DISCRIMINATION OF MAIZE LINES AS TO NITROGEN UTILIZATION THROUGH EVALUATION OF ROOT SYSTEM CHARACTERISTICS
| Autor: | MARCELO OLIVEIRA SOARES, IVANILDO EVÓDIO MARRIEL, PAULO CÉSAR MAGALHÃES, LAURO JOSÉ MOREIRA GUIMARÃES, FERNANDO RODRIGO DE OLIVEIRA CANTÃO, MICHEL CASTELLANI DA ROCHA, GERALDO AFONSO DE CARVALHO JÚNIOR, GLAUCO VIEIRA MIRANDA |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Revista Brasileira de Milho e Sorgo, Vol 8, Iss 1, Pp 93-103 (2009) |
| Druh dokumentu: | article |
| ISSN: | 1676-689X 1980-6477 |
| Popis: | The objective of this study was to discriminate maize inbred lines byevaluating root characteristics obtained by digital images analysis when different nitrogen (N) rates were applied. Six maize inbred lines from Embrapa Maize and Sorghum were grown in five liter pots containing Red Latosol – medium textured, and two different N rates (zero and 2 mmol. L-1) were used. Nitrogen was applied as ammonium nitrate. A randomized complete blocks design was used, with three replications. Root and shoot features were evaluated on plants harvested 23 days after sowing. Significant interactions were observed between strains and N rates for root length, root surface area, very fine root length, surface area of very fine roots, surface area of thick roots, very fine root volume, shoot dry matter and total dry matter. The inbred line CMS 28-7.1 showed a lower very fine root volume/total root volume ratio compared to the other inbred lines. At low N availability, root characteristics allowed to distinguish maize inbred lines and very fine roots volume. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|