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| Ceretta,Carlos Alberto; Basso,Claudir José; Diekow,Jeferson; Aita,Celso; Pavinato,Paulo Sérgio; Vieira,Frederico Costa Beber; Vendrusculo,Edson Rodrigo Oliveira. |
| The studies of fertilization splitting are necessary specially for the grass succession black oat-corn where N immobilization is very common. Four experiments were carried out in commercial farms under no-tillage, in four counties - Itaara, Santo Ângelo, Júlio de Castilhos and Tupanciretã, all of Rio Grande do Sul, Brazil, with the objective of evaluating the splitting of N application in a corn/black oat crop rotation, during the 97/98 and 98/99 cropping seasons. The N was applied at three times -- pre-planted, starter and sidedressed. The pre-planted applied N for corn, corresponding to total or partial rates that would be sidedressed presented similar results in relation to the sidedress application, however, years of above average rainfall presented N... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cultural successions; Mineral nitrogen; Fertilization. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300021 |
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| Ambrosano,Edmilson José; Trivelin,Paulo Cesar Ocheuze; Cantarella,Heitor; Ambrosano,Gláucia Maria Bovi; Muraoka,Takashi. |
| Nitrogen (15N) released from sunnhemp (Crotalaria juncea), velvet bean (Mucuna aterrima) and from Phaseolus bean residues was evaluated after incubation of the plant material in an Eutrudox and a Paleudalf, in a greenhouse experiment with pots containing 6 kg of air dried soil. Dry matter equivalent to 13 Mg ha-1 of Phaseolus bean residues and the same amount of above ground parts of the leguminous species, associated to 2.7 and 2.2 Mg ha-1 of roots of sunnhemp and velvet bean respectively, were incorporated into the soil. A completely randomized experimental design was adopted, with treatments arranged in a 2 <FONT FACE=Symbol>´</FONT> 3 + 1 factorial, replicated three times. The treatments were the following: two soils (Eutrudox and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineral nitrogen; Green manure; Nitrogen-15; N-mineralization. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100020 |
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| Dall’Orsoletta,Daniel J.; Rauber,Luiz P.; Schmitt,Djalma E.; Gatiboni,Luciano C.; Orsolin,Jhonatan. |
| ABSTRACT The volatilization of ammonia (NH3) and nitrate leaching (NH3-) are the main processes of nitrogen (N) loss in the soil. The objective of the study was to evaluate N losses by NH3 volatilization and mineral N transformations in the soil with urea coated with poultry litter (urea + litter) compared with other sources of N, under two moisture conditions. The experiment was conducted in a controlled environment with a 5 x 2 factorial arrangement with four replicates, five N sources (urea, SuperN®, Kimcoat®, urea + litter and control without fertilizer) and two moisture contents [80 and 100% of field capacity (FC)]. The total volatilized NH3 did not differ between the sources, regardless of the soil moisture condition, ranging from 10.8 to 13.2% of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Volatilization; Nitrification; Mineral nitrogen. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600398 |
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