Vahekultuuride biomassi moodustamise ja lämmastiku sidumise võime ning mõju suviodra saagile
Laen...
Kuupäev
2023
Kättesaadav alates
Autorid
Toom, Merili
Talgre, Liina
Tamm, Sirje
Tamm, Ülle
Tamm, Ilmar
Narits, Lea
Talve, Tiina
Edesi, Liina
Lauringson, Enn
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian Academic Agricultural Society
Abstrakt
Cover crops play an important role in preventing nutrient
loss, reducing agricultural inputs, improving soil quality and
environmental sustainability. The objectives of the study were to
determine the biomass and nitrogen accumulation of cover crops and their
effect on the following spring barley (Hordeum vulgare L.). Field trials
with cover crop species winter rye (Secale cereale L), winter turnip rape
(Brassica rapa spp. oleifera L.), forage radish (Raphanus sativus L. var.
longipinnatus), hairy vetch (Vicia villosa Roth), and berseem clover
(Trifolium alexandrinum L.) were carried out during four growing seasons
(2016/17, 2017/18, 2018/19, and 2019/20) at the Estonian Crop Research
Institute (present: The Centre of Estonian Rural Research and Knowledge,
METK). Cover crop biomass and N accumulation in autumn and in spring
depended on species and growing conditions. The biomass and nitrogen
(N) accumulation were at their lowest in the first growing season
(2016/17) due to lowest level of effective temperatures. Forage radish
accumulated the highest amount of biomass and N in autumn. Berseem
clover accumulated lowest amount of biomass and N in the year with
drought conditions (2018) before sowing. Among overwintered cover
crops, hairy vetch accumulated the highest amount of N in the spring
although its biomass was similar to winter turnip rape. Winter rye had the
lowest biomass and N accumulation in spring. As an average over the four
years, only forage radish and hairy vetch significantly increased the yield
of subsequent barley. None of the cover crops had a negative effect on
barley, as the yield level following other species was similar to the control
without cover crop. The knowledge about cover crop selection is useful to
integrate suitable species into Estonian cropping systems.
Kirjeldus
Saabunud / Received 27.05.2023 ; Aktsepteeritud / Accepted 21.06.2023 ; Avaldatud veebis / Published online 15.08.2023 ; Vastutav autor / Corresponding author Merili Toom ; merili.toom@metk.agri.ee
Märksõnad
cover crops, biomass, nitrogen accumulation, crop yield, articles