scholarly journals Growth of Okra Under Nitrogen Rates and Wastewater in the Brazilian Semiarid Region

2019 ◽  
Vol 11 (5) ◽  
pp. 408
Author(s):  
Aldair de Souza Medeiros ◽  
Sebastião de Oliveira Maia Júnior ◽  
Giordano Bruno Medeiros Gonzaga ◽  
Thiago Cândido dos Santos ◽  
Manoel Moisés Ferreira de Queiroz ◽  
...  
Keyword(s):  
Natural Resources ◽  
Nitrogen Fertilization ◽  
Block Design ◽  
Domestic Wastewater ◽  
Treated Wastewater ◽  
Semiarid Region ◽  
Semiarid Regions ◽  
Randomized Block Design ◽  
Brazilian Semiarid ◽  
Nitrogen Rates

Water is one of the most important natural resources, especially for semiarid regions where it is very limited. Thus, some alternatives to preserve water are necessary. In this sense, we aimed to evaluate the effect of irrigation with post-treated domestic wastewater associated with different nitrogen rates on the growth of okra in the semiarid region of Brazil. The experiment was performed in the municipality of Pombal, state of Paraíba, Brazil. It was used a randomized block design with six nitrogen rates (N1 = 0, N2 = 40, N3 = 80, N4 = 120, N5 = 160, and N6 = 200 kg ha-1) and wastewater corresponding respectively to 0; 25; 50; 75; 100; and 125% of the fertilization recommendation for the okra crop. In addition to these treatments, a control was added and the plants received 100% of the recommended dose of nitrogen and they were irrigated with water (IW). The control was compared with the treatments that were irrigated with wastewater and received the minimum (0%) and the recommended (100%) doses of nitrogen fertilization. The use of treated wastewater is an excellent technique for the reuse of water in semiarid regions, but it does not fully meet the okra nitrogen requirements.

scholarly journals Yield of the Okra Submitted to Nitrogen Rates and Wastewater in Northeast Brazilian Semiarid Region

2018 ◽  
Vol 10 (4) ◽  
pp. 409 ◽  
Author(s):  
Aldair De Souza Medeiros ◽  
Manoel Moisés Ferreira de Queiroz ◽  
Renato A. de Araújo Neto ◽  
Patrícia Da Silva Costa ◽  
Amanda Costa Campos ◽  
...  
Keyword(s):  
Block Design ◽  
Domestic Wastewater ◽  
Growth And Yield ◽  
Intermittent Flow ◽  
Semiarid Region ◽  
Santa Cruz ◽  
Randomized Block Design ◽  
Brazilian Semiarid ◽  
Nitrogen Rates ◽  
Available Volume

Water is an indispensable resource for the maintenance of life; however, the available volume for consumption has decreased over a period of life, as a result of which, the availability of water that is inferior in quality has increased. In this context, we aimed to evaluate the growth and yield of okra (Santa Cruz cultivar) under different nitrogen rates and irrigation facilities using post-treated domestic wastewater through sand filter with intermittent flow in a Brazilian semiarid region. The experiment was performed in the Pombal region of the Paraíba state, Brazil using a randomized block design with six nitrogen Rates (N1 = 0, N2 = 40, N3 = 80, N4 = 120, N5 = 160, and N6 = 200 kg ha-1) and irrigation by using wastewater. The water was added to the treatment with 100% (160 kg ha-1) using nitrogen fertilization recommendation and irrigation water supply. The effects of treatments on the growth and production variables of okra plants were evaluated.

scholarly journals ADUBAÇÃO NITROGENADA E USO DE REGULADOR DE CRESCIMENTO NA PRODUÇÃO DE TRIGO DE SEQUEIRO

2018 ◽  
Vol 14 (4) ◽  
pp. 01-09
Author(s):  
Claudio Hideo Martins da Costa ◽  
Jordana Rafaela Guimarães Vilela ◽  
Ana Laura Silva de Sousa ◽  
Rogério Borges de Oliveira Paz ◽  
Bárbara Fátima Silva Moura
Keyword(s):  
Nitrogen Fertilization ◽  
Management Practice ◽  
Cropping Systems ◽  
Flag Leaf ◽  
Block Design ◽  
Climatic Conditions ◽  
Randomized Block Design ◽  
Increase In Productivity ◽  
Nitrogen Rates ◽  
Ear Number

