|
|
|
| Registros recuperados: 26 | |
|
|
| Guerra, Naiara; Universidade Estadual de Maringá-UEM; Oliveira Júnior, Rubem Silvério de; Universidade Estadual de Maringá - UEM; Constantin, Jamil; Universidade Estadual de Maringá - UEM; Oliveira Neto, Antonio Mendes de; Universidade Estadual de Maringá - UEM; Dan, Hugo de Almeida; Universidade Estadual de Maringá - UEM; Braz, Guilherme Braga Pereira; Universidade Estadual de Maringá - UEM. |
| Scarce research has been published concerning the effect of soil pH on the leaching potential of herbicides in tropical soils. Thus, we designed this study to evaluate the influence of soil liming on the leaching of trifloxysulfuron-sodium and pyrithiobac-sodium after simulated rainfall depths in soil columns. In the study, two trials were conducted simultaneously; the first experiment evaluated trifloxysulfuron-sodium (7.5 g ha-1), while the second experiment evaluated pyrithiobac-sodium (70 g ha-1). Both experiments were conducted in a randomized block design with a 2 x 4 x 5 factorial scheme and four replications. The design’s factors corresponded to 2 soil liming conditions (with or without liming), 4 simulated rainfall depths (0, 15, 30, and 45 mm)... |
|
Palavras-chave: ALS inhibitors; Mobility; Soil pH; Tropical soils. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16349 |
| |
|
|
| Gaiad,Sérgio; Rakocevic,Miroslava; Reissmann,Carlos Bruno. |
| The influence of different N sources on the growth of maté (Ilex paragurariensis St.Hil.) seedlings grown in greenhouse was studied. All seedlings received a base fertilization of 10 mg N.kg-1 soil as NH4NO3, 60 mg P2O5.and 40 mg K2O.kg-1 soil as KH2PO4 15 days before treatments application. Treatments were as follow: Control, with no extra N added; Urea = 100 mg N.kg-1 soil as Urea; NO3- = 100 mg N.kg-1 soil as Ca(NO3)2; and NH4+ = 100 mg N.kg-1 soil as (NH4)2SO4. It was concluded that: 1) increasing N content in leaves alone was not able to promote gain in biomass production of maté seedlings; 2) seedlings receiving N-NH4 showed a higher accumulation of P and Mg on shoot biomass; and 3) an increase in leaf area, leaf number and net photosynthesis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ammonium; Nitrate; Soil pH. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600001 |
| |
|
|
| Cornejo,Pablo ; Rubio,Rosa ; Borie,Fernando . |
| Arbuscular mycorrhizal fungi (AMF) form symbiosis with plant roots, improving its establishment, nutrition, and tolerance to adverse soil conditions. In annual crop rotations, some aspects such as the type of N fertilizer and tillage system used can affect the AMF propagule density and its functionality in the following crop. To analyze the effect of the agronomic practices previously mentioned on the persistence and density of AMF propagules, a study in a succession of cereals was carried out. For this, soil previously cropped with wheat (Triticum aestivum L.) and fertilized with urea (NH4+) or sodium nitrate (NO3-) was disturbed in each case by simulating conventional tillage (CT) or maintained without disturbing, simulating no-tillage (NT). It was then... |
| Tipo: Journal article |
Palavras-chave: Arbuscular mycorrhiza; Mycorrhizal propagules; Soil disturbing; Soil pH; Wheat-oat succession. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300016 |
| |
|
|
| Shen,Yuwen; Lin,Haitao; Song,Xiaozong; Liu,Ping; Bo,Luji; Chen,Jianqiu; Yang,Li. |
| ABSTRACT: The influences of byproduct amendments, containing silicon, calcium, magnesium and potassium, on acidic soil quality in Jiaodong Peninsula of China had been studied and compared with that of lime through monitoring physicochemical properties and enzyme activities of acidic soil over a 120-day period. Byproduct amendments (1125, 2250, 4500 and 9000 kg ha-1) and lime 2250 kg ha-1 was applied in the acidic soil. Results showed that both byproduct amendments and lime significantly increased the pH, EC and enzyme activities of soil. The by-product amendments inhibited microbial biomass carbon and soil respiration. Nevertheless, the lime-treated soil had a much more higher level of CO2 emission than the by-product amendments-treated soil. Compared to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil amendments; Soil pH; Soil respiration; Enzyme activity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600252 |
