scholarly journals Phosphate fertilization on soils with improved fertility in the Brazilian Cerrado

2019 ◽  
Vol 37 (1) ◽  
pp. 39-46
Author(s):  
Luís Marcelo Mariussi ◽  
Rubson Da Costa Leite ◽  
Gilson Araújo de Freitas ◽  
Robson Da Costa Leite ◽  
Antônio Carlos Martins dos Santos ◽  
...  
Keyword(s):  
Phosphate Fertilizer ◽  
Phosphorus Fertilization ◽  
Dry Land ◽  
Phosphate Fertilization ◽  
Brazilian Soils ◽  
Macro And Micronutrients ◽  
Soybean Plants ◽  
Number Of Stems ◽  
High Doses ◽  
Pod Number

The practices of soil amendment and fertilization carried out over the years have allowed the improvement of the fertility in some of them in the Brazilian soils. The objective of this study was to evaluate the performance of soybean in response to phosphate fertilization in soil with improved fertility. The research was carried out during the 2015-2016 harvest season in a dry-land area in the municipality of São Desidério, Bahia. The experiment was arranged in randomized blocks, with five treatments and four replicates. Treatments were composed by doses of phosphate fertilizer (0, 70, 140, 210 and 280 kg P2O5 ha-1). The following variables were evaluated: plant height, height of insertion of the first pod, number of stems per plant, number of pods per plant, thousand grain weight, productivity, and the analysis of macro and micronutrients in the leaf. Soybean plants did not respond to phosphorus applied to soil with built fertility. Under the conditions of this study, phosphorus fertilization in soil with improved fertility did not promote productivity. Although the plants did not respond to foliar macro and micronutrients as a function of phosphate fertilization, there was no reduction of these in response to high doses.

scholarly journals Nodulation and Development of Soybean Submitted to Inoculation With Bradyrhizobium japonicum and Phosphorus Doses

2018 ◽  
Vol 10 (12) ◽  
pp. 321 ◽  
Author(s):  
Erica Chaves ◽  
Rubson da Costa Leite ◽  
Thalita Rodrigues Silva ◽  
Thayny Alves Viana ◽  
Tatiane de Sousa Cruz ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Experimental Design ◽  
Bradyrhizobium Japonicum ◽  
Phosphate Fertilizer ◽  
Dry Mass ◽  
Root Number ◽  
Phosphate Fertilization ◽  
Soybean Plants ◽  
Biological Nitrogen ◽  
Plant Dry Mass

Among the several factors that may influence nodulation and the efficiency of biological nitrogen fixation for soybean plants, nutrient availability is among the most important. This study aimed to evaluate the inoculation with Bradyrhizobium japonicum and doses of phosphorus on the development of soybean in a Vertisol, in Tocantins. The experimental design was completely randomized in a 4 × 2 factorial scheme, with four replications. Four doses of phosphate fertilization (0, 100, 200, and 300 kg ha-1 P2O5) were studied, combined with two inoculation treatments with Bradyrhizobium japonicum (inoculated and not inoculated). The following variables were evaluated: plant height, stem diameter, nodules per plant, dry mass of nodules, dry mass of plant, dry mass of root, number of pods and number of grains per pod. Under greenhouse conditions and soil with good availability of phosphorus, there is no influence of the doses on the inoculation with Bradyrhizobium japonicum. Soils with good availability of phosphorus have low response to the application of phosphate fertilizer.

scholarly journals Enhanced-efficiency phosphorus fertilizer: promising technology for carrot crop

2018 ◽  
Vol 36 (4) ◽  
pp. 492-497
Author(s):  
Adilson Pelá ◽  
Matheus A Ribeiro ◽  
Rafael U Bento ◽  
Luiz HB Cirino ◽  
Roberto A Reis Júnior
Keyword(s):  
Plant Height ◽  
Root Length ◽  
Phosphate Fertilizer ◽  
Root Diameter ◽  
Additional Treatment ◽  
Mineral Fertilizers ◽  
Phosphorus Fertilizer ◽  
Agronomic Efficiency ◽  
P Content ◽  
Phosphate Fertilization

