RESUMOObjetivou-se, neste trabalho, avaliar o crescimento aéreo e radicular de cultivares e híbridos de milheto em solo submetido a quatro níveis de compactação do solo. Foram utilizados sete híbridos de milhetoPennisetum glaucum L. (40425, 40853, 41312, 51499, 60018, 60019 e ADR7010) e as variedades ADR300 e ADR500; aos 30 dias após o plantio determinaram-se as massas da matéria seca da parte aérea e das raízes, a densidade do comprimento radicular e o diâmetro médio radicular. Na densidade de 1,74 Mg m -3as cultivares e híbridos de milheto apresentaram uma redução elevada da massa verde da parte aérea, massa seca da parte aérea, altura de plantas e área foliar. Os híbridos 40853 e 60019 apresentaram comportamento inferior aos demais híbridos e cultivares na produção de matéria verde e seca da parte aérea e altura de plantas na densidade de 1,65 Mg m -3 . As cultivares ADR500 e ADR300 e os híbridos 40425 e 51499 se destacaram na produção de massa verde e seca e altura de plantas na densidade de 1,65 kg m -3 . A maior densidade de comprimento radicular média entre as cultivares de milheto foi verificada na densidade do solo de 1,46 Mg m -3 . A cultura do milheto demonstrou potencial como planta descompactadora do solo. Palavras-chave: densidade do solo, sistema radicular, plantas de coberturaPerformance of cultivars and hybrids of millet in a soil submitted to compaction ABSTRACT The objective of this study was to evaluate the root and aerial growth of cultivars and hybrids of pearl millet in soil under four levels of soil compaction. Seven hybrids of pearl millet -Pennisetum glaucum L. (40425, 40853, 41312, 51499, 60018, 60019 and ADR7010) and ADR300 and ADR500 varieties were used. At 30 days after planting, the dry mass of shoots and roots, root length density and root mean diameter was determined. In the density of 1.74 Mg m -3 varieties and hybrids of pearl millet showed a high reduction of green matter, dry mass of shoots, plant height and leaf area. Hybrids 40853 and 60019 produced less than other hybrids and cultivars in the production of green and dry matter of shoots and plant height in the density of 1.65 Mg m -3 . The ADR500 and ADR300 varieties and hybrids 40425 and 51499 excelled in the production of green and dry mass and plant height in the density of 1.65 kg m . The millet crop showed potential for descompaction of soil.
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