2006
DOI: 10.1111/j.1744-7348.2006.00101.x
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Nitrogen use efficiency. 1. Uptake of nitrogen from the soil

Abstract: The nitrogen use efficiency (NUE) of crop plants can be expressed very simply as the yield of nitrogen per unit of available nitrogen in the soil. This NUE can be divided into two processes: uptake efficiency, the ability of the plant to remove N from the soil normally present as nitrate or ammonium ions, and the utilisation efficiency, the ability of the plant to transfer the N to the grain, predominantly present as protein. In this article, we have highlighted the latest developments in the isolation and cha… Show more

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Cited by 190 publications
(135 citation statements)
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“…Plants can store large amounts of nitrate in their vacuoles and have in addition at least four different transport systems operating. Additionally many plant species can modify their root architecture to improve uptake and lateral roots will proliferate in nutrient rich soil patches [19]. We demonstrated in our experiments making a vertical cross cutting of one of the beds (using a spade), that roots concentrated just below the drip pipes seeking for water and nutrients (Fig.…”
Section: Soil Ion Concentrationmentioning
confidence: 87%
“…Plants can store large amounts of nitrate in their vacuoles and have in addition at least four different transport systems operating. Additionally many plant species can modify their root architecture to improve uptake and lateral roots will proliferate in nutrient rich soil patches [19]. We demonstrated in our experiments making a vertical cross cutting of one of the beds (using a spade), that roots concentrated just below the drip pipes seeking for water and nutrients (Fig.…”
Section: Soil Ion Concentrationmentioning
confidence: 87%
“…A preferência das plantas pela fonte de N pode variar conforme as pressões seletivas e consequentes adaptações fisiológicas (Terce-Laforgue et al, 2004). As formas mais comuns e disponíveis no solo são a forma nítrica (NO 3 -) e a amoniacal (NH 4 + ), sendo a primeira mais abundante e melhor assimilada pelas plantas (Lea & Azevedo, 2006), em consequência do processo de nitrificação por bactérias. Porém, a depender das condições do solo, a forma amoniacal pode ser a mais abundante pela inibição desses organismos (Miller & Cramer, 2004).…”
Section: Introductionunclassified
“…bras., Brasília, v.44, n.6, p.590-598, jun. 2009 vitaminas, aminoácidos e proteínas presentes no grão (Lea & Azevedo, 2006). Na tentativa de transformar o milho num alimento mais completo nutricionalmente, uma abordagem com exploração dos controles genéticos conhecidos de teores de nutrientes nos grãos de milho, associada ao aumento no aproveitamento de N pela planta e na sua conversão em proteína, sem prejuízo acentuado no rendimento de grãos, representa grande desafi o a ser alcançado pelo melhoramento genético.…”
Section: Introductionunclassified