ACÚMULO DE NUTRIENTES E MASSA SECA PRODUZIDA POR Crotalaria juncea CULTIVADA NO CERRADO

Silva, M. S.; Oliveira, Gustavo Roberto Fonseca de; Merloti, Luís Fernando; Sá, Marco Eustáquio de

doi:10.18011/bioeng2017v11n1p26-36

Cited by 5 publications

(3 citation statements)

References 36 publications

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“…There was no significant interaction between the doses of Reactive Natural Phosphate (RNP) and the P accumulated in the green manure plants in the two years studied. The obtained results of P in the plants in the present study were higher than those found in other studies (XAVIER; OLIVEIRA; SILVA, 2017;SILVA et al, 2017), which are justified by the high production of dry mass and satisfactory weather conditions for the development of plants used as green manure (LEITE, 2018) and by the high P content in the soil (P: 37.9 mg dm -3 , Clay: 9.6%) at the beginning of the experiment.…”

Section: Resultscontrasting

confidence: 76%

Interactions Between Green Manure and Rock Phosphate on Soil Nutrient Cycling on Family Farms

Leite¹,

Couto

Blesh

2022

Rev. Caatinga

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Family farming is important for the production of food for human consumption, but it lacks resources to invest in the soil fertility of its crops. The objective of this study was to analyze whether the use of green manures increases soil fertility in terms of the nutrients N, P and K with low environmental risk for family agricultural production. An experiment was set up in the State of Mato Grosso (Brazil), in randomized complete block design, with a 6 x 3 factorial scheme, four replications, corresponding to 6 types of plants and 3 doses of phosphorus. Leguminous green manure plants were: velvet bean, Crotalaria juncea, Crotalaria ochroleuca and dwarf pigeon pea, in addition to plots with pearl millet and weedy fallow control. Rock phosphate (i.e., reactive natural phosphate) was applied as a source of phosphorus at 0, 50 and 100 kg P2O5 ha-1. The species used as green manure were cut in full bloom and the levels of N, P, K and C in plants and soil were determined. Leguminous green manure plants, after mineralization, increased the stocks of N, P and K in the soil. Crotalaria juncea was the one that reached the highest N accumulation in its constitution, being recommended in the intercropping with species with C/N ratio > 30 to minimize risks of contamination with nitrate in the soil. This work concluded that the managements with green manure plants, especially Crotalaria ochroleuca, are recommended and environmentally safe technical alternatives for family farming.

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Section: Resultscontrasting

confidence: 76%

Interactions Between Green Manure and Rock Phosphate on Soil Nutrient Cycling on Family Farms

Leite¹,

Couto

Blesh

2022

Rev. Caatinga

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“…Considering this impact of fertilizers on the total energy used in the production of soybean, one way to reduce energy expenditure during production is to increase the efficiency of crop nutrient use. The increased efficiency of P and K fertilizer used (Teixeira, Silva, Sousa, Mattiello, & Soares, 2016), and of green fertilizers that promote nutrient cycling (Silva, Oliveira, Merloti, & Sá, 2017), and rooting promotion via co-inoculation with Bradyrhizobium and Azospirillum (Ferri, Braccini, Anghinoni, & Pereira, 2017) are examples of techniques that have been indicated to increase the efficiency of P and K use by soybean and thereby to increase EE. However, in terms of energy, one should be careful if opting to replace synthetic fertilizers by other sources of these elements.…”

Section: Resultsmentioning

confidence: 99%

Energy use efficiency in soybean crops in different regions of Brazil

Guareschi

Martins

Sarkis

et al. 2020

Semina: Ciênc. Agrár.

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The soybean crop in Brazil has been growing in area and productivity in recent years and the analysis of its energy efficiency is very important to guarantee the sustainability of the production system. Assessment of energy efficiency (EE) enables the evaluation of the sustainability of agrosystems, as well as decision-making regarding the reduction in production costs and negative environmental impacts. In this context, the objective of this study was to assess energy efficiency of soybean in different regions of Brazil. For this purpose, 29 areas of soybean across the major producing states were assessed. Energy inputs and outputs of agricultural operations and/or agricultural inputs were calculated by multiplying the amount used by their calorific value or energy coefficient at each stage of production. Energy efficiency was calculated as the ratio between the total output energy and the total input energy during the production process. For every MJ of energy consumed in the production of soybean crop, 6.1; 6.7; 7.1 and 7.2 MJ of energy were produced in the form of grain, respectively in the areas assessed in the Midwest, northeast, southeast and south regions of Brazil. Generally, the main energy expenditure on soybean cultivation in different regions of Brazil was with fertilizers, seeds and herbicides. The adverse weather conditions of the year / harvest evaluated in the south-central region of Brazil resulted in low soybean yields and consequently resulted in lower energy efficiency in these regions. The evaluation of energy efficiency in soybean crops to be representative must be carried out in different regions and edaphoclimatic conditions.

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“…Destaca-se ainda que as plantas de crotalária apresentaram elevado fator de transferência de K, P e Fe, devido aos altos teores de nutrientes na parte aérea desta planta. Segundo Silva et al (2017), a crotalária é eficiente na absorção de nutrientes, mesmo em solos pobres, superando teores de nutrientes em outras leguminosas e suprindo exigências nutricionais de plantas que serão cultivadas posteriormente e/ou em consórcio.…”

Section: Tratamentounclassified

Adoção de biotecnologias para revegetação mais eficiente por feijão-de-porco e crotalária em rejeito de minério de ferro

et al. 2020

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Often unable to regenerate naturally, areas degraded by ore tailings must follow measures aimed at their environmental recovery. The revegetation and the use of bio-stimulants can contribute to the improvement of soil fertility leading to increased production of plant biomass and the cycling of nutrients between soil-plant.The objective was to evaluate the dry matter production, accumulation and nutrient export rates by pig beanplants (Canavalia ensiformis) and Crotalaria juncea cv. IAC-KR-1 as a function of the application of humic substances and diazotrophic bacteria. The experiment was conducted in a greenhouseusing iron ore tailings as substrate. An experimental design of random blocks (4x3x2) was used with four repetitions, four doses of humic substances, applied at 3 different times, with or without inoculation of diazotrophic bacteria. The supply of humic substances and mainly the inoculation in both species increased the dry matter production, reaching 70% of the average increase in pig beans. Inoculation in pig bean plants increased the absorption and transfer factor of Fe and P, and reduced the transfer factor of K, Ca and Mg, and in crotalaria plants increased the absorption of Mg, P and Mn, and reduced the absorption of Fe. The high content of Fe in mining tailings culminated in high absorption and mobilization of this element in the roots of the plants as an alternative to minimize toxic effects caused by its excess.

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ACÚMULO DE NUTRIENTES E MASSA SECA PRODUZIDA POR Crotalaria juncea CULTIVADA NO CERRADO

Cited by 5 publications

References 36 publications

Interactions Between Green Manure and Rock Phosphate on Soil Nutrient Cycling on Family Farms

Interactions Between Green Manure and Rock Phosphate on Soil Nutrient Cycling on Family Farms

Energy use efficiency in soybean crops in different regions of Brazil

Adoção de biotecnologias para revegetação mais eficiente por feijão-de-porco e crotalária em rejeito de minério de ferro

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