Abstract
The objective of this work was to evaluate effects of nitrogen fertilization and plant density on morphogenesis of Tanzania guinea grass. It was used a random block design with 12 treatments and two replications in a 4 × 3 factorial arrangement, with four doses of nitrogen (N) (without N application, 80, 160 or 320 kg/ha.year) and three plant densities (9, 25 or 49 plants/m²). Harvest was performed at 25 cm from the ground when the canopy intercepted 95% of the incident light. Rates of leaf appearance and pseudostem elongation were positively and linearly influenced by nitrogen, whereas phillochron and leaf life span were influenced linearly and negatively. Leaf elongation responded positively to two factors, whereas leaf senescence rate and number of live leaves were not influenced by the factors evaluated. Number of total, basal and aerial tillers were greater at the density of 9 plants/m² and at the nitrogen dose of 320 kg/ha.year. Nitrogen increases production of leaves and tillers in Tanzania guinea grass defoliated at 95% of light interception, but high density of plants reduces the number of tiller per bunch.
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Claims 6
Claim · model-written summary
Nitrogen increased leaf appearance and pseudostem elongation rates linearly.
- Taxon
- Tanzania guinea grasst0
- Treatment
- nitrogene0
- Outcome
- Rates of leaf appearance and pseudostem elongatione0
- Direction
- positivelye0
Not reportedComparator
Verbatim
e0“Rates of leaf appearance and pseudostem elongation were positively and linearly influenced by nitrogen”
t0“Tanzania guinea grass”
Claim · model-written summary
Nitrogen linearly decreased phillochron and leaf life span.
- Taxon
- Tanzania guinea grasst0
- Treatment
- nitrogent0
- Outcome
- phillochron and leaf life spane0
- Direction
- negativelye0
Not reportedComparator
Verbatim
e0“phillochron and leaf life span were influenced linearly and negatively”
t0“Tanzania guinea grass under nitrogen doses”
Claim · model-written summary
Leaf elongation responded positively to nitrogen and plant density.
- Taxon
- Tanzania guinea grasst0
- Treatment
- nitrogen doses and plant densitiest0
- Outcome
- Leaf elongatione0
- Direction
- positivelye0
Not reportedComparator
Verbatim
e0“Leaf elongation responded positively to two factors”
t0“Tanzania guinea grass under nitrogen doses and plant densities”
Claim · model-written summary
Leaf senescence rate and live leaf number were unaffected by evaluated factors.
- Taxon
- Tanzania guinea grasst0
- Treatment
- nitrogen doses and plant densitiest0
- Outcome
- leaf senescence rate and number of live leavese0
- Direction
- not influencede0
Not reportedComparator
Verbatim
e0“leaf senescence rate and number of live leaves were not influenced by the factors evaluated”
t0“Tanzania guinea grass under nitrogen doses and plant densities”
Claim · model-written summary
Total, basal and aerial tiller counts were greater at 9 plants/m² and 320 kg/ha.year nitrogen.
- Taxon
- Tanzania guinea grasst0
- Treatment
- 9 plants/m²e0
- Outcome
- Number of total, basal and aerial tillerse0
- Direction
- greatere0
- Qualifier
- 320 kg/ha.yeare0
Not reportedComparator
Verbatim
e0“Number of total, basal and aerial tillers were greater at the density of 9 plants/m² and at the nitrogen dose of 320 kg/ha.year”
t0“Tanzania guinea grass”
Claim · model-written summary
High plant density reduces tillers per bunch.
- Taxon
- Tanzania guinea grasst0
- Treatment
- high density of plantse0
- Outcome
- number of tiller per bunche0
- Direction
- reducese0
Not reportedComparator
Verbatim
e0“high density of plants reduces the number of tiller per bunch”
t0“Tanzania guinea grass”
The same questions in other papers
nitrogen · growth · Megathyrsus maximus (Guinea grass)Positive and negative results
14 papers in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- positive
- no effect
12 papers more in this group
See all 16 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.