Abstract
Spring wheat (Triticum aestivum) plants normally produce tillers, many of which do not survive to produce grain-bearing spikes. Increasing the percentage of tillers that survive has hypothesized as an approach for increasing yield of wheat plants. This study was conducted to determine the effects of plastic film mulch on percentage of abortive tillers and harvesting index in two spring wheat populations, and to explore its mechanism in relation to size inequality and life-history strategies theory. Field-grown spring wheat mulched with plastic film showed a remarkable increase in grain yield (+38.5% of non-mulched control averagely), which mainly resulted from the significant increase in above ground biomass (+44.7%). At the same time, however, reproductive allocation (spike weight/above ground biomass, -5.2%) and harvesting index (-4.5%) were significantly lower (p0.05) in mulched than unmulched populations in both 2 cultivars. Meanwhile, the number and weight of barren shoot and the ratio of barren shoot biomass were significantly greater in mulched populations than unmulched controls both at booting, flowering and ripening stages. From tilling to ripening stages, the trend of G (Gini coefficient) showed obvious differences between mulched populations (∧ type with the peak of G at booting stages) and non-mulched controls (∨type with the lowest G at flowering and rebounded at ripening stage). At booting and flowering, the G was significantly higher in mulched populations than unmulched controls, and it was just contrary at ripening. Reproductive allocation and harvesting index (HI) were both negatively correlated to average G of the populations. From these results, we concluded that appreciable growth redundancy occurred in spring wheat populations mulched with plastic film may result from the exacerbated inter-plant competition and self-thinning (evidenced by increasing in the degree of Gini coefficient at booting and flowering stages). Thus, spring wheat cultivation with plastic film mulching does not always mean efficiency, although there is a remarkable increase in grain yields.
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Claims 8
Claim · model-written summary
Plastic film mulch increased spring wheat grain yield by 38.5% relative to non-mulched control in the field.
- Taxon
- spring wheat
Triticum aestivume1 - Treatment
- mulched with plastic filme1
- Outcome
- grain yielde1
- Direction
- increasee1
- Value
- +38.5%e1
- Comparator
- non-mulched controle1
- Setting
- Field-growne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Field-grown spring wheat mulched with plastic film showed a remarkable increase in grain yield (+38.5% of non-mulched control averagely)”
Claim · model-written summary
Plastic film mulch increased above ground biomass of spring wheat by 44.7%.
- Taxon
- spring wheatTriticum aestivume1
- Treatment
- mulched with plastic filme1
- Outcome
- above ground biomasse2
- Direction
- increasee2
- Value
- +44.7%e2
- Comparator
- non-mulched controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Field-grown spring wheat mulched with plastic film showed a remarkable increase in grain yield (+38.5% of non-mulched control averagely)”
e2“which mainly resulted from the significant increase in above ground biomass (+44.7%)”
Claim · model-written summary
Reproductive allocation of spring wheat was 5.2% lower in mulched than unmulched populations.
- Taxon
- Spring wheatTriticum aestivume0
- Treatment
- mulched with plastic filme1
- Outcome
- reproductive allocatione3
- Direction
- lowere3
- Value
- -5.2%e3
- Comparator
- unmulched populationse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring wheat (Triticum aestivum) plants”
e1“Field-grown spring wheat mulched with plastic film showed a remarkable increase in grain yield (+38.5% of non-mulched control averagely)”
e3“reproductive allocation (spike weight/above ground biomass, -5.2%) and harvesting index (-4.5%) were significantly lower (p0.05) in mulched than unmulched populations in both 2 cultivars”
Claim · model-written summary
Harvesting index of spring wheat was 4.5% lower in mulched than unmulched populations.
- Taxon
- Spring wheatTriticum aestivume0
- Treatment
- mulched with plastic filme1
- Outcome
- harvesting indexe3
- Direction
- lowere3
- Value
- -4.5%e3
- Comparator
- unmulched populationse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring wheat (Triticum aestivum) plants”
e1“Field-grown spring wheat mulched with plastic film showed a remarkable increase in grain yield (+38.5% of non-mulched control averagely)”
e3“reproductive allocation (spike weight/above ground biomass, -5.2%) and harvesting index (-4.5%) were significantly lower (p0.05) in mulched than unmulched populations in both 2 cultivars”
Claim · model-written summary
Plastic film mulch increased the number and weight of barren shoots and the ratio of barren shoot biomass at booting, flowering and ripening.
- Taxon
- Spring wheatTriticum aestivume0
- Organ / stage
- booting, flowering and ripening stagese4
- Treatment
- mulched with plastic filme1
- Outcome
- the number and weight of barren shoot and the ratio of barren shoot biomasse4
- Direction
- greatere4
- Comparator
- unmulched controlse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring wheat (Triticum aestivum) plants”
e1“Field-grown spring wheat mulched with plastic film showed a remarkable increase in grain yield (+38.5% of non-mulched control averagely)”
e4“the number and weight of barren shoot and the ratio of barren shoot biomass were significantly greater in mulched populations than unmulched controls both at booting, flowering and ripening stages”
Claim · model-written summary
G (Gini coefficient) of spring wheat populations was higher in mulched than unmulched controls at booting and flowering.
- Taxon
- Spring wheatTriticum aestivume0
- Organ / stage
- booting and floweringe5
- Treatment
- mulched with plastic filme1
- Outcome
- Ge5
- Direction
- highere5
- Comparator
- unmulched controlse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring wheat (Triticum aestivum) plants”
e1“Field-grown spring wheat mulched with plastic film showed a remarkable increase in grain yield (+38.5% of non-mulched control averagely)”
e5“At booting and flowering, the G was significantly higher in mulched populations than unmulched controls, and it was just contrary at ripening”
Claim · model-written summary
G (Gini coefficient) of spring wheat populations was lower in mulched than unmulched controls at ripening.
- Taxon
- Spring wheatTriticum aestivume0
- Organ / stage
- ripeninge5
- Treatment
- mulched with plastic filme1
- Outcome
- Ge5
- Direction
- lowerinferrede5
- Comparator
- unmulched controlse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring wheat (Triticum aestivum) plants”
e1“Field-grown spring wheat mulched with plastic film showed a remarkable increase in grain yield (+38.5% of non-mulched control averagely)”
e5“At booting and flowering, the G was significantly higher in mulched populations than unmulched controls, and it was just contrary at ripening”
Claim · model-written summary
Reproductive allocation and harvesting index were negatively correlated with average G of the populations.
- Taxon
- Spring wheatTriticum aestivume0
- Material
- populationse6
- Outcome
- Reproductive allocation and harvesting indexe6
- Direction
- negatively correlatede6
- Qualifier
- average G of the populationse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring wheat (Triticum aestivum) plants”
e6“Reproductive allocation and harvesting index (HI) were both negatively correlated to average G of the populations”
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See all 149 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.