scholarly journals ESTRATÉGIAS DE IRRIGAÇÃO COM DÉFICIT HÍDRICO NOS ESTÁDIOS FENOLÓGICOS DO FEIJÃO-CAUPI SOB ADUBAÇÃO POTÁSSICA

Irriga ◽  
2021 ◽  
Vol 26 (1) ◽  
pp. 111-122
Author(s):  
Lauriane Almeida dos Anjos Soares ◽  
Thamara Layse Freitas Medeiros ◽  
Victoria Cristina Gomes Colman ◽  
Irlan Victor de Sousa Palmeira ◽  
Idelvan José da Silva ◽  
...  
Keyword(s):  
Water Deficit ◽  
Vigna Unguiculata ◽  
Arid Regions ◽  
Block Design ◽  
Management Strategies ◽  
Phenological Stages ◽  
Randomized Block Design ◽  
Management Of Resources ◽  
Pod Length ◽  
E Mail

ESTRATÉGIAS DE IRRIGAÇÃO COM DÉFICIT HÍDRICO NOS ESTÁDIOS FENOLÓGICOS DO FEIJÃO-CAUPI SOB ADUBAÇÃO POTÁSSICA     LAURIANE ALMEIDA DOS ANJOS SOARES1; THAMARA LAYSE FREITAS MEDEIROS2; VICTORIA CRISTINA GOMES COLMAN3; IRLAN VICTOR DE SOUSA PALMEIRA4; IDELVAN JOSÉ DA SILVA5 E ROMULO CARANTINO LUCENA MOREIRA6   1 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 2 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 3 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 4 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 5 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected] 6 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected]     1 RESUMO   Palavras-chave: Vigna unguiculata L., tolerância à seca, nutrição mineral     SOARES, L. A. dos A.; MEDEIROS, T. L. F.; COLMAN, V. C. G.; PALMEIRA, I. V. de S.; SILVA, I. J. da; MOREIRA, R. C. L. IRRIGATION STRATEGIES WITH WATER DEFICIT IN THE PHENOLOGICAL STAGES OF THE COWPEA UNDER POTASSIC FERTILIZATION     2 ABSTRACT   In semi-arid regions, water deficiency is the main environmental factor that influences the yield of plants, in these regions the proper management of resources is essential in order to guarantee the sustainability of the production system. Thus, this study aimed to evaluate the morphology and phytomass partition of cowpea (Vigna unguiculata L.), to cultivate BRS Marataoã, when submitted to water deficit management strategies in different phenological stages of the crop and fertilization doses potassium. A randomized block design was used, in a 5 x 5 factorial scheme, with three replications, with the treatments being defined according to the five potassium fertilization doses (50, 75, 100, 125, and 150% of K2O) associated with five water deficit management strategies at the different phenological stages of the crop. The application of water deficit associated with potassium doses favored the growth and accumulation of phytomass in the flowering phase. Increasing doses of potassium when associated with water deficit in the flowering and fruiting stages compromise the number of pods and pod length. In the early stages of the development of cowpea, irrigation with water deficit can be applied without significant losses in the production components.   Keywords: Vigna unguiculata L., drought tolerance, mineral nutrition

scholarly journals COMPORTAMENTO FISIOLÓGICO DE MUDAS DE CAFEEIRO ARÁBICA (cv. OBATÃ E CATUCAÍ) SUBMETIDAS À DEFICIÊNCIA HÍDRICA

Irriga ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 890-899
Author(s):  
ENRIQUE ALONSO ZUÑIGA ◽  
LUZ MARIA RUIZ MACHUCA ◽  
OSVALDIR FELICIANO DOS SANTOS ◽  
MARA LÚCIA CRUZ DE SOUZA ◽  
DARIANE PRISCILA FRANCO DE OLIVEIRA ◽  
...  
Keyword(s):  
Leaf Area ◽  
Chlorophyll Content ◽  
Plant Height ◽  
Water Deficit ◽  
Coffea Arabica ◽  
Block Design ◽  
Field Capacity ◽  
Randomized Block Design ◽  
Severe Water Deficit ◽  
E Mail

