When grown in solution culture spinach plants confirmed the preference toward NO3/- nutrition and showed heavy toxicity to NH4/+. In open field condition the highest yield was achieved with the ammonium sulphate in Bari (autumn-winter cycle - 110 days) and with calcium nitrate in Policoro (winter-spring cycle - 64 days). By increasing N level, yield, nitrates and oxalates leaf content increased. Oxalate content was not affected by nitrogen form. Remarkable differences were observed between leaf petiole and blade in nitrate (4062 vs 925 mg kg-1 of fresh mass) and oxalate (1051 vs 6999 mg kg-1 of fresh mass).
Nitrogen nutrition, yield and quality of spinach
SANTAMARIA, Pietro;
1998-01-01
Abstract
When grown in solution culture spinach plants confirmed the preference toward NO3/- nutrition and showed heavy toxicity to NH4/+. In open field condition the highest yield was achieved with the ammonium sulphate in Bari (autumn-winter cycle - 110 days) and with calcium nitrate in Policoro (winter-spring cycle - 64 days). By increasing N level, yield, nitrates and oxalates leaf content increased. Oxalate content was not affected by nitrogen form. Remarkable differences were observed between leaf petiole and blade in nitrate (4062 vs 925 mg kg-1 of fresh mass) and oxalate (1051 vs 6999 mg kg-1 of fresh mass).File in questo prodotto:
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