Efeito do fósforo e da densidade de população sobre os componentes do rendimento do feijão-de corda (vigna unguicu/ata l. walp). 1. características morfológicas
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1988-12
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Wilson Ferreira de Oliveira
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A field experimcnt was carried out on a distrophic Red Yellow latosol Text, in the state of Bahia, Brazil, to evaluate the effects of populalion densities and leveis of phosphorus dressing on some morphological characterislics of cow-pea (Vigna unguiculata L Walp), Cv "Tv x 1836-0131", with a determinate growing hahit. Population densities of 40, 80, 160 and 320 thousands of plants per hectare and phosphorus leveis at O, 40, 80 and 160 kg
P 20 5 per hectare were applied.
Early and late flowering measurements were taken for number of knots on stems and sprouts, foliar area, foliar area index and dry matter production per plant. At harvest data, were taken for number of knots on stems and sprouts.
From the observations made at early flowering, only foliar index was affected by plant density. An incremente of about 531 % was observed on foliar area index by increasing plant density from 40.000 to 320.000 plants per hectare.
Data collected at late flowering showed a significant effect of plant density on the number of knots per sprount, total number of knots per plant and foliar area, that diminished with increasing plant density. Phosphorus leveis had a significant and positive effect on those variables. However, increasing plant density caused a significant reduction on total dry matter yield per plant and a significant increase on foliar index.
At harvest, a significant and negative effect of plant density was observed on the number of stem knots, number of sprout knots and total number of knots per plant, with increasing plant densities for 40.000 to 320.000 plants per hectare.
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MATTEUCCI, Magda Beatriz de Almeida; CARVALHO, Benedito Carlos Lemos de. Efeito do fósforo e da densidade de população sobre os componentes do rendimento do feijão-de corda (vigna unguicu/ata l. walp). 1. características morfológicas. Anais da Escola de Agronomia e Veterinária, Goiânia, v. 18, n. 1, p. 73-87, jan./dez. 1988. Disponível em: <https://www.revistas.ufg.br/pat/article/view/2552/2524>.