Abstract
After harvest, sugarcane residues left on the soil surface can alter nitrogen (N) dynamics in the plant-soil system. In Oxisols, the nitrogen fertilizer applied had its effects on the levels of ammonium and nitrate in the soil, N concentration in the plant leaves, and on the growth and productivity of second ratoon plants. The N rates tested were of 0, 60, 120, 180, and 240 kg ha−1. Each treatment was replicated four times. Four months after the experiment was started, ammonium and nitrate concentration in the soil, N levels in plant leaves, and plant growth were evaluated. Productivity was evaluated 11 months after the experiment was set. By increasing the content of mineral N in soil, plant growth variables reflected differences in the production of stems; however, it did not affect foliar N. The use of leaf analysis was not important to assess the nutritional status of nitrogen in the ratoon sugarcane. Nitrogen concentration in soil was affected by nitrogen fertilization, but not the N content in leaves. The rate of 138 kg N ha−1enabled greater production of sugarcane stalks (140 t ha−1).
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Claims 5
Claim · model-written summary
Nitrogen fertilization affected soil nitrogen concentration in ratoon sugarcane
Not reportedComparatorDirection
Verbatim
t0“RATOON SUGARCANE”
e1“Nitrogen concentration in soil was affected by nitrogen fertilization”
Claim · model-written summary
Nitrogen fertilization did not affect foliar nitrogen in ratoon sugarcane
Not reportedComparator
Verbatim
t0“RATOON SUGARCANE”
e1“Nitrogen concentration in soil was affected by nitrogen fertilization”
e2“however, it did not affect foliar N”
Claim · model-written summary
Increasing mineral N in soil was associated with differences in stem production of ratoon sugarcane
- Taxon
- ratoon sugarcanet0
- Treatment
- increasing the content of mineral N in soile3
- Outcome
- production of stemse3
Not reportedDirection
Verbatim
t0“RATOON SUGARCANE”
e3“By increasing the content of mineral N in soil, plant growth variables reflected differences in the production of stems”
Claim · model-written summary
Leaf analysis was not important for assessing the nutritional status of nitrogen in ratoon sugarcane
Verbatim
t0“RATOON SUGARCANE”
e4“The use of leaf analysis was not important to assess the nutritional status of nitrogen in the ratoon sugarcane”
Claim · model-written summary
A nitrogen rate of 138 kg N ha-1 gave greater sugarcane stalk production (140 t ha-1)
- Taxon
- sugarcanee5
- Treatment
- 138 kg N ha−1e5
- Outcome
- production of sugarcane stalkse5
- Direction
- greatere5
- Value
- 140 t ha−1e5
Not reportedComparator
Verbatim
e5“The rate of 138 kg N ha−1enabled greater production of sugarcane stalks (140 t ha−1)”
The same questions in other papers
nitrogen · yield · Saccharum officinarum (sugarcane)Results differ
117 papers in the same direction as this paper · 15 in the opposite direction · 4 reporting no difference from an alternative
- positive
- positive
- no effect
133 papers more in this group
See all 137 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.