Nutrient reabsorption efficiency and the response to phosphorus fertilization in the desert shrub <i>Larrea tridentata</i>

TitleNutrient reabsorption efficiency and the response to phosphorus fertilization in the desert shrub Larrea tridentata
Publication TypeJournal Article
Year of Publication1987
AuthorsLajtha K.
JournalBiogeochemistry
Volume4
Pagination265-276
Date Published1987
Call Number00164
Keywordsarticle, articles, ecosystem, fertilization, phosphorous amendments, journal, journals, Larrea,nutrient use, Larrea,phosphorous, nutrient reabsorption efficiency, nutrient use, phosphorous cycling
AbstractA field fertilization experiment demonstrated that growth of Larrea tridentata was not limited by phosphorus, even though soils contained high levels of pedogenic carbonates that can potentially fix high amounts of phosphorus. Nutrient reabsorption efficiencies in unfertilized shrubs ranges from 72-86% for P, making nutrient reabsorption a very effective nutrient conservation mechanism. Absolute amounts of N and P reabsorption increased with N and P concentrations in leaves, with reabsorption being greater during drought stress than during rapid leaf growth. However, only N reabsorption efficiency increased with increasing plant N status. A model was developed to explain patterns of nutrient reabsorption efficiencies over large gradients in nutrient availability.