Response of field-grown bean ( Phaseolus vulgaris L.) to Rhizobium inoculation and nitrogen fertilization in two Cerrados soils

2000 ◽  
Vol 32 (3) ◽  
pp. 228-233 ◽  
Author(s):  
M. A. T. Vargas ◽  
Ieda C. Mendes ◽  
Mariangela Hungria
Nativa ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 202-208
Author(s):  
Jéssica Carvalho Borges Neves ◽  
Márcio José de Santana ◽  
André Luís Teixeira Fernandes ◽  
Matheus Pereira de Assis ◽  
Jan Cornelis Van Kempen

A adubação nitrogenada e a irrigação são manejos necessários determinantes para uma boa produtividade. É necessário evitar o uso indiscriminado de adubos e dos recursos hídricos, utilizando técnicas agronômicas que diminuem os impactos socioeconômicos e ambientais. O estudo sobre a viabilidade econômica do feijoeiro é importante para definir gastos futuros, minimizar utilização de recursos naturais e aumentar a produção. O objetivo deste estudo foi avaliar economicamente a produção de feijão (cultivar BRSMG Majestoso) sob diferentes lâminas de irrigação e doses de adubação nitrogenada. O experimento foi conduzido no Instituto Federal do Triângulo Mineiro – Campus Uberaba. Foram utilizados quatro níveis de déficits de água no solo (15, 30, 45% e um fator sem déficit hídrico) e quatro doses de nitrogênio (50, 100, 150 e 200 kg ha-1), com quatro repetições, em blocos casualizados. Foram realizadas análises da eficiência econômica da lâmina de água e do custo de produção de feijão em função da adubação nitrogenada. Após estudo dos déficits, tanto a lâmina ótima econômica (446,6 mm) quanto a lâmina física (448,9 mm) encontradas, foram semelhantes e proporcionaram produtividades similares. O maior rendimento bruto foi de R$ 7.653,99 quando aplicado 100 kg ha-1 de nitrogênio. Palavras-chave: água; déficit; adubação; Phaseolus vulgaris L.; economia.   Economic viability of bean, under irrigation blades and nitrogen doses   ABSTRACT: Nitrogen fertilization and irrigation are necessary management determinants for good productivity. It is necessary to avoid the indiscriminate use of fertilizers and water resources, using agronomic techniques that reduce socioeconomic and environmental impacts. The study on the economic viability of beans is important to define future spending, minimize the use of natural resources and increase production. The objective of this study was to economically evaluate the production of beans (cultivar BRSMG Majestoso) under different irrigation depths and nitrogen fertilization doses. The experiment was conducted at the Federal Institute of Triângulo Mineiro - Campus Uberaba. Four levels of soil water deficits (15, 30, 45% and one without water deficit) and four nitrogen doses (50, 100, 150 and 200 kg ha-1) were used, with four replications, in randomized blocks. Analyzes of the economic efficiency of the water depth and the cost of bean production were carried out as a function of nitrogen fertilization. After studying the deficits, both the economic optimum blade (446.6 mm) and the physical blade (448.9 mm) found were similar and provided similar productivity. The highest gross yield was R$ 7,653.99 when 100 kg ha-1 of nitrogen was applied. Keywords: water; deficit; fertilizing; Phaseolus vulgaris L.; economy.


Author(s):  
Gerardo Mangual Crespo ◽  
Robert Kluson ◽  
Eduardo C. Schröder

The combined effect of N fertilization and Rhizobium inoculation on bean (Phaseolus vulgaris L., cv. Bonita) nodulation and yield was studied in the semi-arid southern region of Puerto Rico. Six N treatments: 0, 22, 45, 90, 180 and 360 kg/ha were tested in inoculated and noninoculated plots arranged in a split-plot design with 4 replications. The application of 22 kg/ha of N in the inoculated plots increased plant nodulation 4 and 8 weeks after planting. Higher rates of N fertilization reduced the number and size of bean nodules at both sampling dates. On the other hand, dry beans consistently increased with applications of 0 to 180 kg/ha of N in the presence of Rhizobium.