Nitrogen fertilization is an important management practice in grasses and quite complex, due to the different factors that influence such as climatic conditions, cropping systems, rates and available sources. The objective of this work was to evaluate the different rates of side dressing nitrogen and the effect of the trinexapac-ethyl on wheat (Triticum aestivumL.).The experiment was a randomized block design in a 5x2 factorial scheme, with 4 replicates. The treatments were composed of five nitrogen rates applied in side dressing(0, 20, 40, 80 and 160 kg ha-1of N) and two rates ofetil-trinexapac (0 e 100 g ha-1do active ingredient)in the wheat crop.The following variables were evaluated: shoot dry matter, plant height, flag leaf height, ear insertion height, distance of source and drain, ear length, number of ears per square meter, number of spikelets per ear, fertility of spikelets, number of grains per ear, number of grains per spikelet, mass of one thousand grains, grain yield), hectoliter weight, and grain protein. The growth regulator changes the morphological components of wheat, but does not alter the productive components and yield of grains, not justifying their use under the conditions under which the study took place. Nitrogen fertilization does not alter the morphological components of wheat plants, but increases the number of ears per m2up to a rate of 52 kg ha-1of N, reflecting the increase in productivity up to the rate of 59 kg ha-1.

Pruning Intensity and Lopping System in Fig Plants in the Brazilian Semiarid Region

2019 ◽  
pp. 1-9
Author(s):  
Francisco Sidene Oliveira Silva ◽  
Vander Mendonça ◽  
Anderson Araujo Alves ◽  
Wagner Cesar De Farias ◽  
Elizangela Cabral Dos Santos ◽  
...  
Keyword(s):  
Block Design ◽  
Titratable Acidity ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Semiarid Region ◽  
Physical Chemical ◽  
Randomized Block Design ◽  
Brazilian Semiarid ◽  
Fig Trees ◽  
Pruning Intensity

Aims: Fig plants produce fruits in branches of the year, which grow after emission of buds from the leaf armpits. And the lopping system is one of the most common practices among the green fig farmers to increase production. Thus, the present work aimed to improve the physical, chemical and productive characteristics of fig trees in the semiarid region of Brazil. Study Design: A complete randomized block design was used in a 3x2 factorial scheme (three pruning intensities: 5, 10 and 15 cm in length; and two lopping systems: with and without lopping), constituting six treatments with four replicates. Each experimental plot consisted of five plants, but only the three central plants were used. Place and Duration of Study: The experiment was conducted in the didactic orchard of the Federal Rural University of Semiarid (UFERSA), Mossoró, RN. Methodology: The treatments were: 5 cm pruning without lopping; 5 cm pruning with lopping; 10 cm pruning without lopping; 10 cm pruning with lopping; 15 cm pruning without lopping; 15 cm pruning with lopping. The following variables were analyzed: fruit weight (g), fruit length (cm), fruit diameter (cm), pulp firmness (N), soluble solids content (ºBrix), titratable acidity (%), vitamin C content (mg ascorbic acid 100 g-1 pulp), fruit yield (number of fruits plant-1 and kg plant-1). Data were submitted to analysis of variance by the F test at 5% probability and means were grouped using the Tukey test at 5% probability. The analysis was performed using R software version 3.5.2. Conclusion: Pruning intensity 10 cm in length and the use of lopping system influenced the physical, chemical and productive characteristics of fig plants in the Brazilian semiarid region.

scholarly journals NITROGEN AND ORGANIC FERTILIZATION ON GRAPEVINE PRODUCTIVITY IN THE BRAZILIAN SEMIARID REGION

2019 ◽  
Vol 32 (1) ◽  
pp. 121-130
Author(s):  
Franciezer Vicente de Lima ◽  
Vander Mendonça ◽  
Francisco Sidene Oliveira Silva ◽  
Francisco Mickael de Medeiros Câmara ◽  
Toni Halan da Silva Irineu
Keyword(s):  
Block Design ◽  
Organic Fertilizer ◽  
Semiarid Region ◽  
Limiting Factor ◽  
Organic Fertilization ◽  
Randomized Block Design ◽  
Semi Arid Region ◽  
N Rates ◽  
Nitrogen Rates ◽  
Fertilizer Rates

