Regina Lúcia Félix Ferreira

Qualidade de alface crespa cultivada em sistema orgânico, convencional e hidropônico

O objetivo deste trabalho foi avaliar a qualidade da alface do grupo crespa, cv. Vera, em sistemas de cultivo orgânico, convencional e hidroponico em Rio Branco-AC. O experimento foi conduzido em julho de 2009. As amostras dos sistemas, convencional e hidroponico (3 marcas comerciais), foram escolhidas aleatoriamente nos supermercados do municipio de Rio Branco, no mesmo dia de coleta da alface produzida em sistema orgânico. A alface orgânica, produzida na area experimental do Setor de Agricultura Ecologica da Universidade Federal do Acre (UFAC), em Rio Branco, foi cultivada em estufa, sob plantio direto utilizando folhas de bambu como cobertura do solo, e adubada com composto orgânico (17 t ha-1 em base seca). O delineamento utilizado foi o inteiramente casualizado, com cinco tratamentos e quatro repeticoes compostas por tres plantas. As amostras foram lavadas, cortadas e processadas com folha e caule, para obter o suco. Logo apos foram determinados os teores de solidos soluveis e a concentracao de nitrato e acido ascorbico. As tres marcas de alface hidroponica apresentaram maior teor de nitrato e menor concentracao de solidos soluveis e acidos ascorbico, enquanto a alface orgânica apresentou qualidade superior, com baixa concentracao de nitrato e maior teor de acido ascorbico.

DESENVOLVIMENTO DE MUDAS DE MARACUJAZEIRO-AMARELO OBTIDAS DE SEMENTES EXTRAÍDAS POR FERMENTAÇÃO

With the objective of evaluating the effect of fermentation on obtainment in yellow passion fruit seeds on the plantlets emergency and development seedling, a research was carried in greenhouse in the Fitotecnia Department, ESAM, in Mossoro-RN-Brazil. The experimental design was a randomized complete block with seven treatments and four replications. Evaluations were performed emergency percentage, days number to reach emergency 50%, height plantlets, stem diameter, leaf number, length pivotant root, dry weight of part aereal and root. The development of seedling was not influenced by fermentation extract seeds. The fermentation of the flash fruit during 3 to 6 days promoted lager vigour and plantlets emergency at smaller time that unfermentation extract seeds.

Cultivo orgânico de coentro em plantio direto utilizando cobertura viva e morta adubado com composto

The objective of this work was to evaluate the agronomic behavior of the cilantro in organic no-tillage system under alive and dead mulching and fertilized with doses of compost. The experimental design was randomized blocks, in a split-plot arrangement with four replications. The plot corresponded to the planting system (no-tillage with live mulching of Arachis pintoi, with live mulching of native weed, with mulching of straw and conventional tillage). In each plot the split- plot were represented by the doses of organic compost 10; 20 e 30 t ha -1 of dry compost. The no-tillage system with straw and conventional tillage showed the best results in all variables in the plant compared with no-tillage systems with live mulching of peanut crop and native weed. Cilantro answered linearly to fertilization, with yields of 4,554 t ha -1 to 6,542 t ha -1 wh en fertilized with 10 to 30 t ha -1 , respectively.

Produtividade e qualidade de genótipos de melão-amarelo em quatro ambientes

With the objective of identify genotypes of yellow melon export type and with high yield, were evaluated nine genotypes in four environments in Potiguar West. The experiments were established in the Mossoro-Assu Agricultural Pole, Rio Grande do Norte State - Brazil. The experimental design was in randomized blocks with four replications and 16 plants for plot. The genotypes evaluated were: Rochedo, TSX-32096; PX 4910606, Gold Mine, PX-1010606; Yellow Queen; Gold Pride; Yellow King; AF-646 and AF-682. The genotypes that presented higher total productivity were TSX-32096, Gold Mine, PX-4010606, Yellow Queen and Gold Pride, with average of 55.1 t/ha, and with higher marketable productivity were TSX-32096, Rochedo, Gold Mine, PX-4010606 and Gold Pride in Mossoro (40.1 t/ha) and Carnaubais (46.2 t/ha), and the genotypes AF-646, Yellow Queen and AF-682 in Barauna (63.1 t/ha), this environment provided the largest marketable productivity, overcoming in 53%, 75% and 166% the environments of Carnaubais, Mossoro and Alto do Rodrigues. The fruit mean weight was influenced by the cultivation environment, ranging from 1.07 kg in Mossoro to 1.64 kg in Barauna. The higher concentration of soluble solids was verified in the genotypes AF-646 (11.1%), PX-4910606 (11.0%), Yellow King (10.7%) and TSX-32096 (11.3%).

Rentabilidade econômica do maracujazeiro-amarelo plantado em covas e em plantions direto sob manejo orgânico

The objective of this research was to evaluate the economical profitability of the yellow passion fruit tree planted in hole and no-tillage under organic cultivation in the state of Acre, Brazil. It was evaluated five types of preparation of the soil: T1- No tillage with a hole of the size of a clod (0.19 m x 0.063 m) with covering; T2- hole of 0.30 m x 0.30 m x 0.30 m with fertilization in the hole of planting; T3- similar to T2 but with fertilization of coverage; T4- hole of 0.50 m x 0.50 m x 0.50 m with fertilization in the hole of planting; and T5- similar to T4 but with fertilization of coverage. The economical and operational costs medium were larger for the no-tillage and the planting systems in holes of 0.50 m, they present an elevated total cost of production and smaller yield. The liquid revenue was larger in the planting systems with holes of 0.30 m with fertilization in the hole (R

CULTIVO ORGÂNICO DE RÚCULA EM PLANTIO DIRETO SOB DIFERENTES TIPOS DE COBERTURAS E DOSES DE COMPOSTO

10,234.19/ha) and of coverage (R

PRODUÇÃO ORGÂNICA DE MUDAS DE COUVE-MANTEIGA EM SUBSTRATOS À BASE DE COPROLITO DE MINHOCAS

11,501.44/ha) and in the no-tillage system (R

RENDIMENTO E QUALIDADE DE MELÃO EM DIFERENTES COBERTURAS DE SOLO E MÉTODOS DE PLANTIO

8,925.08/ha). In all of the treatments, the economical situation was of supernormal profit, so the tendency is of more farmers to enter in the market.