CALAGEM E ADUBA\uc7\uc3O FOSFATADA NO CRESCIMENTO DE MUDAS DE Mimosa caesalpiniifolia Benth. EM LATOSSOLO VERMELHO-AMARELO

This work aimed to evaluate the effects of liming and phosphate fertilizer for the production of sabi\ue1 ( Mimosa caesalpiniifolia Benth.) seedlings without thorns under a greenhouse. Seedlings 10 days old were transferred to plastic bags containing 2.0 kg of psamitic Dystrophic Red-Yellow Latosol (Typic Haplustox) collected from 40 to 70 cm layer. The experiment was carried out in Teresina county, Piau\ued state, Brazil, from July to October of 2008. Two liming doses (with and without liming) and five phosphorus doses combined in a 2 x 5 factorial scheme were used. The experimental design used was the randomized blocks with four replications having each plot three seedlings. The calculated lime amount was enough to elevate the base saturation to 50 % and the phosphorus doses were: 0, 30, 60, 90, and 120 mg kg-1 of soil. One seedling per pot was cultivated and the pot dimension was 10 by 23 cm. The evaluated variables were height, diameter, leaves number, leaf area, and shoot and roots dry matter. For the studied soil condition, the liming is not necessary to produce 'Sabi\ue1' seedlings. The application, on average, from 72 to 107 mg kg-1 of P promote, respectively, from 90 to100 % of maximum values of height, diameter, leaf area and shoots and roots biomass.O presente trabalho teve por objetivo avaliar os efeitos da adi\ue7\ue3o de calc\ue1rio e adubo fosfatado na produ\ue7\ue3o de mudas de sabi\ue1 ( Mimosa caesalpiniifolia Benth.) sem ac\ufaleos, em ambiente protegido. Pl\ue2ntulas com 10 dias de idade foram transferidas para sacos de pl\ue1stico contendo 2,0 kg de Latossolo Vermelho-Amarelo distr\uf3fico psam\uedtico, coletado na camada de 40 a 70 cm. O experimento foi conduzido no munic\uedpio de Teresina \u2013 PI, no per\uedodo de julho a outubro de 2008, em ambiente protegido por tela com 50 % de reten\ue7\ue3o de luz. Foram usadas duas doses de calc\ue1rio (com e sem calc\ue1rio) e cinco doses de f\uf3sforo, combinadas em esquema fatorial 2 x 5. O delineamento experimental foi em blocos ao acaso com quatro repeti\ue7\uf5es e cada parcela continha tr\ueas mudas. A quantidade de calc\ue1rio foi calculada para elevar a satura\ue7\ue3o por bases a 50 % com o uso de calc\ue1rio e as doses de f\uf3sforo foram 0, 30, 60, 90 e 120 mg kg-1 de P. Foi cultivada uma muda por saco de pl\ue1stico, com as dimens\uf5es de 10 x 23 cm. As vari\ue1veis avaliadas nas mudas foram: altura, di\ue2metro a 1,0 cm do coleto, \ue1rea foliar, n\ufamero de folhas e mat\ue9ria seca da parte a\ue9rea e ra\uedzes. Nas condi\ue7\uf5es do solo estudado, a calagem n\ue3o \ue9 necess\ue1ria para produ\ue7\ue3o de mudas de sabi\ue1. A aplica\ue7\ue3o de, em m\ue9dia, 72 a 107 mg kg-1 de P obt\ue9m-se, respectivamente, de 90 a 100 % dos m\ue1ximos rendimentos de altura, di\ue2metro, \ue1rea foliar, biomassa da parte a\ue9rea e ra\uedze

CALAGEM E ADUBA\uc7\uc3O FOSFATADA NO CRESCIMENTO DE MUDAS DE Mimosa caesalpiniifolia Benth. EM LATOSSOLO VERMELHO-AMARELO

This work aimed to evaluate the effects of liming and phosphate fertilizer for the production of sabi\ue1 ( Mimosa caesalpiniifolia Benth.) seedlings without thorns under a greenhouse. Seedlings 10 days old were transferred to plastic bags containing 2.0 kg of psamitic Dystrophic Red-Yellow Latosol (Typic Haplustox) collected from 40 to 70 cm layer. The experiment was carried out in Teresina county, Piau\ued state, Brazil, from July to October of 2008. Two liming doses (with and without liming) and five phosphorus doses combined in a 2 x 5 factorial scheme were used. The experimental design used was the randomized blocks with four replications having each plot three seedlings. The calculated lime amount was enough to elevate the base saturation to 50 % and the phosphorus doses were: 0, 30, 60, 90, and 120 mg kg-1 of soil. One seedling per pot was cultivated and the pot dimension was 10 by 23 cm. The evaluated variables were height, diameter, leaves number, leaf area, and shoot and roots dry matter. For the studied soil condition, the liming is not necessary to produce 'Sabi\ue1' seedlings. The application, on average, from 72 to 107 mg kg-1 of P promote, respectively, from 90 to100 % of maximum values of height, diameter, leaf area and shoots and roots biomass.O presente trabalho teve por objetivo avaliar os efeitos da adi\ue7\ue3o de calc\ue1rio e adubo fosfatado na produ\ue7\ue3o de mudas de sabi\ue1 ( Mimosa caesalpiniifolia Benth.) sem ac\ufaleos, em ambiente protegido. Pl\ue2ntulas com 10 dias de idade foram transferidas para sacos de pl\ue1stico contendo 2,0 kg de Latossolo Vermelho-Amarelo distr\uf3fico psam\uedtico, coletado na camada de 40 a 70 cm. O experimento foi conduzido no munic\uedpio de Teresina - PI, no per\uedodo de julho a outubro de 2008, em ambiente protegido por tela com 50 % de reten\ue7\ue3o de luz. Foram usadas duas doses de calc\ue1rio (com e sem calc\ue1rio) e cinco doses de f\uf3sforo, combinadas em esquema fatorial 2 x 5. O delineamento experimental foi em blocos ao acaso com quatro repeti\ue7\uf5es e cada parcela continha tr\ueas mudas. A quantidade de calc\ue1rio foi calculada para elevar a satura\ue7\ue3o por bases a 50 % com o uso de calc\ue1rio e as doses de f\uf3sforo foram 0, 30, 60, 90 e 120 mg kg-1 de P. Foi cultivada uma muda por saco de pl\ue1stico, com as dimens\uf5es de 10 x 23 cm. As vari\ue1veis avaliadas nas mudas foram: altura, di\ue2metro a 1,0 cm do coleto, \ue1rea foliar, n\ufamero de folhas e mat\ue9ria seca da parte a\ue9rea e ra\uedzes. Nas condi\ue7\uf5es do solo estudado, a calagem n\ue3o \ue9 necess\ue1ria para produ\ue7\ue3o de mudas de sabi\ue1. A aplica\ue7\ue3o de, em m\ue9dia, 72 a 107 mg kg-1 de P obt\ue9m-se, respectivamente, de 90 a 100 % dos m\ue1ximos rendimentos de altura, di\ue2metro, \ue1rea foliar, biomassa da parte a\ue9rea e ra\uedzes