Nitrogen (N) uptake and utilization efficiency (NUtE) of the high-yielding cultivars ‘Gemini’ of wheat and ‘Jaidor’of barley were tested with N rates of 0, 140 and 210 kg ha−1 and 0, 80 and 140 kg ha−1, respectively. The differentgrain yield response was linked to their difference in nitrogen uptake and utilization efficiency. The highest yield inbarley was recorded with 80 kg N ha−1 and in wheat with 210 kg N ha−1. Nitrogen application affected theaccumulation of biomass up to heading in wheat and barley. While N uptake during grain filling did not show anycorrelation to N applied in barley, it was markedly correlated in wheat. At N0 and N140 N applied, barley exhibiteda 32 and 8% higher NUtE than wheat. N agronomic efficiency, a parameter representing the ability of the plant toincrease yield in response to N applied, was similar in barley and wheat (8.7 and 9.2 kg kg−1 of N applied,respectively), suggesting that both species respond equally to nitrogen fertilization. Nevertheless, due to its lowerNUtE, wheat requires high N fertilization to optimize yields; by contrast, in barley the lower N rate needed to achievehighest yields enables this crop to perform better in low-input conditions. As a results, the reduced N requirementsfor barley highest yield associated with a better RF value (apparent N fertilizer recovery of 63% in barley and 49% inwheat at N140) makes barley crop a better choice to reduce ground-water pollution due to nitrate leaching in winterand early spring.
Uptake and agronomic efficiency of nitrogen in winter barley and winter wheat / Delogu, G.; L., Cattivelli; Pecchioni, Nicola; D., DE FALCIS; T., Maggiore; A. M., Stanca. - In: EUROPEAN JOURNAL OF AGRONOMY. - ISSN 1161-0301. - STAMPA. - 9(1998), pp. 11-20.
Data di pubblicazione: | 1998 |
Titolo: | Uptake and agronomic efficiency of nitrogen in winter barley and winter wheat. |
Autore/i: | Delogu, G.; L., Cattivelli; Pecchioni, Nicola; D., DE FALCIS; T., Maggiore; A. M., Stanca |
Autore/i UNIMORE: | |
Rivista: | |
Volume: | 9 |
Pagina iniziale: | 11 |
Pagina finale: | 20 |
Codice identificativo ISI: | WOS:000075127700002 |
Codice identificativo Scopus: | 2-s2.0-0032102587 |
Citazione: | Uptake and agronomic efficiency of nitrogen in winter barley and winter wheat / Delogu, G.; L., Cattivelli; Pecchioni, Nicola; D., DE FALCIS; T., Maggiore; A. M., Stanca. - In: EUROPEAN JOURNAL OF AGRONOMY. - ISSN 1161-0301. - STAMPA. - 9(1998), pp. 11-20. |
Tipologia | Articolo su rivista |
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