Biological, ecological and cultural influences on the development and the distribution of redroot pigweed (Amaranthus retroflexus L.)
1988
Bachthaler, G. (Bayerische Landesanstalt fuer Bodenkultur und Pflanzenbau, Muenchen (Germany, F.R.)) | Ullsperger, A. | Kees, H.
The paper reports about the influence of different ecological factors and plant production on the development and the distribution of redroot pigweed (Amaranthus retroflexus L.) as weed in the Federal Republic of Germany. This weed species originally limited on warm locations of southern Germany, has extended with in the expansion of maize cultivation to northern regions of Germany. The spreading of Amaranthus retroflexus mostly in root crops and maize has intensified since some years because of local selections of triazin-resistent biotyps. Amaranthus retroflexus is a late germinating weed and needs a full exposure to light during its slow juvenile growth in crop formation. Amaranthus retroflexus grows especially well on fertile soils and as a nitrophil weed species it demands a high level of nitrogen content in the soil. The seed formation potential and the longevity of the seeds of Amaranthus retroflexus lead to an enduring infestation of the soil. The C4-Amarant-plant well endures continuous draught
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