Produção e avaliação bromatológica de espécies forrageiras irrigadas com água salina

Abstract

RESUMOUma das alternativas para a destinação de rejeito de dessalinizadores é a utilização em tanques de piscicultura e carcinocultura e posterior reúso na irrigação de culturas tolerantes a salinidade. O trabalho foi conduzido no município de Barra de Santa Rosa, PB, objetivando verificar a taxa de germinação da semente, brotação das mudas e características bromatológicas de maniçoba (Manihot glaziovii Muell Arg), erva-sal (Atriplex nummularia), flor de seda (Calotropis procera) e jureminha (Desmanthus virgatus), cultivadas e irrigadas com água excedentes de tanques de piscicultura e carcinocultura, oriundos de rejeito de dessalinizadores, com condutividade elétrica de 5.800 e 5.200 S cm -1 , respectivamente. A flor de seda e erva-sal apresentam maiores taxas de germinação (96,0%) e brotação (70,0%), respectivamente, seguidas da taxa de brotação da maniçoba (62,0%) e da jureminha (51,0%). Do total de mudas transplantadas 95,0; 93,0; 82,7 e 80,5% das plantas de flor de seda, maniçoba, atriplex e jureminha, foram viáveis, respectivamente. As forrageiras apresentaram boa taxa de brotação e germinação e propagação e boa composição bromotologica, onde a jureminha e o atriplex apresentaram teor de proteína, matéria orgânica e energia bruta de 9,4 e 17,8%; 95,0 e 76,3% e 4.295,8 e 3.575,9 cal g -1 de energia bruta, respectivamente.Palavras-chave: água residuária, alimentação animal, rejeito do dessalinizador Production and bromatological evaluation of forage species irrigated with saline water ABSTRACT One of the alternatives for the disposal of desalinization waste is its use in fishponds and shrimp production and later reuse for irrigation of crops tolerant to salinity. This work was conducted in Barra de Santa Rosa, PB, with the aim of verifying the rate of seed germination, sprouting and bromatologic characteristics of maniçoba (Manihot glaziovii Muell Arg), erva-sal (Atriplex nummularia), silk flower (Calotropis procera) and `jureminha` (Desmanthus virgatus), cultivated and irrigated with excess water of fishponds and shrimp production, coming from desalinization waste, with electrical conductivity of 5,800 and 5,200 S cm -1 , respectively. The silk flower and salt herb had higher rates of germination (96.0%) and spouting (70.0%), respectively, followed by the rate of sprouting of maniçoba (62.0%) and jureminha (51.0 %). Of the total transplanted, 95.0, 93.0, 82.7 and 80.5% of plants of silk flower, maniçoba, atriplex and mimosa were viable, respectively. Forages had good rate of germination and sprouting and spreading, and good bromatological composition, where as `jureminha` and atriplex presented protein content, organic matter and gross energy 9.4 and 17.8%; 95.0 and 76.3%; and 4,295.8 and 3,575.9 cal g -1 of gross energy, respectively.

GENETIC DIVERSITY AMONG Calotropis procera (Aiton) WT Aiton GENOTYPES ACCORDING TO SEED PHYSIOLOGICAL QUALITY

“…In the vegetal species domestication process, information concerning seed physiological potential, particularly germination and plantlet growth evaluations, constitutes an initial stage in developing a cultivation system. Consequently, C. procera seed germination has been well studied, particularly regarding various temperatures (SILVA et al, 2009;OLIVEIRA-BENTO et al, 2013) and substrates (SILVA et al, 2009;OLIVEIRA-BENTO et al, 2013), as well as wastewater use (CARVALHO JÚNIOR et al, 2010), and seed storage conditions (OLIVEIRA-BENTO et al, 2015). However, there is a lack of published information concerning the physiological potential of its seeds after long storage periods, in particular, characterizing germination variability in the species' genotypes.…”

Agronomic performance in radish fertilised with Calotropis procera (Ait.) R. Br. in two growing seasons

“…Em situações de seca severa, como nos últimos anos, a C. procera se sobressai em relação às espécies citadas acima, uma vez que tem a capacidade de germinar e acumular fotoassimilados mesmo quando submetida a estresses térmicos, hídricos e salinos (CARVALHO JÚNIOR et al, 2010;SOUTO et al, 2008). Outra característica importante da C. procera é sua rebrota vigorosa após o corte, conferindo a essa planta maior facilidade de manejo e obtenção (ANDRADE et al, 2008).…”

Beetroot production using Calotropis procera as green manure in the Brazilian Northeast semiarid

“…The C. procera belongs to the Apocynaceae family, with wide geographical distribution, particularly in arid and semiarid conditions (Souto et al, 2008;Carvalho Júnior et al, 2010). This species remains lush and green throughout the year, forming a shrub that is fast growing and exhibits vigorous regrowth, with a production capacity of approximately 700 kg of dry matter per hectare within 60 days after cutting (Andrade et al, 2008).…”