ABSTRACT Several studies were carried out to evaluate polymer-coated mineral fertilizers; however, few studies, on the agronomic efficiency of these fertilizers in the field in carrot crop, are available. Thus, we aimed to evaluate the use of enhanced-efficiency phosphorus fertilizer coated with polymers in carrot (Daucus carota). The experiment was carried out in field, in Ipameri-GO. The experimental design was randomized blocks, arranged in an incomplete factorial design (5x2)+1, considering five phosphorus doses (150, 300, 450, 600 and 750 ha-1 kg P2O5), two P sources [conventional MAP (monoammonium phosphate) and polymer-coated MAP (Policote)] and one additional treatment (control, without P). The evaluated traits were plant height, root length, root diameter, total productivity, marketable root classes, agronomic efficiency of phosphate fertilization and P content in the roots. Data were submitted to analysis of variance and regression. Phosphate fertilization did not influence the P content in carrot roots, but increased plant height, root length and diameter and yield of carrot roots. Polymer-coated phosphate increased plant height, length, diameter and productivity of carrot roots, when compared to conventional fertilizer. Carrot productivity was, on average, 15.5% higher with polymer-coated P source (39.42 t ha-1) than with the conventional P source (34.11 t ha-1). Marketable roots were also improved with the use of polymer-coated phosphate fertilizer. Phosphate fertilizer coated with polymer increased the agronomic efficiency of phosphate fertilization in the carrot crop.

scholarly journals Monoammonium phosphate coated with polymers and magnesium for coffee plants

2018 ◽  
Vol 42 (3) ◽  
pp. 261-270 ◽  
Author(s):  
Douglas Ramos Guelfi ◽  
Wantuir Filipe Teixeira Chagas ◽  
Jordana Reis Lacerda ◽  
Rafael Mattioli Rezende Chagas ◽  
Taylor Lima de Souza ◽  
...  
Keyword(s):  
Phosphate Fertilizer ◽  
Dry Mass ◽  
Monoammonium Phosphate ◽  
Agronomic Efficiency ◽  
Anionic Polymers ◽  
Growth And Nutrition ◽  
Phosphate Fertilization ◽  
Use Efficiency ◽  
Coffee Plants ◽  
Mg Content

ABSTRACT The coating of phosphate fertilizer granules with polymers and magnesium (Mg) is a technology that can improve phosphorus (P) use efficiency and mitigate problems of low Mg supply in coffee crops. The objective of this work was to evaluate the growth and nutrition characteristics of coffee seedlings and the agronomic efficiency (AE) of monoammonium phosphate (MAP) coated with anionic polymers and Mg in comparison with other phosphate fertilizer technologies. The experiment was carried out in a greenhouse in 20 L pots. Two five-month-old coffee seedlings were transplanted into each pot. The experimental design was completely randomized with three replicates. The following treatments, applied at a dose corresponding to 20 g pot-1 of P2O5, were carried out: MAP; MAP coated with anionic polymers (Policote Phós®); MAP coated with anionic polymers+Mg (Policote Phós_Mg®); Top-Phós®; and Agrocote®. A control (without P) was prepared. Plant height; leaf area; dry mass of leaves, stems, and roots; total dry mass; shoot/root ratio; specific leaf weight; P and Mg content in plants and their availability in the soil after cultivation and efficiency indicesof the phosphate fertilization treatment were evaluated. The recovery of applied P and the agronomic efficiency of phosphate fertilizers was found to increase in the following order: MAP = Top-Phós® = Agrocote®<MAP+Policote Phós® = MAP+Policote Phós_Mg®. The coating of the MAP+Policote Phós_Mg® granules increased growth, the content and accumulation of P and Mg in coffee seedlings, the availability of these nutrients in the soil after cultivation and the agronomic efficiency of phosphate fertilization.

