Azospirillum brasilense inoculation efficiency associated with rooting growth and production of lettuce
Journal Title: Revista Verde de Agroecologia e Desenvolvimento Sustentável - Year 2017, Vol 12, Issue 2
Abstract
In the survey evaluated the effect of Azospirillum brasilense (AzBr) inoculated with and without rooting, on growth, biomass production and lettuce pest resistance, cultivar Lucy Brown. The experiment was conducted in a greenhouse in plastic bags with 8.0 L capacity in the spacing, 40 x 20 cm. The experimental followed a design randomized blocks in a factorial scheme (2x3) +1, the first factor, Azospirillum with and without rooting growth and second fator, levels of nitrogen in coverage, 0%, 50% and 100% of fertilizer recommendation and a control with conventional fertilization, with four replications. At mean doses of 50% N in coverage, both AzBr and the AzBr plus rooting association showed a significant increase in fresh shoot and root mass of 19.36% and 23.66%, respectively, in relation to maximum dose of N and the control. The shoot dry mass did not differ significantly in the different treatments, although it has shown a small increase with increasing doses of N. The dry root mass decreased 29.24% in the treatment with 100% N, when compared to treatment without nitrogen cover more AzBr. The final plant stand was significantly higher in the treatment in wich N was not applied in coverage, especially inoculation with AzBr, mean of 96.98% of established plants, against 51.56% in conventional control, observing that average dose of N, there was a greater tolerance of plants to symptoms of leaf mining and the viruses of Tospovirus Group.
Authors and Affiliations
Antonio Anicete de Lima, Luciano dos Reis Venturoso, Bruno Antonio Azevedo Silva, Osvino Schimid, Aniquely Ferreira Gomes
Keywords
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- EP ID EP253630
- DOI 10.18378/rvads.v12i2.4300
- Views 113
- Downloads 0
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