COMPORTAMENTO FISIOLÓGICO DE MUDAS DE CAFEEIRO ARÁBICA (cv. OBATÃ E CATUCAÍ) SUBMETIDAS À DEFICIÊNCIA HÍDRICA     ENRIQUE ALONSO ZUÑIGA1*; LUZ MARIA RUIZ MACHUCA1; OSVALDIR FELICIANO DOS SANTOS1; MARA LÚCIA CRUZ DE SOUZA1; DARIANE PRISCILA FRANCO DE OLIVEIRA1 E FERNANDO BROETTO 2   1Departamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista (UNESP) Campus de Botucatu. Fazenda Experimental Lageado, Avenida Universitária, n° 3780, Altos do Paraíso, CEP: 18610-034, Botucatu – SP. Brasil. E-mail: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]. *O presente artigo é retirado da tese de Doutorado do autor principal. 2Departamento de Química e Bioquímica, Instituto de Biociências , Universidade Estadual Paulista (UNESP) Campus de Botucatu. Rua Prof. Dr. Antônio Celso Wagner Zanin, nº 250, Distrito de Rubião Junior, CEP: 18618-689, Botucatu – SP. Brasil. E-mail: [email protected]     1 RESUMO   Neste trabalho foram avaliadas características biométricas e teor de pigmentos em plantas de cafeeiro arábica cv. Obatã e Catuaí cultivadas sob deficiência hídrica (DH). O experimento foi conduzido em estufa agrícola no período dezembro-maio de 2016-2017 no distrito de Rubião Júnior (Departamento de Química e Bioquímica do IB/UNESP), Botucatu-SP. Os tratamentos foram dispostos em delineamento em blocos casualizados em esquema fatorial 3x2 em parcelas subdivididas, com quatro repetições por tratamento. Os tratamentos aplicados foram: T1 - 100% da capacidade de campo (CC) - C = Controle, plantas bem irrigadas, T2 - 50% da CC - DHM = Deficiência hídrica moderada e T3 - 25% da CC - DHS = Deficiência hídrica severa. Aos 90, 120, 135 e 165 dias após transplantio (DAT) foram avaliados a altura de plantas, área foliar e teor de clorofilas (a e b). Verificou-se que apenas a altura das plantas e a área foliar diminuíram significativamente em função da severidade do estresse. Entre as cultivares, somente as plantas da cv. Obatã conseguiram se adaptar melhor aos efeitos da DH.   Palavras-chave: Coffea arabica, deficiência hídrica, biometria, pigmentos foliares.     ALONSO-ZUÑIGA, E; RUIZ-MACHUCA, L. M; SANTOS, O. F; SOUZA, M. L. C; OLIVEIRA, D. P. F; BROETTO, F. PHYSIOLOGICAL BEHAVIOR OF ARABIC COFFEE SEEDLINGS (cv. OBATÁ AND CATUCAÍ) SUBMITTED TO WATER DEFICIT     2 ABSTRACT   In this work, biometric characteristics and pigment content were assessed in Arabica cv. Obatã and Catuaí cultivated under water deficit (WD). The experiment was conducted in an agricultural greenhouse from December to May, 2016-2017 in the district of Rubião Júnior (Department of Chemistry and Biochemistry of IB / UNESP), Botucatu-SP. Treatments were arranged in a randomized block design in a 3x2 factorial scheme in subdivided plots, with four replications per treatment. The treatments applied were: T1 - 100% of field capacity (FC) - C = Control, well irrigated plants, T2 - 50% of FC - MWD = moderate water deficit and T3 - 25% FC - SWD = severe water deficit. Plant height, leaf area and chlorophyll content (a and b) were assessed at 90, 120, 135 and 165 days after transplanting (DAT). It was verified that only plant height and leaf area decreased significantly as function of stress severity. Among the cultivars, only cv. Obatã presented better adaptation to the effects of WD. Keywords: Coffea arabica, water deficit, biometry, foliar pigments

scholarly journals RENDIMENTO DE ROSAS CULTIVADAS EM AMBIENTE PROTEGIDO SOB DIFERENTES NÍVEIS DE IRRIGAÇÃO

Irriga ◽  
2018 ◽  
Vol 21 (1) ◽  
pp. 14
Author(s):  
Eduardo Carvalho Oliveira ◽  
Jacinto De Assunção Carvalho ◽  
Elka Fabiana Aparecida Almeida ◽  
Fátima Conceição Rezende ◽  
Simone Novaes Reis ◽  
...  
Keyword(s):  
Water Deficit ◽  
Block Design ◽  
Irrigation Management ◽  
Agricultural Practices ◽  
Water Deficit Stress ◽  
Cut Flowers ◽  
Water Pumping ◽  
Randomized Block Design ◽  
Biometric Quality ◽  
E Mail

