Fungos micorrízicos arbusculares e adubação fosfatada no crescimento inicial de seis espécies arbóreas do Cerrado

CERNE

Carneiro, Marco Aurélio Carbone³  Reis, Edésio Fialho dos³  Saggin Júnior, Orivaldo José¹  Silva, Marcelle Moreira de Souza³  Lacerda, Kenia Alves Pereira² 

[1] Embrapa Agrobiologia, Seropédica$$;Instituto Federal de Ensino de Jataí, Jataí$$;Universidade Federal de Goiás, Jataí$$

关键词: Seedlings;    revegetation;    inoculation;    symbiosis;    phosphorus.;   

DOI  :  10.1590/S0104-77602011000300012

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

This study evaluated the benefit of inoculation with arbuscular mycorrhizal fungi, Glomus clarum, for the initial growth of some native arboreal species of the Cerrado biome, namely gabiroba (Campomanesia cambessedeana), baru (Dipterix alata), jatobá (Hymenaea courbaril), ingá (Inga laurina), caroba (Jacaranda cuspidifolia) and chichá (Sterculia striata), in unsterilized soil with low (0.02 mg L^-1) and high (0.2 mg L^-1) concentrations of P in the soil solution. Experiments were conducted in a greenhouse, using 1.5 kg vases, for up to 120 days. The experimental design for each arboreal species was completely randomized, with ten replicates in a 2x2 factorial design (inoculated and noninoculated seedlings, and two levels of phosphorus (P) in the soil solution). Arboreal plants of the Cerrado biome showed increased mycorrhizal colonization from inoculation with Glomus clarum, except chichá, as this species showed a high indigenous colonization, not differing from the colonization promoted by inoculated fungi. Inoculation promoted increased growth in baru, gabiroba, ingá, caroba and chichá, increasing shoot dry matter (MSPA) and root dry matter (MSR). In caroba, this effect was synergistic with application of P to the soil. Baru and jatobá showed increased dry matter with application of P to the soil only. The mycotrophy (mycorrhizal dependence) of species and their response to inoculation and to phosphorus are discussed. In order to produce quality seedlings of caroba, gabiroba, chichá and ingá, combining inoculation with Glomus clarum and phosphate fertilization of the soil is recommended, while for jatobá and baru only the application of P to the soil is recommended.

【 授权许可】

Unknown