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作者

来源

URBAN FORESTRY & URBAN GREENING,Vol.24,P.149-156

语言

英文

关键字

Scoop & Dump; Soil health; Soil remediation; Soil quality; Soil active carbon; Soil potentially mineralizable nitrogen; AVAILABLE WATER CAPACITY; LAND-DEVELOPMENT; ORGANIC-MATTER; AGGREGATE STABILITY; MICROBIAL BIOMASS; QUALITY; CARBON; REHABILITATION; PL

作者单位

[Sax, Miles Schwartz; Bassuk, Nina; Rakow, Don] Cornell Univ, Sch Integrat Plant Sci, Sect Hort, 134 Plant Sci Bldg, Ithaca, NY 14853 USA. [van Es, Harold] Cornell Univ, Sch Integrat Plant Sci, Sect Crop & Soil Sci, 134 Plant Sci Bldg, Ithaca, NY 14853 USA. Sax, MS (reprint author), Cornell Univ, Sch Integrat Plant Sci, Sect Hort, 134 Plant Sci Bldg, Ithaca, NY 14853 USA. E-Mail: ms2785@cornell.edu; nlb2@cornell.edu; hmvl@cornell.edu; dr14@cornell.edu

摘要

On the Cornell University campus a long-term study has measured the impacts of a soil remediation strategy on plant growth and soil quality using the Cornell Soil Health Test. The Scoop & Dump (S & D) process of soil remediation consists of physically fracturing compacted urban soils, incorporating large quantities (33% by volume) of compost with the use of a backhoe, and annually top dressing with mulch. This study was designed to investigate the impact of this remediation technique for the amelioration of compaction and degradation of soils in the urbanized environment. The study finds that over a 12-year period remediated soils exhibit improved (reduced) bulk density (R-2 = 0.50) (P < .0001) (n = 30), increased active carbon (R2 = 0.61) (P < .0001) (n = 30) and increased potentially mineralizable nitrogen (R2 = 0.61) (P < .0001) (n = 30). When S & D soils were compared to unamended (Unam) soils, improvements were found in aggregate stability (S & D = 72.41%, Unam = 34.90%, P < .0001, n = 30), available water holding capacity (S & D = 0.22%, Unam = 0.15%, P < .0001, n = 30), total organic matter (S & D = 8.43%, Unam = 3.23%, P < .0001, n = 30), potentially mineralizable nitrogen (S & D = 27.53 mg/kg, Unam = 3.11 mg/kg, P = 0.0005, n = 30), active carbon (S & D = 1022.47 mg/kg, Unam = 361.60 mg/kg, P < .0001, n = 30), and reduction in bulk density (S & D = 0.89 g/cm(3), Unam = 1.47 g/cm(3), P < .0001, n = 30). Application of the S & D process provides an alternative to using specified soils and has potential for improving long term soil quality using locally sourced materials and simple methods.