EFFECTS OF MINE WATER IRRIGATION ON VERTICAL DISTRIBUTION OF SOIL NUTRIENTS, SALTS AND METALS

IF 0.6 4区环境科学与生态学 Q4 ECOLOGY

Applied Ecology and Environmental Research Pub Date : 2023-01-01 DOI:10.15666/aeer/2104_34833496

Y. Zhao, Shuanwang Qi, Z. Bao, Z. Liu, Bao-guo Ma

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Abstract

. In North China, the shortage of water resources is one of the main restricting factors of agricultural production. In order to alleviate the two problems of agricultural water shortage and mine water discharge and promote the safe utilization of mine water resources. In this paper, the soil column test was used to study the effects of different models of mine water irrigation on the vertical distribution of soil nutrients, salinity and metals. The results show that mine water irrigation can improve soil fertility, and increase the risk of soil and groundwater pollution; mine water irrigation can increase soil salinity, the contents of K + , Na + , Ca 2+ , Mg 2+ , Cl - and SO 4 2-increased significantly in 0-10 cm and 60-80 cm soil layers, which did not cause soil salinization and alkalization in a short time, and the pH value of soil was not affected by irrigation water quality; mine water irrigation increased the concentrations of Cd and Pb in soil, which accumulated most obviously in 0-20 cm soil layer, which caused soil Cd exceeding the secondary soil environmental standard (Cd = 1.00 mg·kg -1 ); the mixed irrigation (mine water and clean water) and rotational irrigation could reduce the pollution risk of nitrogen of groundwater, soil salinization, alkalization, Cd and Pb metals.

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矿井水灌溉对土壤养分、盐分和金属垂直分布的影响

。在华北地区，水资源短缺是制约农业生产的主要因素之一。为了缓解农业用水短缺和矿山排水两大问题，促进矿山水资源的安全利用。本文通过土柱试验，研究了不同矿井水灌溉模式对土壤养分、盐分和金属垂直分布的影响。结果表明:矿井水灌溉可以提高土壤肥力，增加土壤和地下水污染的风险;矿井水灌溉能提高土壤盐分，在0 ~ 10 cm和60 ~ 80 cm土层中K +、Na +、ca2 +、Mg +、Cl -和so4 -含量显著增加，在短时间内不引起土壤盐碱化，土壤pH值不受灌溉水质的影响;矿井水灌溉增加了土壤中Cd和Pb的浓度，其中0 ~ 20 cm土层积累最为明显，导致土壤Cd超过了土壤二级环境标准(Cd = 1.00 mg·kg -1);混合灌溉(矿水和清水)和轮灌可以降低地下水氮污染风险，降低土壤盐碱化、碱化风险，降低镉、铅金属污染风险。

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来源期刊

Applied Ecology and Environmental Research ECOLOGY-ENVIRONMENTAL SCIENCES

CiteScore

1.40

自引率

14.30%

发文量

104

审稿时长

14 months

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