cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.19928912.v1
title: Cantaloupe melon ( Cucumis melo L.) conservation using hydrocooling

description: ABSTRACT Maintaining cantaloupe melon at field temperature impairs conservation as it speeds up cell metabolism and transpiration, and, consequently, reduces shelf life. This study aimed to evaluate the conservation of Torreon hybrid cantaloupe using the hydrocooling treatment. Fruits were harvested at the commercial maturity stage (60 days after planting), in the morning, at the Nova California Farm, municipality of Mossoró-RN, in September 2007. One set of fruit was immersed in chilled water at 5 ºC for 5 min, at the packing house, while the remaining set was not hydro cooled. Then, both sets (treated and untreated with hydrocooling) were pre-cooled in air forced tunnels at 7 ºC, until the temperature in the pulp reached 10 ºC. Both fruit sets were stored for 0, 14, 21, 28 and 35 days under modified atmosphere at 3 ± 1 oC and 90 ± 5% RH. After each storage period, the fruits were incubated in an atmosphere-controlled chamber at 20 ± 2 oC and 80 ± 5% de RH, for seven days. The following characteristics were evaluated: external and internal appearance, mass loss, soluble solids, firmness and titrable acidity. The experiment was arranged in a completely randomized split-plot design with four replications of three fruits. The plots consisted of the hydrocooling conditions (with and without fruit soaking in chilled water), and the sub-plots consisted of the storage times (0, 14, 21, 28 and 35 days).The treatment with hydrocooling was efficient in keeping the firmness and soluble solids of the fruits and shortened the pre-cooling time in the cooling tunnel. However, hydrocooling did not increase fruit shelf-life.
DOI: 10.6084/m9.figshare.19928913
title: Effect of plant-biostimulant on cassava initial growth

description: ABSTRACT Biostimulants are complex substances that promote hormonal balance in plants, favor the genetic potential expression, and enhance growth of shoots and root system. The use of these plant growth promoters in crops can increase quantitatively and qualitatively crop production. Therefore, the aim of this study was to evaluate the effect of a commercial biostimulant on the initial growth of cassava. The experiment was arranged in a 2 x 5 factorial design, corresponding to two cassava cultivars (Cacau-UFV and Coimbra) and five biostimulant concentrations (0, 4, 8, 12 and 16 mL L-1). At 90 days after planting, the characteristics leaf area, plant height, stem diameter, leaf number, total dry matter and dry matter of roots, stems and leaves were evaluated. The biostimulant promoted linear increases in plant height, leaf number, leaf area, total dry matter, dry matter of stems, leaves and roots. The cultivar Cacau-UFV had a higher growth rate than the cultivar Coimbra. The growth promoter stimulated the early growth of the cassava crop.
DOI: 10.6084/m9.figshare.19928913.v1
title: Effect of plant-biostimulant on cassava initial growth

description: ABSTRACT Biostimulants are complex substances that promote hormonal balance in plants, favor the genetic potential expression, and enhance growth of shoots and root system. The use of these plant growth promoters in crops can increase quantitatively and qualitatively crop production. Therefore, the aim of this study was to evaluate the effect of a commercial biostimulant on the initial growth of cassava. The experiment was arranged in a 2 x 5 factorial design, corresponding to two cassava cultivars (Cacau-UFV and Coimbra) and five biostimulant concentrations (0, 4, 8, 12 and 16 mL L-1). At 90 days after planting, the characteristics leaf area, plant height, stem diameter, leaf number, total dry matter and dry matter of roots, stems and leaves were evaluated. The biostimulant promoted linear increases in plant height, leaf number, leaf area, total dry matter, dry matter of stems, leaves and roots. The cultivar Cacau-UFV had a higher growth rate than the cultivar Coimbra. The growth promoter stimulated the early growth of the cassava crop.
DOI: 10.6084/m9.figshare.19928946
title: Absorption of primary macronutrients and soybean growth at different compactation densities and moisture levels in a silt loam soil

