The research was carried out aiming to verify the effect of rock powder and bovine manure as natural sources for fertilization and nutrition of the pepper culture (Capsicum annuum L. cv. All Big). The experiment was carried out in the seedling nursery of the Federal Institute of Education Science and Technology of Paraíba - IFPB, Campus Sousa, São Gonçalo Unit during the period from September 2014 to August 2015. The experimental design used was in randomized blocks (DBC ) with 10 treatments and 4 repetitions, totaling 40 experimental units. The treatments were as follows: T1 = control (soil), T2 = soil + manure + rock powder (1: 1: 1); T3 = Soil + Dung + Rock Dust (2: 1: 1); T4 = Soil + Dung + Rock Dust (2: 2: 1); T5 = Soil + Dung + Rock Dust (2: 2: 2); T6 = Soil + Dung + Rock Dust (3: 1: 1); T7 = Soil + Dung + Rock Dust (3: 2: 1); T8 = Soil + Dung + Rock Dust (3: 2: 2); T9 = Soil + Dung + Rock Dust (3: 3: 2); and T10 = Soil + Dung + Rock Dust (3: 3: 3). Plant height, fresh shoot weight, fresh root weight, dry shoot weight, dry root weight, fruit length, fruit diameter, fresh fruit weight, dry fruit weight, total production and commercial production. The treatments tested significantly influenced the variables: dry and fresh root material, fresh and dry aerial part, fruit length (second harvest) and dry fruit mass (second harvest). The association of rock powder with bovine manure, natural by-products, rich in nutrients essential to the development and production of plants, presents itself as a potential alternative for use in agriculture. The T8 treatment provided greater commercial production with fruits in the commercial standard.
The use of seeds with good sanitary and physiological potential ensures the establishment of the crop, with a uniform, vigorous and disease-free seedling stand, which will result in good productivity levels. Seen that, the objective was to evaluate the sanitary and physiological quality of purple corn seeds (Zea mays L.) submitted to thermotherapy. They were subjected to heat treatment with immersion in sterile distilled water (SDW) heated at 50, 60 and 70 °C for 1, 2, and 3 minutes. The control (0 min) correspondens only to immersing the seeds in SDW, which were submitted to sanitary and germination tests in a completely randomized experimental design, in a factorial arrangement 3 × 3 + 1 (exposure time × temperature + additional control). Data were subjected to analysis of variance, and the means were compared with the Scott-Knott test up to 5% of probability, with the aid of the statistical program SISVAR®. Immersing Zea mays seeds in hot water at 50, 60 and 70 °C for 1, 2, and 3 minutes is efficient to prevent the increased incidence of Aspergillus sp., Penicillium sp., and Fusarium sp. The heat treatment at 60 °C for 1 and 2 minutes of immersion reduces the incidence of fungal mycoflora without impairing the physiological quality of seeds.
<p>A pesquisa envolvendo o modo de aplicação de adubos orgânicos e a produtividade de culturas agrícolas, em particular a do milho na região semiárida nordestina, ainda são incipientes. Nessa perspectiva esse trabalho foi realizado com o objetivo de avaliar o desempenho das variedades de milho crioulo utilizando-se de adubação de fundação orgânica. O experimento foi conduzido no Setor de Fruticultura e no Laboratório de Biologia do Instituto Federal de Educação, Ciência e Tecnologia da Paraíba, (Campus Sousa), ambos localizados no Perímetro Irrigado de São Gonçalo, durante o período de abril a julho de 2012. O experimento foi implantado com o delineamento em blocos casualizados, com 3 repetições e 4 tratamentos sendo: T1 testemunha, T2 esterco bovino, T3 esterco ovino e T4 húmus, foram plantadas 24 plantas por linha, totalizando 96 plantas por parcela experimental. As características avaliadas foram: altura do plantio (cm), relação entre altura da espiga e altura da planta, índice de espigas, produtividade (t ha-1), Reação á ataques de Pragas e Doenças, Comprimento de espiga (cm), Diâmetro da espiga(cm). Não se obteve diferença estatística pra os resultados de altura da planta, altura de inserção da primeira espiga e número de espigas viáveis. A fonte com esterco ovino expressou melhor resultado com 31,9 (t/ha<sup>-1</sup>) para a espiga sem palha.</p>
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