Response of different sources and levels of phosphorus on yield, nutrient uptake and net returns on mungbean under rainfed condition

2015 ◽  
Vol 35 (4) ◽  
Author(s):  
Kuldeep Singh ◽  
R. S. Manohar ◽  
Rakesh Choudhary ◽  
A. K. Yadav ◽  
A. Sangwan
Keyword(s):  
Seed Yield ◽  
Root Nodules ◽  
Phosphorus Fertilization ◽  
Rainfed Condition ◽  
Net Return ◽  
Net Returns ◽  
Phosphorus And Potassium ◽  
Absolute Control ◽  
Different Sources ◽  
Pod Number

The results of the study indicated the application of phosphorus upto 40 kg P<sub>2</sub>O<sub>5</sub> ha<sup>−1</sup> recorded significantly higher number of pods per plant, number of seeds per pod, number of total and effective root nodules, test weight, seed and straw yield, nitrogen, phosphorus and potassium content in seed and straw and their uptake, protein content in seed and net return as compared to absolute control and 20 kg P<sub>2</sub>O<sub>5</sub> ha<sup>−1</sup> but was at par with 60 kg P<sub>2</sub>O<sub>5</sub> ha<sup>−1</sup>. Application of different sources of phosphorus led to significant effect on seed yield. PROM (Phosphorus Rich Organic Manure) (8.36) was significantly superior in increasing the seed yield by 17.74 and 12.21 per cent, respectively, as compared to DAP (7.10) and SSP (7.45). However, both DAP and SSP being at par with each other. Application of phosphorus @ 40 (7.98) and 60 kg P<sub>2</sub>O<sub>5</sub> ha<sup>−1</sup> (8.44) significantly increased the seed yield by 22.95 and 30.04 per cent, respectively as compared to 20 kg P<sub>2</sub>O<sub>5</sub> ha<sup>−1</sup> (6.49). However, both 40 and 60 kg P<sub>2</sub>O<sub>5</sub> ha<sup>−1</sup> were at par with each other in increasing seed yield. The highest net return (Rs. 14865) was obtained with application of 40 kg P<sub>2</sub>O<sub>5</sub> ha<sup>−1</sup> over absolute control and 20 kg P<sub>2</sub>O<sub>5</sub> ha<sup>−1</sup> and phosphorus fertilization with PROMfetched the highest net return (Rs. 14736 ha<sup>−1</sup>) which was significantly higher over DAP and SSP.

THE REACTION OF TWO LUVISOLIC FOREST SOILS TO PHOSPHATE FERTILIZATION

1977 ◽  
Vol 57 (4) ◽  
pp. 385-395
Author(s):  
J. BAKER
Keyword(s):  
Forest Soils ◽  
Soil Phosphorus ◽  
Aluminum Phosphate ◽  
Phosphorus Compounds ◽  
Phosphorus Fertilization ◽  
Litter Layer ◽  
Reaction Products ◽  
Sampling Depth ◽  
Chemical Extractants ◽  
Phosphate Fertilization

Response of two forested Luvisolic soils to phosphorus fertilization was compared using chemical extractants known to be effective in removing certain soil phosphorus compounds. Fifteen months following fertilization application, the Mercoal series (Bisequa Luvisol) showed total phosphorus decreases in each of the soil horizons or layers sampled. To sampling depth, phosphorus concentrations in all but the NH4F extract (mainly aluminum phosphate) were lower in fertilized than in control samples. Vegetative uptake was considered to be mainly responsible for phosphorus decreases and movement, especially noticeable in the deeper mineral horizons. The Coalspur series (Orthic Luvisol) showed an appreciable phosphorus increase in the litter layer although both mineral horizons, Ae and Bt, exhibited losses. The Coalspur soil exhibited increases in soil phosphorus susceptible to all but the NH4F extractant. The data suggest a greater mobility and movement of soil phosphorus in these Luvisolic forest soils than usually observed in cultivated soils. Following fertilization, Mercoal probably had a greater number of phosphorus compounds (reaction products perhaps) more readily available than did the Coalspur.

