Efeito de substratos e boro no enraizamento de estacas de pitaya

Abstract

Substrates and boron on the rooting of red pitaya cuttingsPitaya, a climbing fruit species belonging to the cactus family, has been largely commercialized in the Brazilian exotic fruit market. This study aimed to evaluate the effect of different substrates on the rooting of cladodes with the base immersed or not in boric acid solution. There was also evaluated the formation and initial development of roots, resulting in more vigorous, high-quality seedlings with higher survival rates. The experiment was carried out in a lath house of the Department of Plant Production, Horticulture Sector, College of Agronomical Sciences, Botucatu Campus, São Paulo State University (UNESP). The experiment was arranged in a complete randomized design, in a 4x2 (substrates x boron) factorial arrangement, with four replicates. Sixty days after the experiment establishment, shoot fresh and dry matter, root fresh and dry matter, and the highest root length were evaluated. The initial root growth and development of cuttings were affected by the substrates and boron. Sand+manure provided higher phytomass accumulation in the shoot and root system of red pitaya. Among the substrates, the treatment sand + cattle manure was the most suitable to produce more vigorous and high-quality seedlings.

Growth of pitaya seedlings according to the type of substrate and the frequency of irrigation

“…Galvão et al (2016), when analyzing plant growth in different substrates, concluded that soil and a mixture of sand and soil led to higher shoot fresh matter, shoot dry matter, and root dry matter, whereas sand resulted in higher root fresh matter. In line with these data, Santos et al (2010a) reported that washed sand led to higher root fresh matter and that substrates containing composted cattle manure (rich in organic matter) produced plants with higher shoot fresh matter.…”

“…Cladodes (photosynthetic shoots) respond well to soil organic matter but develop extensive root systems in sand (Mizrahi & Nerd, 1999). Thus, a mixture of sand and a substrate rich in organic matter (such as composted cattle manure) is most suitable for obtaining strong, highquality plants from cuttings (Silva et al 2006;Santos et al 2010a).…”

Brown seaweed extract enhances rooting and roots growth on Passiflora actinia Hook stem cuttings

“…Zinc can enhance rooting because it is involved in the biosynthesis of tryptophan, an auxin precursor (SCHWAMBACH et al, 2005). Boron, in turn, plays an important role in cell elongation and is considered a rooting cofactor, since it acts synergistically with endogenous auxin, facilitating its transport through the cell membranes (SANTOS et al, 2010;TAIZ and ZEIGER, 2013). These components taken together can explain the better performance for rooting and roots growth in P. actinia stem cuttings and also highlight the possibilities for using these extracts as alternative plant growth regulators.…”

Wound healing properties and mucilage content of Pereskia aculeata from different substrates

“…As expected, the influence of the cattle manure is notorious on treatments T4 and T5, leading to the best values of height and total mass. It is well known that manure is an important source of nutrients, improving the humus quantity and water retention capacity of sandy soils (Chang et al, 2007, Santos et al, 2010. Although both growth and phytomass gain due to cattle manure treatment is notorious, the same is not observed in relation to mucilage content.…”