My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in AJ

  1. Vol. 76 No. 3, p. 383-388
     
    Received: Mar 19, 1982
    Published: May, 1984


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2134/agronj1984.00021962007600030008x

Allelopathic Effects of Annual Weed Residues on Growth and Nutrient Uptake of Corn and Soybeans1

  1. P. C. Bhowmik and
  2. J. D. Doll2

Abstract

Abstract

Annual weeds have shown allelopathic potential in recent years. Few studies clearly compare effects of weed residues on growth inhibition and nutrient uptake in corn (Zea mays L.) and soybeans [Glycine max (L.) Merr.]. Therefore, the residues (aboveground biomass) of common lambsquarters (Chenopodium album L.), redroot pigweed (Amaranthus retroflexus L.), common ragweed (Ambrosia artemisifolia L.), velvetleaf (Abutilon theophrasti Medic.), and yellow foxtail [Setaria glauca (L.) Beauv.] were evaluated for their allelopathic effects on growth and uptake of N, P, and K in corn and soybeans in controlled environments. Weed residues in silica sand produced more inhibitory effects than the mixture of soil (Typic Agriudoll) and sand. The growth inhibition was more (8 to 14%) when the residues were incorporated in all soils than when they were surface applied. All residues except common ragweed reduced corn (6 to 20%) and soybean (2 to 20%) dry matter production. The inhibition or stimulation of N, P, and K uptake in both crops was not consistent and depended on the residue source, residue placement, or soil texture. Addition of supplemental N and P to various residues provided no alleviating effect on crop growth. Addition of P markedly enhanced P uptake without affecting total dry weights of both test species when compared to the controls. Yellow foxtail and common ragweed residues increased K uptake (21 to 48%) in corn but not in soybeans. The weed residues demonstrated an allelopathic inhibition of growth independent of N and P nutrition, and suggest that the inhibitory effects are not related to nutrient uptake.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .