Early impacts of cotton and peanut cropping systems on selected soil chemical, physical, microbiological and biochemical properties.

Book Title: NA
Year Published: 2004
Month Published: NA
Author: Acosta-Martínez, V. ; Upchurch, D. R. ; Schubert, A. M. ; Porter, D. ; Wheeler, T.
Book Group Author: NA

This study investigated the impacts of cropping systems of cotton (Gossypium hirsutum L.; Ct) and peanut (Arachis hypogaea L.; Pt) on a Brownfield fine sandy soil (Loamy, mixed, superactive, thermic Arenic Aridic Paleustalfs) in west Texas, United States. Samples (0-12 cm) were taken 2 and 3 years after establishment of the plots from PtPtPt, CtCtPt and PtCtCt in March, June and September 2002, and in March 2003. Soil total N and aggregate stability were generally not different among the cropping systems. The pH of the soils was >8.0. Continuous peanut increased soil organic C, microbial biomass C (Cmic) and the activities of β-glucosidase, β-glucosaminidase, acid phosphatase, alkaline phosphatase, phosphodiesterase and arylsulfatase compared to the peanut-cotton rotations. The arylsulfatase activity of the fumigated field-moist soil and that resulting from the difference of the fumigated minus non-fumigated soil were greater in PtPtPt, but arylsulfatase activity of non-fumigated soil was unaffected by the cropping systems. Soil Cmic showed a different seasonal variation to enzyme activities during the study. Enzyme activities:microbial biomass ratios indicated that the microbial biomass may not have produced significant amounts of enzymes or that newly released enzymes did not become stabilized in the soil (i.e., due to its low clay and organic matter contents). Fungal (18:2ω6c and 18:1ω9c) and bacterial (15:0, a15:0, and a17:0) FAMEs were higher in PtPtPt than in CtCtPt or PtCtCt cropping systems. Our results suggest that the quality or quantity of residues returned to the soil under a peanut and cotton rotation did not impact the properties of this sandy soil after the first 3 years of this study.

Pages: 44 - 54
URL: http://0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20053153626&site=ehost-live
Volume: 40
Number: 1
Journal: Biology and Fertility of Soils
Journal ISO: NA
Organization: NA
Publisher: NA
ISSN: 0178-2762

acid phosphatase, aggregates, Alfisols, alkalinephosphatase, arylsulfatase, beta-glucosidase, biochemistry, clayfraction, cotton, crop residues, cropping systems, enzyme activity,groundnuts, nitrogen, nutrient content, organic carbon,phosphodiesterase I, sandy soils, seasonal variation, soil biology, soilchemical properties, soil enzymes, soil organic matter, soil pH, soilphysical properties, soil types, Texas, USA, Arachis hypogaea,Gossypium, Gossypium hirsutum, Arachis, Papilionoideae, Fabaceae,Fabales, dicotyledons, angiosperms, Spermatophyta, plants, eukaryotes,Malvaceae, Malvales, Gossypium, Southern Plains States of USA, WestSouth Central States of USA, Southern States of USA, USA, North America,America, Developed Countries, OECD Countries, Great Plains States ofUSA, Gulf States of USA, acid phosphomonoesterase, alkalinephosphomonoesterase, arylsulphatase, beta-glucosaminidase, chemicalproperties of soil, microbial biomass, organic matter in soil, peanuts,physical

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