Vanaga I
Latvian Plant Protection Research Centre, Struktoru iela 14a, LV-1039 Riga, Latvia.
Commun Agric Appl Biol Sci. 2012;77(3):369-77.
Dicot weed populations were assessed in spring barley trials carried out in four three-years periods at 5-year intervals: 1990-1992, 1995-1997; 2001-2003 and 2006-2008. The overall aim of this research was to evaluate the changes in dicot-weed infestations in spring barley in fields of one region (Riga) of Latvia in sod-podzolic loamy sand soil. The results of the trials showed that Galeopsis spp, Stellaoria media, Viola orvensis and Chenopodium album were among the most frequent weed species in the periods of 1990-1992 and 1995-1997. The occurrence of C. album and V. arvensis increased during the periods of 2001-2003 and 2006-2008.
在1990 - 1992年、1995 - 1997年、2001 - 2003年和2006 - 2008年这四个为期三年的时间段里，每隔五年在五年生的间隔期对春大麦试验中的双子叶杂草种群进行评估。这项研究的总体目标是评估拉脱维亚一个地区（里加）的灰化壤质砂土上春大麦田双子叶杂草侵害情况的变化。试验结果表明，1990 - 1992年和1995 - 1997年期间，鼬瓣花属植物、小繁缕、田野堇菜和藜是最常见的杂草种类。在2001 - 2003年和2006 - 2008年期间，藜和田野堇菜的出现频率有所增加。
