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Early Growth in Annual and Perennial Ryegrass 1
Author(s) -
Barbour Michael
Publication year - 1967
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1967.00021962005900020026x
Subject(s) - perennial plant , lolium perenne , agronomy , biology , sowing , growing season , annual plant , photosynthesis , chlorophyll , botany
Two stages of early growth are described for Lolium temulentum , an annual, and L. perenne , a perennial species of ryegrass. The first stage, from time of sowing to about the ninth day, is one of rapid growth. The second stage, which may be indicative of the rest of the growing season, is one of slower growth in which the annual has a higher photosynthesis and respiration rate, a larger root system, and a lower leaf starch content than does the perennial. Chlorophyll and water content of leaves of the two species are similar. The annual germinates earlier.