Broccoli yield in response to top-dressing fertilization with green manure and biofertilizer

Revista Ceres

Gilberto Bernardo De Freitas²  Márcio Sousa Rocha¹  Ricardo Henrique Silva Santos²  Letícia Monteiro Da Silva Freitas¹  Leandro De Almeida Resende¹ 

[1] ,Universidade Federal de Viçosa Departamento de Fitotecnia Viçosa Minas Gerais ,Brazil

关键词: Organic horticulture;    organic fertilization;    Gliricidia sepium (Jacq.);    biofertilizer;    Brassica oleracea L. var. italica;    Olericultura orgânica;    adubação orgânica;    Gliricidia sepium (Jacq.);    biofertilizante;    Brassica oleracea L. var. italica;   

DOI  :  10.1590/S0034-737X2011000500016

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate the productive performance of broccoli under different top-dressing organic fertilizations. The experiment was conducted under protected cultivation, in a completely randomized design with four replications, with two plants per experimental unit. Broccoli seedlings were produced in a commercial substrate in styrofoam trays. The seedlings were transplanted to plastic pots containing 10.0 L of substrate made up of subsoil and organic compost at the ratio of 3:1 (v/v), respectively, which is equivalent to about 20.0 t ha-1 of organic compost at planting. After seedling establishment, the top-dressing fertilization treatments were applied: gliricidia biomass associated or not with liquid biofertilizer of cattle manure to the soil and bokashi. Two control treatments were established: one with mineral fertilization recommended for the crop and the other without top-dressing fertilization. The broccoli production was evaluated (commercial standard). Plants that received mineral fertilizer were more productive, however, they were not significantly different (p>0.05), by Dunnet test, from the plants fertilized with 2.5 t ha-1 gliricidiabiomass (dry mass) associated with liquid biofertilizer (2.0 L m-2) applied to soil. Top-dressing fertilizations with only gliricidia, at 2.5 and 5.0 t ha-1 of biomass (dry mass), resulted in no significant increase in production of broccoli inflorescence. The use of bokashi in addition to gliricidia biomass and liquid biofertilizer reduced the efficiency of the fertilization compared with plants that received only gliricidia and liquid biofertilizer.

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