Produção Nacional
Revisado por pares
Respostas de Panicum Maximum cultivar Aruana a doses de nitrogênio
2000; INSTITUTO DE ZOOTECNIA IZ/APTA-SAA/SP; Volume: 57; Issue: 1 Linguagem: Inglês
ISSN
1981-4100
AutoresMaria Tereza Colozza, Jorge de Castro Kiehl, Joaquim Carlos Werner, Eliana Aparecida Schammass,
Tópico(s)Crop Yield and Soil Fertility
ResumoIn greenhouse conditions the grass was cultivated in a dystrophic Red-Yellow Latossol where it was applied 0; 15; 30; 60; 120; 200 e 300 mg N kg-1 of soil at planting and 0; 30; 60; 120; 210; 330 e 450 mg N kg-1 of soil after the first cut. A randomized complete block design was used with eight replications. It was effected two harvests at the age of 34 days. In both cuts the plant parts sampled were: a)blades from leaves at the top of the plant, without visible ligule; b) blades of new leaves, containing the blades of the two younger leaves totally expanded with visible ligule; c) blades of the old leaves, containing the blades of the other leaves totally expanded; d) stems + sheaths. The maximum dry matter yield was reached with 150 and 232 mg N kg-1 of soil and the maximum tiller number was reached with 159 and 232 mg N kg-1 of soil in the first and second harvest, respectively. The concentration of total and nitric nitrogen and the amount of chlorophyll - SPAD values in the plant parts increased with the nitrogen rates.
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