학술논문
四种环境材料单施对煤矿区土壤结构和性状的影响研究 / Effects of a single application of four environmental materials on soil structure and properties in a coal mining area
Document Type
Academic Journal
Author
Source
农业资源与环境学报 / Journal of Agricultural Resources and Environment. 41(1):72-82
Subject
Language
Chinese
ISSN
2095-6819
Abstract
为解决煤矿区土地复垦中表层土壤结构差、持水能力低和养分贫瘠等问题,通过土壤培养模拟试验,研究了单施聚丙烯酸钾、黑矾、生化腐植酸和煤基腐植酸等4种材料对土壤改良的效果,并确定了适宜的施用量.结果表明:与对照(CK)相比,4种材料中聚丙烯酸钾能显著降低土壤容重,提高孔隙度和田间持水量,其添加量5 g·kg-1施用7d时,容重较CK降低了14.02%,孔隙度、田间持水量分别提高了28.31%、54.32%;黑矾能降低土壤pH和速效养分,当添加量5 g·kg-1施用25d时,pH、有效磷、碱解氮和速效钾较CK分别降低了0.21、30.24%、56.81%、9.77%;两种腐植酸对土壤容重、田间持水量、pH、速效养分均有影响,添加8 g·kg-1生化腐植酸作用25d时,有效磷和碱解氮较CK提高了15.18%、55.83%,pH降低了0.38,而添加5 g·kg-1煤基腐植酸时,有效磷、碱解氮和速效钾较CK分别提高了12.38%、28.72%、11.47%.研究表明,4种材料能不同程度改善土壤结构、提升水分保持能力、增加速效养分含量.
The purpose of this study was to address the problems caused by poor surface soil structure,low water holding capacity,and nutrient depletion during land reclamation in a coal mining area.Potassium polyacrylate,black alum,biochemical humic acid,and coal-based humic acid were individually added to improve the properties of the soil,which were evaluated with a soil incubation simulation test.For the control(CK),no materials were added.This study investigated the effect of the four materials on soil parameters and determined their appropriate application rates.The results showed that potassium polyacrylate significantly reduced soil bulk density and increased porosity and field water-holding capacity;its addition at 5 g·kg-1 for 7 days reduced the soil bulk density by 14.02%and increased porosity and field water holding capacity by 28.31%and 54.32%,respectively,compared with those of the CK.Black alum application reduced the soil pH and available nutrients.When 5 g·kg-1 of black alum was added for 25 days,pH,available phosphorus,nitrogen,and potassium decreased by 0.21,30.24%,56.81%,and 9.77%,respectively,compared with those of the CK.The two kinds of humic acid affected soil bulk density,field capacity,pH,and available nutrients.The addition of 8 g·kg-1 biochemical humic acid for 25 days increased the available phosphorus and alkali-hydrolysable nitrogen by 15.18%and 55.83%,respectively,and the pH decreased by 0.38 compared with those of the CK.The addition of 5 g·kg-1 coal-based humic acid increased the available phosphorus,alkali-hydrolysable nitrogen,and available potassium by 12.38%,28.72%,and 11.47%,respectively,compared with those of CK.The results showed that the four materials improved the soil structure and water retention ability and increased the available nutrient content to different degrees.
The purpose of this study was to address the problems caused by poor surface soil structure,low water holding capacity,and nutrient depletion during land reclamation in a coal mining area.Potassium polyacrylate,black alum,biochemical humic acid,and coal-based humic acid were individually added to improve the properties of the soil,which were evaluated with a soil incubation simulation test.For the control(CK),no materials were added.This study investigated the effect of the four materials on soil parameters and determined their appropriate application rates.The results showed that potassium polyacrylate significantly reduced soil bulk density and increased porosity and field water-holding capacity;its addition at 5 g·kg-1 for 7 days reduced the soil bulk density by 14.02%and increased porosity and field water holding capacity by 28.31%and 54.32%,respectively,compared with those of the CK.Black alum application reduced the soil pH and available nutrients.When 5 g·kg-1 of black alum was added for 25 days,pH,available phosphorus,nitrogen,and potassium decreased by 0.21,30.24%,56.81%,and 9.77%,respectively,compared with those of the CK.The two kinds of humic acid affected soil bulk density,field capacity,pH,and available nutrients.The addition of 8 g·kg-1 biochemical humic acid for 25 days increased the available phosphorus and alkali-hydrolysable nitrogen by 15.18%and 55.83%,respectively,and the pH decreased by 0.38 compared with those of the CK.The addition of 5 g·kg-1 coal-based humic acid increased the available phosphorus,alkali-hydrolysable nitrogen,and available potassium by 12.38%,28.72%,and 11.47%,respectively,compared with those of CK.The results showed that the four materials improved the soil structure and water retention ability and increased the available nutrient content to different degrees.