Abstract
The viability of the use of brackish water in the hydroponic cultivation of vegetables cannot dispense with auxiliary techniques such as water mixing and the use of plant densities. In this sense, the objective of the present work was to analyze the growth and production of sweet pepper, cv. All Big, under hydroponic conditions, under different levels of electrical conductivity of the nutrient solution (1.7, 3.7, 5.7, 7.7, 9.7 and 11.7 dSm however, the results were submitted to analysis of variance, at a 0.05 probability level. The interaction between the electrical conductivity of the nutrient solution and the density of plants influenced the behavior of the growth and production variables of pepper (All Big). It was verified that the pepper plants had better performance of the biometric variables plant height, stem diameter and number of leaves when cultivated every 30 cm. At the time, in the analysis by plant, the production of pepper fruits was more expressive when spacing of 30 cm was adopted, however, in the tube of six meters, when 20 cm of spacing was used, the number of fruits was on average, 26.38% and 16.40% higher than lower density, in the electrical conductivities 1.7 and 11.7 dS·m-1.
Highlights
The capsicum (Capsicum annuum L.), belonging to the solanaceae family, is considered a tropical climate crop and from the economic point of view, it is among the ten most important vegetables in the Brazilian market in natura form
The interaction between the electrical conductivity of the nutrient solution and the density of plants influenced the behavior of the growth and production variables of pepper (All Big)
In the analysis by plant, the production of pepper fruits was more expressive when spacing of 30 cm was adopted, in the tube of six meters, when 20 cm of spacing was used, the number of fruits was on average, 26.38% and 16.40% higher than lower density, in the electrical conductivities 1.7 and 11.7 dS∙m−1
Summary
The capsicum (Capsicum annuum L.), belonging to the solanaceae family, is considered a tropical climate crop and from the economic point of view, it is among the ten most important vegetables in the Brazilian market in natura form It is one of the five crops with the highest area under protected cultivation since production under field conditions is limited due to several factors, for example, sensitivity to water stress and moderate sensitivity to salinity [1]. Pepper plants show symptoms such as dark bluegreen leaf color, leaves with a higher thickness of cerosity; in the roots, there may be a decrease in elongation and suberization, so that such effects result in morphological and anatomical alterations and in the reduction of transpiration, growth and plant production [5], corroborating [6] These authors verified a linear decrease in the height of the pepper plants, All Big cultivate, number of leaves and leaf area with increase of salinity
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