MINERAL NUTRITION IN THE TREE Calophyllum brasiliense Cambess. (Calophyllaceae)1

Abstract

Riparian and gallery forests located at the “arc of deforestation” have been undergoing fast degradation. With the implementation of the new Brazilian Forest Code (Law 12,651 of 2012), these can be reduced further. Thus, new studies on seedling production for ecological restoration should be carried out using native species from the Amazon and Cerrado. The objective of the present study was to assess under which shading levels the seedlings of Calophyllum brasiliense, a tree species typical of humid environments, show the highest values of growth and nutrient use efficiency, aiming at using these seedlings for restoration. The study was carried out in a plant nursery of the State University of Mato Grosso in Nova Xavantina, Brazil. We assessed seedling growth in diameter, height, number of leaves, production of shoot and root dry mass, Dickson quality index (DQI), and efficiency in the internal use of nutrients (EIUN) in greenhouses at 0 (full sunlight), 30, 50, 70, and 90% shading. The treatments at 50 and 70% shading showed the best results. Ecologically, the species responds well under both gap conditions (50% shading) and canopy or closing gap conditions (70% shading). Our results showed that the ideal conditions to produce seedlings of this species with high EIUN are obtained in greenhouses with 70% shading.

Structural and histochemical attributes of secretory ducts and cavities in leaves of four species of Calophyllaceae J. Agardh in Amazonian savannas

“…They are known for the presence of ducts and resinous cavities that play an important role in defence of plants against herbivory, fungi and bacteria (Bittrich et al, 2015;Cabrita 2019). Also, these species are important from an economic point of view, as they have antiinflammatory, antioxidant, anti-tumour properties and are used in the treatment of skin diseases, such as pau-santo-rosa (K. rubriflora), pau-santo (K. coriacea), camac ßari (C. densifolia) and guanandi (C. brasiliense); these species are also planted for the recovery of disturbed areas and also offer good quality wood for civil construction (Souza & Lorenzi 2012;Melo et al, 2014;Morandi et al, 2017;Silva et al, 2020). The species conservation status has not yet been evaluated (CNC Flora 2021).…”

Nutritional evaluation of Guanandi seedlings fertilized with sewage sludge

“…The highest P leaf concentration was observed for SS (0.200 g·kg -1 more than SSC) at 90 days, and for SSC (0.400 g·kg -1 more than SS) at 180 days after planting, although the treatments did not differ statistically. The low concentration of P observed in the leaves of Calophyllum brasiliense has been indicated as high efficiency in the internal use of this nutrient, though plants required it in large amounts (Gliessman 2001;Morandi et al 2017). Santos et al (2008) observed that Guanandi specie had also a higher presence of organic phosphorus in the leaves, although they had reduced absorption capacity of P, since the slow growth imply less development of the root system and soil exploration, which resulted in lower absorption of P.…”

“…Ecologically, this specie has better answers in both clearing conditions (50% shading) and canopy (70% shading). The ideal conditions for seedling production and higher nutrient use efficiency (particularly for P) was obtained under 70% shading in the nursery conditions (Morandi et al 2017). It has potential for commercial use owing to the quality of its wood and latex, and it is also useful in the degraded areas recovery (Lorenzi 2008).…”