ORIGINAL ARTICLE
Competition between ryegrass and annual bluegrass due to the establishment time and the shoots and roots strata
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André Ulguim 1, A,E-F
 
 
 
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1
Crop Protection, Federal University of Santa Maria, Santa Maria, Brazil
2
Biology, Federal University of Santa Maria, Santa Maria, Brazil
3
Agrarian Sciences, Integrated Regional University, Santiago, Brazil
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
CORRESPONDING AUTHOR
Roberto Costa Avila Neto   

Crop Protection, Federal University of Santa Maria, Santa Maria, Brazil
Submission date: 2022-08-04
Acceptance date: 2022-09-29
Online publication date: 2022-11-25
 
 
HIGHLIGHTS
  • Competitititon between a forage crop and a winter weed
  • The ryegrass established after the population of the Annual bluegrass showed less competitive capacity
  • The negative interference of the Annual bluegrass in ryegrass is greater when the plants fully compete for the resources
KEYWORDS
TOPICS
ABSTRACT
Ryegrass (Lolium multiflorum Lam.) is an important forage and suffers negative interference from weeds, like annual bluegrass (Poa annua L.). The competition of annual bluegrass with ryegrass can interfere with crop growth and reduce the amount of forage for animal feed. We aimed to evaluate the interference of annual bluegrass in ryegrass crops through the differentiation of niche and establishment. Two experiments were carried out testing different competition strata (shoot, root, and both) and ryegrass establishment with or after annual bluegrass, with increasing populations of annual bluegrass (0, 35, 139, 279, 419 plants m–2). The variables were plant height, height length of the root system, stem diameter, and fresh weight of shoot and root systems of ryegrass. The negative interference of growing populations of annual bluegrass occurred when in competition for the shoot and root systems of ryegrass. The fresh weight of shoots and roots were impacted when competing for the same strata. Ryegrass, established after the population of annual bluegrass, showed less competitive capacity. The negative interference of annual bluegrass in ryegrass is greater when the plants fully compete for the resources of the environment, and when the ryegrass establishes after the competitor.
RESPONSIBLE EDITOR
Tomasz Sekutowski
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
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