RENDIMENTO DE ROSAS CULTIVADAS EM AMBIENTE PROTEGIDO SOB DIFERENTES NÍVEIS DE IRRIGAÇÃO  EDUARDO CARVALHO OLIVEIRA1; JACINTO DE ASSUNÇÃO CARVALHO1; FÁTIMA CONCEIÇÃO REZENDE1; ELKA FABIANA APARECIDA ALMEIDA2; SIMONE NOVAES REIS2 E SÔNIA NAOMI MIMURA2 1Universidade Federal de Lavras, Departamento de Engenharia, Campus Universitário, Caixa Postal 3037, CEP 37200-000, Lavras, MG. e-mail: [email protected], [email protected], [email protected] de Pesquisa Agropecuária de Minas Gerais, Unidade Regional EPAMIG Sul de Minas, Av. Visconde do Rio Preto, s/n, Vila São Paulo, CEP: 36.301-360, São João Del Rei, MG. e-mail: [email protected], [email protected], [email protected]  1 RESUMO A floricultura de corte tem nas rosas a sua principal exploração no Brasil e possui vasta demanda por pesquisas voltadas à produtividade e qualidade de hastes florais associadas ao adequado manejo da irrigação. Além disso, o manejo correto da irrigação está relacionado à utilização de práticas agrícolas adequadas, as quais se justificam com a redução de insumos como água, energia de bombeamento e fertilizantes. Assim, este trabalho objetivou avaliar o efeito de diferentes potenciais de água no solo sobre o rendimento e qualidade biométrica de hastes de rosas. O experimento foi realizado em casa de vegetação localizada na EPAMIG, em São João Del Rei - MG. Foi utilizado um delineamento em blocos casualizados, envolvendo seis potenciais de água no solo (-15, -30, -45, -60, -90 e -120 kPa) com cinco repetições. Os parâmetros avaliados foram: produtividade, comprimento e diâmetro das hastes e comprimento e diâmetro do botão floral. De forma geral, o déficit hídrico de até -120 kPa não interfere nas características qualitativas das hastes florais. Maiores produtividades são observadas para irrigações mais frequêntes, com -15 e -30 kPa.   Palavras-chave: floricultura, roseira, qualidade, manejo da irrigação, déficit hídrico.  OLIVEIRA, E. C.; CARVALHO, J. de A.; REZENDE, F. C.; ALMEIDA, E. F. A.; REIS, S. N.; MIMURA, S. N.ROSE YIELD CULTIVATED IN PROTECTED ENVIRONMENT UNDER DIFFERENT IRRIGATION LEVELS  2 ABSTRACT Roses lead exploitation of cut flowers in Brazil and demand. The present research focused on flower stems productivity and quality associated to adequate irrigation management. Moreover, the correct management of irrigation is related to the use of appropriate agricultural practices, which are justified by reducing inputs such as water, pumping energy and fertilizers. This work had the aim of assessing the effect of water deficit stress across different soil water potentials on yield and biometric quality of stems roses. The experiment was conducted in a greenhouse located at EPAMIG, São João Del Rei, MG. A randomized block design involving six water potential on soil (-15, -30, -45, -60, -90 and -120 kPa) with five replications was used. Parameters assessed were: yield, length and diameter of the stems, length and diameter of the rose bud. In general, the water deficit of up to -120 kPa does not interfere with qualitative parameters of the stem buds. Higher yields are observed for more frequent irrigations, with -15 and -30 kPa. Keywords: floriculture, rosebush, quality, irrigation management, water deficit. 

