Effects of autumn foliar application of15n‐urea on nitrogen storage and reuse in apple1
- 1 June 1989
- journal article
- research article
- Published by Taylor & Francis in Journal of Plant Nutrition
- Vol. 12 (6) , 675-685
- https://doi.org/10.1080/01904168909363983
Abstract
Effects of autumn foliar application of N‐urea on N storage and reuse in young apple seedling (Malus Pumila Mill.) were studied. Foliar application of urea‐15 N (3.5%) during autumn enhanced the retranslocation of leaf N to other plant parts and increased stored N. Foliar N sprays increased the proteolytic activities of the leaves; therefore, such activities appear to be a major mechanism of retranslocation of leaf N. Foliar applied N enabled the plant to produce more growth during the following seasons. A considerable portion of the plant total N during second and third years was attributable to the foliarly applied N during the first year.This publication has 8 references indexed in Scilit:
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