NUTRITION OF THE STRAWBERRY (Fragaria spp.) WITH SPECIAL REFERENCE TO FOLIAR ABSORPTION OF RADIOPHOSPHORUS AND CALCIUM

摘要

The absorption and subsequent utilization of radio-phosphorus (P32) and calcium (Ca45) by the leaves and roots of the strawberry (Fragaria spp. var. Robinson) was studied. Horticulturally, the strawberry was selected because of growth habits well adapted to nutritional studies. Visual and quantitative evidence of the efficiency of uptake of P32 and Ca45 under various environmental conditions was obtained by means of autoradiography and isotope dilution analysis. Data are presented for the growth and fruiting response of the strawberry to foliar sprays of nitrogen and phosphorus in the greenhouse and under field conditions.