Santino Seabra Junior

Evaluation of the number and position of watermelon fruits cultivated in a greenhouse

The fruit production of watermelon, cultivar New Kodama, grown in two positions along the stem (8th-11th node and 13th-16th node), with one or two fruits per position was evaluated, under protected cultivation. The experiment was performed in Botucatu, Sao Paulo State, Brazil, from October to December, 2000. The total fruit production (kg/plant), the average fruit weight (kg/fruit) and the total soluble solids were evaluated. When only one fruit was allowed to grow between the 8th and 11th node, total fruit production was lower (2,04 kg/plant) than keeping two fruits (2,57 kg/fruit). However, the fruit production was similar (2,0 kg/plant) to one or two fruits when they were allowed to grow between the 13th and 16th node. The average fruit weight (2,05 kg/fruit) and total soluble solids (8,78obrix) were higher in fruits grown from plants with only one fruit, than two fruits per plant. Total soluble solids were also higher in fruits grown from 8th to 11th (8,21obrix) node position.

Produção e resistência ao pendoamento de alfaces tipo lisa cultivadas sob diferentes ambientes

This work was developed during the period of February to April, 2011, with the objective of indicating which environment, greenhouse or open field, provides better conditions for production, and greater resistance to bolting of different cultivars of loose-leaf lettuce, for the climatic conditions of Caceres, Mato Grosso, Brazil, Twenty treatments were evaluated, using a randomized block experimental design in a 5 x 4 factorial of five environmental conditions (shading screens of 30 and 50%, heat-reflective screens of 30 and 50%, and open field) and four cultivars of loose-leaf lettuce (Elisa, Elizabeth, Regiane and Regina), with four replications. Harvesting was carried out 30 days after transplanting. The most productive lettuce cultivars were Regiane, which obtained the greatest number of leaves, and Regina with the smallest stem length. The environmental conditions that increased resistance to bolting in the lettuce were the shading and 50% heat-reflective screens. The cultivars themselves showed no significant differences for resistance to bolting.This work was developed during the period of February to April, 2011, with the objective of indicating which environment, greenhouse or open field, provides better conditions for production, and greater resistance to bolting of different cultivars of loose-leaf lettuce, for the climatic conditions of Caceres, Mato Grosso, Brazil, Twenty treatments were evaluated, using a randomized block experimental design in a 5 x 4 factorial of five environmental conditions (shading screens of 30 and 50%, heat-reflective screens of 30 and 50%, and open field) and four cultivars of loose-leaf lettuce (Elisa, Elizabeth, Regiane and Regina), with four replications. Harvesting was carried out 30 days after transplanting. The most productive lettuce cultivars were Regiane, which obtained the greatest number of leaves, and Regina with the smallest stem length. The environmental conditions that increased resistance to bolting in the lettuce were the shading and 50% heat-reflective screens. The cultivars themselves showed no significant differences for resistance to bolting.

Estabilidade fenotípica de alfaces em diferentes épocas e ambientes de cultivo

Este trabalho teve como objetivo estimar a adaptabilidade e estabilidade fenotipica das cultivares de alface tipo crespa em diferentes epocas de cultivo em condicoes de alta temperatura. O delineamento experimental utilizado foi de blocos ao acaso em esquema fatorial 5 x 7 x 2, sendo cinco cultivares (Veronica, Vera, Cinderela, Isabela e Veneranda), sete ambientes (campo aberto, sombrite 30; 40; 50% de luz e malhas termo refletoras 30; 40 e 50%) e duas epocas de cultivo (outubro a dezembro de 2008) e (julho a setembro de 2009), com quatro repeticoes. Em relacao a producao total e producao comercial a cultivar Veronica foi a que se destacou com relacao a producao. Houve diferenca no desempenho produtivo das cultivares em relacao as epocas de cultivo. E os parâmetros do coeficiente de determinacao e indice de variacao da variavel numero de folhas sao proximos da unidade, apresentando uma maior estabilidade. A cultivar Veronica se manteve mais estavel nos periodos de producao respondendo melhor as epocas de plantio independente dos ambientes de cultivos. A cultivar Cinderela, em relacao as outras cultivares, manteve uma boa producao, sendo a segunda opcao para o cultivo.

