André Luís Teixeira Fernandes

Produção de matéria seca em pastagem de Tifton 85 irrigada, com diferentes doses de dejeto líquido de suíno

Liquid swine dejection (LSD) can constitute excellent source of fertilization in pasture, with sprinkler irrigation system, provided the conditions that assure the protection of the environment. Although with proved potential for growth without irrigation, for the Cynodon sp cultivar Tifton 85 there is little information on its behavior and production in systems under irrigation and with LSD. In order to determine the production of dry matter in irrigated and with LSD fertirrigation, an experiment was carried out in the Farm-School of the University of Uberaba - MG, Brazil, with net-sprinkler irrigation system, applying 0, 50, 100 and 200 m3 ha-1 year-1of LSD. There was significant effect among the doses of LSD in the production of dry matter, occurring additions of production with the increasing the doses. The supply of 200 m3 ha-1 year-1 of LSD made possible the production of 5,928 kg of the forage dry matter for the cycle of 28 days.

Mineral and organomineral fertirrigation in relation to quality of greenhouse cultivated melon

Fertirrigation of melon still presents problems in relation to the type of the fertilizer used, mainly the biofertilizers. This experiment, installed in Uberaba, MG, Brazil, in a plastic module greenhouse of 768 m2, tested treatments consisting of the conventional mineral fertirrigation and the organic fertirrigation, using two frequencies: daily and weekly. The best yields were obtained with daily fertilizer application, with superiority in relation to biofertilizers, with yield of 45.5 t ha-1 of fruit. This value was higher as compared to chemical products, that lead to a yield of 42.4 t ha-1. The weekly fertigation had lower productivities, and in this case, the biofertilizers also overcame the mineral, on the average 2.0 t ha-1. The best melon soluble solids values were obtained for the daily application of fertilizers, and the best treatment (P < 0.05) was the organic daily fertigation, with values of soluble solids content of 13.60° brix, followed by the daily chemical fertigation, with values of 12.52°. On the average, the amounts of soluble solids in melon were superior to the average found for Brazilian melons. Differences were not verified among the treatments for the variables pulp thickness and fruits pH. Regarding the peel thickness, the application of organic fertilizer sources presented a slight superiority in relation to chemical fertilizer treatments. No differences were verified among treatments in relation to the amount of fruits protein.

Fertirrigação na cultura do melão em ambiente protegido, utilizando-se fertilizantes organominerais e químicos

The experiment was installed in the Experimental Farm of the Uberaba University, in one of the modules of plastic greenhouse of 768 m2. Treatments consisted of two types of fertigation: conventional chemical fertigation and with biofertilizers. Also, two fertigation frequencies were studied for each type: at intervals of one and seven days. The best yields were obtained with the daily fertilizer application, with superiority for the biofertilizers, with production of 45.5 t ha-1 of fruits. This was better than mineral products, which produced 42.4 t ha-1. The weekly fertigation had lower productivities, and in this case, the biofertilizers also surpassed the chemical, on an average by 2.0 t ha-1. It was also observed that the biofertilizers delayed the crop cycle by about 8 days, compared to chemical fertigation. In spite of prolongation of crop cycle, it can be concluded that biofertilizers are efficient in nutrition of melon, with similar or even higher yields in comparison to those obtained by mineral products.

Avaliação do uso de fertilizantes organominerais e químicos na fertirrigação do cafeeiro irrigado por gotejamento

In order to evaluate coffee fertigation using different sources of mineral and organic fertilizers, comparing with conventional application, an experiment was installed in the Experimental Field -Fazenda Escola-, Uberaba in the State of Minas Gerais, Brazil, in a sandy soil, 850 m of altitude, with coffee -Catuai Vermelho IAC 144-. The following treatments were applied: chemical conventional top dressing; top dressing with conventional fertilizers, through fertigation; top dressing manuring with appropriate fertilizers for fertigation; solid organomineral fertilizers, through soil and liquid organomineral fertilizers, through fertigation. For comparison purposes, the same amounts of N, P2O5 and K2O were maintained for the different treatments. Irrigation control was accomplished by using a automatic weather station. After four harvests, it may be concluded that the sources of fertilizers used, in fertigation and in conventional application in the soil, did not show significant effects in coffee yield. Regarding the final quality of the coffee, appraised by the sensorial test in different treatments. No significant differences were verified among the treatments.

Uniformidade de distribuição superficial e subsuperficial de água e de água residuária de suinocultura com irrigação por aspersão em malha

The net-sprinkler irrigation is frequently being used in coffee, pasture, sugar cane forage and forages, due low cost system, easy installation and handling, allowing fertigation with wastewater of swine and bovine. Aiming to determine the water and wastewater of swine distribution uniformity with this irrigation system, an experiment was carried out at Uberaba University - Brazil, being used pluviometers among four sprinklers of two lateral lines. The Christiansen´s uniformity coefficient (CUC) and the uniformity distribution coefficient (UDC) were superior to the minimum recommended values, even with 200 m3 ha-1 year-1 of swine wastewater.

Análise biométrica de florestas irrigadas de eucalipto nos cinco anos iniciais de desenvolvimento

ABSTRACT This research aimed to evaluate the effects of irrigation and mineral nutrition on the growth and production of eucalyptus (Eucalyptus grandis) cultivated in the Triângulo Mineiro region, Minas Gerais, Brazil. The experiment was conducted at the Farm School of University of Uberaba, which has 850 m of altitude, in Red-Yellow Latosoil. Irrigated and non-irrigated treatments with different nutritional conditions (25, 50 and 100% of the recommended doses) were compared. The parameters of diameter at breast height and growth were evaluated during the period of five years of experimentation, the final productivity of wood was also determined at the end of that period. Even though results were statistically different throughout the years, at the end of the analyzed period it was observed that irrigated treatments showed higher biometric values as well as largest rates of mean annual increment. Proximity of values may have occurred due to excessive rainfall at the site, increasing availability of water for the non-irrigated treatments.