ABSTRACT Nitrogen fertilization is a limiting factor for grapevine production; its excess or deficiency can cause changes in fruit quantity and quality. Thus, the objective of this work was to evaluate productive parameters of grapevines of the Isabel-Precoce cultivar subjected to nitrogen and organic fertilization in the western semiarid region of the state of Rio Grande do Norte (RN), Brazil. The experiment was conducted at the Experimental Farm of the Federal Rural University of the Semi-Arid Region, in Mossoró, RN, Brazil, during two production cycles. The soil of the area used was classified as dystrophic Red Argissolo (Udult) of sandy texture. The experiment was conducted in a randomized block design with six replications, using a 5×2 factorial arrangement, with 5 nitrogen fertilizer rates (0, 30, 60, 90, and 120 kg ha-1) and two organic fertilizer rates (0, and 20 m3 ha-1 of bovine manure). The production components number of bunches per plant, grape production per plant, grape yield, weight, length and width of bunches, number of berries per bunch, and ten-berry weight were evaluated. The nitrogen rates and organic fertilizer rates used were significant (p=0.05) for all evaluated components. The N rate of 60 kg ha-1 combined with the organic fertilization generated the best results for the analyzed variables. N rates from 60 to 120 kg ha-1, applied singly or combined with organic fertilizer, hindered the production components of the Isabel-Precoce grapevines.

scholarly journals Precocity, yield and water-use efficiency of banana plants under planting densities and irrigation depths, in semiarid region

2019 ◽  
Vol 49 ◽  
Author(s):  
Marcelo Rocha dos Santos ◽  
Sérgio Luiz Rodrigues Donato ◽  
Diogo Barreto Magalhães ◽  
Manoel Pereira Cotrim
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Block Design ◽  
Planting Density ◽  
Semiarid Region ◽  
Randomized Block Design ◽  
Brazilian Semiarid ◽  
Split Plot ◽  
Irrigation Depth ◽  
Use Efficiency

ABSTRACT Banana is a crop of major importance for the Brazilian semiarid region. However, because of the low availability and irregularities of the rainfall in this area, it is necessary to combine techniques that allow a higher water-use efficiency. This study aimed to evaluate the influence of different combinations of irrigation depths and planting densities on the precocity, yield and water-use efficiency of BRS Platina banana plants, in the semiarid region of the Bahia state, Brazil. A randomized block design with four replicates was used, in a split-plot arrangement. Irrigation depths of 55 %, 70 %, 85 % and 100 % of the crop evapotranspiration (ETc) were assigned to the plot, and the planting densities of 1,600 plants ha-1, 2,000 plants ha-1, 2,666 plants ha-1 and 3,333 plants ha-1 to the split-plot. The hands weight and number of fruits decreased in a linear way with the increase in the planting density (1,600 plants ha-1 to 3,333 plants ha-1) from 10.89 kg to 9.49 kg and from 97.16 to 89.86, respectively; whereas the hands yield (15.5 t ha-1 to 25.79 t ha-1) and the harvest period (442 to 455 days) increased. The number of fruits increased linearly from 89.46 to 98.08 with the irrigation depth of 55 % to 100 % of the ETc. The yield and water-use efficiency increased linearly as the planting density increased (1,600 plants ha-1 to 3,333 plants ha-1) from 5.14 to 8.60, while the water-use efficiency decreased with the irrigation depth from 7.97 to 5.50, conidering 55 % to 100 % of the ETc. It is possible to obtain higher yields and a higher water-use efficiency by using a higher planting density and irrigation levels below 100 % of the ETc.

scholarly journals Panicum maximum cv. Aries Establishment under Weed Interference with Levels of Light Interception and Nitrogen Fertilization

2019 ◽  
Vol 37 ◽  
Author(s):  
S. KRUCHELSKI ◽  
L.S. SZYMCZAK ◽  
L. DEISS ◽  
A. MORAES
Keyword(s):  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Block Design ◽  
Interspecific Interaction ◽  
Light Interception ◽  
Panicum Maximum ◽  
Dry Matter Accumulation ◽  
Weed Interference ◽  
Randomized Block Design ◽  
Nitrogen Rates

