Residual N and P fertilizer effect and fertilizer recovery on intercropped and sole-cropped corn and bean in semiarid northeast Brazil

Sampaio, Everardo V. S. B.; Tiessen, H.; Antonino, Antônio Celso Dantas; Salcedo, I. H.

doi:10.1023/b:fres.0000049356.83427.93

Cited by 21 publications

(11 citation statements)

References 23 publications

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“…No significant difference was observed in the subsequent crop recoveries between aerobic and flooded rice system. Similar low recoveries in succeeding crops in cropping system trials were reported by Shinde et al 1985;Shivananda et al 1996;Ichir et al 2003;Sampaio et al 2002;Dourado-Neto et al 2010 in different cropping systems. Immobilization of fertilizer N in soil organic matter that mineralizes very slow (Ichir et al 2003) and poor synchronization between mineralization of 15 N-labeled organic residue and crop uptake (Macdonald et al 2002) resulted in suppressed utilization of residual N from the previously applied N.…”

Section: Discussionsupporting

confidence: 83%

Uptake efficiency of 15N-urea in flooded and aerobic rice fields under semi-arid conditions

Kadiyala

Mylavarapu

et al. 2014

Paddy Water Environ

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The sustainability of traditional rice (Oryza sativa L.) cultivation in many Asian countries is being questioned due to severe water shortage conditions, envisaging the need for development of water-saving rice production technologies. A 2-year-field study on a typic Haplustalf soil was conducted to compare traditional transplanted rice-maize system with water-saving aerobic rice-maize system, with an overall objective of investigating the fate of fertilizer nitrogen (N) using 15 N-labeled urea. Results from the field experiments showed that the rice plants positively responded to N fertilizer application. The average fertilizer N recovery by rice crop over the 2 years in aerobic rice was 26 kg per 100 kg of applied fertilizer N in the main field and 21 kg per 100 kg of applied N in the microplot, while the recoveries were 41 and 32 kg ha-1 per 100 kg of applied N in traditionally cultivated rice under flooded conditions. The fraction of 15 N that was found in soil after the harvest of rice crop ranged from 11.4 to 47.1 kg ha-1 in aerobic rice and 14.2-51.4 kg ha-1 in flooded rice. Average recovery of 15 N fertilizer in maize after the first growing season was 3.3 %, and the corresponding recovery in soil was 19 %. An additional 1.3 % of the fertilizer was recovered by crops during the two subsequent seasons. This study indicates the need to develop management practices that improve N use efficiency in aerobic rice by reducing losses to improve yields and reduce N export to the environment.

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Section: Discussionsupporting

confidence: 83%

Uptake efficiency of 15N-urea in flooded and aerobic rice fields under semi-arid conditions

Kadiyala

Mylavarapu

et al. 2014

Paddy Water Environ

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“…Quantification of N in the straw is important, although seldom done in the region (Sampaio et al, 2004), because of its use as forage or because it is incorporated into the soil where it constitutes a net input to soil organic matter.…”

Section: Resultsmentioning

confidence: 99%

“…These inputs may be translated into significant reductions in the cost of fertilizers to intercropped crops, since they correspond from 40 up to 100% of the amounts of N in buffel grass and prickly-pear cactus produced in the systems. The incorporation of N in the agroforestry system is particularly interesting in the association with buffel grass, since pasture fertilization is almost never practiced in the region and soils tend to be deficient in this nutrient (Sampaio et al, 2004). The low productivity of cowpea and the absence of fixation by gliricidia trees in the agroforestry system resulted in a very low addition of fixed N (>1 kg ha -1 ), indicating that more research on this system is needed before it can be recommended for the region.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen symbiotically fixed by cowpea and gliricidia in traditional and agroforestry systems under semiarid conditions

Martins

Freitas

Menezes

et al. 2015

Pesq. agropec. bras.

