Resumo

PENTON, Gertrudis; OROPESA, Katherine  e  PENALVER, P.L. Multiplication of AMF infective propagules in a mulberry (Morus alba L.) plantation. Pastos y Forrajes [online]. 2013, vol.36, n.1, pp. 22-27. ISSN 0864-0394.

A field essay was conducted at the Experimental Station of Pastures and Forages «Indio Hatuey», on a Ferralitic Red soil of good surface and internal drainage in order to evaluate the effect of mineral fertilization and intercropping of Canavalia ensiformis (jack-bean), inoculated with AMF, on the multiplication of infective propagules in a mulberry (Morus alba L.) plantation. The mulberry planting frame was 1,0 by 0,50 m (20 000 plants/ha). The plantation area was 384 m2,, with 40 plants in the plots. The forage was harvested with a 90-day interval at a height of 30 cm. The evaluated treatments were: control (without fertilization and without intercropping of jack-bean, WFWJBAMF); AMF incorporation through the intercropping of jack-bean, without mineral fertilization (WFJBAMF); mineral fertilization (F) and AMF incorporation through intercropping of jack -bean, with mineral fertilization (FJBAMF). The jack-bean was planted inoculated with AMF at a distance of 0,5 m from mulberry, in the first 15 days of growth of this plant since cutting, at the beginning of each season. The design was randomized blocks with factorial arrangement and three repetitions. Low content of native infective propagules was evidenced in the rhizosphere of the mulberry plantation (190-295 spores/50 g). The effect of FJBAMF was highly significant on the multiplication of infective propagules during the rainy season and during the first 45 days of the dry season (370 and 469 spores/50 g, respectively), while it contributed to increase the organic matter and K contents of the soil. It is concluded that the combination of mineral fertilization with AMF incorporation through the intercropping of jack-bean constitutes an effective procedure to multiply the AMF infective propagules up to moderate levels.

Palavras-chave : Canavalia ensiformis; inoculation; Morus alba; propagules.

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