Waste use as substrate to yield guava seedlings

Abstract

The guava tree (Psidium guajava L.), considered a rustic plant, can be found growing naturally in low-fertility soils. However, when commercially cultivated it needs considerable amounts of fertilizers and soil correctives to attain good yields. These special measures for cultivation start with choice of a suitable substrate to grow good-quality seedlings, allowing them to reach their full productive potential. The aim of this work was to study the effect of different substrates (S 1 -soil, S 2 -vermiculite+soil+fine sand, S 3 -cattle manure+soil+fine sand, S 4 -commercial substrate+soil+fine sand, S 5 -urban compost+soil+fine sand, S 6 -sewage sludge+soil+fine sand, S 7 -earthworm compost+soil+fine sand, S 8 -chopped sugarcane bagasse+soil+fine sand, and S 9 -sugarcane filter cake+soil+fine sand) in completely randomized design with four replicates on the development and nutritional state of guava seedlings. The result showed that the best substrates were vermiculite+soil+fine sand; earthworm compost+soil+fine sand; sugarcane bagasse+soil+fine sand, and filter cake+soil+fine sand. The use of sewage sludge and urban trash compost should be further studied for the composition of substrates. Key words: Psidium guajava, nutritional state, compost mixture, seedling quality, growth ResumoA goiabeira, considerada uma planta rústica, pode ser encontrada vegetando em estado nativo em solos de baixa fertilidade, porém, quando cultivada comercialmente necessita de quantidade considerável de fertilizante e corretivo para obter boa produtividade. A preocupação no cultivo começa já na fase inicial de desenvolvimento com a escolha de um substrato adequado na formação de mudas de qualidade, permitindo que as mesmas expressem todo seu potencial produtivo. O objetivo desse trabalho foi verificar o efeito de diferentes substratos (S 1 -terra, S 2 -terra+areia fina+vermiculita, S 3 -terra+areia fina+esterco bovino, S 4 -terra+areia fina+substrato comercial, S 5 -terra+areia fina+substrato de lixo urbano, S 6 -terra+areia fina+lodo de esgoto, S 7 -terra+areia fina+húmus de minhoca, S 8 -terra+areia fina+bagaço de cana e S 9 -terra+areia fina+torta de filtro) em delineamento inteiramente casualizado com quatro repetições no desenvolvimento e estado nutricional de mudas de goiabeira. Os melhores substratos para formação de mudas foram obtidos com vermiculita+terra+areia fina; húmus de minhoca+terra+areia fina; bagaço de cana+terra+areia fina e torta de filtro+terra+areia fina. A utilização de lodo de esgoto e composto de lixo urbano deve ser mais bem avaliada para a composição de substratos. Palavras-chave: Psidium guajava, estado nutricional, mistura de composto, qualidade das mudas, crescimento

Estabilidade e adaptabilidade de cultivares de alface em diferentes substratos

“…After considering the genetic characteristics of the cultivar and seed quality, the choice of the substrate is the main step, as it is the input that is directly linked to the final quality of seedlings, with effects on commercial yield (Oliveira & Panno, 2011). The substrate must be pathogen-free and have chemical and physical composition, capable of providing water, air and nutrients that enable rapid germination/emergence and seedling development (Salvador et al, 2013).…”

NPK application in yellow pitaya seedlings grown on sand and organic compost

“…The use of substrates as a technique of plant cultivation began in the 1930s; however, the interest in systems that use different substrates has only increased in recent years (ARRUDA et al, 2007;SALVADOR et al, 2013;PISSINATI et al, 2018). This technique of seedling cultivation has gained diffusion because it allows better utilization of nutrients, higher glue index, and better quality of seedlings.…”

Effects of sewage sludge and length on initial growth of guava seedlings

“…Thus, sewage sludge must meet the necessary requirements for the concentration of heavy metals and pathogens, according to the legal norms which determine the limit of metal concentrations, the maximum cumulative loads permitted for use in agricultural soils, presence of pathogens and the species for which its use is recommended (Brasil, 2006). Salvador et al (2013), working with the waste use substrate to yield guava seedlings, observed that the treatment containing sewage sludge presented a negative effect on the growth of the plants.…”