Produção de mudas de Zínia elegans em substratos à base de resíduos agroindustriais e agropecuários em diferentes tamanhos de recipientes

Abstract

Produção de mudas de Zínia elegans em substratos à base de resíduos agroindustriais e agropecuários em diferentes tamanhos de recipientes(1,2) RESUMOO substrato e o tamanho do recipiente são fatores importantes para a obtenção de mudas de qualidade. Os objetivos desse trabalho foram testar oito substratos e três tipos de recipientes na produção de mudas de zínia. Os substratos foram formulados com os seguintes compostos: bagaço de cana e esterco bovino (composto 1); lixo de frutas e de verduras mais esterco bovino (composto 2); e pó da casca de coco verde, bagana de carnaúba e solo. O experimento foi conduzido em condições de casa de vegetação, e os substratos testados foram: S1= composto 1 + bagana + solo (1:2:1); S2= composto 1 + pó de coco verde + solo (1:2:1); S3= composto 1 + bagana (1:1); S4= composto 1 + pó de coco verde (1:1); S5= composto 2 puro; S6= composto 2 + bagana (1:1); S7= composto 2 + pó de coco verde (1:1); e S8= substrato comercial. Os recipientes testados foram bandejas plásticas com 228 (14 ml/célula), 150 (19 ml/célula) e 126 células (30 ml/célula), respectivamente. A percentagem de germinação foi semelhante para todos os substratos e bandejas testados. Os substratos S1 e S8 e a bandeja com 126 células mostraram os melhores resultados para as variáveis altura, massa seca da parte aérea e percentagem de sobrevivência da mudas. Palavras-chave: floricultura, compostagem, reciclagem. ABSTRACT Production of Zínia elegans seedlings using organic by-products as substrate in different container sizeThe substrate and container size are very important factors to obtain seedlings of good quality. The objectives of this study were to test eight substrates and three container sizes on the production of Zinia seedlings. The substrates were formulated by composing sugar cane bagace + bovine manure (compost 1), compost from fruits and vegetables waste + bovine manure (compost 2), green coir dust, wax palm straw and soil. The experiment was carried out under greenhouse conditions and the substrates tested were: S1= compost 1 + wax palm straw + soil (1:2:1), S2= compost 1 + green coir dust + soil (1:2:1), S3= compost 1 + wax palm straw (1:1), S4= compost 1 + green coir dust (1:1), S5= only compost 2, S6= compost 2 + wax palm straw (1:1), S7= compost 2 + green coir dust and S8= commercial substrate. The container tested were plastic trays with 228 cells (14 ml/cell), 150 cells (19 ml/cell) and 126 cells (30ml/cell) respectively. The percentage of seed germination was similar for all substrates and trays. The substrates S1 and S8 and tray with 126 cells (30 ml/cell) showed the best results for height, shoot dry matter and survival percentage of the seedlings.

Production of Antirrhinum majus seedlings on different substrates and containers

“…Mendonça et al (2003) argue that containers with a higher volume provide a better growth of the root system of seedlings. Sousa et al (2011) found that the use of trays with 126 cells was more efficient when compared with trays with 150 and 228 cells for the production of Zinnia spp. seedlings.…”

“…In the production of Zinnia elegans seedlings in trays with 126 cells, there was an increased seedling development, with a greater height, shoot dry matter and percentage of survival (Sousa et al, 2011). In addition, the container size used in seedling production directly affects the final cost.…”

Use of alternative waste wood substrates in the production of seedlings zinnia

“…The highest percentage of emergence 51.5 and 55% of seeds in substrates containing SM + SS and SM + SS + SA can be attributed to favorable conditions to germination, such as the availability of water and oxygen in quantities and ideal proportions. According to Souza et al (2011), there are some factors that interfere in the germination process of seeds in different substrates such as light, oxygen, temperature and water, beside of conditions inherent to the seed as numbness. Another considerable factor on the germination capacity is the genotypic inheritance.…”

“…It presents flowers of the type daisy simple, folded or frizzy, often used in parks and gardens of tropical and subtropical regions. It is an ornamental plant also cultivated for the production of cut flowers (Szopińska and Politycka, 2016) because of their long-term durability, being suitable, also, for the lawn hedge row and massive in full sun in regions of mild and tropical temperatures (Souza et al, 2011). Since a few years ago, the system for produce seedlings is getting modern and advanced on their technological level, because of the adaptation of new techniques, like protected cultivation, intermittent nebulization, climate control in the greenhouses and the use of modern inputs, such as re-usable containers, sterile and biodegradable substrates.…”

Desenvolvimento em campo de espécies da Caatinga com o uso de resíduo de carnaúba

“…O resíduo da bagana de carnaúba é abundante nas regiões de ocorrência dessa palmeira e utilizado com sucesso nas diversas etapas do desenvolvimento das mudas, desde a germinação até o estabelecimento em campo. No entanto, tem ocupado lugar de destaque na composição de substratos, sendo recomendado por diversos autores (SOUSA et al, 2012;ALBANO et al, 2017;SILVA et al, 2017).…”