Effect of nitrogen fertilizer and nodulation on lime-induced chlorosis in soybeans

Conference · Thu Jan 01 04:00:00 EST 1981

OSTI ID:5174814

Wallace, A.

Previous studies have indicated that addition of nitrogen to Fe-inefficient PI54619-5-1 soybeans, when grown in calcareous Hacienda loam soil, intensified iron chlorosis. It was reasoned that when large amounts of nitrate were taken up, more hydroxyl ions were expelled by roots with resultant less availability of soil Fe. It was further reasoned that if N were fixed symbiotically, cation (K, Ca, Mg) uptake would considerably exceed anion (H/sub 2/PO/sup -//sub 4/, Cl/sup -/) uptake with no need for uptake of NO/sub 3//sup -/ with resultant increase in protons excreted. Iron availability then would be increased and there would be less Fe deficiency. An experiment was conducted with and without innoculation with the PI54619-5-1 soybeans in the calcareous soil to test the ability of nodules to prevent Fe chlorosis. The only plants in the experiment with nodules were those with innoculum added and these plants were most free of Fe chlorosis. Iron analyses indicated that the hypothesis may be correct. It can be concluded that cation-anion uptake balance has much to do with the onset of lime-induced chlorosis. The relative uptake of NH/sub 4//sup +/ and NO/sub 3//sup -/ species of nitrogen can be important considerations in the cation-anion balance.

• Research Organization: California Univ., Los Angeles (USA). Lab. of Biomedical and Environmental Sciences
• DOE Contract Number: AC03-76SF00012
• OSTI ID: 5174814
• Report Number(s): UCLA-12/1341; CONF-8108109-1; ON: DE82005444
• Country of Publication: United States
• Language: English

Related Subjects

550200 -- Biochemistry
553000* -- Agriculture & Food Technology
59 BASIC BIOLOGICAL SCIENCES
60 APPLIED LIFE SCIENCES
ANIONS
BIOLOGICAL EFFECTS
CATIONS
CHARGED PARTICLES
ELEMENTS
FERTILIZERS
GLYCINE HISPIDA
IONS
IRON
LEGUMINOSAE
METALS
NITROGEN
NITROGEN FIXATION
NONMETALS
NUTRITIONAL DEFICIENCY
PH VALUE
PLANT DISEASES
PLANTS
SOILS
TRANSITION ELEMENTS