Abstract:
:The effects of fertilization on leaf longevity and leaf mortality in the Alaskan evergreen shrub, Ledum palustre (Ait.) Hult., were investigated in a field experiment. The fertilization treatments included N alone, P alone, N plus P, and N plus P plus K. After 5 years all treatments had the same effect on leaf longevity, decreasing life expectancy from about 2 years in controls to 1-1.5 years in the fertilized plants. In the NPK-fertilized plants, most of the decrease in leaf longevity was due to increased winter leaf mortality; fertilization actually decreased leaf losses during the growing season. The results are consistent with previous research suggesting that one function of overwintering evergreen leaves is to serve as nutrient storage organs, a function that is superfluous when nutrient supplies for new growth can be obtained from current uptake.
journal_name
Oecologiajournal_title
Oecologiaauthors
Shaver GRdoi
10.1007/BF00379686subject
Has Abstractpub_date
1983-02-01 00:00:00pages
160-165issue
2-3eissn
0029-8549issn
1432-1939pii
10.1007/BF00379686journal_volume
56pub_type
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