Suscetibilidade à podridão negra e produtividade de brócolis em função de doses de nitrogênio e potássio

The purpose of this study was to investigate the influence of potassium and nitrogen on the severity of black rot and yield of head. The experiment was carried out in split plots with factorial subplots, in randomized blocks with four replications. In the plots we assessed the influence of inoculation (injured plants with distilled water and inoculated with Xanthomonas campestris pv. campestris) and in the subplots we evaluated the 4 x 4 factorial, potassium doses (0, 275, 550 and 825 kg ha-1) and nitrogen (0, 150, 300 and 450 kg ha-1). The hybrid Broccoli BRO68 was inoculated using the toothpick method at 64 days after sowing. We observed that potassium in the plant reduced the disease, but nitrogen increased disease. We estimated that the highest levels of potassum in the plant reduced the severity of the disease but lack or excess of nitrogen increased disease severity. The highest production of broccoli inflorescence was obtained at doses from 541 to 751 kg ha-1 of K2O and 286 to 328 kg ha-1 of N. However, when considering a balanced fertilization to obtain higher yield and size of inflorescences and greater resistance to black rot, the ideal doses are 283 kg ha-1 of N and 550 kg ha-1 of K2O.

Capacidade combinatória e heterose de linhagens de pepino do grupo japonês para caracteres de produção

Combining ability and heterosis of lines from Japanese cucumber type for yield The objective of this work was to estimate general (GCA) and specific combining ability (SCA) and heterosis of lines and populations of Japanese cucumber using a topcross. We obtained 16 experimental hybrids crossing two test populations (Yoshinari, T Y , and Natsusuzumi, T N , F 2 population) and eight S 5 lines obtained from Hokuho commercial hybrid. The Hokuho hybrid F 1 was also evaluated, totalizing 27 treatments. The experimental design used was randomized block, with four replicates and four plants per plot. Weight of total and commercial fruits, total number of fruits, number of commercial fruits, percentage of commercial fruits and average weight of commercial fruits were evaluated. Yoshinari population (T Y ) presented, on average, better combining ability with lines of Hokuho. Line L 7 presented the highest positive values of GCA for most of evaluated characteristics. Hybrids H 1Y and H 1N , with line L 1 as one parental, showed higher values for SCA with the test populations for most of evaluated characteristics, while the hybrids with line L 5 (H 5Y and H 5N ) showed the smallest values. Population Yoshinari F 2 showed greater potential to obtain lines for crossings with lines of Hokuho, in order to obtain hybrid with high yielding potential. Heterosis was positive for most evaluated characteristics.

Cultivo de espécies hortícolas para a segurança alimentar e nutricional de famílias assentadas em Terenos (MS), Brasil

This research had purpose to investigate the cultivation and consumption of horticultural species and its importance in food security and nutrition from the families of Jacob Fransiosi Community of Emerson Rodrigues settlement in the town of Terenos/Mato Grosso do Sul state. The exploratory research was quantitative and qualitative, using the action research methodology, observation and interviews. The settlement consists of three communities, totalyzing 136 families. It was established in 2005 and it is far about 40 km from the state capital. The resarch was done with 14 families, embrasing 35% of the families from the Community. It was noticed an average of 3.8 people per household and that was not different from rural national average, but it was higher than the rural Midwest average. The standard to establish the food security and nutrition allowed to evaluate 50% the families that could be considerate in food security, while 50% fitted in food insecurity, of which 35,8% in severe food insecurity, 7.1% moderate and 7.1% in light food insecurity. There was significant consumption of vegetables between the families that had access to horticultural, with possibility to increase it through the consumption of fruits and vegetables produced in their yards. It was concluded the need to propose public policies that encourage and subsidize the production for self-consumption of families settled, expecting to minimize the problems related to food insecurity of these subjects.