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-The objective of this work was to estimate the amounts of N fixed by cowpea in a traditional system and by cowpea and gliricidia in an agroforestry system in the Brazilian Northeast semiarid. The experiment was carried out in a randomized complete block design, in a split-plot arrangement, with four replicates, in the semiarid region of the state of Paraíba, Brazil. Plots consisted of agroforestry and traditional systems (no trees), and split-plots of the three crops planted between the tree rows in the agroforestry system. To estimate N fixation, plant samples were collected in the fourth growth cycle of the perennial species and in the fourth planting cycle of the annual species. In the agroforestry system with buffel grass and prickly-pear cactus, gliricidia plants symbiotically fix high proportions of N (>50%) and contribute with higher N amounts (40 kg ha -1 in leaves) than in the traditional system (11 kg ha -1 in grain and 18 kg ha -1 in straw). In the agroforestry system with maize and cowpea, gliricidia plants do not fix nitrogen, and N input is limited to the fixation by cowpea (2.7 kg ha -1 ), which is lower than in the traditional system due to its lower biomass production.Index terms: Gliricidia sepium, Vigna unguiculata, biological nitrogen fixation, natural abundance, 15 N. Nitrogênio fixado simbioticamente por feijão-caupi e gliricídia em sistemas tradicional e agroflorestal sob condições semiáridasResumo -O objetivo deste trabalho foi estimar as quantidades de N fixadas em feijão-caupi em sistema tradicional e em feijão-caupi e gliricídia em sistema agroflorestal, sob condições semiáridas do Nordeste brasileiro. O experimento foi conduzido em blocos ao acaso, em arranjo em parcelas subdivididas, com quatro repetições, no semiárido da Paraíba. As parcelas consistiram dos sistemas agroflorestal e tradicional (sem árvores), e as subparcelas, dos três cultivos entre as linhas das árvores, no sistema agroflorestal. Para estimar a fixação de N, amostras das plantas foram coletadas no quarto ciclo de crescimento das espécies perenes e no quarto ciclo de cultivo das espécies anuais. No sistema agroflorestal com capim-buffel e palma forrageira, a gliricídia fixa simbioticamente altas proporções de N (>50%) e adiciona quantidades maiores de N (40 kg ha -1 nas folhas) que no sistema tradicional (11 kg ha -1 nos grãos e 18 kg ha -1 na palhada). No sistema agroflorestal com milho e feijão-caupi, a gliricídia não fixa N e a adição de N é limitada à fixação no feijão-caupi (2,7 kg ha -1 ), que é menor que no sistema tradicional em razão da sua baixa produção de biomassa.Termos para indexação: Gliricidia sepium, Vigna unguiculata, fixação biológica do nitrogênio, abundância natural, 15 N.

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“…Estratégias como o uso de resíduos orgânicos, quando disponível devem ser adotadas (Silva et al, 1999;Sampaio et al, 2004;Moreira et al, 2006;Salcedo, 2006 ) resultado dentro da faixa obtida pelos referidos autores. Na Tabela 4 é apresentada a frequência de resultados com índices negativos em relação a NCRIz calculada para as áreas de milho e feijão.…”

Section: Resultsunclassified

Níveis críticos para atributos do solo pela distribuição normal reduzida em culturas anuais de subsistência

Souza

Cavalcante

Tonucci

et al. 2014

Rev. bras. eng. agríc. ambient.

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R E S U M OObjetivou-se, neste trabalho, propor níveis críticos para atributos químicos do solo utilizando-se a distribuição normal reduzida em áreas de agricultura familiar de subsistência cultivadas com milho e feijão-caupi, no semiárido brasileiro. Amostras de solo foram coletadas em propriedades de agricultores familiares do Sertão dos InhamunsCrateús. Para a obtenção de níveis críticos foi utilizada a distribuição normal reduzida que utiliza os dados de produtividade e a relação entre produtividade e o atributo químico do solo atribuindo o nível crítico para 90% da produtividade máxima. Os níveis críticos obtidos para as áreas cultivadas com milho e feijão caupi em região semiárida são: MO (g kg -1): 7,3 e 7,5; pH: 6,6 e 6,5; P (mg dm ): 11,2 e 9,9 e saturação por base (%): 73 e 71, respectivamente. O nível crítico pela distribuição normal reduzida pode ser utilizado com vista à obtenção de níveis críticos para atributos químicos do solo. Os atributos com maior frequência para o índice negativo em relação ao nível crítico estimado (NCRIz) são Ca > V > pH > Mg > K = MO > P e V > pH > P > MO > Mg > K > Ca para as áreas de milho e feijão, respectivamente.Critical levels for soil attributes by reduced normal distribution in annual crops of subsistence A B S T R A C TThis study aimed to propose critical levels for soil chemical properties using the reduced normal distribution in areas of family subsistence farming under maize and cowpea crops in the Brazilian semiarid. Soil samples were collected on family farms in the region of Inhamuns-Cratéus. To obtain the critical levels the reduced normal distribution was used which uses the productivity data and the relationship between productivity and soil chemical attributes and assigning the critical level for 90% of the maximum. Critical levels obtained for areas cultivated with maize and cowpea in the semiarid region are: OM (g kg -1 ): 7.3 and 7.5; pH: 6.6 and 6.5; P (mg dm ): 11.2 and 9.9; and base saturation (%): 73 and 71, respectively. The critical level for reduced normal distribution can be used to obtain critical levels for soil chemical properties. The attributes most frequently for negative index over estimated critical level (NCRIz) are Ca > V > pH > Mg > K = OM > P and V > pH > P > OM > Mg > K > Ca areas for corn and cowpea, respectively. Palavras-chave:Zea mays Vigna unguiculata fertilidade do solo semiárido sertão Inhamuns-Crateús

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Residual N and P fertilizer effect and fertilizer recovery on intercropped and sole-cropped corn and bean in semiarid northeast Brazil

Cited by 21 publications

References 23 publications

Uptake efficiency of 15N-urea in flooded and aerobic rice fields under semi-arid conditions

Uptake efficiency of 15N-urea in flooded and aerobic rice fields under semi-arid conditions

Nitrogen symbiotically fixed by cowpea and gliricidia in traditional and agroforestry systems under semiarid conditions

Níveis críticos para atributos do solo pela distribuição normal reduzida em culturas anuais de subsistência

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