Intervention effectmodel-written summary

Nitrate concentration below 0.2 mM decreased the rate of dry matter production of Lolium perenne.

A claim from The influence of temperature, light intensity and nitrate concentration on dry-matter production and chemical composition of Lolium perenne L. · 1965

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrate concentration below 0.2 mM decreased the rate of dry matter production of Lolium perenne.

Taxon
Lolium perenneLolium perennet0
Treatment
the nitrate concentration of the nutrient solutione1
Outcome
rate of DM productione1
Direction
decreaseinferrede1
Value
0.2 mMe1
Qualifier
only when it fell belowe1

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSetting

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Lolium perenne
Lolium perenne · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“the nitrate concentration of the nutrient solution affected the rate of DM production only when it fell below 0.2 mM”

✓ located verbatim in the source · abstract, characters 14–130
t0

“Lolium perenne L.”

✓ located verbatim in the source · title, characters 125–142

Title

The influence of temperature, light intensity and nitrate concentration on dry-matter production and chemical composition of Lolium perenne L.

T. Alberda Netherlands Journal of Agricultural Science 1965. doi:10.18174/njas.v13i4.17475

Other claims from this paper (8)

Record rev-30d0e0ec9f4e36fb7c1cb45160b8cef3efd23f9acff37b41b5ed8c02c5483e68 · schema claims-v0.9 · position 1 in the model’s answer

nitrogen · yield · Lolium perenne (perennial ryegrass)Results differ

59 papers: 44 positive, 15 negative or no effect

14 papers in the same direction as this claim · 44 in the opposite direction

  1. negative
    Annual N rates above 500 kg/ha decreased grassland productivity the following year.

    Limits to nitrogen fertilizer on grassland. · 1984

    Same directionCites this paper

  2. positive
    High nitrogen increased yield fourfold when sulphate was added.

    The Effect of SO2onLolium perenneL. Grown at Different Levels of Sulphur and Nitrogen Nutrition · 1978

    Opposite direction

  3. positive
    Applied nitrogen increased grass tillers, leaf size and yield.

    The effects of clover variety, cutting interval and nitrogen application on herbage yields, proportions and heights in perennial ryegrass‐white clover swards · 1982

    Opposite direction

  4. positive
    Low nitrogen supply decreased the cell production rate and final cell length compared with high nitrate supply.

    Nitrogen deficiency inhibits leaf blade growth in Lolium perenne by increasing cell cycle duration and decreasing mitotic and post‐mitotic growth rates · 2008 · compared with 7.5 mM (high)

    Opposite directionAbout lacking this nutrient, so it counts the other way round

  5. positive
    Applied nitrogen increased tiller number and tiller emergence rate.

    Effects of applied nitrogen on grass yield, nitrogen content, tillers and leaves in field swards · 1984

    Opposite direction

  6. positive
    High nitrogen fertilization increased plant biomass by 49%.

    Arbuscular mycorrhiza infection enhances the growth response of Lolium perenne to elevated atmospheric pCO2 · 2002

    Opposite direction

  7. positive
    Perennial ryegrass grown alone at 360 kg N/ha per year yielded more annually than in binary mixture with red clover at 0 kg N/ha.

    Yield of binary- and multi-species swards relative to single-species swards in intensive silage systems · 2020 · compared with binary mixtures with red clover

    Opposite direction

  8. positive
    Nitrogen increased ryegrass leaf primordium production, primordia per tiller, and shoot apex length.

    Effects of applied nitrogen on grass leaf initiation, development and death in field swards · 1984

    Opposite direction

50 papers more in this group

See all 59 papers →

fertilization · yield · Lolium perenne (perennial ryegrass)Positive and negative results

40 papers: 26 positive, 14 negative or no effect

13 papers in the same direction as this claim · 26 in the opposite direction

  1. positive
    Animal production was greatest from swards previously stocked at the lowest rate with no N fertilizer, and least from those stocked at the lowest rate with N fertilizer.

    The effects of stocking rate and nitrogen fertilizer on a perennial ryegrass‐white clover sward · 1985 · compared with had been stocked at the lowest rate but had received N fertilizer

    Opposite direction

  2. positive
    High nitrogen fertilization increased plant biomass by 49%.

    Arbuscular mycorrhiza infection enhances the growth response of Lolium perenne to elevated atmospheric pCO2 · 2002

    Opposite direction

  3. positive
    Increasing fertilizer nitrogen considerably increased grass production.

    The effect of soil pH, stable manure and fertilizer nitrogen on the growth of red clover and of red clover associations with perennial ryegrass. · 1962

    Opposite direction

  4. positive
    The first fertilizer application had a positive residual effect on dry matter yield at the second cut.

    Effect of date of application and form of nitrogen on herbage production in spring · 1989

    Opposite direction

  5. positive
    Herbage dry matter yield increased when the nitrogen was split into three or four equal dressings.

    The effects of single compared with split applications of fertilizer nitrogen on the yield and seasonal production of a pure grass sward · 1968

    Opposite direction

  6. positive
    All four by-products increased overall biomass production of the ryegrass-clover mixture in an outdoor pot trial.

    Waste recovered by‐products can increase growth of grass–clover mixtures in low fertility soils and alter botanical and mineral nutrient composition · 2014

    Opposite direction

  7. positive
    Nitrogen fertilizer advanced the date of adequate spring grazing yield by 2-14 days.

    The effect of the early application of nitrogenous fertilizer and of the time of cutting in spring on the yield of rye-grass/white clover swards · 1966

    Opposite direction

  8. positive
    Fertilizer nitrogen increased herbage yield.

    THE EFFECT OF WHITE CLOVER, FERTILIZER NITROGEN AND SIMULATED ANIMAL RESIDUES ON YIELD OF GRASSLAND HERBAGE · 1962

    Opposite direction

31 papers more in this group

See all 40 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.