This work aimed to evaluate the development of seedlings by cuttings Brazilian peppertree cuttings submitted to different treatments and substrates. For that we used a randomized experimental design in a 2x4 factorial scheme, consisting of the use (3.000 mg.L-1)) or not of IBA associated with different types of substrate: vermiculite (V); carbonized rice husk with vermicompost (CV); carbonized rice husk with vermicompost and sand (CVS); Turfa Fértil® commercial substrate (CS), in four replicates per treatment, each consisting of 10 cuttings. After 90 days, the following variables were evaluated: percentage of rooted cuttings, length of the largest root, number of leaves over 1 cm in length, and dry root weight. The Generalized Linear Model (GLM) was used with p ‹ 0.05 of significance in the data analysis. The use of IBA in rooting Brazilian peppertree cuttings is recommended. CVS is the substrate with the best interactions, and substrates like CS should be avoided.
Peach is a traditional crop in the south of Rio Grande do Sul State, Brazil, where 30 to 53 million cans of peaches in syrup are produced annually. All the raw material produced in the region consists of fruits originating from the peach breeding program of the Brazilian Agricultural Research Corporation (Embrapa Temperate Agriculture), which started even before Embrapa at the Experimental Station of Pelotas, Ministry of Agriculture. The objective was to estimate the genetic progress in phenological traits and production of canning peach resulting from the peach breeding program of Embrapa Temperate Agriculture in 53 years. We divided the data records considered in the estimation of genetic progress into two periods, 1964-1984 and 1985-2017, totaling 53 years. The following traits: maturing period, cycle, number of fruits, fruit weight, yield, and soluble solids content were evaluated. We initially tabulated data and analyzed descriptive statistics. Subsequently, we conducted analysis of mixed models and obtained the estimates of genetic progress through meta-analysis. Genetic gain for earliness, shortening the cycle from flowering to maturation, and genetic gain for fruit yield were observed.
O objetivo da pesquisa foi avaliar a influência do uso de hidrogel e mulching de cobertura morta sobre a sobrevivência e crescimento de mudas de Rhododendron simsii, Schinus spp. (S. terebinthifolia e S. molle) e Cupressus lusitanica. Para isso foram instalados três blocos, contendo quatro tratamentos inteiramente casualizados: T1: Tratamento controle (irrigação tradicional, sem mulching); T2: aplicação de hidrogel e sem mulching, T3: aplicação de hidrogel e com mulching e T4: irrigação tradicional e com mulching. A sobrevivência foi próxima a 100% para todas as espécies e tratamentos. Não houve efeito dos tratamentos sobre as variáveis avaliadas para R. simsii. Para Schinus spp., o tratamento T3 resultou em incremento em diâmetro da base significativamente superior do que T4 (TCRd; F = 3,13; p = 0,03). Para C. lusitanica, todas as variáveis avaliadas tiveram 3,50= 66,5; p ≤ 0,01; altura total (cm): F = 5,69; p ≤ 0,01; TCRd: F = 5,14; p ≤ 0,01; TCRh: F seu custo de implantação e manutenção é inferior ao sistema de irrigação por gotejamento e todas as espécies avaliadas apresentaram crescimento em altura e diâmetro igual ou superior à irrigação convencional.
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