Abstract
Radish yield and quality are factors influenced by water stress that may occur during periods of drought or irrigation handled inappropriately, interfering negatively in plants development, producing radishes of inferior quality and in lesser quantity. In addition to irrigation, which makes water available in the system, it is important to maintain it with the use of water-retaining products such as hydrogel. The aim of this work was to evaluate radish yield, submitted to three different hydrogel doses combined with two water slides. The experimental design was in factorial scheme 3 x 2, with three water slides (50%, 75% and 100% Eto – reference evapotranspiration estimate) and two hydrogel doses (40 and 60 g m-2) with four replicates. Number of leaves, horizontal and vertical root diameter (mm), total and shoot length (cm), fresh mass of root and shoot (g), dry mass of shoot and root (g) and yield (t ha-1) were evaluated. The best results, regarding radish production and development, were obtained when using 50% of Eto with 60 g m-2 of hydrogel in combination. Thus, radish cultivation in oxisoil was influenced by the use of hydrogel, which provided a more efficient water level use.
Highlights
The radish (Raphanus sativus L.) is a small-sized plant belonging to Brassicacea family, which in cultivars of greater acceptance, produces globular roots, of bright scarlet colour and white pulp (Filgueira, 2005)
In addition to small areas intended for radish production, yield and root quality are influenced by periods of drought or by inappropriately irrigation (Kang & Wan, 2005), temperature variations and soil moisture, during plant development, may impair productivity and the quality of final product
The objective of this study was to evaluate radish yield submitted to different combinations of doses of waterretaining polymer and water slides in drip irrigation
Summary
The radish (Raphanus sativus L.) is a small-sized plant belonging to Brassicacea family, which in cultivars of greater acceptance, produces globular roots, of bright scarlet colour and white pulp (Filgueira, 2005). The emitter responsible for the application of water is the dripper, which, according to Salomão (2012), applies water to the soil in drops, at one point and directly over plant root zone with small flows. Considering the need to increase production in view of the scarcity of water resources, the search for alternatives to optimize production in regions that face water deficits is mandatory In this sense, the use of water-retaining polymers, hydrogels, may be interesting, as they act as regulators of water availability for crops, increasing local productivity and minimizing production costs (Mendonça et al, 2013). The use of hydrogels in agriculture has been a strategy for agricultural management, due to its characteristics of soil conditioners that contribute to increase the capacity of water retention in soil, reducing the irrigation frequency, because their release occurs in a continuous flow, in the necessary amount for plants development (Venturoli & Venturoli; Rehman et al, 2011). The objective of this study was to evaluate radish yield submitted to different combinations of doses of waterretaining polymer (hydrogel) and water slides in drip irrigation
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