Vilela G.F.,São Paulo State University |
Ming L.C.,São Paulo State University |
da Silva S.M.P.,APTA SAA |
Montanari Junior I.,University of Campinas
Horticultura Brasileira | Year: 2013
The medicinal species fafia (Hebanthe eriantha), is a product of extractivism in the region of the Paraiba Valley, São Paulo state, Brazil, with endangered genetic variability. This study did an agronomical characterization and an analysis of active compounds of five accessions. This research is a partnership of UNESP-Botucatu Medicinal Plants Laboratory, Paraiba Valley Center (APTA) and CPQBA-UNICAMP Agrotechnological Division. A field experiment using completely random blocks with five accessions and seven replications was used. The stem and leaf wet/dry weights, root wet/dry weight, length of the longest stem, foliar area, foam index and pfaffic acid content samples were evaluated. Accession I1800 had root dry weight, stem and leaf dry weight, and foliar area greater than other accessions (176.16 g/plant, 7.301 kg/plant, 155.04 cm2). Pfaffic acid content was similar to other accessions (0.640-0.366 %mm-1) Among all five accessions, there is a positive correlation among the foliar area and stem and leaf dry weight and between the foliar area and root dry weight.
Nitrogen and potassium fertilization effects on a sorghum hybrid: Structural and yield traits [Respostas do híbrido de sorgo-sudão às adubações nitrogenada e potássica: Características estruturais e produtivas]
Simili F.F.,APTA SAA |
de Miranda Gomide C.A.,EMBRAPA - Empresa Brasileira de Pesquisa Agropecuária |
Moreira A.L.,APTA SAA |
Reis R.A.,São Paulo State University |
And 2 more authors.
Ciencia e Agrotecnologia | Year: 2010
This research was carried out in the Forage Section of FCAV/UNESP-Jaboticabal, to evaluate hybrid sorghum AG 2501C (Sorghum bicolor x Sorghum sudanense) during autumn/winter. Pasture management was accomplished by a simulation of intermittent stocking. The experiment was developed from March to September of 2002. The forage was submitted to nine treatments: three doses of N (100, 200, and 300 kg/ha) and three doses of K (0, 80, and 160 kg/ha of K2O) in a randomized block design with three replications in a split plot scheme. Characteristics including forage mass before grazing (FMBG), after grazing (residual), leaf and stem, leaf/stem ratio, leaf area index (LAI), interception of light, and light extinction coefficient (LEC) were evaluated. No differences for FMBG, residual, leaf, and stem were found. The averages were 2801.2, 964.7, 1462.8, and 1085.2 kg/ha of DM, per grazing cycle for FMBG, residual, leaf, and stem. There was significant interaction (p<0,01) between N and K for LAI, interception of light, and LEC.
Zuin R.G.,São Paulo State University |
Buzanskas M.E.,São Paulo State University |
Caetano S.L.,São Paulo State University |
Venturini G.C.,São Paulo State University |
And 7 more authors.
Meat Science | Year: 2012
In this study, the objective was to estimate genetic parameters of body weight at 210 (BW210) and 365 (BW365) days of age in relation to rib eye area (REA), subcutaneous back fat thickness (BF) and rump fat (RF), and their respective genetic trends, in Nelore beef cattle. Estimates of genetic parameters and breeding values for the studied traits were obtained using the REML method. The direct and maternal heritability estimates were respectively: 0.25 ± 0.02 and 0.21 ± 0.01, for BW210, and 0.29 ± 0.02 and 0.09 ± 0.01, for BW365. The heritability estimates for transformed REA, BF and RF were 0.29 ± 0.03, 0.21 ± 0.02 and 0.23 ± 0.03, respectively. There were genetic associations between BW210 and REA, BW365 and REA, and BF and RF, while the other correlations were low. The selection process that was conducted at the farms participating in the breeding program, taking the proposed selection index into consideration, caused genetic changes to these traits. © 2012 Elsevier Ltd.