Annual dicotyledonous plants in repeated sowings and monoculture of winter wheat in Kurzeme and Zemgale regions from 1997 till 2011 | Īsmūža divdīgļlapju nezāles atkārtotos un bezmaiņas ziemas kviešu sējumos Kurzemē un Zemgalē no 1997. līdz 2011. gadam
2014
Lapins, D., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Berzins, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Putniece, G., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Korolova, J., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Information Technologies | Timofejeva, I., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Sanzarevska, R., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Sprincina, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture
The analysis of the influence of crop rotation on weed incidence in winter wheat was based on sowings’ monitoring during 1997 – 2011 in Kurzeme and Zemgale regions of Latvia. The Institute of Soil and Plant Sciences of the Latvia University of Agriculture studied the dynamics of annual and biennial weed level in the fixed annually observed areas. The type of crop rotation was selected by a land holder. The weed infestation of sowings was determined using the quantitative occurrence method developed by A. Rasinsh. The support of this method is the correlation between the incidence of weed species in the field and the number of weed species per square meter of the field area. The difference between the annual and biennial weed incidence was studied in four types of crop rotation during fourteen years. Repeated sowing and monoculture of winter wheat growing were not the only factors determining the increase of weed infestation. The following dominant weed species were determined: Viola arvensis, Polygonum spp., Galium aparine, Veronica arvensis.
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