Changes in soil weed seed bank according to spring barley maturity stages
Department of Soil Management, Lithuanian University of Agriculture, Studentu g. 11, LT–53067 Akademija, Kaunas r. Lithuania; e-mail: email@example.com
Soil weed “seed bank” was studied according to harvesting time at different stages of spring barley maturity at the Research Station of the Lithuanian University of Agriculture, during the period of 1997–1999. The aim of the experiment was to identify weed seed species in the soil “seed bank” and changes in the total amount of the soil “seed bank”, harvesting spring barley at different stages of maturity. In two years of the three, earlier harvesting of spring barley at the milky stage of maturity essentially decreased reserves of the soil “seed bank”. The soil “seed bank” was established by counting 179–344 million ha–1 seeds at the stem elongation–milky stage of spring barley maturity and 230–304 million ha–1 seeds after harvesting spring barley at the hard stage of maturity. During the experiment, 20 weed seeds species belonging to 11 plant families: Amaranthaceae, Asteraceae, Boraginaceae, Chenopodiaceae, Convolvulaceae, Cruciferae, Euphorbiaceae, Lamiaceae, Polygonaceae, Scrophulariaceae, Violaceae, were identified in the soil “seed bank”. During the three years of the experiment, seeds of the white goosefoot Chenopodium album L. and the common chickweedStellaria media (L.) Vill. dominated.