Ecology of Chrysopogon aucheri and Cymbopogon jwarancusa 1. Germination Response
Ecology of Chrysopogon aucheri and Cymbopogon jwarancusa 1. Germination Response
Mohammad Saleem and C. A. Call
ABSTRACT
The ability of Cymbopogon jwarancusa
(Jones) Schult, to displace Chrysopogon aucheri
(Boiss.) Stapf. on Baluchistan grasslands may be
related to differences in recruitment potential in
addition to differences in payability and grazing
tolerance. A controlled environment study was
designed to investigate the effects of different
temperature regimes on germination responses of
these two dominant range grasses. Cumulative
germination and rate of germination (mean
germination time) were evaluated at six alternating
temperature regimes (5/10. 5/15. 5/20, 10/20.
10/25 and 10/30°C. 12 h night/12 h day)
representing possible temperatures in western
Baluchistan during the recruitment period (March-
May). In addition to having greater seed fill and
viability. Cymbopogon jwarancusa had greater and
more rapid germination than Chrysopogon aucheri
at a wider range of temperatures, especially cooler
temperatures. These germination responses indicate
that Cymbopogon jwarancusa is superior to
Chrysopogon aucheri during the initial stage of the
recruitment process.
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March 1993
Vol. 43, Iss. 1
