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Cultivares de trigo submetidas à inoculação das sementes com Azospirillum brasilense e à aplicação de nitrogênio em quatro ambientes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Feldmann, Neuri Antonio |
| Copyright Year | 2014 |
| Abstract | The response to seed inoculation with Azospirillum brasilense in wheat is variable, depending on factors related to plant colonization by bacteria, genotype and ambient in which the association plant-bacteria occurs. Management practices have also great influence on the interaction plant-bacteria, since nitrogen (N) fertilization can affect association quality. The objective of this work was to evaluate the response of different wheat genotypes to seed inoculation with Azospirillum brasilense and to nitrogen availability in different environments. Field experiments were carried out in two sites in southern Brazil (Eldorado do Sul, RS, and Itapiranga, SC) in 2012 and 2013. Treatments consisted of different N rates applied (no N, 50 and 100 kg ha de N) and seed inoculation (with or without inoculation) in three wheat genotypes (Mirante, Quartzo e TBIO Pioneiro). Shoot dry biomass, N uptake, canopy reflectance (NDVI) as well as relative leaf chlorophyll content were evaluated. Moreover, grain yield and yield components as well as hectoliter weight were determined. Shoot biomass was affected by growing conditions and was highly variable between years and sites. In relation to N uptake, greater responses were observed in relation to N rates applied in Eldorado do Sul (RS). Canopy reflectance (NDVI) was significantly related to increase of N rates. Moreover, NDVI of cultivar Mirante was negatively affected by seed inoculation. Relative leaf chlorophyll content increased with increasing N rates applied and the response was dependent of the genotype considered. Grain yield and its components were mainly affected by N rates applied. Response to seed inoculation in general were observed only in the experiments carried out at Eldorado do Sul (RS). The results of this work indicate that the response of wheat to seed inoculation with Azospirillum brasilense is genotype-specific and associated with soils with low organic matter content. _______________________ 1 Master of Science dissertation in Agronomy, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. (92p.) August, 2014. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.lume.ufrgs.br/bitstream/handle/10183/135416/000951094.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
