Irrigation management in pruned coffee tree crop

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Simple procedure for nutrient analysis of coffee plant with energy dispersive X-ray fluorescence spectrometry (EDXRF)

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

��caro da mancha-anular do cafeeiro: controle em fun����o da cobertura pela calda com ramais e volumes de aplica����o

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Utiliza����o de ��gua residu��ria do processo p��s-colheita do caf�� na produ����o de mudas de cafeeiro

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Rela����o solo-relevo em ��reas sob cultivo de caf�� no sudoeste de Minas Gerais

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

A����o antioxidante da ��gua cat��dica: estudos preliminares em sementes de caf��

Coffee seeds have limitations regarding to its conservation because of their sensitivity to desiccation and storage behavior. The establishment of a methodology for seed storage is difficult due to its deterioration. Deterioration can enhance the production of reactive oxygen species and cause lethal oxidative damage to plant tissues. The damage caused by harmful levels of free radicals can be softened by the action of endogenous or exogenous antioxidants. Recent research shows new antioxidative protection technologies, being cathodic protection a promising technique with relevant results in other recalcitrant species and even in other living organisms. Thus, the aim of this work was to verify the antioxidant effect of cathodic water in Coffea arabica L. seeds with the purpose of investigating a new technology to improve seed quality. The study was conducted at the Central Seed Laboratory, Department of Agriculture, at the Federal University of Lavras. Coffea arabica L. seeds were used. The study was conducted in two stages, in the first a preliminary analysis of the use of cathodic water was carried out in batches with different levels of quality. In the second it was evaluated the effect of light and of the imbibition period of the seeds in cathodic water. The seeds were immersed in distilled water and in cathodic water for eight distinct soaking periods, in absence and presence of light and then evaluated by physiological tests. It can be concluded that cathodic water can positively influence the physiological performance of the coffee seeds with poor quality, especially when embedded during periods between 4.5 to 7.5 hours in the absence of light.

Qualidade do caf�� natural e despolpado em diferentes condi����es de secagem e tempos de armazenamento

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Atributos qu��micos do solo e estado nutricional de cafeeiros em diferentes densidades populacionais

P��s-gradua����o em Agronomia - FEIS

Influence of field slope and coffee plantation age on the physical properties of a red-yellow Latosol

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Activity of some isoenzymatic systems in stored coffee grains

Considering the worldwide consumption of coffee, it is natural that throughout the history many people have dedicated the research to markers that contribute somehow on gauging its quality. This research aimed to evaluate the biochemical performance of arabica coffee during storage. Coffee in beans (natural) and in parchment (pulped) dried in concrete terrace and in dryer with heated air were packed in jute bags and stored in not controlled environmental conditions. Enzymatic activities of superoxide dismutase, catalase, peroxidase, polyphenoloxidase, esterase and lipoxygenase in coffee grains were evaluated at zero, three, six, nine and twelve months by means of electrophoresis. Independently of the drying method, the activity of isoenzymatic complexes highlighted deteriorative processes in stored grains of coffee. The treatments 60/40�� C and 60�� C used to reduce the water content imposed a greater stress condition, accelerated metabolism of natural coffee in the storage with decreased activity of defense mechanisms due to latent damage in these grains. Natural coffees are more sensible to high drying temperatures and its quality reduces faster than pulped coffee in the storage.

Ocorr��ncia de plantas daninhas em cultivo consorciado de caf�� e nogueira-macad��mia

Arborization can benefit coffee plantations by reducing the wind speed and temperature variation in the crop. It is also possible that the incident radiation can affect the weed populations and reduce the need for their control. This study aimed at assessing the weeds population and distribution, in arabica coffee intercropped with three macadamia cultivars, six years after planting, in Dois C��rregos, S��o Paulo State, Brazil. Treatments consisted of a 3x3+1 factorial scheme, i.e., coffee intercropped with three macadamia cultivars (HAES 816, IAC 4-20 and IAC 9-20) and three sampling positions of weeds in the intercropping (in the macadamia tree canopy projection, among the macadamia tree canopies projections and in the single rows), plus an additional treatment (sole coffee). The weeds incidence and control, as well as their phytosociological characterization, were evaluated. For coffee intercropped with macadamia, the weeds occurrence and number of species were smaller than for sole coffee. For the projection in the canopy and among canopies of macadamia trees, there was an average decrease of 82% in the occurrence of weeds, in comparison with the sole coffee. The IAC 9-20 cultivar was more efficient in reducing the occurrence of weeds, when intercropped with coffee, for presenting a taller canopy, with a larger diameter.

Qualidade do caf�� em coco e em pergaminho armazenados em atmosfera modificada

P��s-gradua����o em Agronomia (Energia na Agricultura) - FCA

Nitrogen metabolism in coffee plants in response to nitrogen supply by fertigation

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Higher yield and economic benefits are achieved in the macadamia crop by irrigation and intercropping with coffee

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)

Orgilinae (Hymenoptera: Braconidae) en cultivo de caf�� de Cravinhos, SP, Brasil

Funda����o de Amparo �� Pesquisa do Estado de S��o Paulo (FAPESP)