Time filter

Source Type

Crato, Brazil

Santos R.C.,Embrapa Algodao | Da Luz L.N.,UFCA | Pinheiro M.P.N.,Federal Rural University of Pernambuco | Galvao Filho A.L.A.,Embrapa Algodao | De Lima L.M.,Embrapa Algodao
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2014

The interrelations between biochemical and agronomic descriptors were investigated in peanut genotypes in order to identify selection indicators for tolerance to stored grain pests, based on the inhibitory capacity for trypsin and chymotrypsin. Ten genotypes were grown in field, in 2011/2012, and their seeds were further used for biochemical assays. Four agronomic traits were used in order to compose the correlation analysis. Seven genotypes showed high inhibitory capacity for trypsin with more than 80% inhibition; however, chymotrypsin inhibition was low in all genotypes, varying between 4 and 12%. No significant interrelationships between inhibitors and the other variables were seen in correlation analysis, except trypsin inhibitor x leaves protein, which revealed a negative correlation with high magnitude, indicating that a high protein content in the leaves can reduce the level of trypsin inhibitor in the seeds. This descriptor could be used as a selection indicator for tolerance to stored grain pests, adding the benefit of saving the seed. Source

De Alencar F.H.H.,IFCE | Da Silva D.S.,PDIZ CCA UFPB | De Andrade A.P.,PDIZ CCA UFPB | Feitosa J.V.,UFCA
Revista Caatinga | Year: 2015

The objective of this Study was to evaluate the effect of organic fertilizer and cuts on the chemical composition and in vitro digestibility of the air pornunça biomass. The experimental design of randomized blocks in a split plot with four courts, two fertilization, and four replications. The cuts were made in February, June and October 2011 and February 2012. The fertilizer was with cattle and sheep manure, applied in May 2010 and March 2011 in the amount of 20 Mg ha-1. We evaluated the structural components of the shoot, such as leaf blade, petiole, branch and full (leaf blade and petiole more branch) of pornunça. The manure beef and lamb did not influence (P>0.05) the chemical composition of the structural components of the shoot. Differ-ences were noted between the cuts, except for dry matter (DM) of the leaf blade and the full component of ether extract (EE), neutral detergent fiber (NDF), acid detergent fiber (ADF) and hemicellulose (HC). There was a significant (P<0.05) for the in vitro digestibility of the MS of the structural components in different cuts, with the highest digestibility for structural components in the cut made in February 2011. Lower crude protein was found in the petiole and components branch. The pornunça should be considered as an alternative food for ani-mals according to the chemical composition of the values presented in this study, with the leaf surface of the plant part that presents the best nutritional value. © 2015, Universidade Federal Rural do Semi-Arid. All rights reserved. Source

Sobrinho V.F.,UFCA | Rodrigues J.O.,UFCA | Mendonca L.A.R.,UFCA | de Andrade E.M.,Federal University of Ceara | Tavares P.R.L.,UFCA
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2014

The isozones rain disaggregation methodology was validated and used in this study for the development of IDF (Intensity-Duration-Frequency) equations for three municipalities in the Cariri Metropolitan Region - Ceará, devoid of recording rain gauges. For the validation, data from stations located in different climate regions of the Cariri Metropolitan Region, and from one station in the same climate region was used. To develop the IDF equations, annual daily maximum rainfall data were used, which were adjusted and tested according to Gumbel, Log-Normal II-P, Log-Normal III-P, Gama II-P e Gama III-P probability distributions. The rainfall intensity estimated by the isozones method presented high Willmott indexes, when compared to the amount estimated by the respective IDF equations. The maximum annual daily rainfall used in the application of the isozones method, adjusted respectively to the Gamma III, Normal-Log II and Gamma II. However, it was verified that other functions may be used without significant loss to the precision of the estimates. These results indicate the viability of using this method as an alternative to elaborate IDF equations for regions not monitored and without records of rainfall. Source

Discover hidden collaborations