Agroclimatic analysis of melon from region southwest in Mato Grosso

Revista Brasileira de Geografia Física V. 09 N. 01 (2016) 215-225.

PLUVIAL PRECIPITATION IN EL NIÑO, LA NIÑA AND NEUTRAL YEARS IN DIAMANTINO, MT

The aim of this work was to describe the annual, monthly and ten-day pluvial precipitation variation during El Nino Southern Oscillation and neutral years, in the city of Diamantino, MT. Data from 1968 to 2003, provided by the Instituto Nacional de Metereologia, was used. To determine the most probable annual rainfall the gamma distribution was used. To check for the data fitness to the used model, the Kolmogorov-Smirnov test was applied. In general, monthly averages have described two distinct phases for the rainfall in the region, a wet season (October to April) and a dry season (May to September). The occurrence of El Nino Southern Oscillation causes a reduction on the annual average rainfall. The rainfall distribution is altered more intensely during the La Nina phase compared to neutral years, showing the highest precipitation during the fourth to the seventh ten-days periods of the year. The El Nino years present higher precipitation during January to March. The neutral years showed the highest precipitation (1862.7mm) followed by El Nino years (1729.2mm) and La Nina years (1712.5mm).

TAXAS DE DESAGREGAÇÃO DE ARGISSOLO VERMELHO-AMARELO EM ENTRESSULCOS E SOB CHUVA SIMULADA - DOI: 10.13083/1414-3984/reveng.v23n2p154-161

Water erosion reduces the productive capacity of soils and increases the amount of sediments and pollutants in water bodies. Soil loss by erosion in interrills of an Alfissol, with and without the presence of vegetation cover was evaluated. The study was conducted in the experimental area of the Mato Grosso Research Enterprise and Rural Extension/EMPAER. We used two conditions of soil management: a) plowed with disc harrow and without the presence of vegetation cover; b) plowed with disc harrow and with the presence of vegetation cover. Soil losses were quantified based on sediment lost. Samples were collected during 75 minutes of simulated rainfall with an intensity of 80 mm h-1. The bare soil showed higher disaggregation rates compared to the soil with vegetation cover, indicating that the use of vegetation contributes to dissipation of the kinetic energy of raindrops. The behavior exhibited by the disaggregation rate curves indicates that at the beginning of precipitation, the surface flow is relatively small, having no capacity to carry all the disaggregated material. The presence of vegetation greatly reduced the disaggregation process and transport of soil particles in interrills.

Produção e tolerância ao pendoamento de alface-romana em diferentes ambientes

O experimento foi conduzido na area experimental da Universidade do Estado de Mato Grosso, localizada no municipio de Caceres-MT, no periodo de maio a agosto de 2011, com o objetivo de avaliar a influencia de diferentes ambientes e espacamentos na producao e tolerância ao pendoamento de alface-romana cultivar Sophia. O delineamento experimental foi em blocos casualizados, arranjados em esquema fatorial 2 x 5, composto por dois espacamentos (30 x 30 cm e 25 x 25 cm) e cinco ambientes de cultivo (tela de sombreamento 30 e 50% , tela termorrefletora de 30 e 50% e ambiente aberto), perfazendo 10 tratamentos com quatro repeticoes cada. As parcelas experimentais foram constituidas por quatro linhas, com cinco plantas cada, totalizando 20 plantas por parcela. Consideraram-se como area util para avaliacao da producao as seis plantas centrais. As parcelas em que foi utilizado o espacamento 30 x 30 cm apresentavam 1,8 m2 cada, e as com o espacamento 25 x 25 cm, 1,5 m2 cada. As mudas foram transplantadas com 26 dias e a colheita realizada aos 46 dias apos o transplantio. Observou-se que o espacamento de 25 x 25 cm entre plantas e o ambiente aberto proporcionaram maior produtividade da alface-romana. Porem, o tempo para pendoamento das plantas no ambiente aberto foi menor que nos ambientes com as telas de sombreamento ou termorrefletora.