Abstract
A comparison and analysis of the leaf area index(LAI)of Leymus chinensis of the Inner Mongolia L.chinensis population, which had undergone different mowing treatment for 17 years, reveals that the leaf area index of the L. chinensis population rapidly decreased under successive years of mowing, and the negative effect could be weakened by rotative mowings. Mowing every several years could promote the growth of L. chinensis population and increase its leaf area index, while mowing during the seed setting and post seed-setting stages would seriously decrease the leaf area index. Less serious negative effect to LAI occurs when mowing during the L.chinensis flowering stage. The least negative effect to the LAI of the grass happens when mowing after the seed has matured. The variation of L.chinensis LAI results mostly from the difference of the grass's offshoots density, also from the variation of the average leaf area, whereas the mean leaf number per offshoot affects very slightly the LAI. The LAI of L.chinensis. population is significantly correlated to the height of the vegetative tillers of each plant, the weight of dry matter, the density of the offshoots, and relative biomass, but not to the height of the reproductive tillers and the total community biomass.
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Claims 12
Claim · model-written summary
Successive mowing decreased leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- successive years of mowinge0
- Outcome
- leaf area indexe0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“leaf area index of the L. chinensis population rapidly decreased under successive years of mowing”
t0“Leymus chinensis”
Claim · model-written summary
Rotative mowing weakened the negative effect on leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- rotative mowingse0
- Outcome
- negative effecte0
- Direction
- weakenede0
Not reportedComparator
Verbatim
e0“the negative effect could be weakened by rotative mowings”
t0“Leymus chinensis”
Claim · model-written summary
Mowing every several years increased leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- Mowing every several yearse0
- Outcome
- leaf area indexe0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“Mowing every several years could promote the growth of L. chinensis population and increase its leaf area index”
t0“Leymus chinensis”
Claim · model-written summary
Mowing during seed setting decreased leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- mowing during the seed settinge0
- Outcome
- leaf area indexe0
- Direction
- decreasee0
Not reportedComparator
Verbatim
e0“mowing during the seed setting and post seed-setting stages would seriously decrease the leaf area index”
t0“Leymus chinensis”
Claim · model-written summary
Mowing after seed setting decreased leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- post seed-setting stagese0
- Outcome
- leaf area indexe0
- Direction
- decreasee0
Not reportedComparator
Verbatim
e0“post seed-setting stages would seriously decrease the leaf area index”
t0“Leymus chinensis”
Claim · model-written summary
Mowing at flowering had a less serious negative effect on leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- mowing during the L.chinensis flowering stagee0
- Outcome
- LAIe0
- Direction
- Less serious negative effecte0
Not reportedComparator
Verbatim
e0“Less serious negative effect to LAI occurs when mowing during the L.chinensis flowering stage”
t0“Leymus chinensis”
Claim · model-written summary
Mowing after seed maturation had the least negative effect on leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- mowing after the seed has maturede0
- Outcome
- LAIe0
- Direction
- least negative effecte0
Not reportedComparator
Verbatim
e0“The least negative effect to the LAI of the grass happens when mowing after the seed has matured”
t0“Leymus chinensis”
Claim · model-written summary
Offshoot density was the main source of variation in leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Organ / stage
- offshootse0
- Outcome
- LAIe0
Not reportedDirection
Verbatim
e0“The variation of L.chinensis LAI results mostly from the difference of the grass's offshoots density”
t0“Leymus chinensis”
Claim · model-written summary
Average leaf area also contributed to leaf area index variation.
- Taxon
- Leymus chinensisLeymus chinensist0
- Organ / stage
- leafe0
- Outcome
- average leaf areae0
Not reportedDirection
Verbatim
e0“also from the variation of the average leaf area”
t0“Leymus chinensis”
Claim · model-written summary
Mean leaf number per offshoot had only a slight effect on leaf area index.
- Taxon
- Leymus chinensisLeymus chinensist0
- Organ / stage
- offshoote0
- Outcome
- LAIe0
Not reportedDirection
Verbatim
e0“the mean leaf number per offshoot affects very slightly the LAI”
t0“Leymus chinensis”
Claim · model-written summary
Leaf area index correlated significantly with vegetative tiller height, dry matter weight, offshoot density and relative biomass.
- Taxon
- Leymus chinensisLeymus chinensist0
- Organ / stage
- vegetative tillerse0
- Outcome
- LAIe0
Not reportedDirection
Verbatim
e0“The LAI of L.chinensis. population is significantly correlated to the height of the vegetative tillers of each plant, the weight of dry matter, the density of the offshoots, and relative biomass”
t0“Leymus chinensis”
Claim · model-written summary
Leaf area index did not correlate with reproductive tiller height or total community biomass.
- Taxon
- Leymus chinensisLeymus chinensist0
- Organ / stage
- reproductive tillerse0
- Outcome
- total community biomasse0
Not reportedDirection
Verbatim
e0“but not to the height of the reproductive tillers and the total community biomass”
t0“Leymus chinensis”
The same questions in other papers
pruning · growth · Leymus chinensisPositive and negative results
3 papers in the same direction as this paper · 8 in the opposite direction
- negative
- negative
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8 papers more in this group
See all 12 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.