| |
|
| |
|
| |
|
| |
|
|
| MAEDA, S.; ROMAN, E. S.; LEÔNIDAS, F. das C.; LIMA, J. A. de S.. |
| Experimentos conduzidos no campo experimental do Centro de Pesquisa Agroflorestal de Rondonia (CPAF-RO) da EMBRAPA, municipio de Vilhena, RO. Utilizou-se o delineamento experimental em blocos ao acaso com quatro repeticoes. Os ensaios foram conduzidos durante cinco anos agricolas, com inicio em 1983/84. Resultados concluiram que a calagem afetou positiva e significativamente o rendimento de graos, altura das plantas e da insercao da primeira vagem da soja cv. Tropical. A aplicacao de 1/2 NC a lanco na ausencia de "filler" na linha foi a dose mais adequada, proporcinando rendimentos de graos semelhantes aos obtidos com 1,0 ou 1,5 NC a lanco ou1/2 a lanco mais "filler" na linha. Para o cerrado de Rondonia o uso de calcario finamente moido na linha de... |
| Tipo: Folhetos |
Palavras-chave: Embrapa Rondônia; Vilhena (RO); Rondônia; Amazônia Ocidental; Western Amazon; Soja; Glycine Max; Acidez do Solo; Corretivo; Calagem; Pratica Cultural; Rendimento; Campo Experimental; Cerrado; Soybeans; Soil pH; Liming; Plant cultural practices; Crop yield; Cerrado soils. |
| Ano: 1995 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697881 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| FREITAS, D. A. F. de; CARDOSO, E. L.; SILVA, M. L. N.; SANTOS, S. A.. |
| O Pantanal da Nhecolândia é caracterizado por uma elevada diversidade de unidades de vegetação que apresentam diferenças na fertilidade do solo. O presente estudo objetivou avaliar a disponibilidade de micronutrientes do solo sob as diferentes fitofisionomias desta região. Amostras de solo foram coletadas na profundidade de 0-10 cm, para avaliação da disponibilidade de zinco, ferro, manganês, cobre, boro e sódio, em sete fitofisionomias sujeitas a diferentes regimes de inundação: a) livres de inundação - floresta semidecídua e cerradão; b) sujeitas a inundação ocasional ? cerrado/campo cerrado e campo limpo com predominância de Elionurus muticus; c) sujeita a inundação sazonal - campo limpo com predominância de Axonopus purpusii e Andropogon spp.; bordas... |
| Tipo: Folhetos |
Palavras-chave: PH do solo; Native vegetation; Matéria Orgânica; Vegetação Nativa; Organic matter; Soil pH. |
| Ano: 2011 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/921423 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Cardoso,Eduardo Garcia; Sá,João Carlos de Moraes; Briedis,Clever; Ferreira,Ademir de Oliveira; Borszowskei,Paulo Rogério; Santos,Josiane Burkner; Massinham,Aline; Ferreira,Carla Fernanda; Siuta Júnior,Darci; Baranek,Edemar José. |
| Nitrogen is the main limiting factor in crop productivity and thereby soil management systems may change the mineralization and nitrification rates. In an experiment on soil management systems implemented in 1988 at the experimental station Fundação ABC, Ponta Grossa, in the central South region of the State of Paraná, inorganic N dynamics were examined to find a soil management strategy with a view to a sustainable environment. The objective of this study was to calculate the net mineralization and nitrification rates of soil N and the correlation with soil pH under management systems. Randomized complete block design was used, in split plots, in three replications. The following soil management systems (SMSs) were adopted in the plots: 1) conventional... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation systems; No-tillage; Conventional tillage; Soil pH. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500019 |
| |
| Registros recuperados: 26 | |
|
|
|
