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Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil

Authors
  • Steiner, Christoph1
  • Teixeira, Wenceslau G.2
  • Lehmann, Johannes3
  • Nehls, Thomas1
  • de Macêdo, Jeferson Luis Vasconcelos2
  • Blum, Winfried E. H.4
  • Zech, Wolfgang1
  • 1 University of Bayreuth, Institute of Soil Science and Soil Geography, Bayreuth, 95440, Germany , Bayreuth (Germany)
  • 2 Embrapa Amazonia Ocidental, CP 319, Manaus, AM, 69011-970, Brazil , Manaus (Brazil)
  • 3 Cornell University, Department of Crop and Soil Sciences, Ithaca, NY, 14853, USA , Ithaca (United States)
  • 4 University of Natural Resources and Applied Life Sciences (BOKU), Institute of Soil Research, Vienna, 1180, Austria , Vienna (Austria)
Type
Published Article
Journal
Plant and Soil
Publisher
Kluwer Academic Publishers
Publication Date
Feb 02, 2007
Volume
291
Issue
1-2
Pages
275–290
Identifiers
DOI: 10.1007/s11104-007-9193-9
Source
Springer Nature
Keywords
License
Yellow

Abstract

Application of organic fertilizers and charcoal increase nutrient stocks in the rooting zone of crops, reduce nutrient leaching and thus improve crop production on acid and highly weathered tropical soils. In a field trial near Manaus (Brazil) 15 different amendment combinations based on equal amounts of carbon (C) applied through chicken manure (CM), compost, charcoal, and forest litter were tested during four cropping cycles with rice (Oryza sativa L.) and sorghum (Sorghum bicolor L.) in five replicates. CM amendments resulted in the highest (P < 0.05) cumulative crop yield (12.4 Mg ha−1) over four seasons. Most importantly, surface soil pH, phosphorus (P), calcium (Ca), and magnesium (Mg) were significantly enhanced by CM. A single compost application produced fourfold more grain yield (P < 0.05) than plots mineral fertilized in split applications. Charcoal significantly improved plant growth and doubled grain production if fertilized with NPK in comparison to the NPK-fertilizer without charcoal (P < 0.05). The higher yields caused a significantly greater nutrient export in charcoal-amended fields, but available nutrients did not decrease to the same extent as on just mineral fertilized plots. Exchangeable soil aluminum (Al) was further reduced if mineral fertilizer was applied with charcoal (from 4.7 to 0 mg kg−1). The resilience of soil organic matter (SOM) in charcoal amended plots (8 and 4% soil C loss, mineral fertilized or not fertilized, respectively) indicates the refractory nature of charcoal in comparison to SOM losses over 20 months in CM (27%), compost amended (27%), and control plots (25% loss).

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