Fertilização orgânica de batata-doce com doses de esterco bovino e concentrações de biofertilizante

• Autor(a) principal: Santos, João Felinto dos
• Data de Publicação: 2008
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/tede/8203
• topic: Batata-doce; Adubação orgânica; Biofertilizante; Esterco bovino; Matéria seca; CIENCIAS AGRARIAS::AGRONOMIA

To evaluate the fertilization with cattle manure and concentrations of biofertilizer in potato-sweet, White Queen Cultivar, was conducted an experiment in the period from May to September 2006, the Experimental Station, Lagoa Seca - PB, EMEPA. The experimental design was a randomized complete block with four replications in Scheme split plot 6 x 4 X 2 + 1. The main plot consisted of six doses of cattle manure (0, 10, 20, 30, 40, 50 t ha-1) the subplot of four doses of biofertilizer (0, 15, 30 and 45%) and subsubplot in two ways for the implementation of biofertilizer in the soil and leaf and an additional treatment with conventional fertilization (NPK). The highest total yield of roots was 17.37 t ha-1, obtained with 30.84, t ha-1 of cattle manure and 15.39 and 13.11 t ha-1, achieved at concentrations of 29 and 28 % of biofertilizer, applied in the soil and leaf, respectively. The higher productivity of commercial roots was 13.11 t ha-1, achieved with the application of 31.24 t ha-1 of cattle manure and 11.01 and 9.70 t ha-1 obtained at concentrations of 30 and 27% of biofertilizer applied, respectively, in the soil and pot leaf. The dose cost was 22.46 t ha-1 of cattle that provided a production of 12.67 t ha-1 roots of commercial potato-sweet. The dose of 28.82 t ha-1 of cattle manure produced 4.26 t ha-1 of sweet potato non-commercial roots and the concentrations of 23 and 27%, biofertilizer applied to the soil and leaf, respectively, provided by 4.22 and 3.61 t ha-1 of roots. With 31.34, t ha-1 of cattle got up a production plant-1 of 393.82 g and the concentrations of 30 and 27% of biofertilizer applied in the soil and pot leaf, respectively, reached up 237.68 and 209.70 grams of plant-1 roots. The maximum number of commercial plant-1 roots was 2.63, reached with 31.15 t ha-1 of cattle manure and 2.10 and 1.69 plant-1 roots hit in the concentrations of biofertilizer of 29 and 18% applied in the soil and pot leaf, respectively. The maximum weight of commercial root was 302.27 g, obtained on the maximum dose of cattle and of 246.22 and 210.05 g, achieved at concentrations of biofertilizer of 26 and 33% provided by the soil and leaf, respectively . The dry leaf on the potato-sweet increased in a linear fashion with increased doses of cattle to 20, 40, 60, 80 and 100 DAP with accumulation of 66.58, 86.42, 110.14, 86.33 and 77 , 97 g, respectively, obtained with 50 t ha-1 of cattle manure. The highest levels of MO, N, P and K were 20.66 mg dcm-3, 36.58, 4.55 and 36.34 g kg-1 obtained with 40.26, t ha-1 and 50 t ha -1 of cattle, respectively. The best responses of the levels of N, P and K were achieved at concentrations of 24 to 34% of biofertilizer. The biofertilizer applied in the soil was higher than that provided to the ground for all variables studied. The organic fertilization showed behavior similar to conventional fertilization (N, P and K), for features was more productive and efficient in raising the level of OM in the soil, while the conventional had better response to the components of production and dry leaf.