Growth, n-uptake and yield attributes of sunflower plants grown on an aridisols in response to n-fertilizer
Автор: Kurdali F., Attar J.
Журнал: Журнал стресс-физиологии и биохимии @jspb
Статья в выпуске: 1 т.21, 2025 года.
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A field experiment was conducted to study the impact of different nitrogen fertilizer rates (0, 50, 100 and 150 kg N/ha as urea) on dry matter yield, nitrogen uptake (N), seed yield, seed oil content and properties of sunflower using the 15N labeling technique. Sunflower plants responded to increasing N supply with respect to growth performance. Dry matter yield (DM) and total N uptake were significantly increased with increasing N-supply. Regardless of N-fertilizer rates, partitioning of N yield in different plant parts showed that capitulum was the principle sink of N (60%) followed by leaves (30%) and stem (10%). Seed yield was significantly increased at higher N-supply. However, seed oil content was reduced in the N-fertilized treatments. Decreasing of seed oil content due to N addition was overcompensated by the seed yield increase. Consequently, oil yield was almost the same amongst all treatments. No clear trend of the effect of N supply on oil quality parameters was observed. Nitrogen derived from fertilizer (Ndff) was significantly increased with increasing N-supply. Regardless of N fertilizer rate, mean value of the %15NUE was 64%. This efficiency was less pronounced in stem and leaves than that in capitulum which had a greater value (69%) at higher N-supply.
Sunflower, n-fertilizer, oil, 15n
Короткий адрес: https://sciup.org/143183785
IDR: 143183785
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