%0 Journal Article
%T Enhanced Efficiency Phosphorus Fertilizer Impact on Physiological Characteristics of Coffee Seedlings
%A Roberto dos Anjos Reis Jr.
%A Gustavo Pazzetti
%A Douglas Ramos Guelfi
%J Advances in Bioscience and Biotechnology
%P 492-504
%@ 2156-8502
%D 2023
%I Scientific Research Publishing
%R 10.4236/abb.2023.1412034
%X The effects of phosphorus (P) nutrition on various
aspects of photosynthetic metabolism have been examined for coffee plants (<i>Coffea arabica</i>) grown under greenhouse
conditions. The experimental design was completely randomized, and the
treatments were carried out in a 2 ¡Á 5 factorial scheme: two P sources [Triple
Superphosphate - TSP (46% P<sub>2</sub>O<sub>5</sub>) and Policote coated TSP -
TSP + Policote (43.7% P<sub>2</sub>O<sub>5</sub>)] and five P rates (0; 5; 10;
15 and 20 g P<sub>2</sub>O<sub>5</sub> plot<sup>-1</sup>), with three
replications. The net photosynthetic rate (A), the leaf temperature (LT), the
atmospheric CO<sub>2</sub> concentration (Ca), the stomatal conductance (gs),
the transpiration rate (E), the substomatal CO<sub>2</sub> concentration (Ci)
and carboxylation efficiency (Ce) were measured in the youngest fully expanded
leaf, with the use of an infrared gas analyzer. All photosynthesis measurements
were affected by P fertilization. P fertilization increased net photosynthetic
rate, leaf temperature, substomatal CO<sub>2</sub> concentration, stomatal
conductance, transpiration rate, and carboxylation efficiency. Policote coated
P fertilizer resulted in a higher net photosynthetic rate, leaf temperature,
stomatal conductance, and transpiration rate than conventional P fertilizer.
The data indicated that Policote coated P fertilizer, a kind of enhanced
efficiency P fertilizer (EEPF), alters the plant¡¯s photosynthetic carbon
metabolism, explaining higher crop development and yield resulted from this
EEPF.
%K Efficiency Use
%K Policote
%K Net Photosynthetic Rate
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=129727