Commercial characteristics of coffee seedlings produced with different sources of phosphorus and plant growth-promoting bacteria

Abstract

Considered the economic engine of many countries, the coffee culture represents an important component of the agricultural chain in Brazil. The growing values of commercialization, planting areas, and crop productivity require the acquisition of quality seedlings, which must receive adequate nutritional support through efficient fertilizers. Slow and controlled-release fertilizers, such as organominerals, gain prominence when it comes to increasing efficiency in the use of phosphorus, as well as plant growth-promoting bacteria (PGPB) with phosphate solubilizing characteristics. This study aimed to evaluate the effect of different sources of mineral and organomineral fertilizers, inoculated and non-inoculated with PGPB on the quality parameters of coffee seedlings. In general, the P sources used in the experiment positively interfered with the development of coffee seedlings. This proves that there is a need for nutritional supplementation for the good development of the seedlings. Among the sources used, the organomineral in granulated form showed better performance in coffee seedlings' growth and physiological parameters, proving to be a viable alternative to commonly used fertilizers. The addition of PGPB showed a significant advantage for seedling quality variables.

Efficiency of organomineral fertilizer and doses of Azospirillum brasilense on the morphophysiological quality of Mezilaurus itauba seedlings

“…The same is true for the use of technological packages, for instance, the use of microorganisms such as atmospheric nitrogen-fixing bacteria, which involves the incorporation of atmospheric N 2 (Ferraro et al, 2023), which is then fixed by bacteria and allows nutrients in the form of ammonium (NH 4 + ) and nitrate (NO 3 -) to be released and become available to the root system of plants according to their nutritional need, resulting in balanced growth (Bashan 1999;Souza et al, 2023). Souza et al (2023), in a study with production of Cordia alliodora seedlings, observed that the use of Azospirillum brasilense with foliar and soil application promoted increments in biomass production and in the photosynthetic parameters of the leaves, including chlorophyll content, stomatal conductance and leaf area.…”