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COMPETITION BETWEEN PLANTS OF COCKSFOOT ( DACTYLIS GLOMERATA ) GROWN FOR SEED
Author(s) -
Lambert D. A.
Publication year - 1968
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1968.tb00586.x
Subject(s) - edaphic , dactylis glomerata , competition (biology) , biology , agronomy , plant ecology , botany , poaceae , ecology , soil water
In each of a series of sub‐divided containers, two plants of cocksfoot ( Dactylis glomerata ) were planted in one of four arrangements to study the effects of: (a) no competition; (b) aerial competition, considered to be competition for light; (c) edaphic competition, considered to be competition for nitrogen; (d) full (aerial plus edaphic) competition, for light and N. The weight of seed produced per plant was reduced by aerial compeition, but not by edaphic competition, except where aerial competition also existed. With the exception of the seed, the weights of the components of the plants at harvest were reduced substantially by edaphic competition. The concentration of N in the various parts of the plant varied considerably, but only in the culms was it significantly affected by treatment so that the uptake of N was approximately proportional to the weight of the plant. Edaphic competiton gave most tillers per plant and full competition least. Aerial competition decreased the number of ears per plant.