Nutritional requirements of Brachiaria and adaptation to acid soils
Rao, Idupulapati Madhusudana
Nutritional requirements of Brachiaria and adaptation to acid soils - p. 53-71
Most commercial Brachiaria species are adapted to low-fertility acid soils of the tropics. We describe, with examples, some of the attributes that enable them to adapt. These include the ability to (1) maintain root growth at the expense of shoot growth; (2) acquire and use both nitrate and ammonium forms of N; (3) acquire N through associative fixation; (4) acquire p through extensive root systems and association with vesicular-arbuscular mycorrhizae; and (5) acquire Ca through extensively branched roots with large numbers of root tips. Although Brachiaria species have much lower internal requirements, especially of p and Ca, than do other grasses such as Panicum maximum, they show interspecific differences, which we describe. We also developed a system to diagnose mineral nutrient disorders by visual symptoms in B. decumbens cv. Basilisk, and describe our results. We offer a list of priorities for further research.
Brachiaria
Plant nutrition
Acid soils
Productivity
Nutrient uptake
Nitrogen fixation
Nitrogen
Phosphorus
Vesicular arbuscular mycorrhizae
Liming
Fertilizer application
Colombia
Brachiaria
Nutrición de las plantas
Suelo ácido
Productividad
Absorción de sustancias nutritivas
Fijación del nitrógeno
Nitrógeno
Fósforo
Micorrizas arbusculares vesiculares
Encalado
Aplicación de abonos
Colombia
Forage Book chapters CIAT Editor Forrajes Capítulos de libros Fisiología de la planta - Nutrición Plant physiology - Nutrition Book chapters
SB 117 .M5
Nutritional requirements of Brachiaria and adaptation to acid soils - p. 53-71
Most commercial Brachiaria species are adapted to low-fertility acid soils of the tropics. We describe, with examples, some of the attributes that enable them to adapt. These include the ability to (1) maintain root growth at the expense of shoot growth; (2) acquire and use both nitrate and ammonium forms of N; (3) acquire N through associative fixation; (4) acquire p through extensive root systems and association with vesicular-arbuscular mycorrhizae; and (5) acquire Ca through extensively branched roots with large numbers of root tips. Although Brachiaria species have much lower internal requirements, especially of p and Ca, than do other grasses such as Panicum maximum, they show interspecific differences, which we describe. We also developed a system to diagnose mineral nutrient disorders by visual symptoms in B. decumbens cv. Basilisk, and describe our results. We offer a list of priorities for further research.
Brachiaria
Plant nutrition
Acid soils
Productivity
Nutrient uptake
Nitrogen fixation
Nitrogen
Phosphorus
Vesicular arbuscular mycorrhizae
Liming
Fertilizer application
Colombia
Brachiaria
Nutrición de las plantas
Suelo ácido
Productividad
Absorción de sustancias nutritivas
Fijación del nitrógeno
Nitrógeno
Fósforo
Micorrizas arbusculares vesiculares
Encalado
Aplicación de abonos
Colombia
Forage Book chapters CIAT Editor Forrajes Capítulos de libros Fisiología de la planta - Nutrición Plant physiology - Nutrition Book chapters
SB 117 .M5