Consulta: subjectFacets:"Isotope technique"
Registros recuperados: 3
Data/hora: 06/06/2024 00:48:35

Use of nitrogen from fertilizer and cover crops by upland rice in an Oxisol under no-tillage in the Cerrado
Provedor de dados: 86
Autores: Silva,Edson Cabral da; Muraoka,Takashi; Franzini,Vinícius Ide; Sakadevan,Karuppan; Buzetti,Salatiér; Arf,Orivaldo; Bendassolli,José Alberto; Soares,Frederico Antônio Loureiro.
Abstract: The objective of this work was to evaluate the effects of cover crops on the yield of upland rice (Oryza sativa) grown under no-tillage system, in the presence and absence of N fertilizer, as well as to quantify, in the field, the use efficiency of N from urea and cover crops by upland rice, through the 15N isotope dilution technique. The field experiment was carried out in the municipality of Selvíria, in the state of Mato Grosso do Sul, Brazil, in an Oxisol (Rhodic Hapludox) in the Cerrado (Brazilian savanna) region. The experimental design was a randomized complete block with 15 treatments and four replicates, in a 5x3 factorial arrangement. The treatments were four cover crops (Crotalaria juncea, Cajanus cajan, Mucuna pruriens, and Pennisetum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Crop residues; Isotope technique; Mineralization; 15N; Nutrient cycling.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000600728

15N-labeled nitrogen from green manure and ammonium sulfate utilization by the sugarcane ratoon
Provedor de dados: 63
Autores: Ambrosano,Edmilson José; Trivelin,Paulo Cesar Ocheuze; Cantarella,Heitor; Ambrosano,Gláucia Maria Bovi; Schammass,Eliana Aparecida; Muraoka,Takashi; Rossi,Fabrício.
Legumes as green manure are alternative sources of nitrogen (N) for crops and can supplement or even replace mineral nitrogen fertilization due to their potential for biological nitrogen fixation (BNF). The utilization of nitrogen by sugarcane (Saccharum spp.) fertilized with sunn hemp (Crotalaria juncea L.) and ammonium sulfate (AS) was evaluated using the 15N tracer technique. N was added at the rate of 196 and 70 kg ha-1 as 15Nlabeled sunn hemp green manure (SH) and as ammonium sulfate (AS), respectively. Treatments were: (i) Control; (ii) AS15N; (iii) SH15N + AS; (iv) SH15N; and (v) AS15N + SH. Sugarcane was cultivated for five years and was harvested three times. 15N recovery was evaluated in the two first harvests. In the sum of the three harvests,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Brazil; Sunn hemp; Isotope technique.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300014

Utilization of nitrogen from green manure and mineral fertilizer by sugarcane
Provedor de dados: 63
Autores: Ambrosano,Edmilson José; Trivelin,Paulo Cesar Ocheuze; Cantarella,Heitor; Ambrosano,Gláucia Maria Bovi; Schammass,Eliana Aparecida; Guirado,Nivaldo; Rossi,Fabrício; Mendes,Paulo Cesar Doimo; Muraoka,Takashi.
Given their potential for biological nitrogen fixation, legumes used as green manure are an alternative source of nitrogen to crops, and can supplement or even replace mineral nitrogen fertilization. The utilization of nitrogen by sugarcane (Saccharum spp.) fertilized with sunn hemp (Crotalaria juncea L.) and ammonium sulphate (AS) was evaluated using the 15N tracer technique. Amounts of 195.8 kg and 70 kg N per hectare, respectively, of sunn hemp and AS were added in the following treatments: without green manure and without AS; without green manure, with AS -15N; with green manure-15N and with AS; with green manure-15N, without AS; with green manure and with AS-15N. Four samples from the leaves +3 were collected and 2 m of the sugar cane row were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp; Sunn hemp; 15N; Isotope technique.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000600004