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Comparison of nitrogen use by two population densities of eastern black nightshade (Solanum ptycanthum)

Published online by Cambridge University Press:  20 January 2017

Elizabeth A. Wahle  and
John B. Masiunas
Elizabeth A. Wahle
Affiliation:
University of Illinois Extension, Edwardsville, IL 62026
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Abstract

Greenhouse hydroponic and field experiments were conducted to determine the effect of nitrogen (N) fertilizer on eastern black nightshade growth and N content. After 4 wk in hydroponics, the greatest shoot dry mass occurred in the 5 or 10 mM nitrate treatments. An exponential model was strongly correlated with eastern black nightshade root and shoot growth in the 5 or 10 mM nitrate treatments. Eastern black nightshade reached the exponential stage of growth approximately 21 d after transfer to the nitrate treatments. Root dry mass was only 10% of shoot biomass. There was a substantial increase in height and growth rate when plants were fertilized with 168 kg N ha−1. Eastern black nightshade was at its maximum growth 12 wk after planting, and fresh mass increased with N up to 336 kg N ha−1, the greatest N concentration in the study. The greatest N content was in the upper leaves and the least in the lower stem. These results indicate that eastern black nightshade growth is favored by high rates of N.

Keywords

Eastern black nightshade, Solanum ptycanthum Dun. SOLPTCompetitionnutrientsgrowth analysis
Type
Research Article
Information
Weed Science , Volume 51 , Issue 3 , June 2003 , pp. 394 - 401
Copyright
Copyright © Weed Science Society of America 

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