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Nutrient transport between ryegrass plants differeing in nutrient status
Authors:K Ritz  E I Newman
Institution:(1) Department of Botany, University of Bristol, BS8 1UG Bristol, UK;(2) Present address: Macaulay Institute for Soil Research, Craigiebuckler, AB9 2QJ Aberdeen, UK
Abstract:Summary It is known that nitrogen and phosphorus can be transferred from one living plant to another, but it is not known whether the amounts transferred are large enough to influence the growth of the species in the field. Two Lolium perenne plants were grown per pot of unfertilized soil. During 25 weeks one plant (the lsquodonorrsquo) in each pot was fed nutrients through leaves; donors in control pots received only water. The lsquoreceiverrsquo plants which shared a pot with the nutrient-fed donors increased significantly, compared with the controls, in leaf number and concentration of phosphorus, though not in concentration of nitrogen, potassium, calcium or magnesium. The rate of phosphorus transfer agreed well with previous results using 32P. The results are compared with rates of phosphorus uptake in the field. It is concluded that nutrient transfer could have an influence on the balance between coexisting species in the field, but probably the influence will be small.
Keywords:Lolium  Nitrogen  Nutrient transfer  Phosphorus
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