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Influence of soil moisture on the competitive ability and seed dormancy of Sinapis arvensis in spring wheat
Author(s) -
Wright K J,
Seavers G P,
Peters N C B,
Marshall M A
Publication year - 1999
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1046/j.1365-3180.1999.00147.x
Subject(s) - agronomy , mentha arvensis , cultivar , moisture stress , water content , competition (biology) , biology , habit , moisture , horticulture , chemistry , botany , psychotherapist , engineering , psychology , ecology , geotechnical engineering , organic chemistry , essential oil
Two experiments were carried out, one in 1995 and one in 1997, to investigate the competitive abilities of two spring wheat cultivars with Sinapis arvensis L. The spring wheat cultivars (Baldus and Canon) of contrasting growth habit were grown with and without S. arvensis under two different moisture regimes (10% and 70% of field capacity). In 1995, S. arvensis was found to be less competitive when subjected to moisture stress, resulting in smaller wheat yield losses in dry soil than in moist soil. In both years, seed production of S. arvensis was reduced by competition and moisture stress, and the seeds produced by plants that had been grown in drier soil were small and had negligible dormancy. Hence, in dry conditions, the competitiveness of S. arvensis and its potential to produce persistent seed may be reduced. Some differences between the two wheat cultivars were evident: cv. Baldus was more competitive against S. arvensis than cv. Canon. This could be attributed to differences in canopy structure.