Premium
EFFECTS OF NUTRIENT TREATMENTS ON STEM‐BREAK OF FLAX (CAUSED BY POLYSPORA LINI LAFF.)
Author(s) -
COLHOUN JOHN
Publication year - 1957
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1957.tb00466.x
Subject(s) - potassium , phosphorus , biology , nutrient , inoculation , seedling , nitrogen , fertilizer , agronomy , horticulture , zoology , chemistry , ecology , organic chemistry
Flax was grown in prepared composts containing different levels and ratios of nitrogen, phosphorus and potassium. When the cotyledons were inoculated with Polyspora lini Laff. the incidence of the seedling phase of the disease was not influenced by nutrient treatments, all plants being attacked. In such inoculated plants the lowest incidence of the stem‐break phase of the disease occurred in composts deficient in phosphorus. Increasing doses of the phosphatic fertilizer were associated with increases in susceptibility to stem‐break as well as in plant height and fibre yield. Small additions of the fertilizer produced little effect. In one experiment the incidence of stem‐break was directly and very significantly correlated with the percentage of phosphorus in the plants when nitrogen and potassium were held constant. Significant correlations were not found to exist between the incidence of stem‐break and the percentage of nitrogen or potassium in plants when the other two appropritate variables were held constant.