description: ABSTRACT Soybean cultivation is increasing rapidly in the region of Alto Vale do Itajaí, State of Santa Catarina, where there is a predominance of silt soils. The objective of this work was to evaluate the content of primary macronutrients in shoots and shoot and root vegetative growth of soybean (Glicine max L. Merrill) grown in a silt-loam soil under different compactation densities and moisture levels. A randomized block design in a 4x4 factorial arrangement was used, with four compactation densities: 1.00; 1.20; 1.40 and 1.60 Mg m-3, and four soil moisture levels: 0.130; 0.160; 0.190 and 0.220 kg kg-1 and four replications. Each pot consisted of the overlapping of three 150-mm PVC rings, where soil was maintained in the higher and lower part of the pot with a density of 1.00 Mg m-3 and in the intermediate ring, the compactation densities were increased. Values of soil density higher than 120 Mg m-3 negatively affected N, P and K uptake by soybean plants, as well as the plant mass of the shoots and roots. The higher levels of soil moisture reduced the compaction effect and promoted better absorption of P and K.
DOI: 10.6084/m9.figshare.19928946.v1
title: Absorption of primary macronutrients and soybean growth at different compactation densities and moisture levels in a silt loam soil

description: ABSTRACT Soybean cultivation is increasing rapidly in the region of Alto Vale do Itajaí, State of Santa Catarina, where there is a predominance of silt soils. The objective of this work was to evaluate the content of primary macronutrients in shoots and shoot and root vegetative growth of soybean (Glicine max L. Merrill) grown in a silt-loam soil under different compactation densities and moisture levels. A randomized block design in a 4x4 factorial arrangement was used, with four compactation densities: 1.00; 1.20; 1.40 and 1.60 Mg m-3, and four soil moisture levels: 0.130; 0.160; 0.190 and 0.220 kg kg-1 and four replications. Each pot consisted of the overlapping of three 150-mm PVC rings, where soil was maintained in the higher and lower part of the pot with a density of 1.00 Mg m-3 and in the intermediate ring, the compactation densities were increased. Values of soil density higher than 120 Mg m-3 negatively affected N, P and K uptake by soybean plants, as well as the plant mass of the shoots and roots. The higher levels of soil moisture reduced the compaction effect and promoted better absorption of P and K.
DOI: 10.6084/m9.figshare.19928948.v1
title: Effect of spatial arrangement on the production components and yield of sunflower

description: ABSTRACT The sunflower plant is an oilseed crop that has aroused a great interest in the Brazilian and international scenery especillay because of the possibility of using its oil for biodiesel production. The objective of this study was to evaluate productivity and yield components of Embrapa 122 sunflower according to the spatial arrangement. Treatments were arranged in 4 x 4 factorial arrangement, which are the four spacings between rows (0.30; 0.50; 0.70 and 0.90 m) and four sowing densities (30,000; 45,000; 60,000 and 75,000 plants ha-1). The experiment was carried out in a complete randomized block design with four replications. The experiments were conducted in the experimental area of the Plant Science Department in Fortaleza, State of Ceará-Brazil and on the Curu Vale Experimental Farm in Pentecoste, State of Ceará-Brazil. Productivity and the following production components were analyzed in the end of the crop cycle: harvested capitula, capitulum diameter, capitulum mass, achene mass per capitulum, mass of 100 achenes, achenes per capitulum, harvest index and oil content in the achenes. The experiments were analyzed jointly in relation to the cropping area and the data submitted to analysis of variance and quantitative factors tested by polynomial regression. The variables, spacing, density and cropping area did not interact with these variables and the spatial arrangement of the plants affected only the components. The cropping area influences the productive behavior of sunflower Embrapa 122. The spatial arrangement of the plants of sunflower of variety Embrapa 122 influences yield components but does not affect productivity.
DOI: 10.6084/m9.figshare.19928948
title: Effect of spatial arrangement on the production components and yield of sunflower

description: ABSTRACT The sunflower plant is an oilseed crop that has aroused a great interest in the Brazilian and international scenery especillay because of the possibility of using its oil for biodiesel production. The objective of this study was to evaluate productivity and yield components of Embrapa 122 sunflower according to the spatial arrangement. Treatments were arranged in 4 x 4 factorial arrangement, which are the four spacings between rows (0.30; 0.50; 0.70 and 0.90 m) and four sowing densities (30,000; 45,000; 60,000 and 75,000 plants ha-1). The experiment was carried out in a complete randomized block design with four replications. The experiments were conducted in the experimental area of the Plant Science Department in Fortaleza, State of Ceará-Brazil and on the Curu Vale Experimental Farm in Pentecoste, State of Ceará-Brazil. Productivity and the following production components were analyzed in the end of the crop cycle: harvested capitula, capitulum diameter, capitulum mass, achene mass per capitulum, mass of 100 achenes, achenes per capitulum, harvest index and oil content in the achenes. The experiments were analyzed jointly in relation to the cropping area and the data submitted to analysis of variance and quantitative factors tested by polynomial regression. The variables, spacing, density and cropping area did not interact with these variables and the spatial arrangement of the plants affected only the components. The cropping area influences the productive behavior of sunflower Embrapa 122. The spatial arrangement of the plants of sunflower of variety Embrapa 122 influences yield components but does not affect productivity.
DOI: 10.6084/m9.figshare.19928949
title: Growth and mineral nutrition of green onions grown hydroponically under different N, P and K concentrations

