Marcha de absorção do nitrogênio do solo, do fertilizante e da fixação simbiótica em feijão-caupi (Vigna unguiculata (L.) walp.) e feijão-comum (Phaseolus vulgaris L.) determinada com uso de 15N

Brito, Marciano; Muraoka, Takashi; Silva, Edson Cabral da

doi:10.1590/s0100-06832009000400014

Cited by 27 publications

(24 citation statements)

References 25 publications

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“…According to Brito et al (2009), the largest proportion of N absorbed by common bean (around 80 %) was derived by symbiotic fixation, and the highest rate of N symbiotic fixation occurred at the pre-flowering stage. Haag et al (1967) found that Mg was absorbed up to 70 DAE, i.e., a similar period as observed in this study (Figure 6d).…”

Section: Resultsmentioning

confidence: 99%

Nutrient extraction and exportation by common bean cultivars under different fertilization levels: I - macronutrients

Soratto

Fernandes²,

Santos³

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYThe use of cultivars with a higher yield potential and the adoption of new technology have achieved high grain yields in common bean, which probably changed the demand for nutrients in this crop. However, there is almost no information about the periods of the cycle in which nutrients are most demanded at which quantities by the main cultivars. The objective of this study was to evaluate the macronutrient extraction and exportation by the common bean cultivars Pérola and IAC Alvorada, under different levels of NPK fertilization, on a dystroferric Red Nitosol, in Botucatu, São Paulo State, Brazil. The experiment was arranged in a randomized complete block (split plot) design with four replications. The plots consisted of six treatments based on a 2 x 3 factorial model, represented by two cultivars and three NPK levels (PD0 -'Pérola' without fertilization, PD1 -'Pérola' with 50 % of recommended fertilization, PD2 -'Pérola' with 100 % of recommended fertilization, AD0 -'IAC Alvorada' without fertilization, AD1 -'IAC Alvorada' with 50 % of recommended fertilization, and AD2 -'IAC Alvorada' with 100 % of recommended fertilization) and subplots sampled seven times during the cycle. At higher levels of NPK fertilization, the grain yield and macronutrient extraction and exportation of both cultivars were higher, but without statistical differences. Macronutrient absorption was higher in the treatments with 100 % of recommended NPK fertilization (average amounts per hectare: 140 kg N, 16.5 kg P, 120 kg K, 69 kg Ca, 17.9 kg Mg, and 16.3 kg S). Regardless of the treatment, the demand for N, P, K, Ca, and Mg was highest from 45 to 55 days after emergence (DAE), i.e., in the R 7 stage (pod formation), while the highest S absorption rates were concentrated between 55 and 65 DAE. More than 70 % of P, between 58 and 69 % of N, 40 and 52 %

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Section: Resultsmentioning

confidence: 99%

Nutrient extraction and exportation by common bean cultivars under different fertilization levels: I - macronutrients

Soratto

Fernandes²,

Santos³

et al. 2013

Rev. Bras. Ciênc. Solo

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“…The BNF is able to provide the necessary N for cowpea, following of a descending order by the soil and fertilizers (Brito et al, 2009). Oliveira (2003), cultivated cowpea (cv.…”

Section: Grain Yieldmentioning

confidence: 99%

Agronomic effectiveness of rhizobia strains on cowpea in two consecutive years

Xavier¹,

Runjanek²,

Santos³

et al. 2017

Aust J Crop Sci

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Cowpea (Vigna unguiculata L Walp) is a legume of great social and economic importance in tropical regions. The plant is tolerant to soil and climatic adversity, while it has high nutritional value with high protein, minerals and vitamins contents. The cowpea legume has a very high ability to fix N 2 which is important because it can reduce the costs of soluble mineral fertilizers and may contribute to sustainable agriculture, preserving the environment and natural resources. In order to observe the influence of Rhizobia the agronomic effectiveness of cowpea strains was tested in two consecutive years compared with the mineral N fertilization. The experiments were carried out in different soils of the Brazilian Northeast (semiarid and rain forest region) which measured the effectiveness of rhizobia on grain yield. The results revealed the effectiveness of strain BR 3299 in the experiment that significantly increased the grain yield (3 times when 50 kg ha -1 of N, and 2 times when 80 kg ha -1 N were used). The Rhizobia treatment promoted the grain yield (up to 1,600 kg ha -1 ), compared to application of 80 kg ha -1 of N. In general, all applied strains promoted the Brazilian Northeast average cowpea yield (300-400 kg ha -1 ).

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“…Additionally, the low recovery of the N in the fertilizers -around 50-60 % (Cantarella, 2007) -highlights the need to seek alternatives that enable the use of local inputs without affecting agricultural production (Perez et al, 2004). Thus, the use of legumes that can efficiently facilitate BNF may contribute to the economic viability and sustainability of coffee production systems by reducing the need for use of synthetic N (Brito et al, 2009;Guimarães et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Biological Nitrogen Fixation by Legumes and N Uptake by Coffee Plants

Mendonça

Lima

Guimarães

et al. 2017

Rev. Bras. Ciênc. Solo

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ABSTRACT:Green manures are an alternative for substituting or supplementing mineral nitrogen fertilizers. The aim of this study was to quantify biological N fixation (BNF) and the N contribution derived from BNF (N-BNF) to N levels in leaves of coffee intercropped with legumes grown on four family farms located in the mountainous region of the Atlantic Forest Biome in the state of Minas Gerais, Brazil. The following green manures were evaluated: pinto peanuts (Arachis pintoi), calopo (Calopogonium mucunoides), crotalaria (Crotalaria spectabilis), Brazilian stylo (Stylosanthes guianensis), pigeon pea (Cajanus cajan), lablab beans (Dolichos lablab), and velvet beans (Stizolobium deeringianum), and spontaneous plants. The experimental design was randomized blocks with a 4 × 8 factorial arrangement (four agricultural properties and eight green manures), and four replications. One hundred grams of fresh matter of each green manure plant were dried in an oven to obtain the dry matter. We then performed chemical and biochemical characterizations and determined the levels of

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Marcha de absorção do nitrogênio do solo, do fertilizante e da fixação simbiótica em feijão-caupi (Vigna unguiculata (L.) walp.) e feijão-comum (Phaseolus vulgaris L.) determinada com uso de 15N

Abstract: RESUMO(1) Recebido para publicação em dezembro de 2007 e aprovado em maio de 2009.

Cited by 27 publications

References 25 publications

Nutrient extraction and exportation by common bean cultivars under different fertilization levels: I - macronutrients

Nutrient extraction and exportation by common bean cultivars under different fertilization levels: I - macronutrients

Agronomic effectiveness of rhizobia strains on cowpea in two consecutive years

Biological Nitrogen Fixation by Legumes and N Uptake by Coffee Plants

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