Faria, Clementino Marcos Batista de ; Silva, Davi José ; Pinto, José Maria and Gomes, Tâmara Claudia de Araújo (2006) Efeito de fosfatos naturais em plantas de melão cultivadas em vasos. [Effect of natural phosphates on melon plants cultivated in pots.] Revista Brasileira de Ciência do Solo, 30 (6), pp. 1083-1091.
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Summary
Com o advento da agricultura orgânica no Vale do Submédio São Francisco, surge a demanda por técnicas que atendam aos princípios desse sistema de exploração agrícola. Dessa forma, realizou-se este trabalho com o objetivo de avaliar a eficiência de fosfatos naturais em três solos (Argissolo Acinzentado distrófico – PACd, Argissolo Amarelo eutrófico – PAe e Vertissolo – V) da região, cultivados com melão (Cucumis melo) em vasos, na Embrapa Semi-Árido. Os tratamentos constituíram um fatorial (3 x 4) + 1, sendo três doses de P (40, 80 e 160 mg dm-3 de P2O5), quatro fontes de P (superfosfato triplo–ST, termofosfato–TM, fosfato natural de Gafsa–FG e fosfato natural Fosbahia–FB) e uma testemunha sem P, dispostos no delineamento experimental inteiramente casualizado, com três repetições. Cada solo constituiu um ensaio. Após 38 dias de cultivo do melão, avaliaram-se a produção de matéria seca (MS) da parte aérea, o P absorvido pela planta e o P do solo extraído pelos métodos de Mehlich-1 e resina de troca aniônica (RTA). No V e PACd, os fosfatos apresentaram-se menos eficientes que no PAe. O TM foi a fonte de P que apresentou maior eficiência para produção de MS do melão nos três solos (56 a 100 % em relação ao superfosfato triplo). No PAe, o FG também mostrou boa eficiência, sendo equivalente a 80 % do superfosfato triplo. Os extratores Mehlich e RTA foram igualmente eficientes para avaliar a disponibilidade do P.
Summary translation
Organic agriculture is an emerging activity in the upper mid São Francisco River Valley, requiring technologies that are in line with the principles of this agricultural system. A study was carried out at Embrapa Semi-Árido to evaluate the efficacy of natural phosphates applied to three regional soils (dystrophic Grey Argisol - PAGd, eutrophic Yellow Argisol - PAe and Vertisol - V) planted with melon (Cucumis melo) in pots accommodated on wooden benches. The factorial treatments (3 x 4) + 1 consisted of three phosphorus levels (40, 80 and 160 mg dm-3 P2O5), four phosphorus sources (triple superphosphate-ST, thermophosphate-TM, Gafsa natural rock phosphate-FG and Fosbahia natural phosphate-FB) and a control treatment without phosphorus, in a completely randomized design with three replications. Each soil represented a trial. Shoot dry matter (DM), P plant content and P soil concentration extracted by Mehlich-1 and anionic exchange resin (AER) were evaluated 38 days after planting. In V and PAGd soils the phosphates were less effective than in PAe soil. TM was the P source with the highest efficiency for DM production in the three soils (56 to 100 % in relation to triple super phosphate). In PAe, FG also presented relatively high efficiency, equivalent to 80 % of that obtained with triple super phosphate. The Mehlich-1 and AER extractors were equally effective at evaluating P availability.
| EPrint Type: | Journal paper |
|---|---|
| Keywords: | Cucumis melo, Solo, Fósforo, Extrator químico, Melão. Cucumis melo, Soil, Phosphorus, Chemical extractor. |
| Agrovoc keywords: | Language Value URI English Cucumis melo http://aims.fao.org/aos/agrovoc/c_2003 English Soil http://aims.fao.org/aos/agrovoc/c_7156 English Phosphorus http://aims.fao.org/aos/agrovoc/c_5804 English chemicals http://aims.fao.org/aos/agrovoc/c_1520 |
| Subjects: | Crop husbandry > Production systems Crop husbandry > Soil tillage Crop husbandry > Production systems > Fruit and berries |
| Research affiliation: | Brazil > Embrapa - Brazilian Agricultural Research Corporation Brazil > Other organizations |
| ISSN: | 0100-0683 |
| DOI: | 10.1590/S0100-06832006000600018 |
| Related Links: | http://www.scielo.br/?lng=es |
| Deposited By: | Pinto, Gabriela Franco |
| ID Code: | 22668 |
| Deposited On: | 17 May 2013 15:27 |
| Last Modified: | 17 May 2013 15:27 |
| Document Language: | Portuguese/Portugues |
| Status: | Published |
| Refereed: | Peer-reviewed and accepted |
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