description: ABSTRACT In hydroponic cultivation of leafy vegetables, the plant nutritional requirements are among the most important factors that influence production and product quality. The objective of this study was to evaluate the effect of levels of N, P and K on the dry matter production and mineral nutrition of hydroponically grown green onion cultivar 'Todo Ano" (Allium fistulosum L.). Experiments were conducted with each nutrient at three levels: starvation, adequate and excessive. The experiments were arranged in a completely randomized design, split plot in time, with four replications and ten plants per plot. At 15, 30, 45 and 60 days after transplanting (DAT), dry matter production of shoots and roots were evaluated. At 45 and 60 DAT, the contents and total accumulation of N, P and K and the contents of Ca and Mg in the shoots were evaluated. In hydroponics, N and P deficiencies are more limiting than K deficiency. The growth of green onion cultivar 'Todo Ano ' with low levels of P mainly affected the growth of the root system. Nitrogen deficiency negatively affected the absorption of P, K, Ca and Mg. The toxicity of N in green onion is manifested by excessive growth of the aerial part and increased laxity of the leaves. Excessive P and K in the nutrient solution caused no visual symptoms of toxicity of P or K, but excessive levels of K decreases the Ca and Mg contents in the shoots.
DOI: 10.6084/m9.figshare.19928949.v1
title: Growth and mineral nutrition of green onions grown hydroponically under different N, P and K concentrations

description: ABSTRACT In hydroponic cultivation of leafy vegetables, the plant nutritional requirements are among the most important factors that influence production and product quality. The objective of this study was to evaluate the effect of levels of N, P and K on the dry matter production and mineral nutrition of hydroponically grown green onion cultivar 'Todo Ano" (Allium fistulosum L.). Experiments were conducted with each nutrient at three levels: starvation, adequate and excessive. The experiments were arranged in a completely randomized design, split plot in time, with four replications and ten plants per plot. At 15, 30, 45 and 60 days after transplanting (DAT), dry matter production of shoots and roots were evaluated. At 45 and 60 DAT, the contents and total accumulation of N, P and K and the contents of Ca and Mg in the shoots were evaluated. In hydroponics, N and P deficiencies are more limiting than K deficiency. The growth of green onion cultivar 'Todo Ano ' with low levels of P mainly affected the growth of the root system. Nitrogen deficiency negatively affected the absorption of P, K, Ca and Mg. The toxicity of N in green onion is manifested by excessive growth of the aerial part and increased laxity of the leaves. Excessive P and K in the nutrient solution caused no visual symptoms of toxicity of P or K, but excessive levels of K decreases the Ca and Mg contents in the shoots.
DOI: 10.6084/m9.figshare.19928951.v1
title: Carbohydrates Concentration in leaves of potato plants affected by nitrogen fertilization rates

description: ABSTRACT At poor conditions of nitrogen (N) in the soil, potato plants may accumulate starch in leaves and be indicative of N nutritional stress. The objective of this work was to determine the effects of N rates (0, 50, 100, 200 and 300 kg ha-1 of N) on the concentrations of carbohydrates (total soluble sugars-TSS, reducing sugars-RS, non-reducing sugars-NRS and starch) in the fourth leaf (FL) of two potato cultivars (Asterix and Atlantic) and their critical levels (CL) associated to the N fertilization rate necessary to obtain the maximum physical (MPE) and economic (MEE) efficiency of tubers. A randomized block design with four replications was used in both experiments. On day 21 after plant emergence, four FL were collected from four plants. Potatoes plants fertilized with low rates of N accumulated less TSS in leaves than those properly fertilized. The opposite occurred with content of starch. The cultivars showed similar responses to five doses of N in relation to contents of starch and TSS. However, the response to the increase in doses of N for RS, NRS and Starch/NRS is cultivar-specific. The correlations between contents of RS, NRS and Starch/NRS with the starch and TSS were dependent on the potato cultivar.
DOI: 10.6084/m9.figshare.19928951
title: Carbohydrates Concentration in leaves of potato plants affected by nitrogen fertilization rates

