Com o objetivo de verificar os efeitos da aplicação do Biozyme TF® sobre as características agronômicas e componentes de produção do feijoeiro comum foi realizado um experimento na Universidade Estadual do Sudoeste da Bahia, em Vitória da Conquista. O delineamento utilizado foi o de blocos casualizados (DBC), quatro repetições e cindo tratamento, sendo uma testemunha e diferentes números de aplicações de Biozyme TF®, perfazendo a mesma dose ao final do ciclo da cultura, 300 mL p.c. ha-1, uma aplicação aos 30 dias após a emergência da cultura, duas aplicações, aos 15 DAE e 30 dias após a emergência, três aplicações, aos 15, 30 e 45 DAE e quatro aplicações, aos 15, 30, 45 e 60 dias após a aplicação. Aos 65 dias após a emergência foi determinada a altura de plantas, diâmetro do caule, índice, número de folhas, área foliar e massa seca de parte aérea e aos 83 dias após a emergência, foram avaliados o comprimento de vagem, número de vagem por planta, massa de mil sementes, número de sementes por vagem e produtividade. Os dados foram submetidos à análise de variância e ao teste de Tukey a 5%. A utilização do Biozyme TF® foi mais efetiva no incremento de massa quando aplicado na fase vegetativa e a aplicação deste bioestimulante não influencia nos componentes de produção.

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The objective of this study was to evaluate the toxicity of pre-emergent herbicides to eucalyptus plants and weed control efficiency when applied via irrigation water in crop implementation. The experiment was conducted under field conditions, using the experimental randomized block design for each herbicide, in a 5 x 2 bifactorial scheme, with four replications, considering the five evaluated herbicide doses as factors (isoxaflutole – 0; 75; 105; 135 and 165 g a.i. ha-1; flumioxazin – 0; 70; 90; 110 and 130 g a.i. ha-1; sulfentrazone – 0; 400; 600; 800 and 1000 g a.i. ha-1), besides two forms of application (directly on the plant and only on the soil). The treatments were applied manually 20 days after the seedlings were planted, using a watering can. Eucalyptus intoxication percentage, plant height, stem diameter, Falker chlorophyll index, leaf number, leaf area and shoot dry mass were evaluated. Weeds present in the useful area around the planting holes were identified and quantified to determine the plant density in the area sampled per treatment. It was found that only sulfentrazone caused plant intoxication symptoms, despite not influencing eucalyptus development. Isoxaflutole, regardless of application form, and flumioxazin, applied directly on the plants, were selective to the crop, providing at the highest doses (165 and 130 a.i. ha-1, respectively) efficient weed control and increment in initial eucalyptus growth.

O presente trabalho foi conduzido com o objetivo de avaliar e selecionar genótipos de aveia forrageira adaptados às condições edafoclimáticas de Vitória da Conquista, município localizado em região tropical de altitude no estado da Bahia. The present study was conducted with the objective of evaluating and selecting forage oat genotypes adapted to the edaphoclimatic conditions of Vitória da Conquista, municipality located in a tropical region of altitude in the state of Bahia. It was used the experimental design in randomized blocks, with three replicates and nine treatments, constituted by the genotypes São Carlos, UPF 86081, FAPA 2, FAPA 43, UPF 15, IAPAR 61, UPF 19, IPR 126, UFRGS 16. The seeding was performed manually, after plowing and soil harrowing, in May 2006. The nitrogen fertilization varied from 80 to 120 kg ha -1 of N, divided in applications at the time of planting, 20 days after planting and after each cut. In periods of low water availability was used additional irrigation via sprinkling. The first cut was performed at the beginning of rubber and the following cuts, when the plants reached height between 35 and 40 cm. Were evaluated the number of days from emergence to flowering and the number of days of emergence to maturing of the grains to determine the growth cycle of the genotypes. Throughout the essay, were evaluated the green mass production and dry mass and the bromatological composition, determining the levels of crude protein, neutral detergent fiber, acid detergent fiber and in vitro digestibility of the dry matter. The genotypes UPF 86081, UPF 19 and UFRGS 16 presented potential of use in the region, in the winter period, with higher productivity of green biomass, while the genotypes FAPA 43, FAPA 2, IPR 126, IAPAR 61, UPF 15 and São Carlos show better bromatological performance with reduced fiber content and higher dry matter digestibility.

The objective of this study was to assess yield loss of weed-infested cassava and the degree of interference of weeds on the crop productivity in response to the fertilization of NPK. The study was conducted at the Universidade Estadual do Sudoeste da Bahia, in the municipality of Vitória da Conquista, BA, with two different treatment groups that were evaluated in parcels with and without fertilizer. The treatments of the first group consisted of initial coexistence periods in which the cassava plants and weeds were put to live together: 35, 70, 105, 140 and 175 days after planting (DAP); in the second group, the cassava plants, initially, remain free from weeds during the same periods. Weeds were assessed every 35 days, from the 35 to 525 days after planting of cassava, determining the fresh mass of the identified species in the evaluated treatments with and without fertilizers. The characteristics of root yield, shoot weight, harvest index, dry mass of roots, starch content and flour production were evaluated 18 months after plantation. The predominant weeds in the experimental area were: Panicum maximum, Brachiaria plantaginea, Sida rhombifolia, Pavonia cancellata, Portulaca oleracea, Cynodon dactylon and Setaria parviflora. The interference of the weeds in the cassava yield was bigger when the crop was subjected to fertilization, in coexistence periods from the 35 days after planting; however, when cassava plants were kept in the absence or in coexistence with weeds up to 35 DAP, fertilization provided increase in crop productivity factors. The competition with weeds resulted in high losses in root yield of the cassava plant, thus, being necessary the control of the invading plants in the period between 35 and 175 DAP.