ABSTRACT: The aim of this study was to evaluate the establishment of the pasture of Panicum maximum cv. Aries in an environmentally protected area under levels of interspecific interaction with the weed community. The experiment started after sowing P. maximum, and it was carried out in a randomized block design with four replications and the following factors: 3 light interception levels, 2 nitrogen rates, and 7 weekly sampling dates along pasture establishment (3x2x7). The light interception treatments, determined by photosynthetically active radiation, were given by mowing weeds over the canopy of P. maximum at 40% and 70% light interception, and no mowing (uncontrolled growth of weeds and P. maximum). Topdressing application of nitrogen in the form of urea was performed or not (0 or 200 kg N ha-1). The plant community was evaluated by number of species, dry matter accumulation, and density, and phytosociological indices were determined. The relative importance and dry matter accumulation of P. maximum were greater after nitrogen fertilization, which favored the species against weed competition. In contrast, there was lower weed density without nitrogen fertilization. Mowing weeds at 40% of light interception enabled P. maximum to accumulate more dry matter, while there was no difference between mowing weeds at 70% light interception and growing the forage crop freely with weeds. Reducing weed light interception as well as nitrogen fertilization, and consequently reducing the competitive ability of the weed, favored the establishment of P. maximum in diversified agro-ecosystems.

scholarly journals Effect of Trinexapac-ethyl associated with nitrogen fertilization on upland rice nutritional status and grain yield

2020 ◽  
Vol 9 (11) ◽  
pp. e6779119409
Author(s):  
Samuel Ferrari ◽  
Luis Fernando dos Santos Cordeiro ◽  
Luís Guilherme Delovo Carara ◽  
Vagner do Nascimento ◽  
Paulo Renato Matos Lopes ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Rice Yield ◽  
Upland Rice ◽  
Block Design ◽  
Phenological Stages ◽  
Nitrogen Rate ◽  
Randomized Block Design ◽  
Floral Differentiation ◽  
Nitrogen Rates

Trinexapac-ethyl spraying time and proper nitrogen rate are essential to reduce plant height and lodging at harvest, without affecting rice yield and nutritional balance. This study aimed to evaluate trinexapac-ethyl spraying time and N contents as topdressing for upland rice paddies. The experiment was carried out in a randomized block design and a 4x5 factorial scheme, with four replications. Treatments consisted of four trinexapac-ethyl spraying times, in the phenological stages of tillering, floral differentiation, between tillering and floral differentiation, and a control (without spraying), and five nitrogen rates (0, 50, 100, 150, and 200, kg ha-1) as topdressing. As nitrogen topdressing rates increased, leaf contents of N, Fe++, and Zn++ increased, while S and Mn++ decreased; however, contents of P, Ca++, Mg++, B, and Cu++ were little influenced. When trinexapac-ethyl was applied, leaf contents of N, P, S, B, and Zn++ were little influenced, while P, Ca++, Mg++, Fe++, and Mn++ increased, and Cu++ decreased. Trinexapac-ethyl can be applied at tillering without decreasing rice yield. Upland rice increased grain yield by 58 and 46% in two consecutive crop years due to application of about 120 kg N ha-1 as topdressing.

scholarly journals Yield performance of taro (Colocasia esculenta L.) cultivated with topdressing nitrogen rates at the Zona da Mata region of Minas Gerais

Revista CERES ◽  
2016 ◽  
Vol 63 (6) ◽  
pp. 887-892
Author(s):  
Sanzio Mollica Vidigal ◽  
Iza Paula de Carvalho Lopes ◽  
Mário Puiatti ◽  
Maria Aparecida Nogueira Sediyama ◽  
Marcelo Resende de Freitas Ribeiro
Keyword(s):  
Nitrogen Fertilization ◽  
Block Design ◽  
Maximum Yield ◽  
Time Of Application ◽  
Randomized Block Design ◽  
The Subject ◽  
The Difference ◽  
Almost All ◽  
N Rates ◽  
Nitrogen Rates

