性质 |
The distribution characteristics of soil physicochemical properties of fly ash reclaimed soils their response to covering soil thickness |
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| ZHANG Shiwen,GE Chang,ZHAO Hui,ZHENG Yin,SHEN Qiang and ZHOU Yan.The distribution characteristics of soil physicochemical properties of fly ash reclaimed soils their response to covering soil thickness[J].Journal of Anhui Agricultural University,2019,46(1):43-50. |
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| Authors: | ZHANG Shiwen GE Chang ZHAO Hui ZHENG Yin SHEN Qiang and ZHOU Yan |
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| Institution: | College of Earth and Environmental Sciences, Anhui University of Science and Technology, Huainan 232001,College of Earth and Environmental Sciences, Anhui University of Science and Technology, Huainan 232001,Land Consolidation Center, Linyi Land and Resources Bureau, Linyi 276000,College of Earth and Environmental Sciences, Anhui University of Science and Technology, Huainan 232001,School of Surveying and Mapping, Anhui University of Science and Technology, Huainan 232001 and Land Consolidation and Rehabilitation Center, Ministry of Natural Resources, Beijing 100035 |
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| Abstract: | The reclamation area of ??Pingwei Power Plant in Huainan city was utilized as the research object. The paper analyzed distribution characteristics of the key physical and chemical properties of reclamation soil under different covering thickness from the point and area, horizontal and vertical aspects using classical statistics and empirical Bayes Kriging(EBK) method. The aim of the article was to reveal the distribution characteristics of the key elements of soil fertility under reclamation with fly ash filling and its response to the thickness of covering soil. The results showed that with the increase of soil thickness, the soil moisture content increased first and then decreased, which was above 20% for different covering soil thickness and reached 31.11% for 20-30 cm. Under certain overburden thickness, there will be a mutation level in the middle of the reclaimed profile of fly ash, and the soil moisture will be aggregated at the soil ash interface. With the increase of the soil thickness, soil bulk density increased, soil thickness of 40-60 cm, the average soil bulk density was 1.75 g·cm-3. After reclamation, there were different degrees of knot phenomenon. The difference of sand, silt and clay content was obvious under |
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| Keywords: | distribution characteristics fly ash filling thickness of cover soil reclaimed soil physicochemical properties |
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