RESUMOEste trabalho foi conduzido no período de julho a novembro de 2009, na Fazenda Experimental Rafael Fernandes, da Universidade Federal Rural do Semi-Árido -UFERSA, Brasil, objetivando-se avaliar a produção da beterraba (Beta vulgaris L.) fertilizada com jitirana (Merremia aegyptia L.) sob diferentes doses e tempos de sua incorporação ao solo. O delineamento experimental adotado foi em blocos completamente casualizados e os tratamentos arranjados em esquema fatorial 4 x 4 + 1 com 3 repetições, com 72 plantas por parcela, sendo o primeiro fator constituído pelas doses de jitirana (5,4; 8,8; 12,2 e 15,6 t ha -1 em base seca), o segundo pelos tempos de sua incorporação ao solo (0, 10, 20 e 30 dias após a semeadura -DAS) e o tratamento adicional com adubação de 80 t ha -1 de esterco bovino. A cultivar de beterraba plantada foi a Early Wonder. A melhor performance produtiva da beterraba foi obtida na dose de 15,6 t ha -1 de jitirana incorporada ao solo, no tempo 0 dia. Os indicadores econômicos na dose de 15,6 t ha -1 no tempo de 0 dia foram superiores aos obtidos com o uso de 80 t ha -1 de esterco bovino. O cultivo da beterraba é viável agroeconomicamente com o uso da jitirana como adubo verde. Palavras-chave: Beta vulgaris, Merremia aegyptia, adubação verde, eficiência produtivaProduction of sugar beet fertilized with scarlet starglory at different doses and times of incorporation to soil ABSTRACT This study was conducted from July to November 2009, at Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró, RN, Brazil, to assess the production of sugar beet (Beta vulgaris L.) fertilized with scarlet starglory (Merremia aegyptia L.) at different doses and times of soil incorporation. The experimental design was a randomized complete block with treatments arranged in a 4 x 4 + 1 factorial, with three replicates and 72 plants per plot, where the first factor consisted of the doses of scarlet starglory (5.4, 8.8, 12.2 and 15. 6 t ha -1 on dry basis), the second one by the times of soil incorporation (0, 10, 20, and 30 days after sowing -DAS), and additional treatment with 80 t ha -1 of cattle manure. The sugar beet cultivar grown was Early Wonder. The best productive performance for sugar beet was obtained in the dose of 15.6 t ha -1 of scarlet starglory incorporated into the soil at time 0 day. Economic indicators in the dose of scarlet starglory of 15.6 t ha -1 at time 0 day of its incorporation into the soil were higher than those obtained with the use of 80 t ha -1 of cattle manure. The cultivation of sugar beet is agro-economically viable with the use of scarlet starglory as green manure.

Intercropping systems of cowpea with radish are beginning to be deployed in the semiarid region of Rio Grande do Norte state. The great challenge is to know whether or not there is productive efficiency in these systems when fertilized with organic matter produced by spontaneous species from the ‘Caatinga’ biome. Thus, the aim of this study was to evaluate the productive performance of cowpea-radish intercropping systems under different amounts of rooster tree biomass incorporated into the soil. The study was conducted at the experimental farm Rafael Fernandes, rural zone of Mossoró, RN, in the period from June to September 2013, in an experimental design of randomized blocks with four treatments and five replicates. The treatments consisted of the following amounts of rooster tree biomass incorporated into the soil (10, 25, 40 and 55 t ha-1 on a dry weight basis). The best productive performance of the cowpea-radish intercrop was obtained when the rooster tree biomass amount of 50.01 t ha-1 was incorporated to the soil. The use of rooster tree biomass as green manure is agronomically viable in intercropped systems of cowpea-radish.

A B S T R A C TThis study aimed to evaluate the agro-economic efficiency of agrosystems of two croppings of arugula (A) and two of lettuce (L) intercropped with carrot (C) under different biomass amounts of roostertree incorporated into the soil and population density proportions between the component crops. The experimental design was a randomized block with four replications, with the treatments arranged in a 4 × 4 factorial scheme. The first factor was made up of the amounts of roostertree biomass incorporated into the soil (10, 25, 40 and 55 t ha -1 on a dry basis) and the second factor by the population density proportions of the component crops in the polycultures (50A-50C-50L%, 40A-50C-40L%, 30A-50C-30L% and 20A-50C-20L% of the population recommended for single crops -PRSC). The agro-economic performance of arugula, carrot and lettuce in polyculture was optimized at 25 t ha -1 of roostertree incorporated into the soil. The population density proportions of arugula, carrot and lettuce of 50A-50C-50L% of the PRSC provided the best agro-economic efficiency to the polyculture.Eficiência agroeconômica de policultivos de rúcula-cenoura-alface fertilizados com flor-de-seda sob diferentes proporções de densidade populacional R E S U M O Neste trabalho objetivou-se avaliar a eficiência agroeconômica de agrossistemas provenientes de dois cultivos de rúcula e dois de alface em consórcio com cenoura em diferentes quantidades de biomassa de flor-de-seda incorporadas ao solo e proporções de densidades populacionais entre as culturas componentes. O delineamento experimental foi de blocos casualizados com quatro repetições, com os tratamentos arranjados em esquema fatorial 4 x 4. O primeiro fator foi constituído pelas quantidades de flor-de-seda (10, 25, 40 e 55 t ha -1 em base seca) e o segundo pelas proporções de densidades populacionais das culturas componentes nos policultivos (50R-50C-50A%; 40R-50C-40A%; 30R-50C-30A% e 20R-50C-20A% das populações recomendadas em cultivos solteiro -PRCS). O desempenho agroeconômico do policultivo de rúcula, cenoura e alface foi otimizado na quantidade de 25 t ha -1 de flor-de-seda incorporada ao solo. As proporções de densidades populacionais de rúcula, cenoura e alface de 50R-50C-50A% das PRCS foram as que proporcionaram ao policultivo as melhores eficiências agroeconômicas.