Yao Linjun, Anne Naeth M
Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada; School of Land Science and Technology, University of Geosciences, Beijing, China.
Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada.
Ecotoxicol Environ Saf. 2015 Oct;120:326-33. doi: 10.1016/j.ecoenv.2015.06.021. Epub 2015 Jun 20.
Use of drilling waste generated from the oil and gas industry for land reclamation has potential to be a practical and economical means to improve soil fertility and to decrease landfills. A four month greenhouse experiment with common barley (Hordeum vulgare L.) on three different textured soils was conducted to determine soil and plant response to incorporated or sprayed potassium silicate drilling fluid (PSDF). Two PSDF types (used once, used twice) were applied at six rates (10, 20, 30, 40, 60, 120m(3)ha(-1)) as twelve PSDF amendments plus a control (non PSDF). Effects of PSDF amendment on plant properties were significant, and varied through physiological growth stages. Barley emergence and below ground biomass were greater with used once than used twice PSDF at the same application rate in clay loam soil. Used twice PSDF at highest rates significantly increased barley above ground biomass relative to the control in loam and sand soil. All PSDF treatments significantly increased available potassium relative to the control in all three soils. Soil electrical conductivity and sodium adsorption ratio increased with PSDF addition, but not to levels detrimental to barley. Soil quality rated fair to poor with PSDF amendments in clay loam, and reduced plant performance at the highest rate, suggesting a threshold beyond which conditions are compromised with PSDF utilization. PSDF application method did not significantly affect plant and soil responses. This initial greenhouse research demonstrates that PSDF has potential as a soil amendment for reclamation, with consideration of soil properties and plant species tolerances to determine PSDF types and rates to be used.
利用石油和天然气行业产生的钻井废弃物进行土地复垦，有可能成为提高土壤肥力和减少垃圾填埋场的一种实用且经济的方法。进行了一项为期四个月的温室试验，在三种不同质地的土壤上种植普通大麦（Hordeum vulgare L.），以确定土壤和植物对掺入或喷洒硅酸钾钻井液（PSDF）的反应。两种类型的PSDF（使用一次、使用两次）以六种施用量（10、20、30、40、60、120m³ha⁻¹）作为十二种PSDF改良剂外加一个对照（不使用PSDF）进行施用。PSDF改良剂对植物特性的影响显著，且在生理生长阶段有所不同。在粘壤土中，相同施用量下，使用一次的PSDF比使用两次的PSDF更有利于大麦出苗和地下生物量的增加。在壤土和砂土中，最高施用量下使用两次的PSDF相对于对照显著增加了大麦地上生物量。所有PSDF处理相对于对照在所有三种土壤中均显著增加了有效钾含量。随着PSDF的添加，土壤电导率和钠吸附率增加，但未达到对大麦有害的水平。在粘壤土中，PSDF改良剂使土壤质量评定为中等至较差，且最高施用量下植物性能下降，这表明存在一个阈值，超过该阈值，PSDF的利用会损害土壤条件。PSDF的施用方法对植物和土壤反应没有显著影响。这项初步的温室研究表明，考虑到土壤特性和植物物种耐受性以确定PSDF的类型和使用量，PSDF有潜力作为一种用于土地复垦的土壤改良剂。
