Navegando por Assunto "Semeadura"

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Comportamento da soja BRS 7780 IPRO (Glycine max L. MERRIL) no município de Serra Talhada - PE em diferentes densidades de semeadura
(2019-07-17) Nascimento, Simone Andrea dos Santos; Almeida, Rosa Honorato de; http://lattes.cnpq.br/4319299572657528; http://lattes.cnpq.br/3647378652257643
Soy, being a very important oilseed for the production of oils and bran, becomes an alternative for the composition of human and animal food, since it has gained great expressiveness in Brazil over the years. Due to the scarcity of studies on soybeans in some Northeastern states and the adequate production arrangements for the crop, it is of great importance to develop research on seeding density, a determining factor in the production environment influencing the growth and development of soybeans, with the objective of evaluating the behavior of the BRS 7780 IPRO soybean variety in different plant densities (333, 416 and 476 thousand plants ha1), in semi-arid conditions, in the municipality of Serra Talhada. The study was developed in the period from March to June 2019, at the Universidade Federal Rural de Pernambuco, Unidade Acadêmica de Serra Talhada. The experimental design used was that of randomized blocks, with three treatments representing planting densities of 333 thousand, 416 thousand and 476 thousand ha-1 plants, with eight repetitions. Plant height and first pod insertion, number of pods and grains per plant, number of branches, wet and dry weight of pods, mass of 1000 grains and estimated grain productivity were evaluated. It was concluded that the height of the plants and the insertion of the first pod are higher with the increase of the seeding density, however, it promoted a greater reduction in the number of branches per plant, number of pods and grains per plant. For the cultivar studied, sowing density extremes did not promote considerable variations in productivity and the weight of 1000 grains. The BRS 7780 IPRO soybean cultivar presented a first pod insertion height close to that adequate for mechanized harvesting
Efeitos do tamanho de vagens na germinação e vigor de sementes de pau ferro (Caesalpinia ferrea Mart.)
(2018-02-22) Silva, Júlio César de Almeida; Gonçalves, Edilma Pereira; Ferreira, Débora Teresa da Rocha Gomes; http://lattes.cnpq.br/1123517464184162; http://lattes.cnpq.br/2026865787481365; http://lattes.cnpq.br/5083282435990912
The Caesalpinia ferrea Mart, known as jucá or pau-ferro, is used in folk medicine for its therapeutic properties in the treatment of wounds, bruises, asthma, and chronic cough. In recent years, there has been a great advance in the field of study on seed analysis of native species. However, it is still incipient for several forest species, mainly regarding the basic characteristics of the seeds, the light effect and the depth in the germination process. The experiments were carried out in the Laboratory of Seed Analysis at the Federal Rural University of Pernambuco - Academic Unity of Garanhuns (UFRPE - UAG), in order to verify the influence of the different sizes of fruits on the germination, vigor and sowing depth of Caesalpinia ferrea. The fruits were harvested in the municipality of Paranatama - PE and classified into two lots: batch 1 (Large fruits) and batch 2 (Small fruits). After the harvest, fruit and seed biometry, water content, thousand seed weight, electrical conductivity, ethereal extract, germination and light test, and depth test were performed. For the germination and luminosity test, 200 seeds were used, consisting of four replicates of 50 seeds for each batch in the presence and absence of light, in which were determined the percentage of germination, the length of the shoot and root of seedlings, and the total dry mass of normal seedlings. For the depth test, the experiment was consisted of 4 treatments (0.0, 2.0, 4.0 and 6.0 cm) with 4 replicates of 10 seeds for each batch. The differences verified for the biometry of fruits and seeds have as main cause the genetic variability of the matrices. Seeds behaved as neutral photoblastic for the two lots under study, with interactions between seed size and germination speed index, and root length and total dry mass. The best seeding depth for seeds from large fruits was 3.52 cm, and 3.61 cm for small fruits.