RESPONSE OF ROSES TO LOW MOISTURE STRESS AT HIGH AND LOW LIGHT INTENSITIES
Subject:
Pennsylvania Flower Growers #262
Abstract:
The purposes of this research were to study the effect of three factors on the growth of Red American Beauty roses: 1) nitrate to ammonium ratios, 2) supplementary fluorescent lighting under conditions of low moisture stress, 3) additions of sphagnum moss peat to a soilless growing medium. Started eye2 XXX 'Red American Beauty' were planted May 24, 1971 in alternate benches of two connected greenhouses. All plants initially received two soft pinches and then no further pinching was done. Water and fertilizer were applied automatically daily at % gallon per square foot throughout the year. Nitrogen was applied at 100 ppm at each irrigation beginning June 9, raised to 125 ppm September 29, to 139 ppm November 9 and to 149 ppm February 25. The ammonium to nitrate nitrogen ratios varied as follows:
Keywords: Sphagnum moss Fluorescent lighting Soft pinches Low moisture stress Soilless growing medium
Libraries: Floriculture