scholarly journals Agronomic performance of soybean crops under integrated production systems in the Southwestern Brazilian Amazon biome

2020 ◽  
Vol 24 (12) ◽  
pp. 793-799
Author(s):  
Rodrigo da S. Ribeiro ◽  
Alexandre M. A. dos Passos ◽  
Andreia M. Aker
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Production Systems ◽  
Brazilian Amazon ◽  
Maturation Stage ◽  
Agronomic Performance ◽  
Integrated Production ◽  
Alternative Crop ◽  
Soybean Plants ◽  
Pod Number

ABSTRACT Soybean is an alternative crop to be used in intensified land use systems and recovery of degraded areas in Brazil. Thus, the objective of this study was to evaluate the agronomic performance of soybean crops under integrated production systems in the Southwestern Brazilian Amazon biome. Soybean crop was grown in alleys with widths of 18, 30, and 42 m between the 4-row tree sets of eucalyptus and evaluated in two agricultural years (2016-2017 and 2017-2018). Plant height, first pod insertion height, number of grains per pod, number of pods per plant, 100-grain weight, and grain yield of soybean plants at maturation stage were evaluated in different distances from the eucalyptus (10, 20, 30 and 45% of the alley width). The lowest mean grain yield was found for the alley of 18 m in the 2017-2018 agricultural year. The proximity of soybean plants to eucalyptus trees affects negatively the grain yield, plant height, first pod insertion height, plant population, and number of pods per plant. The crop-livestock-forest integration system, with the forest component consisting of 5-year-old eucalyptus trees (technical age for harvest), resulted in higher soybean grain yields for the alley of 42 m. The growth of soybean crops in alleys of 18 m between 4-row tree sets of 5-year-old eucalyptus trees is not recommended for the Southwestern region of the Brazilian Amazon biome.

scholarly journals OPTIMALISASI TANAH KRITIS DENGAN MIKORIZA DAN FOSFAT UNTUK PENINGKATAN PERTUMBUHAN DAN SERAPAN HARA KEDELAI

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Yusrizal Yusrizal ◽  
Muyassir Muyassir ◽  
Syafruddin Syafruddin
Keyword(s):  
Key Words ◽  
Interaction Effect ◽  
Rock Phosphate ◽  
Phosphate Fertilizer ◽  
Random Design ◽  
Agricultural Faculty ◽  
Soybean Plants ◽  
Phosphate Source ◽  
Experimental Garden ◽  
Banda Aceh

This study aims to identify the effects of mycorrhiza arbuscular and phosphate source fertilizer on the growth and nutrients absorption of soybean on critical land. The research was carried out in the experimental garden of Agricultural Faculty, University of Syiah Kuala Darussalam, Banda Aceh. The research was done in an experiments using polybag of random design group (shelves) consisting 2 factors, namely mycorrhiza arbuscular consisting of 4 standards without mycorrhiza, glomus 10 g, mycorrhiza gigaspora 10 g, and mixture glomus 5 g + gigaspora 5 g and phosphate fertilizer consisting 4 factors namely without phosphate fertilizer, rock fosfat, guano, and SP-36. The result showed that the interaction effect of mycorrhiza glomus and guano phosphate application improved growth and nutrients absorption of soybean plants. Key words: Gigaspora, Glomus, guano, rock phosphate, soybean, SP-36/>

scholarly journals Adubação fosfatada no feijoeiro cultivado sob palhada de Brachiaria brizantha cv. Marandu

