Publication Date

1989

Description

For legume forage plant contribute effectively to grassland improvement, mainly through high herbage yields and fixation of atmospheric N, it is necessary to have a better knowledge of its nutritional requirements, since pigeonpea does not grow well on acidic soils with high levels of Al and poor in Ca, Mg and P. Ogunwale and Olaniyi (1978) reported a significant increase on forage production and P and Ca uptake for pigeonpea as a result of phosphate fertilization, while Abrufi.a et al., (1984) observed that lime improved growth, nodulation and P and Ca uptake, but with little effect on crude protein con­tent. Although some forage legumes can nodulate with native Rhizobium, adapted to low concentrations of calcium and phosphorus, they do require minimum levels of these nutrients in a soil so that an efficient nodulation and optimum plant development may occur (Munns & Masse, 1980). Calcium plays an important role in the process of root infection by the Rhizobium, while phosphorus participates in several mechan­isms of energy storage and transfer being indispensable in the reduction process of N2 to NH4 (Vidor et al., 1983). The purpose of this work was to evaluate the effects of liming and phosphate fertilization on dry matter yield, nodulation and chemical composition of pigeon pea.

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Liming and Phosphate Fertilization on Forage Production, Mineral Composition and Nodulation on Pigeonpea (Cajanus cajan (L.) millsp.)

For legume forage plant contribute effectively to grassland improvement, mainly through high herbage yields and fixation of atmospheric N, it is necessary to have a better knowledge of its nutritional requirements, since pigeonpea does not grow well on acidic soils with high levels of Al and poor in Ca, Mg and P. Ogunwale and Olaniyi (1978) reported a significant increase on forage production and P and Ca uptake for pigeonpea as a result of phosphate fertilization, while Abrufi.a et al., (1984) observed that lime improved growth, nodulation and P and Ca uptake, but with little effect on crude protein con­tent. Although some forage legumes can nodulate with native Rhizobium, adapted to low concentrations of calcium and phosphorus, they do require minimum levels of these nutrients in a soil so that an efficient nodulation and optimum plant development may occur (Munns & Masse, 1980). Calcium plays an important role in the process of root infection by the Rhizobium, while phosphorus participates in several mechan­isms of energy storage and transfer being indispensable in the reduction process of N2 to NH4 (Vidor et al., 1983). The purpose of this work was to evaluate the effects of liming and phosphate fertilization on dry matter yield, nodulation and chemical composition of pigeon pea.