Nutrients dynamics in soil solution at the outset of no-till implementation with the use of plant cocktails in Brazilian semi-arid
| Autor: | Antonio Pereira Filho, José Teixeira Filho, Vanderlise Giongo, Rattan Lal, Welson Lima Simoes |
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| Přispěvatelé: | ANTONIO PEREIRA FILHO, UNIVASF, JOSÉ TEIXEIRA FILHO, UNICAMP, VANDERLISE GIONGO, CPATSA, WELSON LIMA SIMOES, CPATSA, RATTAN LAL, Ohio State University, Columbus, OH. |
| Rok vydání: | 2016 |
| Předmět: |
Soil test
Planta Cucumis Melo Plantio Direto 010501 environmental sciences complex mixtures 01 natural sciences Caatinga Soil management Soil Green manure No-till farming Cover crop 0105 earth and related environmental sciences Topsoil Macronutrientes Soil organic matter Adubação orgânica food and beverages 04 agricultural and veterinary sciences Fertilidade do solo Melão Solo Agronomy Manejo do Solo 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Soil fertility General Agricultural and Biological Sciences |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| ISSN: | 1991-637X |
| DOI: | 10.5897/ajar2015.10047 |
| Popis: | Tillage systems strongly impact nutrient transformations and plant availability. Therefore, the objective of this study was to assess the impacts of conversion of conventional tillage (CT) to no-till (NT) with a mixture of cover crops and green manure as nutrient uptake in a fertilized melon (Cucumis melon) in a semi-arid region of Brazil. Two fields experimental involved randomized blocks design, in a split-plot scheme, with four replication treatments included three types of cover crops and two tillage systems (conventional and no-till). Subsamples of plant cocktails were used to assess the biomass production. Soil samples were analyzed during the melon growth for determination of soil moisture by the frequency domain reflectometry (FDR) probe. Soil solution samples were extracted with ceramic cups from each treatment, and analyzed for determination of TP, Na+, Ca2+, Mg2+, S and NO3-N. Mobility of these elements was assessed in relation to management and different cover crops. The data showed slight or no strong effect of plant cocktails composition on nutrients dynamics in soil under melon. However, without incorporation of biomass and slower decomposition of residue mulch retained on the surface, risks of leaching losses were lower under NT than CT system. A higher concentration of cations in CT (for example, Ca+2 ~ 42.07 mg L-1) may be attributed to high soil moisture content and faster rate of mineralization of the biomass incorporated. Concentration of P was higher in top soil layers depth in NT system (~ 6.65 mg L-1 at 15 cm) because of the deposition of plant cocktail biomass in soil surface with low SOM contents placement of fertilizer, and possible formation of calcium phosphate with low solubility. Relatively, high concentration of NO3-N (~ 60.16 mg L-1) in CT was attributed to increase in decomposition of soil organic matter (SOM) and crop residues incorporated into the soil. Key words: Macronutrient, soil fertility, cover crop, soil management, Cocumis melo, Caatinga. |
| Databáze: | OpenAIRE |
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