ABSTRACT Response of taro to amount of nitrogen applied and time of application has been the subject of discussion. The objective of this study was to evaluate the effect of nitrogen topdressing on taro yield. Two experiments were conducted in Oratórios - MG from September 2010 to July 2011 (Year 1) and from September 2011 to July 2012 (Year 2). Both experiments were arranged in a randomized block design, with four replications. The treatments consisted of five N rates (0; 40; 60; 80 and 160 kg ha-1) applied as topdressing at urea form. The corms of Japanese clone (BGH 5925) were planted in the 0.90 x 0.30 m spacing. In the two experimental years, yield increased in almost all corm classes with the increase in N rates. The estimated maximum yields of marketable corms were 22.23 Mg ha-1 in Year 1 and 9.81 Mg ha-1 in Year 2, with 109 and 118 kg ha-1 of N, respectively. The total number of corms per plant was similar in both years (16.45 corms/plant in Year 1 and 17.76 corms/plant in Year 2). Unmarketable corms represented 35.32 and 46.51% of the total per plant, in Year 1 and Year 2, respectively, indicating less corm growth in Year 2. The curve of taro response to topdressing N rates was similar in the two years and, the estimates were influenced by the difference in rainfall between the years. With the management of nitrogen fertilization, the maximum yield of marketable taro corms was achieved with N rates varying from 109 to 118 kg ha-1.

scholarly journals VERMICOMPOST APPLICATION IMPROVING SEMIARID-GROWN CORN GREEN EAR AND GRAIN YIELDS

2017 ◽  
Vol 30 (3) ◽  
pp. 551-558
Author(s):  
PAULO SÉRGIO LIMA E SILVA ◽  
PAULO IGOR BARBOSA E SILVA ◽  
VIANNEY REINALDO DE OLIVEIRA ◽  
FÁBIO HENRIQUE TAVARES DE OLIVEIRA ◽  
LUCAS RAMOS DA COSTA
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Organic Fertilizer ◽  
Application Rate ◽  
Kernel Weight ◽  
Semiarid Region ◽  
Application Rates ◽  
Randomized Block Design ◽  
Brazilian Semiarid ◽  
Dose Dependent

ABSTRACT Intensive corn farming quickly depletes soil organic matter in the nutrient-poor soils of the Brazilian semiarid region. Application of vermicompost, an excellent organic fertilizer, could help solve that problem. This study evaluated the effect of applying Eisenia fetida vermicompost in the seeding furrows, at 0, 2, 4, 6, 8, and 10 Mg.ha-1 application rates, on the green ear yield and grain yield of two corn cultivars. Treatments were replicated five times with split-plots (vermicompost application rates within plots) in a completely randomized block design. The number of mature ears, number of kernels per ear (cultivar BR 106), and 100-kernel weight (cultivar AG 1051) were not affected by vermicompost application rate. However, vermicompost application increased total number and weight of unhusked and husked marketable green ears as well as grain yield. Total number of green ears was higher in cultivar BR 106 than in cultivar AG 1051. Conversely, grain yield and total ear weight and marketable weight of unhusked and husked green ears was higher in cultivar AG 1051, but responses in the latter two traits were dose-dependent.

scholarly journals Production components of sunflower plants irrigated with treated domestic wastewater and drinking water in semiarid region

Revista CERES ◽  
2019 ◽  
Vol 66 (1) ◽  
pp. 34-40
Author(s):  
Daniel da Costa Dantas ◽  
Ênio Farias de França e Silva ◽  
Mario Monteiro Rolim ◽  
Manassés Mesquita da Silva ◽  
José Edson Florentino de Morais ◽  
...  
Keyword(s):  
Drinking Water ◽  
Oil Content ◽  
Block Design ◽  
Domestic Wastewater ◽  
Uasb Reactor ◽  
Semiarid Region ◽  
Internal Diameter ◽  
Crop Evapotranspiration ◽  
Randomized Block Design ◽  
Crop Cycle

ABSTRACT This study aimed to evaluate production components of sunflower (Helianthus annuus L.) plants irrigated with domestic wastewaters treated by different processes, with two irrigation depths. The experiment was carried out in Ibimirim, state of Pernambuco, Brazil, using a randomized block design in a 4×2 factorial arrangement, with four replications. The treatments consisted of four irrigation water types (domestic wastewater treated by UASB reactor - DW1; domestic wastewater treated by digestion decanter and anaerobic filtration - DW2; domestic wastewater treated by anaerobic filtration - DW3; and public water - PW4) and two irrigation depths (equal to the crop evapotranspiration - ID1; and 20% higher than the crop evapotranspiration - ID2). The production components-plant fresh and dry weights, 1000-achene weight, capitulum internal diameter, achene yield, oil content, and oil yield-were evaluated at the end of the crop cycle. The irrigation with treated domestic wastewater improved all variables analyzed when compared to the drinking water, especially when using DW2 and DW3 with ID1.

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