Abstract
The uses of humic substances and organic residues for soil mulching have been more common during last years. This way, an experiment was carried out to evaluate the fruit quality and yield of guava cv. Paluma as a function of humic substances and organic soil mulching in Brazil. The experiment was performed from January 2012 to June 2013 (first trial) and from July to November 2013 (second trial) using a randomized blocks with treatments distributed in a factorial arrangement (5 × 2 × 2) of five humic substances doses (0, 10, 20, 30 and 40 mL of Humitec plant-1), two organic mulching use (with and without organic mulching) and two consecutive harvests, with four replications of two plants each. Humic substances enhance fruit production more efficiently in guava plants grown without soil mulching. Guava fruit production increases from the first to the second harvest. Fruit quality for titratable acidity, soluble solids, vitamin C and soluble solids/titratable acidity ratio is adequate independently of soil mulching use. Humic substances improve fruit quality of guava cv. Paluma. Under soil and climate conditions, and considering the first two production cycles of guava, it is possible to recommend about 20 mL L-1 of humic substances for production of high quality guava fruits. Key words: Humic acids, post-harvest, Psidium guajava.
Highlights
Fruit production is an important horticultural activity that increases employment availability, makes possible the family establishment in the field, promotes a better income distribution within productive cycle besides it acts as promising expectations of Brazilian and foreign markets
The experiment was performed from January 2012 to June 2013 and from July to November 2013 using a randomized blocks with treatments distributed in a factorial arrangement (5 × 2 × 2) of five humic substances doses (0, 10, 20, 30 and 40 mL of Humitec plant-1), two organic mulching use and two consecutive harvests, with four replications of two plants each
Humic substances enhance fruit production more efficiently in guava plants grown without soil mulching
Summary
Fruit production is an important horticultural activity that increases employment availability, makes possible the family establishment in the field, promotes a better income distribution within productive cycle besides it acts as promising expectations of Brazilian and foreign markets. Among the economically important fruit crops, guava (Psidium guajava L.) presents high viability for farmers, especially for expansion of production areas in da Rocha et al. Brazil (Amorim et al, 2015a). The increasing consumption of fresh and processed fruits, including guava, is a worldwide tendency that stimulates the production of quality fruits (Amorim et al, 2015b). Guava detaches among other tropical fruits for its attractive features of fruits such as color, pleasant smell and taste, mineral composition, high lycopene content and possibilities of consumption, attributes that guarantee preference for different consumer markets worldwide, especially because guava fruit has been consumed as fresh or processed fruit (Ramos et al, 2010; Amorim et al, 2015a)
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