Umbrohtude biomassi, arvukuse ja mitmekesisuse muutused pikaajalise külvikorra katse teises rotatsioonis
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Kuupäev
2023
Kättesaadav alates
Autorid
Madsen, Helena
Luik, Anne
Eremeev, Viacheslav
Mäeorg, Erkki
Talgre, Liina
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian Academic Agricultural Society
Abstrakt
The effects of long term (established in 2008) five-field
crop rotation (barley (Hordeum vulgare L.) with undersown red clover
(Trifoium pratense L.), red clover, winter wheat (Triticum aestivum L.),
pea (Pisum sativum L.), potato (Solanum tuberosum L.)) on the biomass,
abundance and diversity (Shannon-Wiener index) of weeds in three
organic (Org) and two conventional (Conv) systems after the second
rotation were investigated. The results include data from the second
rotation in 2013 – 2017. The control system (Org 0) followed only the crop
rotation. In the organic systems Org I and Org II winter cover crops were
used. In Org II system composted cattle manure was also applied. The
conventional cropping systems were treated with herbicides and
fungicides and system Conv 0 acted as control (no fertilizer use). Mineral
fertilizer was used in Conv II. In general, the significant differences were
evident between conventional and organic cropping systems. There were
also some differences depending on the crop. The weed biomass was the
lowest in barley and potato plots, with significantly higher values in
organic than in conventional systems. In clover plots the highest biomass
of weeds occurred in Conv II whilst the lowest in Org I. In winter wheat
plots the biomass of weeds was significantly lower in conventional
systems than in any of the organic systems. Pea plots had the highest
biomass, abundance and diversity of weeds in all systems within all
rotational crops. Slight tendencies showed the decrease of weed
abundance and diversity at the end of the rotation in systems with cover
crops (Org I and Org II). This could be explained by better growing
conditions due to higher microbial activity and organic carbon content in
the soil of organic systems.
Kirjeldus
Saabunud / Received 27.01.2023 ; Aktsepteeritud / Accepted 24.06.2023 ; Avaldatud veebis / Published online 15.08.2023 ; Vastutav autor / Corresponding author Helena Madsen ; helena.madsen@emu.ee
Märksõnad
Shannon-Wiener diversity index, winter cover crops, organic farming, weed control, crop rotation, articles