Crescimento, teor e acúmulo de nutrientes em hipobiotos de caramboleiras, cultivados em diferentes soluções nutritiva

Abstract

Growth, content and nutrient accumulation in hypobiotes of star fruit grown in different nutrient solutionsBrazil is one of the largest star fruit producers in the world, however, there is little scientific information, especially on mineral nutrition contributing to the production of star fruit. The objective of this study was to evaluate the effect of nutritive solutions on the development and the nutritional status of star fruit hypobiotes (root-stocks). The experiment was arranged in a completely randomized design, with four nutritive solutions and five repetitions The Hoagland & Arnon solution was used as standard, for comparison with the other three solutions. The experiment was carried out in a greenhouse, using 8 L plastic containers. Shoot dry matter and nutrient accumulation in the various plant parts were determined at 150 days after transplanting. The nutritive solutions by Furlani, Castellane & Araújo and Sarruge gave similar dry mass yield of whole plant for the star fruit hypobiotes. The Hoagland & Arnon solution resulted in reduced dry mass of the whole plant and accumulation of nutrients, except of N, Ca and Fe. Nitrogen and potassium are the most needed nutrients at the initial plant development stage.

Growth and nutrient accumulation in the aerial part of red Pitaya (Hylocereus sp.)

“…At the end of the experimental period (360 days), the accumulation of macronutrients in the total dry matter of the aerial part (cladodes, flowers and fruits) of pitaya occurred in the following descending order: K > Ca > N > P > Mg > S. These results show that potassium and calcium were the most required nutrients by red pitaya ( FIGURE 3A). This order of nutrient accumulation differed from that observed by Diógenes (2017), who reported the following order in the accumulation of macronutrients in the aerial part of another species of pitaya (Hylocereus undatus): K > N > Ca > Mg > P > S. According to Rozane et al (2011), variations in nutrient accumulation can occur when different genetic materials and growing media are employed.…”

Production of Star Fruit Rootstocks Fertilized With Different Boron Doses

“…However, cultivation conditions (substrate and nutrient solution) are different and it must be taken into consideration. In general, increased speed of growth and development of plants are studied in soilfree cultivation, allowing a better control of nutrient ratios such as nutrient solutions (ROZANE et al, 2011) since the concentration of elements in the nutrient solution is proportional to that found close the plant roots (ADAMS, 1994). Lucena (1997) pointed out that the results obtained in nutrient solution are more accurate when compared to those obtained in the cultivation with soil, in addition to representing a lower cost in terms of chemical analysis.…”

“…In guava seedlings,Salvador et al (2003) observed symptoms of visual abnormalities caused by boron excess. These symptoms started 120 days after transplantation to pots and were associated with a dose of 3.0 mg L −1 of nutrient solution Rozane et al (2011). studied star fruit rootstocks from the cultivar Malaysia and did not observe a significant effect of treatments on height, stem diameter, the number of leaves, leaf area, and dry matter of stem mass in the nutrient solutions tested.…”

“…In perennial crops, seedling quality is directly related to agricultural yield and high productivity, reflecting in the economic return on invested capital (FREITAS et al, 2011). Star fruit is a rustic plant (DONADIO et al, 2001), presenting a certain tolerance to few variations in nutrient concentrations (ROZANE et al, 2011). However, management and fertilization practices are important to provide the necessary nutrients to plants, maintaining the nutritional balance and leading to a good development and productivity.…”

Mineral nutrition evolution in the formation of fruit tree rootstocks and seedlings

“…Adequate nutrition guarantees shoot growth and enables better development of the root system and exploration of larger substrate volumes, which contributes to increase water and nutrient absorption. As pointed out by Arouca et al (2011) and Rozane et al (2011a) for 'Tahiti' lime and star fruit, respectively, roots are responsible for 30% and 26% of total dry matter.…”