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- Author or Editor: G. D. Coorts x
Six levels of Mn were applied in nutrient solution to ‘Ace’ and ‘Nellie White’ Easter lilies (Lilium longiflorum Thunb.) grown to anthesis. ‘Nellie White’ Mn tissue content was higher than ‘Ace’. Foliar symptoms of Mn toxicity did not appear at or below solution applications of 50 ppm Mn. High levels of Mn resulted in shorter plants, lower plant dry weight, leaf chlorosis and chlorotic mottling, and some leaf curling.
Intermittent mist is widely used by plant propagators in the rooting of cuttings. However, it has been demonstrated that under this method of propagation nutrients are leached from cuttings. Recent work (1, 2, 3) has shown that by adding fertilizer to mist during the propagation of cuttings, the nutrient content of the cuttings may be replenished. Due to the length of time in the propagation bench, sanitation is much more critical when propagating woody ornamental plants under a nutrient mist than when propagating herbaceous plants.
Respiration is of primary importance to the plant since it liberates energy to do chemical work in synthesizing energy-rich materials involved in growth. Although the respiratory rate of many plant tissues and organs have been studied (1), no data on respiratory rate of blueberry leaves was found in a search of the literature. It is felt that data on the respiratory rate of highbush blueberry (Vaccinium corymbosum L.) would be of value since it will provide basic information for comparison with other genera.
Four levels of K were applied at weekly intervals to 2 plantings of Matthiola incana (L.) R. Br. grown to anthesis in 3 media. At all levels of K the plants grown in the bark medium had the greatest height, spike length, oven dry weight, and shortest time to anthesis. The optimum tested level was 100 ppm K for plants grown in both the soil mix medium and the peat-lite medium. Differences in plant performance were associated more with media than with levels of K.