Revista CERES ◽  
2018 ◽  
Vol 65 (2) ◽  
pp. 181-188
Author(s):  
João Vitor de Souza Silva ◽  
Simério Carlos Silva Cruz ◽  
Alessandra Mayumi Tokura Alovisi ◽  
Carlos Hissao Kurihara ◽  
Warless Domingos Xavier ◽  
...  
Keyword(s):  
Grain Yield ◽  
Cover Crop ◽  
Block Design ◽  
Phosphate Fertilizer ◽  
Phosphorus Fractionation ◽  
Phosphorus Fertilization ◽  
Brachiaria Brizantha ◽  
Randomized Block Design ◽  
Labile P ◽  
Management Alternatives

ABSTRACT The application of phosphate fertilizer is indispensable for the achievement of sustainable bean production, and P is necessary practically in the entire cycle. Thus, cultural management alternatives have been used in the best use of this nutrient, among them the use of Brachiaria as cover crop. The objective of this research was to evaluate the dynamics of phosphorus in the soil with and without the presence of Brachiaria brizantha cv. Marandú as cover crop, and the bean response to phosphorus fertilization. We used a randomized block design with a split plot arrangement; the plots were composed of P2O5 doses (0, 50, 100, 200, and 400 kg ha-1) via triple superphosphate; and the subplots were composed of the presence and absence of Brachiaria as previous cover crop cultivation of beans. Soil samples were taken at 15 and 30 days after sowing (DAS) bean. In the samples, phosphorus fractionation in soil was carried out by the Hedley technique. Phosphorus content was evaluated in the leaf and grain yield of bean plants. The phosphorus fertilization and cultivation of Brachiaria brizantha cv. Marandú as cover crop provided changes in the levels of labile P of soil at 15 and 30 DAS bean, and labile P of soil only at 15 DAS bean. The presence of B. brizantha cv. Marandú as cover crop increases the P content in the bean leaf with consequent grain yield gain of 18%.

scholarly journals Rock phosphate fertilization harms Azospirillum brasilense selection by maize

2019 ◽  
pp. 1967-1974
Author(s):  
Carime Moraes ◽  
Roberta Mendes dos Santos ◽  
Everlon Cid Rigobelo
Keyword(s):  
Microbial Biomass ◽  
Azospirillum Brasilense ◽  
Dry Matter ◽  
Rock Phosphate ◽  
Microbial Biomass Carbon ◽  
Phosphorus Fertilization ◽  
Biomass Carbon ◽  
Nitrogen And Phosphorus ◽  
Maize Crop ◽  
Phosphate Fertilization

Maize is the most important crop cultivated worldwide. It needs a significant amount of nitrogen and phosphorus fertilization to maintain high yields. However, the high cost of fertilization makes production more expensive and damages the environment. The present study used Azospirillum brasilense and Bacillus subtilis bacteria in an attempt to supply nitrogen and phosphorus fertilization to a maize crop. The experiment was carried out with maize plants under greenhouse conditions with a factorial scheme (4 x 2 x 2), where the first factor corresponded to bacterial inoculation: (a) control (no inoculation); (b) A. brasilense inoculation (AZ); (c) B. subtilis inoculation (BS) and (d) inoculation with a mixture of (AZ+BS), the second factor corresponded to the presence or absence of rock phosphate fertilization and the third factor corresponded to the presence or absence of top-dressed nitrogen fertilizer. Evaluated plant parameters were height, shoot dry matter (SDM), root dry matter (RDM), and soil parameters were total colony forming units of bacteria (CFU), nitrogen, soluble phosphorus and microbial biomass carbon (MBC). Although some parameters were improved with mineral fertilization in general, the findings showed that there were many adverse effects with the use of rock phosphate fertilization and A. brasilense inoculation. When both were applied together in treatments, there was reduction in plant height, microbial biomass carbon and total number of bacteria compared to treatments without rock phosphate fertilization. These results strongly suggest that rock phosphate harms the ability of A. brasilense to promote plant growth and demonstrate the necessity of new studies to verify whether this negative effect occurs under field conditions and could reduce yields in maize crop production.

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