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Nitrogen nutrition, yield and quality of spinach
Author(s) -
Elia A,
Santamaria P,
Serio F
Publication year - 1998
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/(sici)1097-0010(199803)76:3<341::aid-jsfa938>3.0.co;2-4
Subject(s) - spinach , oxalate , yield (engineering) , nitrogen , nitrate , chemistry , ammonium , petiole (insect anatomy) , agronomy , zoology , horticulture , botany , biology , biochemistry , inorganic chemistry , hymenoptera , materials science , organic chemistry , metallurgy
When grown in solution culture spinach plants confirmed the preference toward NO 3 − nutrition and showed heavy toxicity to NH 4 + . 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). © 1998 SCI.