scholarly journals Effects of glycine betaine on plant growth and performance of Medicago sativa and Vigna unguiculata under water deficit conditions

1970 ◽  
pp. 1-8
Author(s):  
Hanan Kamal Khadouri ◽  
Karthishwaran Kandhan ◽  
Mohammed Abdul Salem
Keyword(s):  
Drought Stress ◽  
Medicago Sativa ◽  
Water Deficit ◽  
Vigna Unguiculata ◽  
Glycine Betaine ◽  
Growth Parameters ◽  
Block Design ◽  
Foliar Spray ◽  
Mineral Nutrients ◽  
Randomized Block Design

Managing water consumption of the crops is one of the strategies which have been adopted locally and worldwide in current trends of sustainable agriculture. In addition to the low level of water resources in UAE because of the rare precipitation, no fresh, free-flowing water, rivers, lakes or streams. The present study was aimed to evaluate the effects of exogenous Glycine Betaine (GB) on Alfalfa (Medicago sativa) and Cowpea (Vigna unguiculata) within different levels of drought stress. A pot experiment was designed on a completely randomized block design (CRBD) with three replicates. Exogenous GB was applied as a foliar spray in three levels (0,100 and 200 ppm) five times with five days intervals. Drought stress starts within the second GB treatment in three levels (24h: 100% well-watered), (48h: 60% water deficit) and (72h: 40% water deficit) depending on the required quantity. Growth characteristics, pigment concentrations, biochemical content and Mineral nutrients levels were measured in response to the treatment variables. Results showed that the GB has a significant increment in Growth parameters, biochemical contents, and Mineral nutrients concentrations. The results of the present investigation suggested that the exogenous application of GB was improved the drought tolerance in Cowpea and has enhanced the Alfalfa performance under drought stress in both concentrations 100 and 200 ppm under drought stress of 60% of irrigations water.  In due of comparison of Cowpea and Alfalfa, it’s found from this study that GB has a better effect on the Cowpea under drought stress than Alfalfa.

scholarly journals Accumulation of macronutrients in cowpea and weeds in competition and under soil water deficit

2019 ◽  
Vol 35 (6) ◽  
Author(s):  
Fernando Sarmento de Oliveira ◽  
Erivanessa Costa Sousa Sarmento ◽  
Jeferson Luiz Dallabona Dombroski ◽  
Daniel Valadão Silva ◽  
Claudia Daianny Melo Freitas ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Deficit ◽  
Plant Species ◽  
Vigna Unguiculata ◽  
Block Design ◽  
High Potential ◽  
Soil Water Deficit ◽  
Commelina Benghalensis ◽  
Randomized Block Design ◽  
Nutrient Extraction

The ability of a plant species to succeed in colonization of agroecosystem depends on its efficiency in the use of growth resources even in deficient conditions. The present study aimed to evaluate the effects of competition and water deficit in the soil on the accumulation of macronutrients of Vigna unguiculata L. Walp., Commelina benghalensis L. and Waltheria indica L. The study was conducted in a greenhouse, in randomized block design, with four replications. The treatments were arranged in a 5 × 2 factorial, with the first factor corresponding to types of interaction among species (V. unguiculata + C. benghalensis; V. unguiculata + W. indica; V. unguiculata in monoculture, C. benghalensis in monoculture and W. indica in monoculture), and the second of water regimes (irrigated and water deficit). The water deficit differently affects macronutrient content on the species, with decreased of K, Ca and Mg in cowpea, and N, P, K and Ca in W. indica. For C. benghalensis, the water deficit does not reduce the macronutrient contents on the plant. The competition between plants intensifies the effects of water deficit only on C. benghalensis, with a decreased on the content of all macronutrients studied. Under irrigated conditions, competition between plants was more damaging the weeds compared to cowpea. The C. benghalensis specie, free from interference, has a high potential for nutrient extraction under irrigated and water deficit regimes.

scholarly journals Cowpea subjected to organic fertilization and management of the natural vegetation of the savannah of Roraima

