INFLUENCE OF MIXED POPULATION DENSITIES OF SMOOTH PIGWEED (Amaranthus hybridus) AND COMMON PURSLANE (Portulaca oleracea) ON LETTUCE (Lactuca sativa) DRY MATTER ACCUMULATION

B. M. Santos, J. P. Morales-Payan and W. M. Stall

No 257012, 33rd Annual Meeting, July 6-12, 1997, Isabela, Puerto Rico from Caribbean Food Crops Society

Abstract: Interference trials were conducted under greenhouse conditions to determine the effects of mixed densities of smooth pigweed and common purslane on the initial growth of lettuce. Weeds were allowed to interfere with lettuce for 30 days before collecting plant dry matter of each species growing in the containers Densities used were 1, 2, 4, 6 and 8 weeds per container, along with the weed-free control. Monocultures of each weed were established along with the 50:50 proportion within each density, except for 1 plant per container. Interference of monostands of common purslane reduced lettuce dry matter accumulation more than smooth pigweed monostands within each density. Four common purslane plants per container reduced dry matter in as much as 6 or 8 smooth pigweed plants per container. In all cases, within a given density, 50:50 mixture treatments produced more lettuce dry matter than common purslane monocultures.

Keywords: Crop Production/Industries; Productivity Analysis (search for similar items in EconPapers)
Pages: 5
Date: 1997-07-06
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://ageconsearch.umn.edu/record/257012/files/33-64.pdf (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:ags:cfcs97:257012

DOI: 10.22004/ag.econ.257012

Access Statistics for this paper

More papers in 33rd Annual Meeting, July 6-12, 1997, Isabela, Puerto Rico from Caribbean Food Crops Society
Bibliographic data for series maintained by AgEcon Search ().