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ARS Home Plains Area Lubbock, Texas Cropping Systems Research Laboratory Wind Erosion and Water Conservation Research Research Publications at this Location





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Title:   Author  item
                                            Acosta-Martinez, Veronicaitem
                                            Rowland, Dianeitem
                                            Sorensen, Ronald

                                                         - *Ron*item
                                            Yeater, Kathleen
  Submitted to: International Soil Conservation Organization Conference Abstracts
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 5/18/2008
                                    Publication  Date: 5/23/2008
                                    Citation: Acosta Martinez, V., Rowland, D., Sorensen, R.B., Yeater, K.M. 2008. Microbial community structure and functionality under peanut based cropping systems in a sandy soil[abstract]. International Soil Conservation Organization Conference. Budapest, Hungary. May 18-23, 2008.Interpretive Summary:
                                Technical Abstract: Little information is available on soil microbial and biochemical properties, important for understanding nutrient cycling and organic matter (OM) dynamics, as affected by different peanut (Arachis hypogaea L.) cropping systems and how they relate to soil functioning.  Peanut is typically produced in sandy soils, which have lower numbers and diversity of microbial populations and nutrient availability compared to soils with higher clay and OM contents.  Thus, we investigated the properties of a loamy sand (fine-loamy, kaolinitic, thermic Plinthic Kandiudults) in Georgia, which is first in peanut production in U.S., after 5 and 8 years under continuous cotton (Gossypium hirsutum, L) (CtCtCt), cotton-cotton-peanut (CtCtPt), corn (Zea mays L.)-peanut-cotton (CrPtCt), peanut-peanut-cotton (PtPtCt), and continuous peanut (PtPtPt).  Soil organic carbon, phosphatases activities, and fungal and bacterial populations were higher under peanut-based cropping systems (PtPtPt, PtPtCt and CrPtCt) than under cotton-based cropping systems (CtCtCt and CtCtPt).  The activities of glycosidases involved in C cycling were more sensitive to the cropping systems than phosphastases, and showed a distinctive cropping system separation: PtPtPt=CrPtCt>PtPtCt>CtCtPt>CtCtCt. This study demonstrated distinctive positive effects of peanut based crop rotations (i.e., CrPtCt and PtPtCt) on organic matter and the microbial component of this sandy soil that should be considered in management decisions targeting the selection of cropping systems for peanut production to maintain and/or improve soil quality, functionality, and sustainability of agricultural production.


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