Abstract
Herbage production and tiller dynamics were measured in "Grasslands Nui" perennial ryegrass (Lolium perenne L.) swards for 3 months during summer, under conditions of either irrigation or water stress. Measurements continued through winter and early spring when both treatments were well supplied with water. At the end of the stress period tiller densities were 11000 and 4000 tillers/m* in the irrigated and the stressed plots respectively. Lack of moisture stopped tiller emergence but had little effect on the relative death rate of tillers formed before water stress. During the stress period, herbage production was greater in the irrigated than in the stressed plots, average accumulation rates of 68 and 21 kg DM/ ha/dav respectively being recorded. After re-watering, there was compensatory growth by the previously stressed swards resulting in a higher accumulation rate, the average accumulation rates were 24 and 15 kg DM/ha/dav for the previously stressed and irrigated plots respectively. The higher accumulation rate was due mainly to a greater rate of tillering in the previously stressed plots. Differences between treatments in herbage production and tillering were significant up to 3 months after rewatering. The results are discussed in relation to pasture management. Keywords: Nui, Perennial ryegrass, drought, tiller density, irrigation
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Claims 7
Claim · model-written summary
Water stress reduced tiller density of perennial ryegrass compared with irrigation, 4000 versus 11000 tillers/m2 at the end of the stress period.
- Taxon
- perennial ryegrass
Lolium perennee0 - Treatment
- water stresse0
- Outcome
- tiller densitiese1
- Direction
- lowerinferrede1
- Value
- 11000 and 4000 tillers/m*e1
- Comparator
- irrigatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“perennial ryegrass (Lolium perenne L.) swards for 3 months during summer, under conditions of either irrigation or water stress”
e1“At the end of the stress period tiller densities were 11000 and 4000 tillers/m* in the irrigated and the stressed plots respectively”
Claim · model-written summary
Lack of moisture stopped tiller emergence in perennial ryegrass.
- Taxon
- perennial ryegrassLolium perennee0
- Treatment
- Lack of moisturee2
- Outcome
- tiller emergencee2
- Direction
- stoppede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“perennial ryegrass (Lolium perenne L.) swards for 3 months during summer, under conditions of either irrigation or water stress”
e2“Lack of moisture stopped tiller emergence but had little effect on the relative death rate of tillers formed before water stress”
Claim · model-written summary
Lack of moisture had little effect on the relative death rate of tillers formed before water stress.
- Taxon
- perennial ryegrassLolium perennee0
- Treatment
- Lack of moisturee2
- Outcome
- relative death rate of tillerse2
- Direction
- no_changeinferrede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“perennial ryegrass (Lolium perenne L.) swards for 3 months during summer, under conditions of either irrigation or water stress”
e2“Lack of moisture stopped tiller emergence but had little effect on the relative death rate of tillers formed before water stress”
Claim · model-written summary
Herbage production was greater in irrigated than in water-stressed perennial ryegrass swards during summer.
- Taxon
- perennial ryegrassLolium perennee0
- Treatment
- irrigatede3
- Outcome
- herbage productione3
- Direction
- greatere3
- Value
- 68 and 21 kg DM/ ha/dave3
- Comparator
- stressed plotse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“perennial ryegrass (Lolium perenne L.) swards for 3 months during summer, under conditions of either irrigation or water stress”
e3“herbage production was greater in the irrigated than in the stressed plots, average accumulation rates of 68 and 21 kg DM/ ha/dav respectively being recorded”
Claim · model-written summary
After re-watering, previously stressed swards had a higher herbage accumulation rate than irrigated swards.
- Taxon
- perennial ryegrassLolium perennee0
- Treatment
- re-wateringe4
- Outcome
- accumulation ratee4
- Direction
- highere4
- Value
- 24 and 15 kg DM/ha/dave4
- Comparator
- irrigatede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“perennial ryegrass (Lolium perenne L.) swards for 3 months during summer, under conditions of either irrigation or water stress”
e4“After re-watering, there was compensatory growth by the previously stressed swards resulting in a higher accumulation rate, the average accumulation rates were 24 and 15 kg DM/ha/dav for the previously stressed and irrigated plots respectively”
Claim · model-written summary
The higher accumulation rate after re-watering was due mainly to a greater rate of tillering in previously stressed swards.
- Taxon
- perennial ryegrassLolium perennee0
- Outcome
- accumulation ratee5
- Qualifier
- a greater rate of tilleringe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“perennial ryegrass (Lolium perenne L.) swards for 3 months during summer, under conditions of either irrigation or water stress”
e5“The higher accumulation rate was due mainly to a greater rate of tillering in the previously stressed plots”
Claim · model-written summary
Differences between water-stressed and irrigated perennial ryegrass in herbage production and tillering were significant up to 3 months after rewatering.
- Taxon
- perennial ryegrassLolium perennee0
- Treatment
- water stresse0
- Outcome
- herbage production and tilleringe6
- Qualifier
- up to 3 months after rewateringe6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“perennial ryegrass (Lolium perenne L.) swards for 3 months during summer, under conditions of either irrigation or water stress”
e6“Differences between treatments in herbage production and tillering were significant up to 3 months after rewatering”
The same questions in other papers
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- no effect
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See all 7 papers →drought · yield · Lolium perenne (perennial ryegrass)Positive and negative results
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- positive
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See all 10 papers →rewatering · molecular: metabolites · Lolium perenne (perennial ryegrass)Results agree
1 paper in the same direction as this paper
- positive
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.