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Minimum Concentrations of Manganese Necessary for Injury to Various Legumes in Culture Solutions 1
Author(s) -
Morris H. D.,
Pierre W. H.
Publication year - 1949
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/agronj1949.00021962004100030003x
Subject(s) - agricultural experiment station , citation , library science , state (computer science) , operations research , agriculture , mathematics , history , computer science , archaeology , algorithm
ESULTS from preliminary greenhouse investigaR tions on growth of legumes in acid soils indicated that manganese toxicity might be the primary cause of poor growth of legumes under certain acid soil conditions. This theory was supported by the definite t,oxicity symptoms of the plant foliage, high manganese content of the plant material, and the relatively high watersoluble manganese concentration in the soil. Subsequent studies on the manganese content of certain acid soils showed that they sometimes contain as high as 50 ppm manganese in the displaced soil solution (8).3 Little is known regarding the actual concentration of manganese required for toxicity to plants, especially legumes. Kelley (6) reported that legumes differed greatly in their ability to grow on the high manganese soils of Hawaii, but other factors such as aluminum toxicity or phosphorus deficiency may have been responsible, a t least in part, for the differential growth. No data were given as to the water-soluble manganese content of the soils. Oken (12) compared the tolerance of several plant species to manganese in culture solutions and found that some species, viz., Lemna polyrrhiza and Seizecio d v a ticus, were injured by concentrations of manganese as low as 0.5 ppm, while corn was injured only when the manganese concentration was raised to 62.5 ppm. Unfortunately, no legumes were included in his study. Brenchley (2 ) found that peis were more sensitive to manganese than barley; the growth of both species was retarded when approximately 3.5 pprn manganese were added to the nutrient solutions. Several investigators (5, 7 , IO, 14) hamreported that plant tolerance to soluble manganese was affected by the concentration of other nutrient elements in the culture solutions. Therefore, comparisons of the results o€ various investigators as to the relative tolerance of legumes to manganese toxicity would be misleading if the concentration of certain other elements in the culture solution or soils are different. The objectives of this investigation were (a) to determine if concentrations of water-soluble manganese approximating those found in certain acid soils are injurious to the growth of legumes in culture solutions,