Work

Effects of Nitrogen Form and Level on Ion Concentrations, Water Stress, and Blossom-end Rot Incidence in Tomato1

Year: 1978

Type: article

Abstract: Ammonium nutrition, in comparison to NO 3 –N nutrition, of tomato in sand culture reduced shoot growth, total and mean fruit weight, fruit number, leaf xylem pressure potential, leaf CA, Mg, and NO 3 concentration, and normal fruit Ca, Mg, K, and NO 3 concentration. Leaf diffusive resistance, leaf NH 4 concentration, and blossom-end rot incidence were increased by NH 4 –N nutrition. Increasing substrate NO 3 level increased shoot growth, fruit number per plant, and fruit NO 3 concentration. Increasing substrate NH 4 level increased leaf diffusive resistance, and leaf xylem pressure potential, but had no effect on shoot growth. Under both N forms, increasing N level did not affect fruit yield or normal fruit Ca, K, or P concentration, but decreased leaf Ca, Mg, and P concentration, and increased normal fruit Mg. Blossom-end rot occurred only under NH 4 –N nutrition. Affected fruit had lower Ca, Mg, NO 3 , and NH 4 concentration and higher fruit K/Ca ratio. Fruit condition exerted no effect on fruit P or K concentration.

Source: Journal of the American Society for Horticultural Science

DOI: 10.21273/jashs.103.2.265

Authors: W. G. Pill, V. N. Lambeth, T. M. Hinckley

Institution: University of Missouri

Language: English

Topic: Plant Growth and Agriculture Techniques

Subfield: Soil Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: hybrid

Estimated APC paid: $3,500