description: ABSTRACT At poor conditions of nitrogen (N) in the soil, potato plants may accumulate starch in leaves and be indicative of N nutritional stress. The objective of this work was to determine the effects of N rates (0, 50, 100, 200 and 300 kg ha-1 of N) on the concentrations of carbohydrates (total soluble sugars-TSS, reducing sugars-RS, non-reducing sugars-NRS and starch) in the fourth leaf (FL) of two potato cultivars (Asterix and Atlantic) and their critical levels (CL) associated to the N fertilization rate necessary to obtain the maximum physical (MPE) and economic (MEE) efficiency of tubers. A randomized block design with four replications was used in both experiments. On day 21 after plant emergence, four FL were collected from four plants. Potatoes plants fertilized with low rates of N accumulated less TSS in leaves than those properly fertilized. The opposite occurred with content of starch. The cultivars showed similar responses to five doses of N in relation to contents of starch and TSS. However, the response to the increase in doses of N for RS, NRS and Starch/NRS is cultivar-specific. The correlations between contents of RS, NRS and Starch/NRS with the starch and TSS were dependent on the potato cultivar.
DOI: 10.6084/m9.figshare.19928952
title: Effect of phosphorus levels on yield and postharvest storage of onion cultivars

description: ABSTRACT Phosphorus is recognized as a key nutrient to obtain high productivity and macronutrient that has been most often limits the production in soil poor in nutrient. With the objective of evaluating the influence of phosphorus levels and cultivars on yield and storage postharvest was carried one trial in Petrolina-PE, Brazil, from May to December 2011. The experimental design was a completely randomized block in a 5 x 2 factorial scheme, composed of five phosphorus levels (0; 60; 120, 180 and 240 kg ha-1) and two cultivar (Franciscana IPA-10 e Vale Ouro IPA-11) with four replications. The Franciscana IPA-10 cultivars (74.6 t ha-1) and Vale Ouro IPA-11 (76.1 t ha-1) showed no significant differences in commercial yield of bulbs. Highest commercial yield were obtained at dose of 132 kg ha-1 P2O5 was associated with economical dose of 130 kg ha-1 P2O5. It was verified with increasing levels, a gradual reduction in the production of bulbs considered non-commercial (culls), and the lower production estimated of culls was estimated dose of 121 kg ha-1 P2O5. Commercial bulbs of higher fresh mass and diameter were obtained with the increment of phosphorus. There was no loss of significant mass after 30 days cure at doses or cultivars. At 60 after curing, it was detected a significant effect only for cultivars with less loss to cultivar Franciscana IPA-10 (27.2%) compared the cultivar Vale Ouro IPA-11 (31.9%).
DOI: 10.6084/m9.figshare.19928952.v1
title: Effect of phosphorus levels on yield and postharvest storage of onion cultivars

description: ABSTRACT Phosphorus is recognized as a key nutrient to obtain high productivity and macronutrient that has been most often limits the production in soil poor in nutrient. With the objective of evaluating the influence of phosphorus levels and cultivars on yield and storage postharvest was carried one trial in Petrolina-PE, Brazil, from May to December 2011. The experimental design was a completely randomized block in a 5 x 2 factorial scheme, composed of five phosphorus levels (0; 60; 120, 180 and 240 kg ha-1) and two cultivar (Franciscana IPA-10 e Vale Ouro IPA-11) with four replications. The Franciscana IPA-10 cultivars (74.6 t ha-1) and Vale Ouro IPA-11 (76.1 t ha-1) showed no significant differences in commercial yield of bulbs. Highest commercial yield were obtained at dose of 132 kg ha-1 P2O5 was associated with economical dose of 130 kg ha-1 P2O5. It was verified with increasing levels, a gradual reduction in the production of bulbs considered non-commercial (culls), and the lower production estimated of culls was estimated dose of 121 kg ha-1 P2O5. Commercial bulbs of higher fresh mass and diameter were obtained with the increment of phosphorus. There was no loss of significant mass after 30 days cure at doses or cultivars. At 60 after curing, it was detected a significant effect only for cultivars with less loss to cultivar Franciscana IPA-10 (27.2%) compared the cultivar Vale Ouro IPA-11 (31.9%).
DOI: 10.6084/m9.figshare.19928954.v1
title: Growth of sugar cane varieties under salinity

