Abstract
The effects of substrates formulated with different proportions of decomposed buriti stem (Mauritia flexuosa) and the application of nitrogen fertilizer rates in the production of cagaita (Eugenia dysenterica DC.) seedlings were investigated in this study. The treatments were arranged in a completely randomized design, in a 3 × 5 factorial: three substrates formulated from different proportions of decomposed buriti stem (0, 25 and 50%) with a clay loam soil (Oxisol), and five N fertilizer rates (0; 100; 200; 300 and 400 mg dm-3), with four replicates. At 60 days after emergence, the plant height, stem diameter, leaf area, root length, dry matter accumulation of shoots, roots, and total, shoot:root dry matter ratio (SRR), height:diameter ratio (HDR), and Dickson quality index (DQI) were measured. The substrate containing soil and decomposed buriti stem in the proportion of 3:1 (v:v), in association with the application of N rates from 167 to 190 mg dm-3 is recommended for the production of cagaita seedlings, resulting in positive effects on plant growth and development as reported by higher PH, SRR, and HDR. The application of 154 mg dm-3 of N resulted in higher DQI of the cagaita seedlings.
Highlights
The Cerrado is the second largest biome in Brazil, occupying an area of 204.7 million hectares of Central Brazil and has the highest species biodiversity among all the tropical savannah regions of the world (Sano et al, 2008)
The substrate containing soil and decomposed buriti stem in the proportion of 3:1 (v:v), in association with the application of N rates from 167 to 190 mg dm-3 is recommended for the production of cagaita seedlings, resulting in positive effects on plant growth and development as reported by higher Plant height (PH), shoot:root dry matter ratio (SRR), and height:diameter ratio (HDR)
Analysis of variance reported that the effect of substrates formulated with soil and decomposed buriti stem (DBS) was significant on plant height, stem diameter, root dry matter, and shoot:root dry matter ratio, while the effect of nitrogen application rates was significant on leaf area, shoot dry matter, root length, root dry matter, and Dickson quality index
Summary
The Cerrado is the second largest biome in Brazil, occupying an area of 204.7 million hectares of Central Brazil and has the highest species biodiversity among all the tropical savannah regions of the world (Sano et al, 2008). In this region, more than twelve thousand plant species were recorded, and approximately eleven thousand are vascular plants (Mendonca et al, 2008). Cagaita has been widely used by the regional population and is one of the native fruits that has jas.ccsenet.org
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