Cultivo agroecológico de berinjeleira sob doses de adubação orgânica em coberturas vivas perenes

Abstract

Palavras-chave: Solanum melongena, Arachis pintoi, Paspalum notatum, "cama" de aviário, plantas de cobertura do solo. ABSTRACT Agroecological cultivation of eggplant under different doses of organic fertilization using perennial species as cover cropsAgronomic performance of eggplant was evaluated under organic management, comparing perennial grass and legume species as cover crops. The trial was carried out in Seropédica, Rio de Janeiro state, Brazil, using a randomized block design with a split plot arrangement and three replications. The evaluated treatments in the plots were forage peanut (Arachis pintoi) as cover crop, Bahia grass (Paspalum notatum) as cover crop, and conventional soil tillage (control). Split plot treatments were represented by increasing dosages of poultry litter, corresponding to 120, 240, 480, and 720 g plant -1 , which were partitioned through the eggplant cycle. The viability of forage peanut used as living mulch for eggplants was evidenced by the fact that its results did not differ statistically from conventional soil tillage for yield, number of fruits per hectare and average fruit weight of eggplant. The only exception is related to the use of forage peanut associated to the greatest dosis of organic fertilizer (720 g plant -1 ), which has shown superior results when compared to conventional soil tillage. Maximum values were obtained with poultry litter dosage of 600 g plant -1 (60.63 t ha -1 ) and 480 g plant -1 (55.80 t ha -1 ) for forage peanut and soil tillage treatments, respectively. On the other hand, Bahia grass did not allow to reach maximum eggplant yield, even at the highest dosage of poultry litter, indicating competition imposed by the cover crop. The results indicate agronomic feasibility of eggplant grown under agroecological management, with forage peanut as soil cover crop. The highest yield of eggplant was obtained with the use of 600 g plant -1 of poultry litter.

Gas exchange and chlorophyll content in tomato grown under different organic fertilizers and biofertilizer doses

“…Among the tomato cropping systems, organic fertilization needs to be highlighted because it improves the soil and the plants, resulting in production reductions, since the producer can replace the commercial substrate with inputs found on the site (Oliveira et al, 2013a). In addition, the demand for organic products has expanded in recent times, opening possibilities of adding value to products (Santos et al, 2013). The tomato crop responds satisfactorily to organic fertilization, however, factors such as type and quantity of fertilizers are determinant in improving plant growth and adequate development (Mueller et al, 2013, França et al, 2017.…”

“…The response of organic fertilization has been positively verified as a viable alternative in the production of different vegetables, such as tomato (Yanar et al, 2011;Mueller et al, 2013;França et al, 2017), okra (Oliveira et al, 2013b;Gomes et al, 2017), sugar beet (Gondim et al, 2015), eggplant (Santos et al, 2013) and gherkin (Oliveira et al, 2014).…”