2021 ◽  
Vol 15 ◽  
Author(s):  
Djair Alves De Melo ◽  
Tocio Sediyama ◽  
Antonio Alberto Da Silva ◽  
José Maria Arcanjo Alves ◽  
José De Anchieta Alves de Albuquerque ◽  
...  
Keyword(s):  
Experimental Design ◽  
Plant Height ◽  
Vigna Unguiculata ◽  
Yield Components ◽  
Block Design ◽  
Natural Vegetation ◽  
Organic Fertilization ◽  
Randomized Block Design ◽  
Set Up ◽  
Pod Length

Cowpea (Vigna unguiculata (L.) Walp.) is one of the main sources of nutrients for a large part of the population. To increase your income, there is a need for proper management. This study aimed to evaluate yield components of the cowpea cultivar Aracê subjected to two levels of organic fertilization and three management of the natural vegetation of the savannah of Roraima. The experiment was set up in the experimental area of CCA/UFRR, in Boa Vista, Roraima. The experimental design was a randomized block design in a 3×2 factorial scheme, with four replications. The first factor consisted of the management of the natural vegetation: glyphosate application and cutting or not of the natural vegetation. The second factor consisted of the application or not of cattle manure. Yield components were plant height, number of trifoliate leaves, percentage of normal pods, pod length, number of grains per pod, 100-grain weight, sample grain index, total grain index, and final stand. Organic fertilization with 2 L m-2 of manure increased cowpea production. The management with vegetation cutting in areas with organic fertilization increased the final stand of cowpea plants. The desiccation of natural vegetation with glyphosate was the management that had the highest cowpea production.

scholarly journals Effect of Foliar Application of Methanol on Changes of Antioxidant Enzymes of Vigna unguiculata L. in Water-Deficit Stress

2019 ◽  
Vol 39 (04) ◽  
Author(s):  
Aliakbar Saneienejad ◽  
Mahmood Tohidi ◽  
Behnam Habibi Khaniani ◽  
Mehdi Sadeghi
Keyword(s):  
Antioxidant Enzymes ◽  
Water Deficit ◽  
Vigna Unguiculata ◽  
Foliar Application ◽  
Block Design ◽  
Water Deficit Stress ◽  
Methanol Treatment ◽  
Randomized Block Design ◽  
Four Levels ◽  
Plot Design

The aim of this study was to investigate the effect of foliar application of methanol on the activity of antioxidant enzymes of Vigna unguiculata L. in water-deficit stress conditions. The trials were performed in a split plot design arranged in completely randomized block design with three replications in two years cultivation (2017 and 2018). Water-deficit stress treatments were considered in the main plots in four levels (25, 50, 75 and 100% of plant water requirement) and combined foliar application of methanol treatment in three levels (control, 10 and 20% vol.), and genotype treatment in two cultivars of Omidbakhsh 1057 and Mashhad in sub plots. The results showed that the effect of water-deficit stress and foliar application of methanol on the activity of antioxidant enzymes were significant (P £ 0.01). The effect of genotype on the activity of ascorbate peroxidase was just significant (P £ 0.01).

scholarly journals Foliar silicate fertilization assessment on bean development and its water deficit stress tolerance

2021 ◽  
pp. 38-44
Author(s):  
Valeria Pohlmann ◽  
Bruno Moreira Pereira ◽  
Alberto Eduardo Knies ◽  
Marcondes Lazzari ◽  
Diego Portalanza ◽  
...  
Keyword(s):  
Water Deficit ◽  
Dry Matter ◽  
Block Design ◽  
Water Deficit Stress ◽  
Water Deficiency ◽  
Related Factors ◽  
Randomized Block Design ◽  
Relative Water ◽  
Productive Potential ◽  
Pod Length

Bean’s productivity is below its productive potential, and among the related factors is the sensitivity to water deficiency. Silicate fertilization may aid to better tolerate this abiotic stress. Therefore, this work aims to evaluate the effects of foliar silicon (Si) doses in the development and tolerance of water deficiency for the bean’s cultivation. The experiment was conducted in a greenhouse, with a completely randomized block design in a 6x2 factorial scheme with four repetitions. Six doses of silicon (0; 0.5; 1.0; 1.5; 2.0; 2.5 kg Si ha-1) with and without water deficiency in flowering were used. The pots with a capacity of 2 L were filled with dystrophic Red Argisol, and they were maintained with automatic irrigation. The leaf temperature (TF) was analyzed daily, and at the end of the cycle, the plants’ height, aerial and root fresh and dry matter, the number of grains per plant, the number of grains per pod, the number of pods per plant, pod length, and grain fresh and dry matter were determined. After water deficit stress, the percentage of absolute integrity and relative water capacity were determined. The water condition reflected differences in plant height, grain dry matter, number of grains per plant, pods per plant, and the foliar temperature. The silicon doses did not influence the development and tolerance to water deficit for the bean culture.

