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Growth and mineral nutrition of mahogany (Swietenia macrophylla) seedlings subjected to lime in Yellow Alic Latosol

2017; Southern Cross Publishing; Volume: 11; Issue: 10 Linguagem: Inglês

10.21475/ajcs.17.11.10.pne599

1835-2693

George Rodrigues da Silva, Ismael de Jesus Matos Viégas, Mário Lopes da Silva Júnior, Marcos André Piedade Gama, Ricardo Shigueru Okumura, D. A. C. Frazão, Gilson Sérgio Bastos de Matos, João Cardoso de Souza Júnior, Eduardo do Valle Lima, Jessivaldo Rodrigues Galvão,

Plant Micronutrient Interactions and Effects

The management practices of soil fertility, such as use of lime on mahogany (Swietenia macrophylla King.) nutrition contribute to the crop yield especially in acidic soils.The main aim of this study was to evaluate the application of lime in early growth and nutrient uptake in mahogany seedlings.The treatments were limestone rates (0, 1.9, 3.2, and 4.6 t ha -1 ) necessary to increase the base saturation of substrate (currently 12.4%) for 20, 40, 60 and 80%, respectively, with five replications arranged in a randomized design.The variables evaluated were: plant height, stem diameter, root dry matter, shoot dry matter and total dry matter and N, P, K, Ca, and Mg concentration in shoots.Through this, accumulation of nutrients was estimated.Different lime rates positively influenced the vegetative growth of mahogany seedling.The maximum technical efficiencies for stem diameter of 1.40 cm; root dry matter of 28.61 g plant -1 ; shoot dry matter of 80.25 g plant -1 ; total dry matter of 107.16 g plant -1 ; and shoot/root ratio of 2.92 were achieved at rates of 3.33; 4.54; 4.56; 4.58; and 3.82 t ha -1 , respectively.Regarding the nutrient concentrations in aerial part of plant, we observed that N (23.14 g kg -1 ); P (4.43 g kg -1 ); K (13.04 g kg -1 ); Ca (4.25 g kg -1 ); and Mg (3.37 g kg -1 ) concentration were obtained at rates of 2.88; 3.20; 3.31; 3.64; and 2.93 t ha -1 , respectively.Some nutritional requirements were observed in mahogany culture in soil with acidity correction.The nutrient accumulation values were observed according to following descending order: N>Ca>K>Mg>P.In general, for initial development of mahogany we observed that best results, either biometric as a nutritional, were obtained at rates between 2.74 to 3.64 t ha -1 of lime application.