Abstract
Agronomic practices improve seed yield by regulating seed yield components, and the relationship between seed yield and seed yield components is still unclear in smooth bromegrass (Bromus inermis). To optimize seed production and yield in smooth bromegrass, a five-year field trial was designed with split-split-plot to study the combined effects of row spacing (30, 45, 60, and 75 cm), phosphorus (0, 60, 90, and 120 kg P ha−1) and nitrogen (0 and 100 kg N ha−1) on seed yield and seed yield components including fertile tillers m−2 (FTs), spikelets per fertile tiller (SFT), florets per spikelet (FS), and seeds per spikelet (SS). The results showed that FTs as a key factor had a positive effect to seed yield with the biggest pathway coefficient, while SS had a negative effect. Meanwhile, an interaction effect between FTs and SS was observed. FS and SS were increased with phosphorus application under the condition of sufficient nitrogen. In addition, sufficient precipitation at the non-growing season resulted in more FTs in the next year in rain-fed regions. Therefore, the optimum seed yield of smooth bromegrass can be obtained with row spacing (45 cm), nitrogen (100 kg N ha−1), and phosphorus application (60 kg P ha−1).
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Claims 6
Claim · model-written summary
Fertile tillers per square meter had a positive effect on seed yield of smooth bromegrass, with the largest path coefficient.
- Taxon
- smooth bromegrass
Bromus inermist0 - Treatment
- FTse1
- Outcome
- seed yielde1
- Direction
- positive effecte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Smooth Bromegrass”
e1“FTs as a key factor had a positive effect to seed yield with the biggest pathway coefficient”
Claim · model-written summary
Seeds per spikelet had a negative effect on seed yield of smooth bromegrass.
- Taxon
- smooth bromegrassBromus inermist0
- Treatment
- SSe2
- Outcome
- seed yielde1
- Direction
- negative effecte2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Smooth Bromegrass”
e1“FTs as a key factor had a positive effect to seed yield with the biggest pathway coefficient”
e2“while SS had a negative effect”
Claim · model-written summary
An interaction effect between fertile tillers and seeds per spikelet on seed yield was observed in smooth bromegrass.
- Taxon
- smooth bromegrassBromus inermist0
- Treatment
- FTs and SSe3
- Outcome
- interaction effecte3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Smooth Bromegrass”
e3“an interaction effect between FTs and SS was observed”
Claim · model-written summary
Florets per spikelet and seeds per spikelet increased with phosphorus application under sufficient nitrogen in smooth bromegrass.
- Taxon
- smooth bromegrassBromus inermist0
- Treatment
- phosphorus applicatione4
- Outcome
- FS and SSe4
- Direction
- increasede4
- Qualifier
- under the condition of sufficient nitrogene4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Smooth Bromegrass”
e4“FS and SS were increased with phosphorus application under the condition of sufficient nitrogen”
Claim · model-written summary
Sufficient precipitation at the non-growing season resulted in more fertile tillers in the next year in rain-fed regions.
- Taxon
- smooth bromegrassBromus inermist0
- Treatment
- sufficient precipitation at the non-growing seasone5
- Outcome
- FTse5
- Direction
- moree5
- Qualifier
- in the next yeare5
- Setting
- rain-fed regionse5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Smooth Bromegrass”
e5“sufficient precipitation at the non-growing season resulted in more FTs in the next year in rain-fed regions”
Claim · model-written summary
Optimum seed yield of smooth bromegrass can be obtained with row spacing of 45 cm.
- Taxon
- smooth bromegrassBromus inermist0
- Treatment
- row spacing (45 cm)e6
- Outcome
- optimum seed yielde6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Smooth Bromegrass”
e6“the optimum seed yield of smooth bromegrass can be obtained with row spacing (45 cm)”
The same questions in other papers
rainfall · yield · Bromus inermis (smooth brome grass)Positive and negative results
1 in the opposite direction
- negative
phosphorus · yield · Bromus inermis (smooth brome grass)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
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.