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| Pavan,Marcos Antonio; Chaves,Júlio César Dias; Siqueira,Rubens; Androcioli Filho,Armando; Colozzi Filho,Arnaldo; Balota,Elcio Liborio. |
| The objective of this work was to evaluate the effect of coffee (Coffea arabica L.) population densities on the chemical and microbiological properties of an Oxisol. The work was carried out on soil samples of 0-20 cm depth originated from an experimental site which had been used for coffee tree spacing studies during 15 years, in Paraná State, Brazil. Eight coffee tree populations were evaluated: 7143, 3571, 2381, 1786, 1429, 1190, 1020, and 893 trees/ha. Increasing plant population increased soil pH, exchangeable Ca, Mg, K, extractable P, organic carbon, moisture content and coffee root colonization by vesicular arbuscular mycorrhizal fungi, and decreased exchangeable Al and microbial biomass. Such results were attributed to better erosion control,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Acid soil; Tree spacing. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000300018 |
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| Silva,Andréa Scaramal da; Colozzi Filho,Arnaldo; Nakatani,André Shigueyoshi; Alves,Sérgio José; Andrade,Diva de Souza; Guimarães,Maria de Fátima. |
| Integrated crop-livestock systems (ICLs) are a viable strategy for the recovery and maintenance of soil characteristics. In the present study, an ICL experiment was conducted by the Instituto Agronômico do Paraná in the municipality of Xambre, Parana (PR), Brazil, to evaluate the effects of various grazing intensities. The objective of the present study was to quantify the levels of microbial biomass carbon (MBC) and soil enzymatic activity in an ICL of soybean (summer) and Brachiaria ruziziensis (winter), with B. ruziziensis subjected to various grazing intensities. Treatments consisted of varying pasture heights and grazing intensities (GI): 10, 20, 30, and 40 cm (GI-10, GI-20, GI-30, and GI-40, respectively) and a no grazing (NG) control. The microbial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial carbon; Microbial respiration; Acid phosphatase; Β-glucosidase; Arylsuphatase; Fluorescein diacetate hydrolysis; Carbono microbiano; Respiração microbiana; Fosfatase ácida; Β-glucosidase; Arilsulfatase; Hidrólise do diacetato de fluoresceína. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100040 |
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| Machineski,Oswaldo; Balota,Elcio Liborio; Colozzi Filho,Arnaldo; Andrade,Diva Souza; Souza,José Roberto Pinto de. |
| O objetivo neste trabalho foi de avaliar o efeito da inoculação de fungos micorrízicos arbusculares no crescimento de mudas de peroba rosa (Aspidosperma polyneuron). O experimento foi conduzido em delineamento experimental, inteiramente casualizado, em casa de vegetação com seis repetições. Utilizou-se mistura de solo e areia (3:1), desinfestado como substrato, com os seguintes tratamentos de inoculação: Gigaspora margarita, Glomus clarum, Scutellospora heterogama, Acaulospora scrobiculata e uma mistura de fungos micorrízicos arbusculares (FMA). Após 120 dias, observou-se que a colonização micorrízica radicular foi de 28,3% a 48,4% para a mistura de FMA e para G. margarita, respectivamente. As plantas inoculadas com G. margarita e G. clarum apresentaram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspidosperma polyneuron; Acaulospora scrobiculata; Gigaspora margarita; Glomus clarum; Scutellospora heterogama. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000200041 |
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