Irriga ◽  
2010 ◽  
Vol 15 (4) ◽  
pp. 386-400 ◽  
Author(s):  
Pryscilla Ferrraz Câmara Monteiro ◽  
Rubens Angulo Filho ◽  
Rodrigo Otávio Câmara Monteiro

Este trabalho teve como objetivo analisar, em condições de campo, o efeito de lâminas de irrigação e de doses de nitrogênio sobre os parâmetros biofísicos da cultura do feijoeiro. O experimento foi conduzido na área experimental da Fazenda Areão – ESALQ/USP, localizada no município de Piracicaba, SP, de setembro a dezembro de 2007, utilizando-se o cultivar de feijão Pérola. O manejo da irrigação foi feito via clima, baseado em dados obtidos da estação meteorológica localizada próxima à área experimental. O delineamento experimental foi em blocos casualizados, com parcelas subdivididas, sendo que nas parcelas foram alocados os tratamentos relacionados com os níveis de irrigação (179,5; 256,5; 357,5 e 406,2 mm) e, nas subparcelas, os tratamentos relativos às doses de nitrogênio (0; 80 e 160 kg ha-1), totalizando assim doze tratamentos em cada bloco, dispostos em 48 parcelas experimentais. As variáveis biofísicas analisadas foram: altura das plantas, índice de área foliar, produtividade de grãos, número de vagens por planta e número de grãos por vagem. O fator água influenciou todas as variáveis biofísicas, encontrando-se valores maiores nas plantas que receberam maiores quantidades de água. A adubação nitrogenada não influenciou as variáveis biofísicas da cultura do feijão.   PALAVRAS-CHAVE: Phaseolus vulgaris L., evapotranspiração, manejo de irrigação, produtividade de grãos     MONTEIRO, P.F.C.; ANGULO FILHO, R.; MONTEIRO, R.O.C. IRRIGATION AND NITROGEN FERTILIZATION EFFECTS ON BEAN  AGRONOMIC VARIABLES     2 ABSTRACT   The objective of this research was to analyze the effect of irrigation levels and nitrogen fertilization on the common bean biophysical parameters. The experiment was carried out at  the University of São Paulo (ESALQ/USP),  Piracicaba, São Paulo, Brazil, from September to December, 2007, using Perola cultivar. Irrigation schedule was based on the weather data  given  by  meteorological station located near the experimental area. The experimental design was randomized blocks, with split plots, having 12 treatments, being: 4 irrigation levels (179.5; 256.5; 357.5 e 406.2 mm) and 3 nitrogen rates (0; 80 e 160 kg ha-1);  and four repetitions, totalizing 48 plots. The biophysical variables analyzed were: plant height, leaf area index, grain yield, the pod number per plant, and the grain number per pod. The irrigation influenced the biophysical variables and the largest medium values of plants were found on those that received the largest irrigation depth. The nitrogen fertilization did not influence the biophysical variables. KEYWORDS: Phaseolus vulgaris L., evapotranspiration, irrigation management, grain yield  


2017 ◽  
Vol 44 (2) ◽  
pp. 208 ◽  
Author(s):  
Mariadaniela López ◽  
Nacira Muñoz ◽  
Hernan Ramiro Lascano ◽  
María Luisa Izaguirre-Mayoral

To simulate seed-borne virus transmission, a noninvasive protocol was designed to infect the radicle of germinating seeds, with 100% effectiveness. Preinfection of 24-h-old black bean (Phaseolus vulgaris L.) radicles by Southern bean mosaic virus (SBMV) followed by Rhizobium inoculation 48 h later caused a drastic reduction in root nodulation. Results were attributed to active virus replication within the elongating zone of the radicle at least 32 h before Rhizobium inoculation, which elicited severe anatomical malformations; an abnormal accumulation of apoplastic reactive oxygen species in the rhizodermis, cortex, inner cortical and endodermic root cells; the formation of atypical root hair tips and the collapse of 94% of the root hairs in the SBMV-preinfected radicles. Adult SBMV-preinfected plants showed exacerbated virus symptoms and 80% growth reduction ascribed to major virus-induced ultrastructural alterations in the nodules. The accumulation of ureides, α−amino acids and total reducing sugars in the leaves and nodules of SBMV-preinfected plants are indicators of the hindering effects of SBMV infection on N2 fixation and ureide catabolism, causing N starvation. The exogenous addition of 1 or 4 μM naringenin, genistein or daidzein did not counteract the deleterious effects of SBMV preinfection on nodulation.


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