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Titre du document / Document title

Biodynamic preparations : Short-term effects on crops, soils, and weed populations

Auteur(s) / Author(s)

CARPENTER-BOGGS Lynne (1) ; REGANOLD John P. (2) ; KENNEDY Ann C. (3) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) SDA-ARS North Central Soil Conservation Research Laboratory, 803 Iowa Avenue, Morris, MN 56267, ETATS-UNIS
(2) Dept. of Crop and Soil Sciences, 201 Johnson Hall, Washington State University, Pullman, WA 99164-6420, ETATS-UNIS
(3) USDA-ARS Land Management and Water Conservation Research Unit, P.O. Box 64621, 215 Johnson Hall, Washington State University, Pullman, WA 99164-6421, ETATS-UNIS

Résumé / Abstract

Biodynamic agriculture is an organic farming system that utilizes fermented herbal and mineral preparations as compost additives and field sprays. This study was conducted to determine whether biodynamic preparations affect lentil and wheat growth and yield, soil fertility, or weed populations in the short run. Each of four nutrient treatments, biodynamically prepared compost, non-biodynamic compost, mineral NPK fertilizer, and no fertilizer, were tested with and without biodynamic field sprays. Crop yield, crop quality, and soil fertility were similar in plots treated with mineral NPK fertilizers, biodynamic compost, or non-biodynamic compost. Use of compost raised soil pH from 6,0 without compost to 6.5 with compost. Compost application reduced the broadleaf weed population by 29% and reduced the grass weed population by 78%. Biodynamic sprays altered soil and grain N chemistry, but the effects are of unknown biological significance. Use of the biodynamic field sprays correlated with higher yield of lentil per unit plant biomass, lower grain C and crude protein contents, greater NO3- content in soft white spring wheat, and greater NH4+ content in soil. In general, soils and crops treated with biodynamic preparations showed few differences from those not treated. Application of composts with or without the preparations produced similar crop yields with lower weed pressure, compared with equal nutrients supplied by mineral fertilizer, but any additional short-term benefits from biodynamic preparations remain questionable.

Revue / Journal Title

American journal of alternative agriculture    ISSN  0889-1893   CODEN AJAAEZ 

Source / Source

2000, vol. 15, no3, pp. 110-118 (43 ref.)

Langue / Language

Anglais

Editeur / Publisher

Institute for Alternative Agriculture, Greenbelt, MD, ETATS-UNIS  (1986-2003) (Revue)

Mots-clés anglais / English Keywords

Organic agriculture

;

Growth

;

Yield

;

Soil fertility

;

Composting

;

Lens culinaris

;

Triticum aestivum

;

Weed

;

Compost

;

NPK fertilizer

;

Field experiment

;

Comparative study

;

BIODYNAMIC AGRICULTURE

;

Leguminosae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Gramineae

;

Monocotyledones

;

Farming system

;

Grain legume

;

Cereal crop

;

Organic amendment

;

Inorganic fertilizer

;

Mots-clés français / French Keywords

Agriculture biologique

;

Croissance

;

Rendement

;

Fertilité sol

;

Compostage

;

Lens culinaris

;

Triticum aestivum

;

Mauvaise herbe

;

Compost

;

Engrais NPK

;

Essai en champ

;

Etude comparative

;

AGRICULTURE BIODYNAMIQUE

;

Leguminosae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Gramineae

;

Monocotyledones

;

Système exploitation agricole

;

Légumineuse grain

;

Plante céréalière

;

Amendement organique

;

Engrais minéral

;

Mots-clés espagnols / Spanish Keywords

Agricultura biológica

;

Crecimiento

;

Rendimiento

;

Fertilidad suelo

;

Compostaje

;

Lens culinaris

;

Triticum aestivum

;

Malezas

;

Composta

;

Abono NPK

;

Ensayo en campo

;

Estudio comparativo

;

AGRICULTURA BIODINAMICA

;

Leguminosae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Gramineae

;

Monocotyledones

;

Sistema de explotación agrícola

;

Leguminosa grano

;

Planta cerealista

;

Enmienda orgánica

;

Fertilizante inorgánico

;

Localisation / Location

INIST-CNRS, Cote INIST : 22567, 35400009268484.0030

Nº notice refdoc (ud4) : 794876



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