Abstract
DOSES AND SOURCES OF NITROGEN ON MINERAL NUTRITION IN MARANDU GRASS Nitrogen is an one principal among others, essential and responsible nutrient for forage productivity and pasture quality increasing. Besides that, this paper objective was to evaluate nitrogen doses and source effects on nutrient concentration in marandu palisadegrass. The experiment was carried out from July of 2003 to March of 2006 at the Modelo Farm of University Goias State in an 882 m2 area. The pasture was established for more than ten years and it was presenting low herbage production being considered in moderate degradation phase. The treatment combination was made in a split-plot design with three replicates. Main plot, arrangements in a randomized complete block design was employed, were turned by a 2 x 4 factorial, being two sources of N (ammonium sulfate and urea) and four doses of N (0, 100, 200 and 300 kg ha-1 yr-1). On each year, during the three years, three cuts evaluating are done at the forage plant. The rates of Nitrogen didn’t come to the maximum point to the concentrates of N, K, Mg, S, Cu and Fe. Increasing N rates promoted reduction in phosphorus absorption in plant tissue. Higher N:S relation were observed in plants which received urea as nitrogen source. The application of nitrogen, affected the nutritional status of signal grass and the recovery of this. The application of nitrogen, affected the nutritional status of signal grass and it recovering.
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Claims 5
Claim · model-written summary
The tested nitrogen rates did not reach a maximum for N, K and Mg concentrations.
Not reportedDirection
Verbatim
t0“marandu grass”
e0“The rates of Nitrogen didn’t come to the maximum point to the concentrates of N, K, Mg, S, Cu and Fe.”
Claim · model-written summary
The tested nitrogen rates did not reach a maximum for S, Cu and Fe concentrations.
Not reportedDirection
Verbatim
t0“marandu grass”
e0“The rates of Nitrogen didn’t come to the maximum point to the concentrates of N, K, Mg, S, Cu and Fe.”
Claim · model-written summary
Increasing nitrogen rates reduced phosphorus absorption in plant tissue.
- Taxon
- marandu grasst0
- Organ / stage
- plant tissuee0
- Treatment
- Increasing N ratese0
- Outcome
- phosphorus absorptione0
- Direction
- reductione0
Not reportedComparator
Verbatim
t0“marandu grass”
e0“Increasing N rates promoted reduction in phosphorus absorption in plant tissue.”
Claim · model-written summary
Plants receiving urea had a higher N:S ratio.
Not reportedComparator
Verbatim
t0“marandu grass”
e0“Higher N:S relation were observed in plants which received urea as nitrogen source.”
Claim · model-written summary
Nitrogen application affected nutritional status and recovery of signal grass.
- Taxon
- signal grasse0
- Treatment
- nitrogene0
- Outcome
- nutritional status of signal grass and the recovery of thise0
Not reportedComparatorDirection
Verbatim
e0“The application of nitrogen, affected the nutritional status of signal grass and the recovery of this.”