Telas de Sombreamento e Substratos na Produção de Mudas de Dipteryx alata Vog.

Abstract

RESUMOEste trabalho avaliou tecnologias de ambientes protegidos e substratos para a produção de mudas de Dipteryx alata Vog. Foram utilizados dois ambientes protegidos: telado agrícola, fechamento em 90° graus, com tela preta nas laterais e aluminizada na cobertura, ambas de 50% de sombreamento; telado agrícola, fechamento em 45° graus, com tela preta nas laterais e cobertura, de 50% de sombreamento. Em cada ambiente foram testados substratos de mistura de esterco bovino (E) e vermiculita (V): 100% E + 0% V; 90% E + 10% V; 80% E + 20% V; 70% E + 30% V; 60% E + 40% V; 50% E + 50% V; 40% E + 60% V; 30% E + 70% V; 20% E + 80% V; 10% E + 90% V. O telado preto propiciou mudas de melhor qualidade e os substratos com baixas porcentagens de esterco (10, 20 e 30%) são os mais propícios para a formação de mudas de Dipteryx alata Vog.Palavras-chave: baru, esterco bovino, vermiculita, ambientes protegidos. Shading Screens and Substrates for Dipteryx alata Vog. Seedling Production ABSTRACTThis study evaluated the technologies of protected environments and substrates for the production of Dipteryx alata Vog. seedlings. Two protected environments were used: agricultural screened, closing at 90 degrees, with black screen on the sides and aluminized screen on the cover, both with 50% shading; agricultural screened, closing at 45 degrees, with black screen on the sides and cover, both with 50% shading. In each environment, substrates composed of mixture of cattle manure (E) and vermiculite (V) at the following ratios were tested: 100% E + 0% V; 90% E + 10% V; 80% E + 20% V; 70% E + 30% V; 60% E + 40% V; 50% E + 50% V; 40% E + 60% V; 30% E + 70%; 20% E + 80% V; 10% E + 90% V. The black screen environment propitiates seedlings of better quality and the substrates with low percentages of cattle manure (10, 20 and 30%) are the most propitious for the formation of Dipteryx alata Vog. seedlings.

Protected Environments and Substrates for Achachairu Seedlings

“…Better Acrocomia Aculeata seedlings were observed in Aluminet ® , when compared to Sombrite ® and to the greenhouse with low density polyethylene (Costa et al, 2014). However, Costa et al (2012b) did not find differences between the Sombrite ® and Aluminet ® , both with better results than in the agricultural greenhouse for 'baruzeiro' seedlings (Dipteryx alata), diverging from Costa et al (2015) who reported better baruzeiro seedlings in Sombrite ® compared to Aluminet ® . The amount of photo-assimilates available to be used in the vegetable grown in relation to dry matter mass in the different organs, receives direct influence of the environmental conditions.…”

“…In this substrate (S6) is observed higher amount of manure than in substrates S4, S12 and S13 (Table 1) with higher nutrients (Table 2) which allowed greater accumulation of mass in the shoot dry mass of the achachairu seedlings. Some studies do not recommend using more than 30% of cattle manure in substrates for some species; other authors recommend no more than 10 or 20%, such as Costa et al (2015) for baruzeiro, Dias et al (2009b) and Silva et al (2009) for mangabeira, Dias et al (2009a) for coffee plant, a fact not verified for achachairu that was adequately adapted to substrates containing up to 50% of cattle manure.…”

“…High quality seedlings must possess superior genetic quality, well formed, free of phytopathogenic organisms, without physical damages, free of weeds, low cost, easy handling and commercialization (Minami, 1995) associated to a robust and well distributed root system with low distribution of aerial and root phytomasses (desirable from 1 to 2), low relation height and stem diameter and higher quality Dickson indexes (Costa, et al, 2011, Costa et al, 2015, Arrua et al,2016, Sanches et al, 2017.…”

Growth and quality of Garcinia humilis seedlings as a function of substrate and shading level

“…Dipteryx alata Vog. seedlings, for example, have a lower dry matter yield in substrates with a higher proportion of cattle manure (Costa et al 2015), the same happening for Hancornia speciosa seedlings (Dias et al 2009).…”

Growth and Quality of Papaya 'Tainung 01' Seedlings Submitted to Different Irrigation Depths

“…According to Carneiro [14], this is a nondestructive and easily measured feature standing as a parameter for transplanting seedlings into et al [15] and [6], PH cannot be used alone to determine seedling quality and should be used join stem diameter and aerial part biomass to do The number of leaves (NL) had an average of 9.6 leaves in all applied treatments (Fig. 7).…”