Development and production of fertigated coffee trees in the west region of Bahia, Brazil

This work was to evaluate the effects of different doses and fertigation parceling on the production and development of irrigated coffee drip in the Western Bahia region. He carried out the work on the farm White River Cafe, located in Barreiras - BA in coffee adults, approximately 3.5 years of age, Catuai IAC 144. The experiment was conducted in a factorial 3 x 3, three levels of nitrogen and potassium fertilization (900/800, 600/500 and 300/250 kg ha -1 yr -1 N and K 2 O) in 3 monthly installments of fertigation (2, 4 and 8 times). The variables in the experiment were: productivity, growth, yield and sieve. The doses of 600/500 and 900/800 kg ha -1 yr -1 N / K 2 O, the highest yield of the coffee. The installments of fertigation at two and eight times per month were higher in productivity. A higher effect of splitting the fertigation, on the effect of N and K 2 O in the coffee development variables (crown diameter and plant height). There was no effect of dose and fertigation parceling on rating sieve of coffee beans.

VALIDAÇÃO DA DENDROMETRIA COMO FERRAMENTA DE DECISÃO A IRRIGAÇÃO DO CAFEEIRO

The need for a conscious management of water resources promoted the adoption of irrigation management practices, which allow to analyze the water availability in the coffee 1 Discente do Curso de Agronomia, Universidade Federal de Uberlândia– Campus Monte Carmelo. 2 Discente do Curso de Agronomia, Universidade Federal de Uberlândia– Campus Monte Carmelo. 3 Discente do Curso de Agronomia, Universidade Federal de Uberlândia– Campus Monte Carmelo. 4 Discente do Curso de Agronomia, Universidade Federal de Uberlândia–Campus Monte Carmelo. 5 Prof. Doutor, Pró-Reitor de Pesquisa, Pós-graduação e Extensão, Universidade de Uberaba, E-mail: andre.fernandes@uniube.br 6 Prof. Dr. Engenharia de Sistemas Agrícolas, Universidade Federal de Uberlândia – Campus Monte Carmelo, Minas Gerais, Brasil, E-mail: eusimiofraga@ufu.br J. P. H. Cruz et al. crop, contributing to its development. Therefore, we aimed to identify a pattern of radial contraction that signals water deficit in the coffee crop in different phonological stages with the use of data obtained by dendrometry relating to parameters that characterize the water status of the plant, such as the potential of Soil water availability and meteorological data. The study was conducted at Fazenda Vitória II, located in the municipality of Monte Carmelo (MG), with topaz coffee in a 2 x 4 factorial scheme with 4 replications, totaling 32 experimental plots. The first factor have two treatments (irrigation management strategy based on soil water balance and strategy of traditional irrigation management of the property use of tensiometers) and the second factor have four replications representing the irrigation slides to be tested, being 125%, 100%, 75% and 50% of the leaf needed to restore the water consumption of coffee. The parcels will be arranged in randomized blocks, with each parcel consisting of a set of 18 plants. The variable analyzed was the micro variation of stem diameter that established a direct relation with the water availability of the plants.

Efeitos da irrigação na produção e no desenvolvimento do cafeeiro na região oeste da Bahia

Irrigation redesigned the distribution of the cultivation of coffee in Brazil, and upon this, new studies in water consumption and in its relationships with production and growth in coffee became necessary. The objective of this work was to evaluate the effects of irrigation on the production and growth in coffee irrigated by drip irrigation, in the West region of Bahia. For this, a trial was carried out in the farm Cafe do Rio Branco, located in Barreiras – BA. The experiment was caried out with adult plants of coffee of the variety Catuai Vermelho, approximately 3.5 years old and set up in a randomized block design, with five treatments and four replicates. The treatments corresponded to 75, 85, 100, 125 and 150% of the irrigation depth and were calculated by the Irriplus software. It was evaluated the productivity, water use efficiency (WUE), vegetative development, sieve classification, as well as the yield and maturation of fruits. A significant effect of the irrigation depth in yield, WUE and maturation of fruits (green and cherry) was observed at the end of four consecutive harvests. The estimated maximum productivity (60 sc ha-1), was obtained with 129% of the irrigation depth and a maximum WUE (5.7 kg mm-1) obtained with 75%. As to maturation, they were significant only for green (19.7%) and cherry fruits (67.5) with the irrigation depths of 119 and 121%, respectively. There was no significant effect of the different irrigation depths in the vegetative development, sieve classification and yield of fruits.

Biometric analysis of eucalyptus forests in the five initial years of development

This research is aimed at evaluating the effects of irrigation and mineral nutrition on the growth and production of eucalyptus (Eucalyptus grandis) cultivated in the region of Triângulo Mineiro. The experiment was conducted at the Farm School of Universidade de Uberaba, which has 850 m of altitude, in redyellowish Latosoil. Irrigated treatments and non-irrigated treatments with different nutritional conditions (25%, 50% and 100% of the recommended doses) were compared. It was evaluated the parameters of diameter at breast height and growth in a period of five years of conducted experiment; the final productivity of wood was also determined at the end of that period. Even though results were statistically different throughout the years, at the end of the analyzed period it was observed that irrigated treatments showed the biggest biometric values as well as the biggest rates of annual medium increment. Proximity of values may have occurred due to excessive rainfall at the local, making water more available to the non-irrigated treatments.