Kartulipealsete N, P ja K sisaldus 85. kasvupäeval ning nende seos mugulate kuivainesaagiga 100. kasvupäeval mahe- ja tavaviljeluses
Laen...
Kuupäev
2026
Kättesaadavus
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool; Maaelu Teadmuskeskus
Abstrakt
This study examined whether potato haulm nutrient uptake near the end of the growing
period is associated with tuber dry-matter yield and whether these relationships differ
between organic and conventional management. Data were obtained from the long-term
farming systems experiment at Eerika, Estonia for the periood of 2013–2016. Haulm
was sampled on day 85, and total N, P and K uptake (kg ha–1) was calculated from nutrient
concentrations and haulm dry mass. Tuber dry matter yield (t ha–1) was determined
on day 100. Associations were evaluated using linear regression and Pearson correlation
separately for organic (n = 48) and conventional (n = 64) systems. For N, the association
with tuber dry-matter yield was statistically significant but weak in the conventional
system (R = 0.27; p < 0.001) and not significant in the organic system (R = 0.19; p =
0.20). The strongest association was observed for phosphorus (conventional R = 0.78,
p < 0.001; organic R = 0.31, p < 0.05). For potassium, the association was strong in the
conventional system (R = 0.68; p < 0.001), but not significant in the organic system (R
= 0.23; p = 0.114). Overall, late-season haulm nutrient uptake – particularly phosphorus
– was associated with tuber dry matter yield, with stronger and more consistent associations
in the conventional system.
Kirjeldus
Märksõnad
potato, farming system, nutrient uptake, haulm, tuber dry matter, crop production, articles
Viide
Eremeev, V., Margus, K., Kuht, J., Loit-Harro, E., Luik, A., & Talgre, L. (2026). Kartulipealsete N, P ja K sisaldus 85. kasvupäeval ning nende seos mugulate kuivainesaagiga 100. kasvupäeval mahe- ja tavaviljeluses. Eesti Maaülikool; Maaelu Teadmuskeskus. https://doi.org/10.15159/AGR.26.06