Produção Nacional
Revisado por pares
Produção e nutrição do capim-braquiária em função de doses de nitrogênio e enxofre
2003; INSTITUTO DE ZOOTECNIA IZ/APTA-SAA/SP; Volume: 60; Issue: 1 Linguagem: Inglês
ISSN
1981-4100
AutoresWaldssimiler Teixeira de Mattos, Francisco Antônio Monteiro,
Tópico(s)Nitrogen and Sulfur Effects on Brassica
ResumoThe present work was carried out in a greenhouse with the objective of evaluating the effects of nitrogen and sulfur rates on plant tops dry matter yield, chlorophyll concentration and plant tissue mineral composition in Brachiaria decumbens Stapf. Forty-eight soil cores containing signal grass (tops + roots) were collected in the studied pasture and put in plastic pots. A 4 x 3 factorial (nitrogen rates and sulfur rates) in a randomized complete block design, with four replications, was used. Nitrogen rates were 0; 50; 100 and 200 mg dm-3 where as sulfur rates were 0; 30 and 60 mg dm-3. Plants were harvested three times at: 40 days after the plots uniformization, 40 days after the first harvest and 40 days after the second harvest. The results showed that the nitrogen x sulfur interaction was significant (P<0.01) for the plant tops forage yield in the first and second harvests. Nitrogen rates significantly (P<0.01) influenced nitrogen concentration in the newly expanded leaf laminae from the first and third harvests. Nitrogen x sulfur interaction was significant (P<0.01) for the nitrogen concentration in diagnostic leaf laminae in the second harvest.
Referência(s)