Effect of nitrogen form and rate on elemental content and growth of pyracantha,cotoneaster and weigela

The effects of N form and rate on elemental content in Cotoneaster dammeri, C.K. Scheid. ‘Royal Beauty‘, Pyracantha coccinea Roem. ‘Wyatti’ and Weigela florida Bunge were studied. Total N concentration was dependent on the N form applied, with greater N concentrations occurring when NH₄N was employed. In both experiments, Mn-deficiency symptoms were apparent on plants treated with NO₃N, and Mn tissue concentrations were suppressed with these treatments. Potassium, Ca and Mg concentrations were highest when plants were treated with NO₃N. Iron and P concentrations were unaffected by N form, regardless of taxa.