scholarly journals Photosynthetic efficiency and production of cowpea cultivars under deficit irrigation

2018 ◽  
Vol 13 (5) ◽  
pp. 1 ◽  
Author(s):  
Alberto Soares de Melo ◽  
Allisson Rafael Ferreira da Silva ◽  
Alexson Filgueiras Dutra ◽  
Wellison Filgueiras Dutra ◽  
Marcos Eric Barbosa Brito ◽  
...  
Keyword(s):  
Water Deficit ◽  
Deficit Irrigation ◽  
Photosynthetic Efficiency ◽  
Arid Regions ◽  
Carbon Fixation ◽  
Management Strategies ◽  
Carbon Assimilation ◽  
Green Beans ◽  
Gas Exchanges ◽  
Cowpea Cultivars

Cowpea is a crop with great economic, social and food importance in semi-arid regions, but its production is drastically reduced by the water deficit in these regions, requiring better management strategies that allow the crop’s production. This study therefore aimed to evaluate the photosynthetic efficiency and production of cowpea cultivars under deficit irrigation replacement levels. The experiment tested three cowpea genotypes (G1 = ‘BRS Aracé’, G2 = ‘BR 17 Gurguéia’ and G3 = ‘BRS Marataoã’) and four irrigation depths (40, 60, 80 and 100% of ETc), resulting in a 3 x 4 factorial scheme, arranged in randomized complete blocks design with four replicates. During the experiment, the gas exchanges, chlorophyll a fluorescence and production of the cowpea genotypes under deficit irrigation were evaluated. Carbon fixation in the photosynthetic metabolism of cowpea plants was reduced by accentuated water deficit, regardless of the genotype. The low stress severity was indicated by the lack of effects on chlorophyll fluorescence, indicating that the reduction in the rate of carbon assimilation was due to the stomatal effects. The irrigation with 80% of ETc can be used in the cultivation of the respective cultivars, but with small losses in the production. Among the genotypes, ‘BRS Marataoã’ stands out with respect to yield, with higher values for weight of pods and green beans.

scholarly journals Cycle pruning programmed on the grain yield of arabica coffee

2019 ◽  
Vol 43 ◽  
Author(s):  
Diego Corona Baitelle ◽  
Abraão Carlos Verdin Filho ◽  
Sílvio de Jesus Freitas ◽  
Guilherme Bessa Miranda ◽  
Henrique Duarte Vieira ◽  
...  
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Production Capacity ◽  
Additional Treatment ◽  
Control Treatment ◽  
Arabica Coffee ◽  
Randomized Block Design ◽  
Canopy Area ◽  
Plagiotropic Branches ◽  
Productive Development

ABSTRACT The cycle pruning programmed is a reinvigoration technique widely employed in Conilon coffee. This strategy may also be adopted for Arabica coffee to increase its crop longevity and yield. In this scenario, the present study proposes to examine the influence of the cycle pruning programmed on the vegetative and productive development of Arabica coffee. The experiment was developed in the field as a randomized-block design with four replicates. Treatments were tested in a 4 × 2 factorial arrangement consisting of four stem densities (4000, 8000, 12000 or 16000 stems ha-1) and two management strategies for the removal of plagiotropic branches (annual or biennial removal of branches which had reached 70% or more of their production capacity). For some variables, the treatments were organized as a 4 × 2 × 2 factorial arrangement in which the last factor corresponded to two regions of data collection in the plant (upper or lower). For all factorial arrangements, an additional treatment (control) was employed corresponding to traditional pruning (recepa). Annual or biennial removal of plagiotropic branches which had attained 70% or more of their production capacity can be adopted with no losses to crop yield. The cycle pruning programmed improves the distribution of branches, increases canopy area and prevents the occurrence of the “naked neck” phenomenon, observed in control treatment. Additionally, it provides better agronomic and productive performance; therefore, it can be used as a substitute for recepa.

