The Germination of Polygonum Species in the Field and in the Glass-House
1960; Wiley; Volume: 48; Issue: 1 Linguagem: Inglês
10.2307/2257320
ISSN1365-2745
Autores Tópico(s)Allelopathy and phytotoxic interactions
ResumoThe development of a heavy infestation of Polygonum persioaria, P. avic'ilare and P. convolvuiluvs in an arable field on Rothamsted farm provided an opportunity to investigate the germination of seed of these species in field and glass-house. They are all spring-germinating annuals, and Justice (1941) found that their seeds were physiologically similar; all were dormant at maturity, after-ripened when chilled in a moist substrate and did so sooner when the pericarp was removed, and germinated well after normal winter conditions. Simmonds (1945) found that germination occurred in early April in 1943 and mid-May in 1944 at Coe Fen, Cambridge, but at Rothamsted in 1957 it was well under way by mid-March, probably because the monthly mean air temperature was more than 30 F above average in January and February and 6? F above average in March. The object of the present experiment was to compare three species of Polygonum in respect of their times of germination and the percentage of seeds present in the soil that germinated both in the field and in the glass-house.
Referência(s)