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The Effects of Potassium on Ammonium Nutrition of Tomato ( Lycopersicon esculentum Mill.) 1
Author(s) -
Ajayi O.,
Maynard D. N.,
Barker A. V.
Publication year - 1970
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1970.00021962006200060043x
Subject(s) - lycopersicon , ammonium , potassium , mill , solanaceae , chemistry , greenhouse , agronomy , ammonia , horticulture , biology , biochemistry , organic chemistry , gene
Tomato plants ( Lycopersicon esculentum Mill.) grown in pot culture in the greenhouse were easily injured by continuous, prolonged application of (NH 4 ) 2 SO 4 . When an equivalent amount of K was supplied with the NH 4 , plant injury due to excessive NH 4 was prevented. The presence of K in the NH 4 culture system enhanced growth and restricted total N and NH 4 ‐N accumulation. The magnitude of the restriction of N constituents suggests that the ameliorating K effect was due in part to a K:NH 4 competition for uptake but principally to the enhancement of NH 4 assimilation.