scholarly journals COBERTURA NITROGENADA EM DIFERENTES ESTÁDIOS FENOLÓGICOS DO FEIJOEIRO COMUM ALTERA PRODUTIVIDADE E QUALIDADE DE GRÃOS

Nativa ◽  
2019 ◽  
Vol 7 (6) ◽  
pp. 636
Author(s):  
Gabriel Pereira Nogueira ◽  
Mateus Sebastião Gonçalves Da Silva ◽  
Fábio Tiraboschi Leal ◽  
Rogério Farinelli ◽  
Fábio Luiz Checchio Mingotte ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Grain Yield ◽  
Common Bean ◽  
Block Design ◽  
Phenological Stages ◽  
Agronomic Efficiency ◽  
Randomized Block Design ◽  
Soil Preparation ◽  
Grain Yield And Quality ◽  
Qualitative Performance

A necessidade de conhecer a marcha de absorção do nitrogênio (N) pelo feijoeiro é importante para compreender os desempenhos produtivo e qualitativo dessa cultura.  O objetivo deste estudo foi avaliar a influência da cobertura nitrogenada em função de diferentes estádios fenológicos no desempenho morfoagronômico e produtivo e nas características tecnológicas dos grãos do feijoeiro em sistema de plantio convencional. Utilizou-se o delineamento de blocos casualizados, com quatro repetições. Os tratamentos foram constituídos por doze combinações de fornecimento de N (FN) em cobertura (dose total = 90 kg ha-1 de N) aplicadas nos estádios fenológicos V3, V4 e R5 (V3+V4+R5) do feijoeiro de inverno irrigado: 00+00+00; 30+30+30; 30+60+00; 30+00+60; 60+30+00; 00+60+30; 45+45+00; 00+45+45; 45+00+45; 90+00+00; 00+90+00; e 00+00+90. A fonte de N utilizada foi ureia convencional. Os FN 30+00+60, 00+45+45 e 45+00+45 incrementam a produtividade de grãos e a eficiência agronômica em relação à ausência de N e à aplicação de dose única no estádio fenológico V4. do feijoeiro comum. As maiores produtividades de proteína bruta e o menor tempo para cozimento foram proporcionadas pelos FN 00+45+45, 45+00+45, 90+00+00, 00+90+00 e 00+00+90.Palavras-chave: Phaseolus vulgaris; parcelamento do N; eficiência agronômica; tecnologia dos grãos. NITROGEN TOPDRESSING AT DIFFERENT PHENOLOGICAL STAGES ON COMMON BEAN CHANGES GRAIN YIELD AND QUALITY ABSTRACT: The need to know the nitrogen uptake (N) by common bean is important to understand the productive and qualitative performance of this crop. The objective of this study was to evaluate the influence of nitrogen topdressing as a function of different phenological stages on the morphometric and productive performance, and on the technological characteristics of the bean grains grown under conventional soil preparation. A randomized block design with four replications was used. The treatments were constituted by twelve topdressing N supply combinations (NS) (total dose = 90 kg ha-1 N) applied in the phenological stages V3, V4 and R5 (V3+V4+R5) of irrigated winter bean: 00+00+00; 30+30 +30; 30+60+00; 30+00+60; 60 + 30 + 00; 00+60+30; 45+45+00; 00+45+45; 45+00+45; 90+00+00; 00+90+00; and 00+00+90. The source of N used was conventional urea. NS 30 + 00 + 60, 00 + 45 + 45 and 45 + 00 + 45 increase grain yield and agronomic efficiency in relation to the absence of N and single dose application at V4 phenological stage of common bean. The highest crude protein yields and the shortest cooking time were provided by FN 00+45+45, 45+00+45, 90+00+00, 00+90+00 and 00+00+90.Keywords: Phaseolus vulgaris; N splitting; agronomic efficiency; grains technology. 

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