description: ABSTRACT Large salty areas in the Brazilian semi-arid region have limited farming in Northeastern Brazil. One example is the sugar cane cultivation, which reinforces the need of selecting varieties that are more tolerant to salinity. The objective of this study was to evaluate the effect of salinity on growth of ten varieties of sugar cane. The experiment was conducted in a greenhouse, set in the experimental field of Embrapa Semiárido, in Petrolina, Pernambuco State. The experimental design was randomized blocks arranged in a 6 X 10 factorial arrangement, comprised of six levels of salinity (0, 1.0, 2.0, 4.0, 6.0 and 8.0 dS m-1) and ten sugar cane varieties (VAT 90212; RB 72454; RB 867515; Q 124; RB 961003; RB 957508; SP791011; RB 835089; RB 92579 and SP 943206). Salt levels of irrigation water were obtained by adding NaCl, CaCl2.2H2O and MgSO4.7H2O to achieve an equivalent ratio among Na:Ca:Mg of 7:2:1. Sixty days later, plant height, stem diameter (base), number of leaves, stalks and sprouts, leaf area and fresh and dry mass of the aerial part and roots were all measured. The varieties of sugar cane showed similar responses for growth reduction as soil salinity increases, being considered moderately sensitive to salinity.
DOI: 10.6084/m9.figshare.19928954
title: Growth of sugar cane varieties under salinity

description: ABSTRACT Large salty areas in the Brazilian semi-arid region have limited farming in Northeastern Brazil. One example is the sugar cane cultivation, which reinforces the need of selecting varieties that are more tolerant to salinity. The objective of this study was to evaluate the effect of salinity on growth of ten varieties of sugar cane. The experiment was conducted in a greenhouse, set in the experimental field of Embrapa Semiárido, in Petrolina, Pernambuco State. The experimental design was randomized blocks arranged in a 6 X 10 factorial arrangement, comprised of six levels of salinity (0, 1.0, 2.0, 4.0, 6.0 and 8.0 dS m-1) and ten sugar cane varieties (VAT 90212; RB 72454; RB 867515; Q 124; RB 961003; RB 957508; SP791011; RB 835089; RB 92579 and SP 943206). Salt levels of irrigation water were obtained by adding NaCl, CaCl2.2H2O and MgSO4.7H2O to achieve an equivalent ratio among Na:Ca:Mg of 7:2:1. Sixty days later, plant height, stem diameter (base), number of leaves, stalks and sprouts, leaf area and fresh and dry mass of the aerial part and roots were all measured. The varieties of sugar cane showed similar responses for growth reduction as soil salinity increases, being considered moderately sensitive to salinity.
DOI: 10.6084/m9.figshare.19928957
title: In vitro cultivation of "Prata Anã" banana Gorutuba clone in agitated and stationary liquid medium

description: ABSTRACT The aim of this study was to evaluate in vitro cultivation of banana Prata Anã clone Gorutuba in differents volumes of liquid medium in the stationary system and under agitation, comparing with the traditional cultivation in semisolid medium. The experiment was conducted in a completely randomized design with factorial 5 x 2 + 1, with five volumes (10, 15, 20, 25 and 30 mL) of liquid medium and two cropping systems (agitation and stationary) and control (semisolid medium), with 4 replicates, each plot had a bottle with 4 explants. The number of shoots/explant observed by the control on the third subculture differs from some treatments in liquid medium. In the fourth subculture, the number of shoots/explant of the control differed from all treatments in liquid medium, and cultivation under agitation system favored a number of shoots/explant significantly higher than that obtained by the stationary system. In the elongation and rooting phases, the results obtained in liquid medium, they were better than the control. Comparing the two systems of cultivation in liquid medium, we noted greater growth for plantlets which remained under agitation with the volume of 30ml. The cultivation in semisolid medium is more efficient in vitro multiplication phase, and in the phase of elongation and rooting the best system to be adopted is the cultivation in liquid medium under agitation to 30 mL.