Abstract
Westerwolds ryegrass was grown in tubes on artificial soil profiles at N rates equivalent to 25, 50 or 100 kg/ha with a water table maintained 70 cm below the soil surface. Average results/plant after 13 weeks at low and high N were: DM yield of tops 5.0 and 14.6 g, water consumption 2660 and 4850 cm2, DM yield of roots 1.4 and 3.4 g, total length of all primary roots 2589 and 3374 cm, number of primary roots 103 and 161, number of secondary roots in topsoil 63 and 83 and in subsoil 71 and 83, and total root surface area 1084 and 1736 cm2. ADDITIONAL ABSTRACT: L. multiflorum plants were grown on sandy soil in asbestos tubes with an inner diameter of 15 cm, and 75 cm high, and supplied with 25, 50 or 100 kg N/ha. The soil water level was maintained at 70 cm below soil level. Top growth 8 and 13 weeks after sowing was progressively enhanced by the 2 higher rates, weight increments amounting to at least 72 and 188 %, respectively. These growth increases were accompanied by augmented water consumption, as well as root growth and numbers. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Claims 10
Claim · model-written summary
Higher nitrogen increased top dry matter from 5.0 to 14.6 g.
- Taxon
- Lolium multiflorum var. westerwoldicum
Lolium multiflorumt0 - Treatment
- Ne0
- Outcome
- DM yield of topse0
- Value
- 5.0 and 14.6 ge0
- Comparator
- lowe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average results/plant after 13 weeks at low and high N were: DM yield of tops 5.0 and 14.6 g”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen increased water consumption from 2660 to 4850 cm2.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Outcome
- water consumptione0
- Value
- 2660 and 4850 cm2e0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water consumption 2660 and 4850 cm2”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen increased root dry matter from 1.4 to 3.4 g.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Outcome
- DM yield of rootse0
- Value
- 1.4 and 3.4 ge0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DM yield of roots 1.4 and 3.4 g”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen increased total primary root length from 2589 to 3374 cm.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Outcome
- total length of all primary rootse0
- Value
- 2589 and 3374 cme0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total length of all primary roots 2589 and 3374 cm”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen increased primary root number from 103 to 161.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Outcome
- number of primary rootse0
- Value
- 103 and 161e0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of primary roots 103 and 161”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen increased topsoil secondary roots from 63 to 83.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Outcome
- number of secondary roots in topsoile0
- Value
- 63 and 83e0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of secondary roots in topsoil 63 and 83 and in subsoil 71 and 83”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen increased subsoil secondary roots from 71 to 83.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Outcome
- in subsoile0
- Value
- 71 and 83e0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of secondary roots in topsoil 63 and 83 and in subsoil 71 and 83”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen increased root surface area from 1084 to 1736 cm2.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Outcome
- total root surface areae0
- Value
- 1084 and 1736 cm2e0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total root surface area 1084 and 1736 cm2”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen rates enhanced top growth 8 weeks after sowing by at least 72%.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Treatment
- 2 higher ratese0
- Outcome
- Top growthe0
- Direction
- enhancede0
- Value
- 72e0
- Qualifier
- 8e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top growth 8 and 13 weeks after sowing was progressively enhanced by the 2 higher rates, weight increments amounting to at least 72 and 188 %, respectively”
t0“Lolium multiflorum var. westerwoldicum”
Claim · model-written summary
Higher nitrogen rates enhanced top growth 13 weeks after sowing by at least 188%.
- Taxon
- Lolium multiflorum var. westerwoldicumLolium multiflorumt0
- Treatment
- 2 higher ratese0
- Outcome
- Top growthe0
- Direction
- enhancede0
- Value
- 188 %e0
- Qualifier
- 13 weekse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top growth 8 and 13 weeks after sowing was progressively enhanced by the 2 higher rates, weight increments amounting to at least 72 and 188 %, respectively”
t0“Lolium multiflorum var. westerwoldicum”
The same questions in other papers
nitrogen · yield · Lolium multiflorum (Italian ryegrass)Results differ
20 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- negative
22 papers more in this group
See all 26 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.